[amsat-bb] CP antennas VS non CP antennas

Joe Werth jcwerth1 at yahoo.com
Mon Feb 5 00:27:10 UTC 2018

Scott, KA9P has done some linear vs circular comparisons.  You might email him and get his perspective.


Sent from my iPhone

> On Feb 4, 2018, at 5:08 PM, jim at beeson.cc wrote:
> I have been licensed since 1966. I have fond memories of working LEO satellites like RS12/13, RS15, etc. but have not done any satellite work since the failure of AO40. The number of new LEO sats has
> encouraged me to get back in the game so I pulled out some equipment & checked it out and am ready for the antenna. Sorry for being so long-winded but I thought a little history was in order so you would understand what I am about to ask. I know what circular polarization is and why it is used.
> My question is, has there been any study or article or some real life actual experiences comparing CP antennas VS non CP antennas on the birds we currently have available? I have small antennas that have 70 cm & 144 Mhz in the same plane on one boom. Do you think it is necessary to go to the
> time and expense to get a CP antenna (70 CM/144 Mhz) of either on the same boom or even more expense of a separate 70 CM CP antenna and a 144 Mhz CP separated on a longer boom? Thanks in advance….  
> Jim
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