Antenna search results


Showing matches 1 to 153 of 153


The Hentenna was developed by Japanese 6 Meter Hams, JE1DEU / JH1FCZ/ JH1YST in the 1970's and can be designed and built for hf thru uhf and possibly beyond! Sizes given are for 6m.

After much experimentation, finally, the antenna was developed with good performance, however, it was difficult to explain why the performance was so good, or how it is worked basically at that time. So it was named Hentenna, "Hen" means "strange" in Japanese.

The antenna has good performance and many advantages and it has become very popular in Japan. Many JA st
ations make it and enjoy it at home or in the field. Some Japanese 6m beacon stations are using the Hentenna antenna.


The Double Bazooka Dipole is a very efficient single band antenna which is very quiet and does not require the use of a balun. This antenna consists of coax (RG58) or other 50 ohm type with the shield split at the center and the feedline attached to the open ends.

The $4 Special Antenna

Sure, you can find "all-band wire antennas" for sale in the back pages of Ham magazines costing $150 or more. But beware
: Marconi spins in his grave every time a ham buys an aerial instead of building it. The plain and simple truth is that wire antennas for the HF bands were intended to be hand-made and not store-bought.

Untold generations of intrepid Radio Hams have fashioned their own equipment out of spit and bailing wire. Do you think the spark-gap dudes of the 1920's just went out and bought ready-built G5RV's from HRO or AES? No way! They slapped together aerials out of bedsprings, chewing gum, and frozen cow poop. For them, every day was Field Day. I think that home-built antennas should be awarded 10 db of "honorary gain" simply by virtue of their ingenuity. And in this world of microprocessor controlled micro-rigs, constructing one may be your only chance to build something and actually see it work on the air. Think about it.

The Fence Fan Dipole

A Quick, Easy and Inexpensive Multiband Antenna By W6HDG

Australian Broadband Dipole 2MHz o 30MHz with no ATU

A dipole can be modified by inserting resistive loading networks so as to produce standing waves between the feedpoint and the networks. The authors have, by adjustment of the networks and the dipole sections, developed a travelling wave dipole whose VSWR is less than 2:1 from 3 to 15 MHz and does not exceed 2.6 to 1 from 2.3 to at least 30 MHz.

Skywire Loop Antenna

In we ham radio operators' continual quest for the perfect antenna system, we try some strange things at times, but often, the simplest is also the best. That is certainly the case with the basic "loop" antenna, an often misunderstood critter, but one that gives absolutely the most for each foot of wire of any antenna I have had occasion to play with.

First, let me reassure you that such an antenna does not necessarily take much room. One reason I went to one in the first place is because I didn't have room for a 260-foot-long dipole for 160 and I wanted to give the "top band" a try for the first time in my 45 years of being a ham. If you are talking 75 meters (and up if you
want a multi-band antenna...more later on that), it's only about 65 feet on a side in a square arrangement

Easy dual band VF UHF vertical

A vertical dual-band antenna for 144 and 430 MHz made with a TV twin lead and coaxial cable.

6 Meter 5/8 Wave Vertical Antenna

The G3JVL 6 Meter ground plane vertical is a compact antenna that is ideal for portable operations. If needed, it can be disassembled into a very small bundle no longer than the longest element.

Although a little engineering work is required, it is well within the abilities of the home workshop and all you newly licensed amateurs or 6 Meter buffs!

9 band vertical HF antenna

Simple vertical radiator with a not so simple matching box. No traps, no tuner required.

Cheap Yagi Antennas for VHF/UHF

These antennas are relatively small, easily constructed from common materials/tools and have surprising performance.
The feed method is greatly simplified by directly soldering the coax to the driven element. No baluns or gamma matches
are used in this design. This simplified feed uses the structure of the antenna itself for impedance matching.

Coaxial Colinear

You can build a colinear from coax by following this design. You will need to scale it to suit the frequency you wish to use.

Portable Magnetic Loop Antenna for 20m, 30m, 40m

A simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres, but by changing the overall length of the wire coverage of other bands is feasible.

K3MT presents the GRASSWIRE - another approach to hidden HF antennas

Deed restrictions got you down? Neighbors intimidating your tower plans? Need a really easy portable HF antenna? Then
the grasswire may be the answer! Virtually invisible, lightweight, and compact (you can carry one in your hip pocket),
this antenna works! It has been used by K3MT in various installations for more than 10 years.


The Six Meter Extended Double Zepp is a very easy and inexpensive antenna for the 6 meter buff to build in about an hour or less and will add about 3 db to your signal from it's broadside bi-directional pattern when installed about a half wave up from the ground. You mignt call it a diplole with gain!

All of the materials used to build this antenna can be found locally or you may even have them laying around.


Construction notes for that most basic of antennas a dip

HB9ABX RoomCap Antenna

Yet another new, revolutionary design which allows the construction of small
HF antennas which provide the same efficiency as large antennas.

(Maybe but probably not !!! - G6KIZ)

This antenna can be built for all HF bands, from 10 to 80 m.

VHF / UHF Direct Connect Beams

details for several 2 to 4 element beams from 10m to 70cm


Are you looking for an inexpensive wire antenna that makes possible HF operation on all bands 10M through to 80M with wide bandwidth? This Delta Loop is a threesided antenna suspended high in the air by vertical supports such as tall evergreen trees. Recommended height is 40 feet or more at highest point but higher is better. It's one feed line eliminates the need for multiple antennas to cover the HF bands.

HOME BREW 6M HALO Mobile on "The Magic Band"

This is the Jones version of the Lawn Chair 6M Halo as viewed through the rear window of the mobile.

Ain't that just the sexiest thing you've ever seen on the outside of a vehicle?

144 430 Mhz portable antenna

Design for a portable J pole

Easy Homemade 2.4 Ghz Omni Antenna

An easy stepbystep guide go making a homemade wireless antenna for a fraction of the cost of commercial antenna. Uses readily available parts and requires no specialist tools or knowledge. Or in geek speak a diy homebrew omnidir
ectional colinear dipole design suitable for 802.11 wifi compatible hardware with external antenna connector.

