Novel Dual-Mode Dual-Band Filters Using Coplanar-Waveguide-Fed Ring Resonators

• Published in: IEEE transactions on microwave theory and techniques Vol. 55; no. 10; pp. 2183 - 2190
• Main Authors: Xiu Yin Zhang, Xiu Yin Zhang, Quan Xue, Quan Xue
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Band pass filters; Bandpass filter; Bandwidth; Circuit properties; compact size; Degrees of freedom; Dual band; dual mode; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; Feeding; feeding structure; Feeds; Frequency; Frequency filters; Joining; Mathematical analysis; Microstrip resonators; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwaves; Optical ring resonators; Oscillators, resonators, synthetizers; Passband; Q factor; Quality factor; Resonator filters; Resonators; Specifications; Tunable circuit; Waveguide resonator; Q factor; dual band; dual mode; compact size; feeding structure; Compact design; Specification; Selectivity; Microstrip resonator; Implementation; Mode filter; Bandpass filter; Ring resonator; Coupling coefficient; Antenna feeds; Band pass filter; Coplanar waveguides; Passband

This paper presents a novel approach for designing dual-mode dual-band bandpass filters with independently controlled center frequencies and bandwidths. Two microstrip perturbed ring resonators are employed to obtain dual-mode dual-band responses. Novel feeding structures are introduced to simultane...