A High-Selectivity Tunable Dual-Band Bandpass Filter Using Stub-Loaded Stepped-Impedance Resonators

被引：42
作者：
You, Bin [1 ]
Chen, Long [1 ]
Liang, Yaping [1 ]
Wen, Xuan [2 ]
机构：
[1] Hangzhou Dianzi Univ, Minist Educ, Circuits & Syst Key Lab, Hangzhou, Zhejiang, Peoples R China
[2] Nokia Siemens Networks Technol Beijing Co Ltd, Hangzhou, Zhejiang, Peoples R China
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2014年 / 24卷 / 11期
关键词：
Dual-band; high selectivity; stub-loaded resonators; tunable bandpass filter (BPF);
D O I：
10.1109/LMWC.2014.2348322
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 novel varactor tunable dual-band bandpass filter (BPF) using stub-loaded stepped-impedance resonators is proposed in this letter. Compared with the traditional tunable filters, the source-load coupling and T-shape stub-loaded lines are employed in this design. The proposed BPF architecture has the advantages of high selectivity and less control voltages. In the overall tuning range, the proposed filter is designed with 5-6 transmission zeros and more than 30 dB rejection between the two passbands. Meanwhile, only one control voltage is needed for each passband. A prototype of this filter is fabricated and measured. The measurement results show great agreement with simulated results, which show that the first passband can be tuned in a frequency range from 0.8 to 1.02 GHz, and the second passband varies from 2.02 to 2.48 GHz.
引用
收藏
页码：736 / 738
页数：3
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