EI7BA Multiband Cubical Quad

It covers six bands 20m to 10m on HF and also 6m. It is a Boomless (spider quad gem quad) design. It uses Glassfibre arms (a must). It uses a single coax line to a homebrew antenna switch. From there a seperate feedline goes to each of the Driven Element feedpoints. There is a homebrew Choke Balun at each feedpoint.

I have no accurate method to measure forward gain but I reckon it is the text book 6 to 7 db. F/B ratio is consistently 5 to 6 S points on my TS850 S meter on all bands 20 - 10m. I don't know how many dBs per S Point for my TS 850 but it is surely at least 3dB per S Point. So this translates to a minimum of 15 dB and arguably as high as 30dB. As wi
th all 2 element Quads It has a wide beamwidth about 60 degrees.

ADDENDUM.. An extra two bands..!
I have added three elements for 6m and 2 elements for the European 4m (70mHz) band to the existing spider, and on a seperate 6ft boom which is clamped to the spider, I have 5 elements for 2m, and 9 elements for 70cms.. A grand total of 11 bands..


I was checking the F/B ratio on a station about 200 miles away in South Carolina who was running about 1KW. He was S8 to 9 with me pointed on him, however an S4 with my backside to him. That's a 4 S-unit difference, and at 6 db per S-Unit, aprox. 24 db F/B ratio, which is around spec.

During normal conditions via groundwave, I can talk about 200 - 250 miles out with my antenna 20 ft. AGL.


The 6 Meter Band may be dead at times, but help bring it to life with Larry's rotatable loop project. Simple, easy to build and won't break the bank.


These plans for this version of the EDZ for 6 Meters came from the previous Webmaster of the NRRL, the counterpart of the ARRL in Norway, LA2PJ, for all to enjoy and our many thanks and best wishes go out to him. This is a very inexpensive and easy antenna to build and has been used for many years in Europe by 6 Meter operators with great success!


This is
a combination center and top loaded multiband antenna. It gets a good boost in efficiency from the
capacity hat which, unlike the commercial bugcatcher antennas, is located where it should be: as high as
practical on the whip. The low profile of the capacity hat lets it cut through the wind while still remaining
effective. This is the largest diameter hat which can withstand highway speeds without using a stiffer whip.

Band switching is accomplished by moving the jumper plug to different tap points on the coil. You have
to stop, get out, and manually change the tap.

Vertical half-wave aerials for 4m

For vertical use, it is much more mechanically convenient to end-feed an antenna: this will allow it to be mounted higher, and avoids distortion of its omnidirectional polar pattern by the nearby mast. The disadvantage is that the end-feed point is high-impedance, and so requires a high-Q (i.e. narrow bandwidth) circuit to match it to 50-ohm feeder. However, as the FM section of the 4m band is such a narrow allocation (only some 0.4% of its frequency), this narrow bandwidth matchi
ng is no disadvantage (as it would be on say 6m, where an aerial may be required to operate over a 4% frequency range).

2 meter mobile antenna

The antenna is an atypical vertical: instead of the common 1/4 wave vertical monopole or ground plane this design
employs a 3/8 wave vertical section and short radials to complete the "ground plane." Effectively, an off-center-fed
vertical dipole that does not rely on the earth to complete the bottom half of the antenna.

160-10M Sturba Curtain

This design will work all bands from Top Band to 10M using a tuner.

Simple double-quad

Simple bent wire antenna with sheet reflector.

A centre-fed "co-axial" dipole for 4m

In contrast to the end-fed designs, which can be difficult to set up because of their narrow bandwidth, this alternative uses a low-impedance centre-feed, and hence offers a broader bandwidth.
In this design, the radiating half-wave section is formed from the centre conductor of a piece of co-axial cable, which is fed via two sections of its outer braiding which have been left in place.

An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters

A coaxial-cable trap dipole antenna installed in the attic provides a surprisingly effective solution to HF operation on the 10, 15, 20, 30, 40, and 80 meter amateur bands.

Double-L Antenna For 80/160

A popular misconception about vertical antennas for the low bands is that they must have elaborate ground systems. Here’s a vertical antenna for 80 and 160, fed wit
h a single feed line that is simple, effective, and requires no ground system. You won’t beat the 4-squares, but you will hold your own against a grounded quarter wave with ridiculous amounts of copper in the ground.

Building a 2.4 GHz 10 el. Yagi

Detailed construction details

2 meter halo

Design for halo using flat aluminium strip for the loop.

Ez-12 Parabolic Reflector

Knock up this tinfoil and cardboard reflector to add to the WiFi antenna on your router for increased range.

A Moxon Rectangle For 2 Metres

The aim of the current project is to provide a lightweight loft antenna for 2 metre SSB that can be easily rotated by a homebrew driver and controller.

The lat
e Les Moxon G6XN developed what has become known as the Moxon Rectangle from a design by Fred Caton VK2ABQ. The Moxon is basically a two element Yagi with the ends bent in towards each other with a small gap separating them. The Moxon has three main characteristics: It is small as can be seen from the MoxGen program below has incredible front to back ratio and it's feed impedance is 50 ohms. The gain is around 5 db.

4 6 and 10 element Yagis for 70cm

Yagis for 70cm. Simple straight dipole with bazooka balun. Optimised for forward gain.
10 ele 11.8dB forward gain 22dB front to back ratio.
6 ele 9dB forward gain 13dB front to back ratio.
4 ele 7.6dB forward gain 14dB front to back ratio.

PA0RDT Mini Whip

Compact wideband active antenna.

Claimed effective from 10kHz to 30MHz

Frequency range: 10 kHz – 30 MHz
Power: 12 – 15 volts at 50 mA.
Second order output intercept point: > + 70 dBm.
Third order output intercept point: > + 30 dBm.
Maximum output power: in excess of – 15 dBm

Length: 100 mm, diameter: 40 mm

6-Band HF Center-Loaded Off-Center-Fed Dipole

The goal that I set out was to design an HF antenna, with a VSWR of 3:1 or less over the full bandwidth of as many amateur radio HF bands as possible, with a preference for the low- and the non-WARC bands. This design goal has been achived with a new kind of antenna;

Halo antenna for 70Mhz

Based on a commercial model using aluminum tubes from 4 and 6 mm (sold in DIY stores).

