A novel simple wideband common-mode suppression filter

作者：Zeng, Zhibin^*; Zhuang, Yiqi; Shen, Zengning; Yao, Yindi; Xiang, Xin

来源：IEICE Electronics Express, 2014, 11(17): 20140582.

DOI：10.1587/elex.11.20140582

• defected ground structure
• common-mode filter
• difference circuit
• insertion loss

A novel compact defected ground structure (DGS) common mode filter is proposed, which adopts only two C-shaped DGS and has only a small size of 7.5 mm by 10 mm. It adopts two-pole structure to achieve wide stopband and adopts method of smooth transition at the junctions of DGS between the slit and the square to improve the depth of stopband. The filter provides over 15 dB common mode suppression from 3.7 GHz to 9.8 GHz, while the differential signals still keep good signal integrity. Simulated and measured results are well agreed.

• 出版日期2014
• 单位中国人民解放军空军工程大学; 西安邮电大学; 西安电子科技大学