Homebrew 20m 14 MHz antennas for amateur ham radio

 

This is a list of designs for any type of 20m 14 MHz homebrew amateur antenna

To refine your search to show only vertical, loop, wire, portable, multiband etc. click refine search for homebrew antennas


Showing matches 1 to 52 of 52

The K4JPE/R Vertical

The goal, One Anten
na, 10 Bands, 10 - 12 - 15 - 17 - 20 - 30 - 40 - 60 - 80 - 160 Meter.
Upon initial testing, very good results.



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.



A six-band, HF Windom antenna

This Windom antenna was marketed in the late 70's and early 80's as Smithe's Windom.
It was designed to cover 80, 40, 20 15, and 10 meters. By serendipity, it also covers the 17
and 2 meter bands.



THE DOUBLE BAZOOKA 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.



9 band vertical HF antenna

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



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



10-80m MOBILE HF MULTIBAND ANTENNA PROJECT

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.





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.



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 o
ne in your hip pocket), this antenna works! It has been used by K3MT in various installations for more than 10 years.

Read on - and listen to the "experts" telling you that this is hogwash, that an antenna like this can't work. But it does. And true experts, who have taken a decade or more to come to grips with the intricasies of Maxwell's Math, know why it works.



Phil Salas AD5X 40 through 6 meter HF Portable Antenna

Simplified and improved design from that published in the July 2002 QST. Now an aluminium tube design which is lighter and more compact tan the original.





Eight Bands On One Coax - The Windom Antenna

Requirements for my new antenna were simple: It had to have as many bands as possible on one coax. It had to be something I could BUILD myself (even though I'm getting really lazy in my old age, I still can't force myself to BUY a wire antenna - if I get to the point where the only option left is to buy wires from Gordon West, then I think it's time to hang up ham radio forever). It had to fit in my back yard (140 feet wide at the widest point and full of nasty short scrub oak trees).



160-10M Sturba Curtain

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



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.



FULL WAVE LOOP ANTENNA

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.



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.



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.

Performance
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..



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.



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;



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.




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 RXO unitenna

Wide band vertical antenna for 40 to 15 meters band



The LA1IC COAX-FED SLOPING LONGWIRE

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



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.



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.



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.



5 BAND LOG PERIODIC DIPOLE ARRAY

The unique feature of the Telerana is that the elements are wire instead of aluminum tubing which makes for a light weight LPDA (log periodic dipole array). The array is suspended within a framework made of fiberglass poles emanating from a central hub with the ends tied together with light weight rope around the perimeter.



3 HALF WAVE LENGTH HORIZONTAL VEE

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.



Endfed 20/30 Mtr Antenna

I've had good luck with an endfed antenna on 20 and 30 meters. Depending on available trees/supports I can arrange this antenna as an inverted vee a sloper or a horizontal 1/2 wave.



MULTIBAND ONE ELEMENT VEE BEAM BY LA0HV

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).



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

Monoband 3 to 5 elelment yagi designs



BUILD THIS MULTIBAND FAN DIPOLE FOR ALL BAND HF ANTENNA EXCITEMENT

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.



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.



Mike Villard's Magic Anti-Jamming antenna for shortwave reception

Here's a neat little antenna for
receiving on shortwave - that is, HF - frequencies. It's the brainchild of Mike (aka Dr. O. G.) Villard, Professor Emeritus of Stanford, founding father of SRI Inc, and one of the most wonderful colleagues with which it has been my sheer pleasure to be associated.



A Pyramidal Antenna for 14-30 MHz

It looks and works in much the same way that a standard lp antenna works, with one big difference: the two halves of the transmission line are separated and positioned as a V, so each half of the transmission line is in effect a single wire transmission line. Despite the fact that the two halves are separated, radiation from the transmission lines is negligible, contributing a small cross-polarization component to the pattern.



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.



Feeding a G5RV

The essence of a G5RV is a dipole that is 3λ/2 long at 14.15MHz, fed by a λ/2 balanced line "matching" section (approx 520 Ω Zo) and an arbitrary length of coax or low Zo balanced line to a tuner. Varney's articles suggest that an inverted-v configuration of the dipole legs is acceptable, though he recommends the included angle should be greater than 120°. (Varney did also describe a configuration using only open wire line of approx 520 Ω Zo, but that configuration is not nearly as popular as the high Zo / low Zo combination.)



A Portable 2-Element Triband Yagi

Have you ever dreamed about a portable beam you could use at your summer cottage, while camping or on Field Day?
Dream no longer. This portable beam can be rolled up and stashed in your car’s ski boot!



THE LATTIN 5 BAND ANTENNA

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.



A ROTARY DIPOLE FOR 17 AND 20

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?





20m Delta Loop

Fed for vertical polarisation, to give a low angle of radiation for DX and also a nearly omni-directional radiation pattern.



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.



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.



CENTER-FED MONOBAND INVERTED LONG WIRE VEE

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.



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.



SM0DTK 20 Meter Corner Fed Vertical Moxon

Vertical Moxon wi
th different feeding.



20-Meter J Pole Vertical

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



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.



N3OX DUAL BAND MOXON 17&20 Meters

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.



MINI HORIZONTAL "V" 2 ELEMENT "HAMSTICK" 20M BEAM

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



YU1QT 5 ELEMENT 20 METER MOXON

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



KH6CB 4 ELEMENT HYBRID MOXON

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).



PA0RDT Mini Whip

Compact wideband active antenna.

Claimed effective from 10kHz to 30MHz

Specifications:
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

Dimensions:
Length: 100 mm, diameter: 40 mm


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  One Response to “Homebrew 20m 14 MHz antennas for amateur ham radio”

  1. Thanks for the good antenna articles. Very helpfull. Best greetings. Gerd DU1SPQ

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