Hello Group,
I've just started to play a bit in EZNEC, trying to simulate a receive
loop antenna for the new YV7MAE grabber.
http://dl.dropbox.com/u/74746618/LF/YV7MAE_LF_Grabber.html ... still
using a wire receive antenna with excellent results but now a
directional antenna is needed.
So i modelled a loop with a possible shape and a ground connection. Then
i added a R on the far end of the source. The results of the elevation
and 3D plot are surprising good. Maybe i have done a mistake in
modelling? Optimal performance was obtained at R = 8 kOhm. This resulted
in the best F/B and beamwidth... Results of ZENEC are here:
http://dl.dropbox.com/u/19882028/LF/Cardioid%20for%20LF.png
Any ideas, experiance or advice?
I guess a preamp is needed when such a antenna is used. The typical 1:9
un-un does not look useful for me...
73, Stefan/DK7FC
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