IEICE Electronics Express
Online ISSN : 1349-2543
Novel Compact Single-Band and Dual-Band Bandpass Filter Based on One-Third-Mode Substrate Integrated Waveguide
Sheng ZhangJia-Yu RaoJun-Jie ChengXue-Dong FuFa-Lin LiuJia-Sheng Hong
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JOURNALS FREE ACCESS Advance online publication

Article ID: 14.20170832

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In this paper, a novel structure of One-Third-Mode Substrate Integrated Waveguide Resonator (OTMSIWR) is first proposed, which reduces about 65% size. Based on the OTMSIWR, a single-band bandpass filter (BPF) operats at 4.55GHz is designed. The single-band BPF has a wide and deep upper stopband. Further, a dual-band BPF using high mode technology based on the single-band filter is designed. The fundamental mode (TM101 mode) and high mode (TM201 mode) are utilized to achieve the dual-band response. The center frequencies locate at the 4.2GHz and 6.15GHz, respectively. Two transmission zeros (TZs) are achieved in the dual-band BPF by adjusting the positions of the feeds. To further improve the selectivity of the upper stopband of the dual-band BPF, two pairs of Complementary Split-Ring Resonators(CSRRs) are introduced on the surface of the OTMSIWR, which obtain the desired results. Finally, a single-band BPF and a dual-band BPF are fabricated and tested. The measured results agreed well with the simulated ones, which proved that the proposed structure is a good candidate to design filters.

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