Compact Coplanar Waveguide-Incorporated Substrate Integrated Waveguide (SIW) Filter

W. Shen Center for Microwave and RF Technologies, Shanghai Jiao Tong University, Shanghai 200240, China

W.-Y. Yin Center for Optical and EM Research, State Key Lab of MOI, Zhejiang University, Zhejiang 310058, China; Center for Microwave and RF Technologies, Shanghai Jiao Tong University, Shanghai 200240, China

X.-W. Sun The Institute of Microsystem and Information Technology of Chinese, Academy of Sciences, Shanghai 200050, China

J.-F. Mao Center for Microwave and RF Technologies, Shanghai Jiao Tong University, Shanghai 200240, China

Abstract

A novel third-order substrate integrated waveguide (SIW) filter incorporated with a coplanar waveguide (CPW) is presented in this paper. The CPW not only acts as a resonator, but also brings mixed coupling between two SIW resonators. It is shown that the filter has two transmission zeros and wide stopband, which is very compact in comparison with conventional third-order SIW counterpart. Good agreement is obtained between its measured and simulated S-parameters.

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Compact Coplanar Waveguide-Incorporated Substrate Integrated Waveguide (SIW) Filter

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Compact Coplanar Waveguide-Incorporated Substrate Integrated Waveguide (SIW) Filter

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