16 Mar
2016
16 Mar
'16
4:29 p.m.
Comparing DCA, QFH, Lindenblad and turnstile (eggbeater) antennas : http://www.qsl.net/py4zbz/4ant.htm
All but the QFH show significant (10 dB) nulls all over the place. I'm sorry, I cannot read the language, but does he say anything about these nulls and the height of the antenna over ground? And what kind of ground was used in the model? Perfect or real... or free-space
Since all of the antnnas are multi-element, those lobes could all simply come from the multi elements more or less independent of the ground reflection...
Bob, WB4aPR