Dual-band bandpass filter using two simple coupled microstrip rings

被引：3
作者：
Xu, Jiashuai [1 ]
Xu, Kai-Da [2 ,3 ]
Zhang, Miao [1 ]
Chen, Qiang [3 ]
机构：
[1] Xiamen Univ, Dept Elect Sci, Xiamen, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Informat & Commun Engn, Xian 710049, Peoples R China
[3] Tohoku Univ, Dept Commun Engn, Sendai, Miyagi 9808579, Japan
来源：
ENGINEERING REPORTS | 2021年 / 3卷 / 02期
基金：
中国国家自然科学基金; 奥地利科学基金会; 日本学术振兴会;
关键词：
bandpass filters; coupled lines; dual-band; ring resonators; RESONATOR;
D O I：
10.1002/eng2.12288
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
A new dual-band bandpass filter (BPF) using two very simple coupled microstrip rings is proposed in this paper. The two identical 3 lambda (g)/2 microstrip rings are coupled each other with lambda (g)/2 coupled length, resulting in the generation of dual frequency bands with multiple transmission zeros (TZs). Theoretical deduction is presented to verify the proposed structure. The center frequencies and bandwidths of the two passbands can be tuned by controlling the impedance parameters of the microstrip rings. For demonstration, a prototype example of this dual-band BPF is fabricated and characterized. The measured results show that it has high selectivity and great return losses of passbands with multiple TZs at the stopband.
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页数：7
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