X-band frequency selective limiter using absorptive notch filters embedded multiplexers

Wideband receivers are becoming more widely adopted as RF systems become more multi-function. These wideband receivers are susceptible to interference from jammers or from co-site interference and mitigation methods are necessary. We present the design and development of a RF Channelizer with embedded tunable absorptive notch filters for the precise excision of undesired signals. Our prototype covers the X-Band from 5.9-12.8 GHz in 5 contiguous channels, and employs an embedded tunable absorptive notch filter in each channel. Our topology demonstrates more than 33 dB of jamming suppression over a 170 MHz bandwidth.