Title :
Temporal Coupled-Mode Theory and the Combined Effect of Dual Orthogonal Resonant Modes in Microstrip Bandpass Filters
Author :
Faxin Yu ; Yang Wang ; Zhiyu Wang ; Qin Zheng ; Min Zhou ; Dajie Guo ; Xu Ding ; Xiuqin Xu ; Liping Wang ; Hua Chen ; Yongheng Shang ; Zhengliang Huang
Author_Institution :
Sch. of Aeronaut. & Astronaut., Zhejiang Univ., Hangzhou, China
Abstract :
We propose a temporal coupled-mode theory for the design of microstrip bandpass filters with multi-resonant modes and reveals the mechanism of the filters based on multi-coupling and energy conservation theorem. As an example, the combined effect of the two orthogonal modes in dual-mode filters is analyzed in detail. By simply tuning the coupling efficiencies of the two resonant modes, two K-band integrated microstrip bandpass filters have been designed and demonstrate opposite asymmetric transmission responses. Both simulation and experiment results agree well with the theoretical analysis, which provides a new approach for filter design and optimization.
Keywords :
band-pass filters; coupled circuits; microstrip filters; resonator filters; K-band integrated microstrip bandpass filter; dual orthogonal resonant mode filter; energy conservation theorem; multicoupling theorem; opposite asymmetric transmission response; optimization; temporal coupled-mode theory; Band-pass filters; Couplings; Feeds; Filtering theory; Microstrip; Microstrip filters; Tuning; Coupled-mode theory (CMT); dual resonant modes; microstrip bandpass filter;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2014.2381256
