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

Volume

63

Issue

2

fYear

2015

fDate

Feb. 2015

Firstpage

403

Lastpage

413

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;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2014.2381256

Filename

6998873