Brooke Clarke wrote: > Hi Matthew: > > Some antennas are receptive to signals coming up from below. > > Since the signal is circularly polarized the first reflection is supposed to > be > down something like 20 dB, but the second reflection will be much stronger, > so > you would also need to look at those. > > Have Fun, > > Brooke Clarke > Brooke
The interaction between the antenna and the roof is a near field problem and its more complex than one may at first suspect. To achieve reasonable accuracy you need to either measure the effects or use EM modeling techniques. Bruce _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
