volume | PIER Journals

Abstract

A new defected ground structure (DGS) with two transmission zeros is presented for the first time by loading the conventional dumb-bell-shaped (DBS) DGS with the comb-shaped structure. Equivalent circuits are developed and electric parameter extraction is derived. The low-pass filter (LPF) design method based on the proposed new DGS is given. The fabricated filter demonstrates a sharp, wide and high stopband rejection with an ultra-wide 20 dB rejection bandwidth of 21.9f_c and the sharp attenuation rate is more than 129.4 dB/GHz.

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Mr. Junbao Du

Dr. Chuan-Min Wang

Dr. Lin Li

Dr. Xian-Chuang Su