Channelized Receiver-Front-End Protection Circuit Which Demultiplexes Broadband Signals into a Plurality of Different Microwave Signals in Respective Contiguous Frequency Channels, Phase Adjusts and Multiplexes Channels
Patent, Filed 3 Jul 96, patented 17 Nov 98
DEPARTMENT OF THE NAVY WASHINGTON DC
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The invention pertains to a channelized protection circuit for protecting the front-end of a receiver from the detrimental effects of interference signals within the bandwidth of received signals is disclosed. The channelized protection circuit comprises a frequency demultiplexer for separating a broadband input signal into a plurality of different signal components in respective contiguous frequency channels a plurality of signal conditioning sub-circuits respectively responsive to the plurality of different signal components for selectively performing a conditioning operation on the plurality of different signal components to produce a plurality of conditioned signal components minimally affected by interference signals from within any of the contiguous frequency channels and a frequency multiplexer having a plurality of contiguous frequency channels for recombining the plurality of conditioned signal components into a composite conditioned signal of original bandwidth and at a sate power level with a minimum amount of interference. Preferably, the channelized protection circuit also includes a first plurality of phase-adjusting circuits for compensating for phase imbalances among the plurality of different signal components, and also includes a second plurality of phase-adjusting circuits for compensating for phase imbalances among the plurality of conditioned signal components.
- Electrical and Electronic Equipment