[amsat-bb] Re: Primestar L Band
bruninga at usna.edu
Thu Sep 28 09:43:28 PDT 2006
> Using 30-in, gain = 24.1 dBi at 2401 MHz
> Using 48-in, gain = 29.2 dBi at 2401 MHz, gain = 23.7* dBi
> at 1268 MHz
> * Note: The smaller dish is too small at 1268 MHz and the
> larger dish may not produce this gain since it < 10 wavelength
> in diam.
I can vouch for that. We just finished a lab where we used some
of the little 1.2 and 2.4 GHz TV cameras as signal sources and
then used a 24" DIRECT TV dishe to let the students measure the
gain between a dipole and the dipole on the dish.
You are correct. There is no meaningful gain at 1.2 GHz. 2.4
GHz gain was striking. I'll wait to see their data before I
commit to how much gain we got at 2.4 GHz.
More information about the AMSAT-BB