Deep Dish Cylindrical Parabolic Template

The original stickyback tape and tinfoil reflector design for improved WiFi range

Short dipoles and verticals from DJ9RB

Basic design details for a number of different antennas from 160m to 40m

Antennae for the Low Bands..80 and 160m

On the higher bands the same antenna is usually used for both TX and RX . The Low Bands are different in that one good TX antenna is probably adequate. If the TX antenna is relatively inefficient we can compensate by using more power. But for RX we require antennae that have the very best signaltonoise ratio (SNR) that we can muster. It is also very advantageous if these antennae are directional. Sensitivity in the RX antenna is not really that important so long as the SNR is excellent.....A good low noise amplifier (preamp/LNA) can give us all the sensitivity that we need.



Some of you may recognize
this design as nothing more than a half wave dipole, but upon closer examination, you will see that there is a reflector at the bottom of the antenna spaced at about .15 wavelength or less from the driven, (dipole), element. This in fact, makes this antenna a 2 element wire "beam" aimed straight up at the clouds! Hence the name "Cloud Warmer Beam". NVIS style antennas work best below about 8mhz as confirmed by the U.S. military.

70 cm Quagi

A pair of 8-element quagi's, set up for RHCP. Construction is simple, with no critical tuning. Made from 1/2" PVC pipe
and #10 wire for directors and #12 wire for loops.

KE4UYP TopFed 1/4 Wave Linear Loaded Vertical For 80 and 160M

This is a vertically and horizontally polari
zed antenna the Linear loaded 1/4 wave length vertical radiator introduces very little loss. The over all radiation efficiency is high at 80% to 85%. Enhancing this vertical radiator is the 1/4 wavelength horzontally polarized radiator (counterpoise) Located at the feedpoint and note it is at the top of the antenna giving you an almost totally omnidirectional pattern of high wave angle horzontally polarized Radiation.

300khz bandwidth under 2:1 SWR on 80m
100khz bandwidth under 2:1 SWR on 160m

You will be quite amazed with how well this antenna works on either 80 or 160 meters.

QRP Six Metre Portable Dipole

Simple design using a central box and two whips. Fits onto a camera tripod.

Portable HF Transmitting Loop Antenna

Small tunable magnetic loop antenna light enough to carry while operating, it disassembles into small but rugged pieces that fit easily in a backpack or gym bag, and it can be tuned from 14 MHz to 30 MHz.

A low cost fishing pole vertical antenna by G4AON

There seems to be a myth among many newly licensed radio amateurs that an antenna works better if it costs a lot of money. This may have originated from magazine reviews which appear to be written to keep the advertising revenue up rather than serving the needs of the reader. The antenna shown here costs around one tenth the price of a commercial vertical, yet it will perform as well as (and in many cases better than) a trapped vertical antenna.

Home Brew dual band mobile antenna

This antenna is just a 1/4 wavelength resonator for both UHF and VHF band. It provides no GAIN as com
pared to other multi-section design. Yet it has the advantage of better stability against surrounding influence (e.g. different mounting method, unexpected reflection by surrounding objects, difference in stray capacitance between test bench and operating field ). The antenna consists of two sections. The lower section is a conductor cut to resonant on UHF band. The upper section is a coil which serves two purposes. For UHF band, this coil is a RFC (radio frequency choke). It blocks UHF frequency energy to flow through upper section. For VHF band, this coil enhances the inductance provided by lower section. The resultant inductor, together with surrounding stray capacitance will form a VHF resonant circuit and becomes the VHF antenna.

The Super J-Pole Antenna(Collinear Design)

Javascript for calculating the lengths of tubing to be used for the construction of a Super J-Pole. The antenna I constructed was made of 1/2" tubing.

Copper Cactus Dual-Band Super J-Pole Antenna Project

This home made j-pole is easy to build and sturdy. I have had very good results working with copper J-Poles, so I built my refined version of the classic J-Pole. I then ad
ded a short insulated section, the extra half wave of vertical length, and the needed half-wave matching stub.

80/40m Vertical +160M at a push..!!

I have always admired the Butternut vertical antennae. They are very well built using good quality doorknob capacitors and nice airwound lowloss coils. Having had an HF2 for a while I decided to see if I could make a homebrew improved..?? version.

Halo for 6 meters

A good antenna that can be used for the car as well as the house. This antenna maintains good omni-directional
horizontal polarization.

2 Element Yagi for 50 Mhz

G3SYC designed this antenna in about 1990. The antenna works best between 15 and 20 feet off the ground and some
nice dx can be worked with it. Easily folded up and stored away when not in use, and has a minimal impact when

7 Element 4M (70MHz) Beam By Paul Graver M1CCZ

This 7 element beam, designed around a centre frequency of 70.25 provides approximately 12dBi gain with a F/B ratio of 30dB.

All of the elements are 13mm diameter aluminium tube mounted through a 50mm diameter aluminium boom, including the driven element, which is not split or insulated from the boom. The overall boom length is about 5 1/2 metres. To match the beam to the 50 oh
m feeder, a Delta Match arrangement is used.

A Multiband Vertical

I have to thank Con, DF4SA, of Spiderbeam for giving me the opportunity to inexpensively try their new 18m telescoping pole. I turned it into a great 160m through 30m antenna; as a bonus it makes a good tree surrogate to hang a 15m dipole from.

An effective 10-20m DX antenna for deed restricted lots…

The simple 15′ vertical antenna shown mounted on the railing of our second floor deck has produced almost 200 countries worked around the world… VQ9’s in Chagos and 3B8’s on Mauritius in the Indian Ocean, TX0DX on Chesterfield Reef, VK0MM on Macquarie Island in the Antarctic region, BQ9P on Pratas Island off Taiwan, ZM7ZB on Chatham Island in the South Pacific along with FO0AAA on Clipperton, 9M0OO on Spratly Island in the South China Sea, JT1CO in Mongolia and on and on. What I hear, I can usually work with this little wonder and the small size and profile make it feasible for use in deed restricted neighborhoods.

