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

Author

Peng Chu ; Wei Hong ; Linlin Dai ; Hongjun Tang ; Jixin Chen ; Zhangcheng Hao ; Xicheng Zhu ; Ke Wu

Author_Institution

State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing, China

Volume

62

Issue

2

fYear

2014

fDate

Feb. 2014

Firstpage

266

Lastpage

274

Abstract

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.

Keywords

band-pass filters; coplanar waveguides; poles and zeros; substrate integrated waveguides; waveguide filters; CPW; SIW; coplanar waveguide; design flexibility; electric coupling; magnetic coupling; planar bandpass filter; quasielliptic response; substrate integrated waveguide; transmission zeros; Cavity resonators; Coplanar waveguides; Couplings; Equivalent circuits; Filtering theory; Magnetic separation; Planar waveguides; Bandpass filter; coplanar waveguide (CPW); hybrid structure; mixed coupling; substrate integrated waveguide (SIW); transmission zero;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2013.2294861

Filename

6697903