Compact Dual-Mode Substrate Integrated Waveguide Coaxial Cavity for Bandpass Filter Design
- 10 May 2016
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Microwave and Wireless Components Letters
- Vol. 26 (6), 386-388
- https://doi.org/10.1109/lmwc.2016.2558651
Abstract
This letter proposes a new compact filtering building block. It consists of two via holes embedded into a substrate integrated waveguide (SIW) cavity connected to capacitive metal patches at the top layer. This topology provides two coaxial modes performing a doublet filtering configuration. The proposed dual-mode SIW coaxial cavity is studied in detail and guidelines for the filter design are given. As will be shown, the proposed building block presents a high degree of design flexibility, which allows for the design of multiple kind of bandpass filter (BPF) responses, including both narrow- and wide-band BPFs along with transmission zero generation. As a verification, several filters are designed and implemented at 8 GHz.Keywords
Funding Information
- MINECO (Spanish government) (TEC2013-47037-C5-1-R, TEC2013-48036-C3-3-R)
- “Juan de la Cierva” Research fellowship
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