THE $4 SPECIAL by Joe Tyburczy W1GFH

Now at this point, some of you may be looking at the diagram and muttering, "Jeez Joe, that'
s just a dipole fed with twinlead and used with a tuner". Well of course it is. Virtually all antennas are "di-poles" (i.e. "two sides") in some form or another. This one just happens to be made from low-cost materials.

I won't go into the theory here, but trust me: balanced feedline, properly used, does not "leak" RF and is less lossy than coax. I've tried the commercial 450-ohm ladder line, but prefer 300-ohm TV twinlead, and the cheaper the better. Radio Shack TV twinlead is ideal. Home Depot has some good stuff, too. Forget all the obsessive junk about standing waves, impedance and velocity factor. What you really need to concentrate on is getting an interesting set of antenna insulators.


Simple, inexpensive and easy to erect, this antenna provides directivity, low angle radiation and
a small gain on a number of HF bands.

Primarily designed as a point-to-point DX-radiator for 10, 12 and 15M, this antenna also does a fair job on 17, 20 and 30M. Its total length of
41 meters

A Double Quad Antenna for 1296 MHz

This antenna is a medium gain directional antenna for mobile (portable) and base station use. I have built it many years ago for mobile operation to check out how good the signal of the
ATV Relais DB0SCS is received in the villages around Schwabach (the QTH of the Relais). I found a similar type for 432 MHz in the literature and decided to calculate the dimensions for 1296 MHz. For the 432 MHz antenna a gain of more then 10dBd was mentioned. This seems reasonable for the size of the antenna. I was always satisfied with the antenna and a direct comparison to other antennas of a know gain showed that it really has to a have a gain of about 10dB over a dipole.

G5RV Multi-Band Antenna by Louis Varney,

THE G5RV ANTENNA, with its special feeder arrangement, is a multiband centre-fed antenna capable of very efficient operation on all hf bands from 3.5 to 28mhz, specifically designed
with dimensions which allow it to be installed in gardens which accommodate a reasonably-straight run of about 102ft (31.1m) for the "flat-top". However, because the most useful radiation from a horizontal or inverted-V resonant antenna takes place from the center two-thirds of its total length, up to one-sixth of this total length at each end of the antenna may be dropped vertically, semi-vertically, or bent at some convenient angle to the main body of the antenna without significant loss of effective radiation efficiency.

The RXO unitenna

Wide band vertical antenna for 40 to 15 meters band

St. Louis Vertical

The St. Louis Vertical (SLV) About 51' of twinlead is coiled on the 4' bottom section of a 20 collapsible fiberglass fishing pole. An additional 16' of twinlead in the clear serves as a vertical radiator.

Offers portable enthusiasts an easytobuild easytouse antenna which covers 1040M via a balanced line tuner and installs independently of external supports (trees are not required)

N3OX "Stealth" Multiband Vertical

I traded lawn mowing for antenna permission at the house I'm renting now, but since I don't own the place, I'm not able to install big, heavy, or very permanent antennas. Despite the practical restrictions, I wanted to have a vertical for 40m and 80m as we slide down to the sunspot minimum. This is what I came up with, and got 60m and 30m essentially for free.


This halo is made with a true Gamma Section and is fashioned from aluminum. Most of the parts are leftovers from old car projects.

Ladder Line 2 Meter J-Pole

Easy and cheap to build wire J Pole. Low SWR and can handle 50 watts

3 Eelement beam for 6 meters

This design uses a 6 foot boom and a gamma match feed arrangement.


The TriDouble dipole has two elements of 3/4 wavelength each.
It has resonance at the design freq but the impedance is high (500 Ohm) and the reactance/inductance value changes greatly when you change frequency.

To compensate for this you shorten the element length a bit and
add open wire, 400-600 Ohm (not critical). This will decrease impedance to 200 Ohm at the design frequency. This is why I use a 4:1 Current balun (must be a current balun).

The 40 meter Stealth Vertical

“You’re 30dB over 9 here…” S
o goes the consistently fine signal reports received from around the USA and beyond - on 40 meters at the peak of Sun Spot Cycle 23. The most common antenna used in ham radio mounted over poor desert soil conductivity still performs beautifully!

Trap Dipole for 17, 12 and 6 Metre

Homebrew trap diplole designed and constructed by John Beaumont G3NGD

2 meter cubical quad

This antenna can be fed with any length of a good quality RG58X using PL-259 connectors and one barrel connector to
couple the feed lines. A lightweight antenna which can be turned with almost any rotator.

The Battle Creek Special

2 versions of the Battle Creek Special (top band vertical)

First there is a wire version. The traps are make of coax cable as describe by W1FB.

The second version is a 'real' vertical make of tubes complete with a description of the traps.


Pipe is PVC and I used glue to attach the elements to the braces. The construction of the antenna is very easy and very good results, excellent reception.


Nine element long yagi on a 9.2m boom which is effective over a range of 50.0 - 51.5 Mhz and if carefully constructed and tuned then the forward gain could exceed 12dB with reference to a dipole.

W5DXP No-Tuner, All-HF-Band, Horizontal, Center-Fed Antenna

The No-Tuner, All-HF-Band, Horizontal, Center-Fed Antenna is our old friend, the 80 meter halfwave dipole dressed up a bit. By varying the length of the 450 ohm ladder-line feeding the antenna, we can achieve an SWR of less than 2:1 on all frequencies on all HF bands with the exception of the lowest part of 80m. On 75m, we are feeding the antenna with a half-wavelength of ladder-line. On 40m, we are feeding it with 3/4 wa
velength of ladder-line.


