Design of low-pass filter with 3-interations Koch fractal Pi-shaped DGS

doi:10.19682/j.cnki.1005-8885.2018.0017

中国邮电高校学报(英文) ›› 2018, Vol. 25 ›› Issue (3): 92-96.doi: 10.19682/j.cnki.1005-8885.2018.0017

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Design of low-pass filter with 3-interations Koch fractal Pi-shaped DGS

韩宇南¹,袁思雨²,孙晓昱¹,梅超凡¹

1. 北京化工大学
2. 北京邮电大学

收稿日期:2018-02-28 修回日期:2018-05-23 出版日期:2018-06-29 发布日期:2018-06-30
通讯作者: 韩宇南 E-mail:clark-han@139.com
基金资助:
中国国家自然科学基金

Design of low-pass filter with 3-interations Koch fractal Pi-shaped DGS

Received:2018-02-28 Revised:2018-05-23 Online:2018-06-29 Published:2018-06-30
Contact: Yu-Nan HAN E-mail:clark-han@139.com
Supported by:
National Nature Science Foundation of China

摘要/Abstract

摘要： 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.

关键词: low-pass ?lter, defected ground structure, Koch fractal curve, broad stop-band

Abstract: 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.

Key words: low-pass ?lter, defected ground structure, Koch fractal curve, broad stop-band

中图分类号:

TN713.5

参考文献

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Design of low-pass filter with 3-interations Koch fractal Pi-shaped DGS

Design of low-pass filter with 3-interations Koch fractal Pi-shaped DGS

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