Dual frequency feed

Details Dual frequency feed Dual frequency feed

H - Electricity

01

Q

351/28

H01Q 1/12 (2006.01) H01Q 5/00 (2006.01)

Patent

CA 1252196

DUAL FREQUENCY FEED Abstract of the Disclosure A dual frequency feed for use with an antenna permits reception of signals in both a low frequency band and a high frequency band and is com- prised of a single feed through which both signals are propagated, a high frequency probe which extends concentrically within the throat of the feed for receiving the high frequency signal, a wave guide connected to the throat of the feed including a pair of turnstile junctions with four wave guides inter- connecting the turnstile junctions, and a single output port with a polarization rotation device for receiving the low frequency signal. The four inter- connecting wave guides may be either co-axial cables or generally rectangular wave guides. The rectangu- lar wave guide version is made from a number of cast aluminum parts and has flanges for assembly, and both versions are characterized by propagating low fre- quency signals of different polarizations through the guide to the same exit port so that a single low fre- quency pick-up can be utilized to receive any of the differently polarized low frequency signals. Other embodiments show different connections both at the throat and at the low frequency output.

497601

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