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75M inverted Vee
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October 14th 14, 07:44 PM posted to rec.radio.amateur.antenna
John S
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First recorded activity by RadioBanter: May 2011
Posts: 550
75M inverted Vee
On 10/13/2014 5:40 PM,
wrote:
A quick analysis of a 75M inverted vee with an included angle of about 70
degree shows:
Apex at .5 wavelengths:
Bidirectional horizontal pattern with a front to side ratio of 8.4 db,
vertical pattern a single lobe at 30 degrees and 6.7 dBi gain.
Apex at 60 feet:
Omnidirectional pattern with the vertical pattern showing a gain of 5 dBi
straight up and a gain of 1.5 dBi at 30 degrees and a gain of -1.3 dBi
at 20 degrees.
For comparison, a 1/4 wave vertical which would be about 63 feet tall,
shows a gain of .6 dBi at 20 degrees.
Good info. Thanks, Jim.
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