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An Inverse S-Shaped Slotted Ground Structure Applied to Miniature Wide Stopband Lowpass Filters
Min-Hang WENG Yu-Chi CHANG Hung-Wei WU Chun-Yueh HUANG Yan-Kuin SU
IEICE TRANSACTIONS on Electronics
Publication Date: 2007/12/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
slotted ground structure (SGS), lowpass, filter, miniaturized, stopband,
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In this paper, an inverse S-shaped slotted ground structure (S-SGS) is proposed and analyzed. The S-SGS generates dual attenuation poles that can be easily controlled by its structure parameters. The equivalent circuit of the S-SGS consists of lumped elements that can be extracted from the measured S parameters. Moreover, several S-SGS cells are applied to form a miniaturized lowpass filter (LPF), which has a smaller area and a wider stopband in comparison to previous works.