Chin-Leong,
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I meant the series arms of a dummy antenna circuitry ( equivalent of small loop antenna ) should have fixed inductances of value La/2, based on specific untuned small loop antenna. Yes, I realize because? lack of standard and? everyone designs his own - these inductances will have a wide range. For example, LZ1AQ - 1.8 uH each.
IEC 315-1 "Methods of Measurement On Radio Receivers For Various Classes of Emission" standard is unreachable for me and paying $119 for it does not make sense at all.?
I noticed your comments to Martin regarding the coupling factor. I guess, for loop antennae we can not use coupling factors but S21 as a coupling between excitation antenna and receive loop antenna because we should follow certain condition for the distance between antennae in near field? ?2R < distance < Lambda/ 2 Pi, where R is the radius of larger of two antennae. I refer to IEEE Standard on Broadcast and Television Receivers ( IRE-1941-07 ).? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?However, coupling factor can be used when a small excitation loop antenna is mounted directly in a larger loop antenna plane that is more applicable for transmit antennae design.?
Your other comment about 10.7 MHz frequency discriminator where magnetic coupling between coils was ~0.3, it is done for a reason to get a wider linear bandwidth of 250 KHz? between magnetically coupled coils similarly it was done in designing a frequency selective IF of 455 KHz, using three coils( parallel resonant circuits ) with two fixed capacitive couplings between them which later was replaced with quartz filters...
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Regards,
Raphael??
