Microstrip three-port 4-channel multiplexers using dual-band bandpass filters for wireless applications

Design of four-channel diplexer using distributed coupling technique

“…To extend the application for diplexer design, the circuits with multiband responses for each port were studied . In , a novel phased‐array antenna system with multiband responses, full‐duplex operation, and wide‐beam scanning was developed.…”

“…The microstrip diplexer is designed using periodic stubs that have the advantages of low insertion loss, high isolation and rejection, wide‐band performance on each channel, and easy fabrication. In , the four‐channel diplexer using the coupled SIRs was proposed. By tuning the impedance ratio and length ratio of SIRs, the first two resonant modes can be determined to implement a second‐order BPF with dual‐passbands responses.…”