The short vee beam described has a reasonable omnidirectional pattern with a maximum directivity in a line that bisects the angle between the legs. Good low-angle radiation is obtained when a horizontal antenna has a one wavelength height above ground. Below .5 wavelengths give marginal performance. For lower heights (.5 wavelengths and less), some improvement in low angle propagation can be had by tilting the leg ends below the center feed point. This will help improve DX but at the expense of the omni pattern not being as good and will increase the vertical pattern more skyward at a higher angle.


But what's a J BEAM?
It's a vertical directional antenna made of 1/2 inch copper pipe and wood or PVC. It uses a standard J-pole antenna as the driven element and center support, with two parasitic elements-----a reflector and a director, to provide directivity and gain. See J Beam pattern below. It can be built for around $15.00 (1998 prices) and you can use your old Jpole as a basis for the JBeam. You'll probably need to shorten the main 1/2 wave element by 1 to 2 inches, as the reflector and director tend to couple and lower the resonance of your original jpole toward the lower part of the band.


Summer is for 6 meters! So YU1QT, Andra, has designed a special 5 element 6 meter moxon.
Need gain?
How about 10dbi?
The dimensions are shown below in meters.
Have fun!!!

40 Meter NVIS antenna

This project gives enough information to build a 40 meter Super-Gain antenna designed to help hams compete somewhat better with the foreign broadcast stations which practically take over the band in the evening and night time. It is based on the theory of super gain NVIS arrays, which reject QRM from low angles.

The final design....still under testing by many extremely simple, uncritical and offers large gain and QRM rejection.

The propagation studies and design work was done at Dusina Enterprises in Melbourne, Florida.
The antenna is described
as having approximately 9 db forward gain and an average of 15db rejection against low angle QRM. The antenna is useful up to about 200 miles radial distance from the transmitter in the daytime and up to around 1,000 miles at night.

Quadrifilar Helix Antennas

This is the "long tall" QHA design I use for weather satellite reception. It is included in the ham antenna section as dimensions for a 2 meter version are included.

It comprises two bifilar helical loops oriented in mutual orthogonal relationship on a common axis. The terminals of each loop are fed in antiphase and the currents in the two loops are in phase quadrature. By selecting the appropriate configuration of the loops, a wide range of pattern shapes is available".


The only construction effort necessary over a standard multi-band dipole is the fabrication of a feed block or center insulator that is about 12 inches vertically by 3 inches
wide, made of a good insulating material, such as Lucite, Bakelite, fiberglass, or PVC.

2-Element parasitic Yagis by DK7ZB for the Shortwave-Bands 10m-30m

No other antenna has a better relation between gain and expense than the 2-Element-Yagi. One element additional to the dipole will give you 4dB gain. Each further element will give much more mechanical problems and the increase in gain is only 1-2dB for the same bandwidth.

Dimensions and constuction details for several single band 2 element yagis plus some dual banders.

An implementation of the Handi-tenna by Jerry K5OE

Hand held yagi for 70cm. Originally designed for LEO downlinks.

The KL3JM modified "SRI" multiband fan dipole for 80-40-20 meters

The antenna in this project is a modification of the techniques used to design a multiband fan type dipole with little or no
tuning involved.

Battle Creek Special

Trapped wire vertical for 40m 80m and 160m

3 Element 50MHz Yagi

Gamma matched 3 element long yagi for 6 meters. 2 meter boom length 6.1dB forward gain 25dB front to back ratio

6 Element Log Periodic Yagi for 6 meters

This yagi antenna has a very clean polar pattern and a good front to back ratio.

40M Triangular Full-Wave Vertical Loop Antenna

Add the Missing Leg to that InvertedL Antenna

6 or 9 element 2 m eter Yagi

Gamma matched 6 or 9 element Yagi for 2 meters. 26dB front to back ratio and 8.5dB forward gain (6 ele) 10.5dB (9 ele)

Moxon 2m and 70cm dualband

Handheld moxon yagi designed for work with satellites

SM0DTK 20 Meter Corner Fed Vertical Moxon

Vertical Moxon wi
th different feeding.

40m 2el short yagi

Shortened 2 elem
ent yagi for 40m


The antenna is basically a full wave 80 meter loop on top and a 40 meter loop on the bottom all supported from a 64 foot center support, namely my tower. They are both fed from the center feed point with one length of 50 ohm coax. No tuner is required.

The "Lazy" Loop by Jim Moritz

The great advantage of this sytem is that the critical tuning components are nice and dry in the shack, no remote control, no waterproofing, just twiddle and go!

QFH Antenna (The Quadrifilar Helical antenna)

Provides circular polarization and complete hemispherical reception, which is precisely what is needed to receive the polar orbiting weather satellites, and as a 2 meter antenna it will receive horizontal, vertical and clockwise circular polarization’s from all directions.

The dimensions given in this article are for the 137MHz weather satellite band.

QRP Fan Dipole

The object of the exercise was to produce an aerial that would allow me to operate from 40 metres to 10 metres specifically 40 20 17 15 & 10 metres. The antenna was always going to be mounted in the attic as no external antennas are permitted at my QTH the attic allows the antenna to 'beam' roughly northwest / southeast and the house is some 40 feet above sea level. Construction would be simplified by the fact that I intended to run a maximum of 10 watts which means that the antenna wires can be simply attached to the rafters.

7 Element Yagi for 2 meters

e QM7 antenna is a simple 7 elements Yagi with 3.7 m boom length for the lower 144 MHz SSB/MGM band. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/B is about 12.5 dB.

Beverage Antenna

Do you have the room. For a Beverage to work well you need at least 1 wavelength of wire. On 160 meters that's 490 feet of wire in as straight a line as possible. If you have the room, 2 wavelengths works pretty nice.

JR3TVH Light Weight VMAP (Vertical Moxon Array for Portable)

This VMAP has a below 20 degree vertical angle and more than 5dBd as the same as 2ele Yagi and F/B ratio is the greatest over 27dB because it has a null point b
ecasue it has a pattern of Cardioid. Designed his formula and checked at any places with MFJ-259B analyzer once or twice.

