IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
Cross-coupled bandpass filter based on circular substrate integrated waveguide resonator
Sheng ZhangHai-Ting WangJia-Yu RaoXue-Dong FuFa-Lin Liu
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JOURNAL FREE ACCESS

2016 Volume 13 Issue 22 Pages 20160953

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Abstract

In this paper, circular substrate integrated waveguide (CSIW) filters are presented. Π-shape slots etched along the electric walls of the CSIW on the upper layer are proposed firstly, which enhance the magnetic coupling parameters between two CSIW cavities. Meanwhile, S-shape slots as the electric coupling structure are firstly used on CSIW filters. With both magnetic and electric coupling, the third-order and fourth-order cross-coupled bandpass filters based on circular substrate integrated waveguide resonator (CSIWR) are designed, which possess one transmission zero (TZ) and two transmission zeros, respectively. Measured results of these filters with a high selectivity agree well with simulated ones.

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© 2016 by The Institute of Electronics, Information and Communication Engineers
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