High-selectivity wideband balanced bandpass filters using symmetrical multi-mode resonators

被引：14

作者：

Feng, Wenjie ^{[1
]}

Che, Wenquan ^{[1
]}

Gu, Liming ^{[1
]}

Xue, Quan ^{[2
]}

机构：

[1] Nanjing Univ Sci & Technol, Dept Commun Engn, Nanjing 210094, Jiangsu, Peoples R China

[2] City Univ Hong Kong, State Key Lab Millimeter Waves Hong Kong, Hong Kong, Hong Kong, Peoples R China

来源：

IET MICROWAVES ANTENNAS & PROPAGATION | 2013年 / 7卷 / 12期

基金：

中国国家自然科学基金;

关键词：

LINE;

D O I：

10.1049/iet-map.2012.0444

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：

Two novel high-selectivity wideband balanced bandpass filters using symmetrical multi-mode resonators are presented. The proposed novel multi-mode resonator is used to realise a six-order wide passband in the differential mode. In addition, wide stopbands with insertion loss greater than 15 and 20 dB for the commode mode (0-18.5 GHz, 0-19 GHz) can also be achieved by the multi-mode resonators. The even/odd-modes of the symmetrical multi-mode resonators can be adjusted by changing the characteristic impedance of the shorted/open stubs. Two planar wideband balanced filters with 3 dB fractional bandwidths of 67.6 and 63.7% are designed and fabricated. The theoretical and measured results are in good agreement and show good in-band filtering performances and high selectivity.

引用

页码：1005 / 1015

页数：11

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