Homebrew 2m 144 MHz antennas for amateur ham radio

 

This is a list of designs for any type of 2m 144 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 24 of 24

THE HENTENNA

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.



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.



2 METER DIPOLE ANTENNA

Construction notes for that most basic of antennas a dip
ole.



VHF / UHF Direct Connect Beams

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



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.



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..



CT1EUB 2 METER MOXON

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.



7 Element Yagi for 2 meters

Th
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.



THE J BEAM FOR 2 METERS AND UP

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.



Ladder Line 2 Meter J-Pole

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



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".



2 METER SSB YAGI PLANS FOR SIDEBAND FUN

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.



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.



J Pole antenna for 2 meters

The J Pole, or J Stick, antenna has a reputation for being easy to make. Some constructors say it also has a reputation for being difficult to tune and match. So long as you build carefully then during tuning and matching, only change one parameter at a time, it is a friendly and accommodating aerial.



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)



K3MT presents . . . The Quad and The ModQuad

Here's some thoughts on a "hardware-store special" 2-meter quad, and a modified quad for 2 or 10 meters. You can convert these to other frequencies simply by scaleing all dimensions according to wavelength. That is, to put the 10-meter modquad on 15 meters, just multiply all dimensions by 29.0 / 21.25.



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.



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.



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.



144 430 Mhz portable antenna

Design for a portable J pole



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.



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.



2 meter halo

Design for halo using flat aluminium strip for the loop.



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.


Fresh search

An apple every eight hours will keep three doctors away.


  2 Responses to “Homebrew 2m 144 MHz antennas for amateur ham radio”

  1. thanks, for a well put together site simple and efficient.
    73 de g8nlf

  2. Good page. fianlly found the design I was looking for.

    73 and tnx

    Paul
    kf5pv

 Leave a Reply

(required)

(required)

96 − 87 =