[amsat-bb] Re: J-Pole Antenna
kc6uqh at cox.net
Sun May 12 21:22:13 PDT 2013
You are correct, a J Pole is an end fed dipole on its side. Max gain at the
horizon and extinction at 90 degree elevation. The J section is for matching
and does not radiate. Gain = 2.1 dBi at the horizon.
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Jeff Moore
Sent: Sunday, May 12, 2013 10:48 AM
To: amsat-bb at amsat.org
Subject: [amsat-bb] Re: J-Pole Antenna
I wouldn't recommend a J-pole for satellite work unless you expect to
only work sats on the horizon. The J-Pole antenna has a low take-off
angle and almost NO radiation overhead, an plain 1/4 wave ground plane
antenna would work better for the sats.
J-poles are great terrestrial communications antennas, not so much for
working overhead satellite passes. An Eggbeater or quadrifiliar antenna
would be a better choice.
Jeff Moore -- KE7ACY
On 5/12/2013 8:00 AM, Werner, HB9BNK wrote
> Thank you all for your valuable hints and advices !
> I will now build such an antenna and then supply here the results.
> 73 Werner, HB9BNK
Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB