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Microwaves 2 of 2 (C-band)



Does anyone on the reflector know how to match a helix at the higher 
microwave bands?

I've produced a dish feed using a 4 turn helix but with conventional matching 
it's not reproducable. - The gap between the first half turn and the 
'reflector' is impossibly small.

www.g0mrf.freeserve.co.uk/cband.htm

It should be possible to ground the end of the helix to the reflector and to 
tap the drive somewhere onto the first quarter turn.

Anyone seen this technique anywhere?

73

David  G0MRF

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