The other issue that many loop? experts dont want to accept is that for a the typical 1 metre? to 2 metre loop size? the antenna factors cant be improved to the point where it drops the inherent amplifier or system noise floor.
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If the ultimate objective is a better signal to noise ration then a better antenna design should be pursued rather than making miniscule changes in loop amplifier design that does not change? noise or floor antenna factor by much.? Then again I am not surprised because even the likes of the FCC, OFCOMM and several other regulatory agencies use measuring loop antennas whose? noise floor is higher than the noise that they are trying to measure.? They just dont want to get it!
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The only thing that will improve antenna factor? to get a better signal noise ratio for a 1? to 2 metre loop size is to implement a tuning/tracking system that gives anything from 6 to 10 db improvement. The only professional company that "gets it" is R&S whose model? HM525 loop has a tuned or amplified mode that results in a substantial signal to noise floor improvement that allows noise measurement? or signal reception close to ITU rural noise levels.
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So I question the value of pursuing the miniscule improvements in pursuing? minor amplifier and transistor improvements beyond what is necessary for the antennas antenna factor that it will be used in. It seems to be an exercise in futility when the majority want to use a small 1 to 1.5m loop diameter.
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When someone develops a loop antenna amplifier and small loop? antenna that improves 10db over the existing 1 metre designs I will take notice. That is not to say that all this research and? endeavour is not technically interesting? because it does advance everyone's technical understanding which is great. Ultimately it comes down to antenna factor that nobody wants to talk about!
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Henry
