Jeff, 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.
Art, KC6UQH -----Original Message----- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Jeff Moore Sent: Sunday, May 12, 2013 10:48 AM To: amsat-bb@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. 7 3 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@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 _______________________________________________ Sent via AMSAT-BB@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
