%0 Journal Article
%A 韩宇南 袁思雨 孙晓昱 梅超凡
%T Design of low-pass filter with 3-interations Koch fractal Pi-shaped DGS
%D 2018
%R 10.19682/j.cnki.1005-8885.2018.0017
%J 中国邮电高校学报（英文）
%P 92-96
%V 25
%N 3
%X A novel asymmetrical Pi-shaped defected ground structure (DGS) with 3-interations Koch fractal curves is proposed to design a microstrip low-pass filter (LPF) with ultra-wide stop-band (SB). The proposed LPFs with a single resonator and two cascaded resonators are both designed, simulated, manufactured and measured. Simulation and experiment results demonstrate that the designed LPF has a very sharp transition band (TB) and an ultra-wide SB performance compared with the existed similar symmetrical and asymmetrical DGS. The proposed LPF with two cascaded resonators is with a compact size of 36.8 mm×24.0 mm, a very low insertion loss of less than 0.7 dB under 1.9 GHz, and a wide SB from 2.2 GHz to 8 GHz with rejection of larger than 30 dB.
%U https://jcupt.bupt.edu.cn/CN/10.19682/j.cnki.1005-8885.2018.0017