Construction is very simple with NO matching unit but has a sophisticated performance at the height of some feet on the reef or soils. Two fishing rod, ropes, pegs and light, thin wires for your band expected those ar just pre-installed last night for example( w/wo a 1:1 bulun.) I designed for the impedance is optimized at 50ohm without any matching unit. But some adjustment was needed at some places near the fence or blocks, some materials as common issues.

A Small Loop Antenna for Forty Meters

Small vertically mounted loop constructed from copper tubing. Rather limited detail for copycat constructors.


This 6 element beam was designed using the free Yagi Ant
enna Design program by WA7RAI called Quick Yagi (QY4)

It was designed and optimized using 144.250mhz as the center frequency which is in the middle of the SSB portion of the 2 meter band and according to the program has a gain of 11.68dBi with a front to back (F/B) ratio of 37.44dB on a boom length of 8.68 feet with 1/4 inch elements using a standard direct feed dipole insulated from the boom as the driven element with a 3dB beamwidth of aprox 48.7 degrees..

No matching device should be required but due to variations in your construction practices, some trimming of driven element may be needed or us a gamma match with non-split (not insulated from boom) solid dipole driven element for best SWR.

Reduced Size Broad Elevation Verticals

Here is a radical new design for wire vertical antennas. These two designs are true selfcontained verticals that are reduced size but still have high performance. My RSBEV's (Reduced Size Broad Elevation Verticals) have an unusually broad elevation pattern this improves short range communication quite dramatically for example by top hat version covers from 9.2 degrees to 60 degrees minus 3 dB that is a total range of 50.8 degrees.

10 m J-Pole vertical

This 10m design uses a coaxial cable matching section with a wire vertical element supported by a fibreglass pole.


This antenna should be considered EXPERIMENTAL! Most builders who have atte
mpted to build it, report difficulties! More research by builders is needed on it's proper design!

The antenna was named for W4JRW who invented it and holds a patent on the basic principle and uses quarter wave stubs, which act as insulators at the frequency for which they are cut. For example, the 6'11" stub (quarter wave times the velocity factor 0.8 of the feed line used) blocks RF for 28 mhz from reaching the rest of the antenna.

ON7YD Vertical antenna with inductive toploading

In an environment with a lot of 'vertical objects' (trees etc.) close to the antenna inductive toploading can significantly increase the performance of a short vertical antenna. The antenna is 14m high at the right end (where the loading coil is) and 16m high at the left end. The horizontal top section is 22m long and consists of 4 parallel wires, each 90cm separated.

20-Meter J Pole Vertical

No radials to mess with, completely grounded and a low angle of radiation. What's not to like?

Off-centre fed bent element attic yagi

This is a horizontally polarized three Element Yagi. Only 8ft. 5" wide and 7ft. 6" long and still has 6.2dbi gain and 20db front to back ratio.

Top loaded vertical for 160 meters

This is a 90 foot tall top loaded vertical for 160 meters. It is constructed from aluminum irrigation tubing and has four sets of four guys each. The top guys also serve to support the top load wires. It has a "temporary" wire stub about 68 feet long hung off the side
to provide operation on 80 meters. More details are pictured below.

The G4ILO Wonder Loop

The G4ILO Wonder Loop is an inexpensive, easy to make magnetic loop antenna that covers five HF bands, 40m through
15m. It is designed for portability, and can be assembled or disassembled in about a minute. When disassembled the
antenna easily fits in a suitcase or backpack.

DK5PT's compact ferrite loading coil for LW antennas

The air-gap Variometer. What I am using for LF antenna matching is a relatively small ferrite pot-core instead of big coupled air coils. Pot cores are primarily used for power transformers in switching supplies, not usually for high Q coil applications. The core is a SIEMENS PM74/59 with 74mm diameter. The ferrite is N27.

G5RV 40m Beam Antenna

Adding a 28 ft. piece of vertical wire to one end of a traditional 102 ft. centerfed G5RV dipole turns it into a 40m beam with a very wide beamwidth.

3 4 and 5 Element yagi designs for the 10m 12m 15m 17m and 20m Bands

Monoband 3 to 5 elelment yagi designs

7 elements Yagi for 144 Mhz

A simple 7 element Yagi with 3.7 m boom length for the lower portion of the 144 MHz band. It exhibits a forward gain of
11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/B is about 12.5 dB.

4 6 and 8 element Beam designs for 6 Meters

The 8 element is an absolute monster - 41 foot boom - mounted at 87 feet giving 14.0 dBi gain


The VE6WZ QTH is a small city lot so achieving gain on 80m has been difficult. Good DX results have been experienced using the Force1
2 EF180B 80m rotatable dipole at 100' so it was decided to design a 2 el 80m yagi around similar elements. The VE6WZ yagi design uses high Q mostly air core loading coils instead of the linear loading on the 68’ elements. Because of dimensional constraints at the VE6WZ city QTH a 28’ short boom reflector design was built with the 2 el 40m yagi sharing the same boom.

SM0DTK 40 meter Moxon

On my lot I have some pretty high trees (15 meters) which can carry wire antennas. So what antenna to hang up to get some gain to the west and to reduce signals from the east? My choice was to try a moxon wire antenna made by very thin wire to reduce weight. I started up the Moxon Rectangle Generator and calculated the dimens
ion for the antenna. Then I cut the wire according to the result from the generator and made some supports for the corners and for the feeding point by plexiglass.

Constructing a LowFER Antenna by Robert Bicking, W9RB

Getting on the air with a LowFER station is more complicated than getting on the ham bands since commercial equipment isn't available and construction is involved. The "RB" LowFER antenna is 31 feet tall with a 24 foot diameter top hat. At 186 kHz, the antenna primarily looks capacitive with a small resistive component con
sisting of the radiation resistance of the antenna in series with the loading coil resistance and the ground resistance.

160m and 80m Coaxial Receiving Loops

W7AE built the first loop for 160m following plans laid out in the ARRL Antenna Handbook. Encouraged by the results I built one for 80m. I found that with a proper preamp such the Palomar series or Ameco's PT3 there was a significant lowering of noise but the signals that I was unable to hear on my sloper now were quite workable using the receiving loop. For the past several years we experimented with several different configurations including a circular and
square loop. We found that the diamond configuration worked the best. The 80m version requires a preamp to bring the signal up to an acceptable quality.

