Compact Balanced Bandpass Filter With Wideband Common Mode Suppression

被引:2
|
作者
Pan, Bosang [1 ]
Zhu, Haoshen [1 ]
Feng, Wenjie [1 ,2 ]
Che, Wenquan [1 ]
Xue, Quan [1 ]
机构
[1] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510006, Peoples R China
[2] Nanjing Univ Sci & Technol, Dept Commun Engn, Nanjing 210094, Peoples R China
基金
中国国家自然科学基金;
关键词
Balanced bandpass filter; double-sided parallel-strip line (DSPSL); compact; high selectivity; common mode (CM) suppression; RESONATOR;
D O I
10.1109/APMC47863.2020.9331608
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A compact balanced bandpass filter with wideband common mode suppression is proposed. Swap structures based on double-sided parallel-strip line (DSPSL) are used to realize 180 degrees phase invert, which can provide an inherent common mode suppression in a wideband, and compared with half-wavelength transmission line in other work, this swap structure greatly reduces the size of the balanced filter and achieve a compact structure. Two transmission zeros are introduced by dual-mode ring resonator lead to high selectivity. One prototype center at 2.2 GHz was designed and fabricated, 3-dB factional bandwidth of 23.6% and over 20 dB common mode suppression extend to 2.91/0. Simulated results are in good agreement with measured results.
引用
收藏
页码:935 / 937
页数:3
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