A Planar Bandpass Filter Implemented With a Hybrid Structure of Substrate Integrated Waveguide and Coplanar Waveguide

In this paper, a novel planar bandpass filter is proposed, designed, and implemented with a hybrid structure of substrate integrated waveguide (SIW) and coplanar waveguide (CPW), which has the advantages of good passband and stopband performance inherited from SIW and miniaturized size accompanying...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2014-02, Vol.62 (2), p.266-274
Main Authors: Chu, Peng, Hong, Wei, Dai, Linlin, Tang, Hongjun, Chen, Jixin, Hao, Zhangcheng, Zhu, Xicheng, Wu, Ke
Format: Article
Language:English
Subjects:
Applied sciences
Bandpass filter
Cavity resonators
Circuit properties
coplanar waveguide (CPW)
Coplanar waveguides
Couplings
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Equivalent circuits
Exact sciences and technology
Filtering theory
Frequency filters
hybrid structure
Magnetic separation
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
mixed coupling
Planar waveguides
substrate integrated waveguide (SIW)
transmission zero
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Summary:In this paper, a novel planar bandpass filter is proposed, designed, and implemented with a hybrid structure of substrate integrated waveguide (SIW) and coplanar waveguide (CPW), which has the advantages of good passband and stopband performance inherited from SIW and miniaturized size accompanying with the CPW. Additional design flexibility is introduced by the hybrid structure for efficiently controlling the mixed electric and magnetic coupling, and then planar bandpass filters with controllable transmission zeros and quasi-elliptic response can be achieved. Several prototypes with single and dual SIW cavities are fabricated. The measured results verified the performance of the proposed planar bandpass filters, such as low passband insertion loss, sharp roll-off characteristics at transition band, etc.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2013.2294861