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V antenna paterns
Ralph Mowery wrote:
Over the years I have seen many patterns for horizontal dipoles and the inverted V antennas,but do not recall seeing any V shaped patterns in the books. That is a dipole that is supported on the ends, but sag in the middle. I know the sag is needed to some extent because of the weight of the wire and feedline, but what happens to the pattern if it is say 1/2 wavelength or 1/4 wavelengths at the ends and the sag in the middle is changed. Maybe drop it a few feet, then 10, 15 and 20 feet for 80 meters. I know that for maximum distance you usually want the high current portions up high,but maybe it will be better as a close in or omnidirectional antenna if the center is lowered somewhat. Download the free demo version of EZNEC and plot it. http://www.eznec.com/demoinfo.htm -- Jim Pennino Remove .spam.sux to reply. |
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