2m 144 MHz Antenna List
 

This is a list of any type of 2m 144 MHz antenna

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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 stations 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 dipole.


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 late 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.


VHF / UHF Direct Connect Beams

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


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

The 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.


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 with 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..


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.


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".


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