Microstrip diplexers design with common resonator sections for compact size, but high isolation

• Published in: IEEE transactions on microwave theory and techniques Vol. 54; no. 5; pp. 1945 - 1952
• Main Authors: CHEN, Chi-Feng, HUANG, Ting-Yi, CHOU, Chi-Ping, WU, Ruey-Beei
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.05.2006; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Band pass filters; Bandpass filter; Bandpass filters; Channels; Circuit properties; Circuit simulation; Circuits; Coupling circuits; diplexer; Diplexers; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; Filtering theory; Frequency filters; Frequency response; microstrip filter; Microstrip filters; Microstrip resonators; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwaves; Optical losses; Oscillators, resonators, synthetizers; Resonant frequencies; Resonant frequency; Resonator filters; Resonators; Simulation; stepped-impedance resonator (SIR); transmission zero; Microstrip filters; Resonator; transmission zero; Multivariable control; Stepped impedance device; Variable frequency; Multichannel filter; Bandpass filter; Simulation; Resonance frequency; Parallel connection; Band pass filter; microstrip filter; Frequency response; Miniaturization; stepped-impedance resonator (SIR); Diplexer

High isolation and compact size microstrip diplexers designed with common resonator sections have been proposed. By exploiting the variable frequency response of the stepped-impedance resonator, resonators can be shared by the two filter channels of the desired diplexer if their fundamental and the...