Four-port diplexer for high Tx/Rx isolation for integrated transceivers

作者：Konpang Jessada^*; Sandhu Muhammad; Somjit Nutapong; Hunter Ian C

来源：IET Microwaves Antennas & Propagation, 2018, 12(6): 1034-1040.

DOI：10.1049/iet-map.2017.0878

• transceivers
• multiplexing equipment
• phase shifters
• resonators
• four-port diplexer
• integrated transceivers
• back-to-back three-port diplexers
• phase shifter

A four-port diplexer consisting of two back-to-back three-port diplexers combined with a 180 degrees phase shifter in one branch is presented. The technique achieves high Tx/Rx isolation with relatively low degree filters. Two experimental diplexers are demonstrated, one with equal Q resonators in all filters and the other with dissimilar Q factors, enabling miniaturisation and cost reduction. Measured results of Tx/Rx diplexer devices at 2.13/1.73GHz are presented and 40dB Tx/Rx isolation is achieved with only second-order filters.

• 出版日期2018-5-23