Magnetic loop antenna for 80m to 20m

Construction plans for several small magnetic loop antenna designs

80m Short Dipole

The best antenna is the simple Dipole. If you have height, you even can put up a quarter wave vertical or an inverted L. Both of these antennas need some form of radials for reasonable performance. But, including my self, most of us do not have enough space for 132 feet full size 3.5Mhz dipole, or space for few 66 feet radials.

A compact 2 element beam for 10M

Bamboo canes, gaffer tape, wire elements - keeping costs in check in the best ham tradition.

Petlowany Three-Band Burner Antenna

Fundamentally it's a quarter wave ground plane with 4 radials cut for 15 meters. The interesting twist is the spiral coil "hat" on top, which makes the antenna resonant on 20 and 10 meters as well.

The 2 Meter Colinear J Pole Antenna

Get ready for field day, mountain topping, emergency communications, roaming or just plane ham radio fun with this portable inexpensive 2 meter J designed to fit into a small foldup space that yields about 8db gain. Support it from a non-conducting collapsible fishing pole or similar.

Building the G3TXQ Broad Band Hex Beam

This site provides guidelines to build a G3TXQ broad band hex beam R.F. antenna for the five amateur radio bands, 20, 17, 15, 12 and 10 meters. The G3TXQ broad band hex beam is a new development and actually
easier to build than the older classic hexbeam.


This project will enable you to build a monoband long wire inverted vee with 3/4 wave length sides that will have a bit of gain, for high band operation and long distance compared to a st
andard 1/2 wave dipole because of its lower vertical angles of radiation, and added leg length. The longer the leg lengths in odd multiples, the more the gain. It amounts to a very low cost and effective antenna. It is also less directional than the horizontal dipole or straight long wire antenna.


After assembling a two element Quad, Mario (IK7ZCQ) needed an antenna for 17 and 20, so he asked me to build a 17/20 dipole; I hate rotary dipoles and traps.. but why not try it?

80/160m Small Receiving Loop

I live in an apartment complex with 980 units, all of which are outputting som
e electrical noise. This makes copy on the low bands very hard. A small receiving loop helps; it has very deep nulls and makes listening on 80 and 160 more pleasant.

The Kite and Balloon Antenna Site

Kite and balloon lifted antennas for Top Band and higher from YB5AQB (Plus YI9CC and 9M2/G4VGO)

Vertical antenna for ham radio - 40 meter ham band

Spanish article. Extract from Babelfish translation...

This self-supported vertical antenna was made with aluminum tubes of 3 ms in length that have an External to diameter of 32 mm and to wall thickness of 1,2 mm total The length of the radiating system is 10,33 ms and its square-shaped bases measures 25 cm on to side.

Hex-Shaped 160 Meter Receiving Loop

This is a shielded loop constructed from 24 feet of 0.405 inch diameter coaxial cable and resonated at 1.850 MHz with approximately 350 pf of capacitance. A trimmer capacitor adjusts the resonant frequency and a ferrite-core transformer is used to step up the low loop impedance to match 50 Ohm transmission line.

Small Transmitting Loop Project

A walk-through of experiences building loops. No spreadsheets, calculations, theoretical formulae, etc. Includes links to
the more interesting ones at the bottom of the article. More practical experiences, and some of the "Ah ha!" moments
of the project.

14-30 MHz Magnetic Loop Antenna

Construction of a Compact and Efficient Portable High Frequency Antenna.

The small magnetic loop antenna is a compact efficient antenna that is ideal for portable deployment or for limited
spaces and that can be improvised inexpensively. The antenna is essentially a tuned circuit with an inductor formed by
a loop of wire measuring less than 1/4 wavelength and resonated to the operating frequency with a capacitor.


This is a prototype and it is not a lightweight antenna.

I erected the antenna on a 9 meter test tower at my mother's home. The trial began. With only a few adjustments of the feed point on the driven stub, the antenna analyzer showed a close to perfect match, with overall SWR less than 2:1 over 130 Khz! The same operation was performed to optimize the rear F/B.


MiniBeam. Construction based on 4 20m Hamstick style whips.


Uses 20mm electrical PVC fittings - a tee-piece, two couplings, two 160mm lengths of pipe and another short length of pipe which plugs into the teepiece and is used to fasten the beam on a mast.

The elements are mounted in the two couplings which plug onto the two short lengths of tubing and these, in turn, plug into the tee-piece. Elements are made from 3mm brazing rod.
Measured SWR on this antenna is 1.3:1.

DF9CY Three-Element Antenna for 28 MHz

The 3 element is a commercial antenna by PAN International, which I slightly modified for good performance on the 10m Amateur-Radio band.
Design Frequency: 28.300 MHz

* Usable Bandwidth: 600 kHz
* Return loss: better than 20 dB with center at 28.270 MHz
* Gain: > 7.5 dBi
* Front/Back ratio: > 20 dB

M1PAF 20 Meter Vertical Moxon

The antenna worked exceptionally well adjacent to the ocean and as a result we managed over 4500 QSO's in 6 days with Japan and Asia contacts coming very easily with our 100W.




In log-periodic dipoles, it was found that forward tilt increased gain by a 3 to 4 db over a regular log dipole.

QUAD (2 EL. FOR 10-12-15 MT)

Diamond configuration which gives just 0,1-0,2 db more in the gain than Square configuration. Square-aluminum boom 30*30*1 mm 180 cm length with steel pipe insert.

The spreader to boom attachment (one for each element) is home-made using a square-steel bar (35 cm length); on the tips there are 4 perpendicular pipe (25 mm diamet
er) where you'll insert poles.

Poles are 5 m length (21 mhz); I use four 240 cm bamboo poles for each element 240 cm length made longer using a short aluminum pipe (25 mm diameter, 100 cm length) as the lower section.

