Single-pole double-throw switchable diplexer and single-pole quadruple-throw switchable quadplexer using capacitively loaded multicoupled line

• Published in: IET microwaves, antennas & propagation Vol. 9; no. 14; pp. 1547 - 1557
• Main Authors: Chen, Chang-Sheng, Lin, Yo-Shen
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 19.11.2015
• Subjects: bandpass filter; Bandpass filters; band‐pass filters; capacitive loaded multicoupled line; common resonator technique; coupled transmission lines; Diplexers; insertion loss method; Microwave antennas; multiplexing equipment; Radio frequencies; Resonators; Selectivity; signal path; Signal paths; single‐pole double‐throw switchable diplexer; single‐pole quadruple‐throw switchable quadplexer; SPDT radio frequency switch function; SPDT switchable diplexer; Switches; insertion loss method; bandpass filter; coupled transmission lines; single-pole quadruple-throw switchable quadplexer; resonators; SPDT switchable diplexer; band-pass filters; capacitive loaded multicoupled line; common resonator technique; SPDT radio frequency switch function; single-pole double-throw switchable diplexer; signal path; multiplexing equipment
• ISSN: 1751-8725; 1751-8733; 1751-8733
• DOI: 10.1049/iet-map.2015.0035

Compact switchable diplexer and quadplexer are proposed using the capacitively loaded multicoupled line and the common resonator technique. The proposed single-pole double-throw (SPDT) switchable diplexer integrates the functions of SPDT radio frequency switch and bandpass filter, and each signal path can be independently synthesised using the insertion loss method. In addition, by a simple modification to the common resonator, a single-pole quadruple-throw switchable quadplexer can be achieved by the connection of two proposed SPDT switchable diplexers. Low-loss, compact size, good selectivity, and high-linearity are achieved.