Compact ultra-wideband differential bandpass filter using self-coupled ring resonator

被引：7
|
作者：
Wang, Hui [1 ]
Yang, Yu-Qian [1 ]
Kang, Wei [1 ]
Wu, Wen [1 ]
Tam, Kam-Weng
Ho, Sut-Kam
机构：
[1] Nanjing Univ Sci & Technol, Ministerial Key Lab JGMT, Nanjing 210094, Jiangsu, Peoples R China
来源：
ELECTRONICS LETTERS | 2013年 / 49卷 / 18期
关键词：
COMMON-MODE SUPPRESSION; LINE;
D O I：
10.1049/el.2013.1319
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 ultra-wideband differential bandpass filter (BPF) based on a self-coupled ring resonator is proposed. The self-coupled line contributes to not only three poles in differential-mode (DM) but also three zeros in common-mode (CM) offering both a wide differential passband and good CM suppression. A fabricated filter with a 3 dB fractional bandwidth of 118% for the DM and insertion loss greater than 18 dB for the CM has been designed and measured. This filter is only 30.4 x 1.0 mm (1.0 lambda(0) x 0.03 lambda(0)) and it is only 15% of the size of the most reported differential BPFs. The simulated and measured results are in good agreement.
引用
收藏
页码：1156 / 1157
页数：2
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