KE4UYP TopFed 3/4 Wave Linear Loaded Vertical For 80M

This is a vertically polarized Phased array. The left Vertical wire is 180 degrees out of phase with the middle and right Vertical wire. At 1/6 wavelength spacing from the right Vertical wire to the left Vertical wire it is producing a EndFire Bidirectional Pattern that developes a Gain of 5.9dBi.

In addition Enhancing this Phased array is th
e 1/4 wavelength horzontally polarized radiator (counterpoise) Located at the feedpoint an note it is at the top of the array giving you a almost Totally Omnidirectional pattern of high wave angle horzontally polarized Radiation.

All of this and it is working at 95% efficiency.
And a 300khz bandwidth under 2:1 SWR.


There we have it, no fuss, no rats nest of wires, just a beam on an extra band with the addition of a few components. I'd recommend using a variable capacitor for the load and tweaking it if you want the best 17m performance.


I have/had a HYGAIN 4 element 17 meter monoband yagi (26 ft boom) and converted this to a 20 meter moxon by attaching wires between the driven element and the reflector (keeping the spacing between the wires per moxon calculator).

2 Meter 5/4 Wave Antenna

This antenna is unique in that it is enclosed entirely in 3/4" PVC which makes the design a little more complicated. The primary problem is that PVC tubing has a significant velocity factor which causes RF to slow down. This means that an antenna encased in PVC will normally need to have it's physical length reduced by about 19%. To further complicate the design, a 5/4 wave antenna's impedance has a highly inductive component which must be tuned out to get a good match. Fortunately, this design solves all of those problems.

17 Meter Reduced Size Coaxial Moxon Rectangle

If you have tried the Moxon Generator program to design a Moxon Rectangle, then you are familiar with the Moxon antenna. For those of you who are not familiar with the Moxon, it resembles two letter "U"s with the open ends almost touching but is squ
ared off at the bends. One director and one reflector, each with tails pointing at each other. This antenna can achieve a respectable gain of about 3 to 4dbd and good front to back ratio and is usually made from wire or small diameter tubing. It is usually designed and operated on the higher Hf bands due to physical sizes of Hf antennas on the lower bands.

K4TX 40 Meter 2 Element Parasitic Delta Loop Switchable NE/SW

The Delta Loop array used at my QTH is a simple and inexpensive way to achieve substantial gain and reasonable F/B ratio. I took the idea from Dave Pietraszewski K1WA's article
in the ARRL Antenna Book when he wrote about 5 Sloping Dipoles suspended from a single tower. The sloper parasitic array he described had an ungrounded coax switch mounted in the tower. He used 3/8 electrical wavelength feedlines to each element. He would transmit with a single sloper & the other ones acted as reflectors. Why? Because the 3/8 wavelength feedline going to the other slopers (each being open circuited due to the ungrounded coax switch) added inductance making the element appear 5 % longer thus acting like a reflector.


Simple, but very serious antenna. Work like thunder, just go to 14 MHz, and hear YT9A signal. Antenna is cheap,
You need: 2 AL pipes 40 x2 x5.000, 1 AL pipe 40 x 2 x 2.000mm, 15m 6mm rope, 50m 2mm rope, 50-60m copper wire in PVC, cable-tie's, 2 x M6 x 40mm screw's, PVC tape and one empty plastic bottle of 5L for balun holder

The Slingshot Antenna for 2 Meters

The completed antenna is bi-directional with a rough figure 8 pattern and is composed of 2, 3/4 wavelength sections of electrical conduit bent and cut to the lengths in the drawing and supported as shown on any
type of insulating material attached to the mast with whatever arrangement of bolts, nuts, clamps, etc.

A Hexagonal Beam in 3 hours..

1. The HEX has a very small wingspan BUT....NO LOADING COILS OR TRAPS!! (Therefore it does not have the losses associated with such devices)
2. It appears to perform much as a full size 2 element yagi but with a better match to 50 Ohm coax comparable gain and f/b but with a bit less bandwidth
3. Physically it is very light and strong. It can be multibanded by nesting elements one inside the other like a multiband Quad.
4. As it is hexagonal in shape it has no bias in windy conditions so a very small rotator is sufficient.

This antenna seemed to me to b
e a good contender for two different types of Ham..
Number one is the guy who has a small lot in a town or city... He probably needs an effective multiband beam that both he AND the neighbours can live with.
Number two is the guy who has lots of space has good HF beams already (20M thru 10M) and perhaps needs something for 30M 40M and even 80M

Stations that I spoke to who were using this antenna appeared to be very happy with the performance and as I could observe about 5 S points f/b ratio on most of their signals I was hooked...! I decided one Saturday morning to build a monoband 17M Hexagon just for evaluation purposes

20 Meter Circular Magnetic Loop

Circular magnetic loop built with a copper tube (outer diameter 14mm, thickness 1mm). The overall diameter is more or
less 1m

A Quick and Simple 2 Meter Ground Plane Project

If you are just getting experience in building antennas or you are an old pro, here is a simple and fun project! This antenna is perfect for those hams living in the primary coverage area of the repeater for 2 meter use.

This antenna is nothing more than the old standby "Droopy Groundplane" and can be used on any band where it's physical size does not pose a problem. Remember that the vertical radiator is 1/4 wavelength long at your operating frequency.

It has no gain but makes an excellent small antenna that can be mounted just about anywhere and with a little planning, can be used mobile on a short mast from the bumper!! Adding a small attachment loop at the tip of the radiator will enable it to be suspended from above for inside use.

AF4AR W6ARQ KC5BBP 2 Meter Square Loop


Here are the building instructions on the 2 meter square loop. Credit is given to K0FF for most of this design.
We have added modifications that proved useful in the design. The mods will be presented under modifications in the design instructions. Special thanks to W6ARQ and, KC5BBP for thier input on this Antenna.

Fresh search

  3 Responses to “Antenna search results”

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  3. Well, since you invited it…

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    I also hate excessive poor literacy, though I try (and it’s hard) not to judge – there are so many possible explanations – so I, for one, think you can safely disregard the above advice :-)



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