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#11
April 11th 09, 03:51 AM
posted to rec.radio.amateur.antenna
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Dish reflector
Art Unwin wrote:\
Tom I asked the question as I am not personly knowledgable about dish style reflectors. I do read a lot and I read a paper once where it was found that a cone shaped reflector produced increased gain when used with a helix antenna, so I made one to try it out. Personaly I see it more as a horn and not as a dish with a radiator at a phase control difference from the reflector? Either way I do not understand how that I can hear signals to the rear if the reflector envelope encloses the radiator thus the question. Note that a helix radiates differently from the normal dish radiator such that phasing does not enter the design which is why you see planar dishes or "cups". Thus questions with respect to reflector diameter are not pertinentwhen the radiator is enclosed. He is _awfully_ funny, isn't he? tom K0TAR |
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