[Antennas] 1/2 wave verts
Richard Karlquist
[email protected]
2002年8月18日 20:38:27 -0700
You only get the 2 dB
theoretical gain (and it is 2
dB, not 3 dB) if you have a
huge ground plane (like several
wavelengths)
Rick Karlquist N6RK
[email protected]
www.n6rk.com
www.karlquist.com
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of
> [email protected]
> Sent: Sunday, August 18, 2002 2:55 PM
> To: [email protected]
> Subject: [Antennas] 1/2 wave verts
>>> In my trade (two way radio) we use 1/2 antennas on diesel
> trucks with
> fiberglas roofs. It is claimed the transmit like 1/4 waves
> and have low
> swr. However when they are mounted on vehicles with metal roofs
> (counter poise) the exhibit 3 db. gain according to
> manufactures. My 2
> cents worth, Ron K6ZL
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