On 6/18/2014 5:05 PM, qrv@kd4e.com wrote:
Elk doesn't appear to offer a log-periodic:
http://www.elkantennas.com/shop/
But their prices are competitive with Arrow.
Each of the three antennas shown on that page is an LPDA, the first
providing dual-band coverage and the others single-band coverage. Notice
the dual booms and the fact that each element is split at the center and
driven out of phase with neighboring elements via transposed attachment
points. The dual bander uses the fact that the 70cm frequencies are
roughly three times the 2m frequencies and resonate in the 3/2-wave
mode. These antennas are usually feed via a balun at the front (higher
frequency end) of the array.
However, none of these is a continuous wide-range LPDA type that you may
be looking for, possibly covering 50 MHz (or 140 MHz) to 1300 MHz.
You'll need to look to Create, Tennadyne, and other manufacturers for
these, or make your own.
Gus Hansen
KB0YH
PS: My homebrew 10-20m LPDA is shown on my QRZ.com page. Your UHF/VHF
LPDA would be much smaller!
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