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By SM2YER Goran / Sweden - October 1999
In this Article I describe My Antenna project,- The dual polarization Quad.
Why dual Polarization?
I chouse this antenna because it gives me an solution to several of my demands of an antenna,- first i needed an directional antenna for working both DX-QSO on the Skip and Long distance local QSO with vertical ground-wave.
The dual polarization Quad-Antenna gives me the following advantages...
High forward gain
Good front to back ratio
Minimum side loob pattern
Both Vertical and Horizontal polarization of the RF-Wave emission
Possible to mount on the same boom
Need of only One Mast and Rotator
...And also some Disadvantages
High Wind sensitivity
Relatively Difficult to tune
Quite expensive to build (Note that I use high quality material)
NOT suitable as the first antenna project for beginners
The antenna is quite heavy!.
Your Antenna Tower/Mast must handle medium to large antennas.
| The QUAD in the SKY!
My QUAD - Assembled and ready for the big TEST-Run,- first some problems with SWR on higher frequencies and then som more problems with the wires in the loops? Read al about it!
I had to do quite some brain exercise before i solved the problem,- and this 'monster' started to give me some Payback!!
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Main construction IMAGES
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