Novel Varactor-Tuned Balanced Bandpass Filter with Continuously High Common-Mode Suppression

被引：0

作者：

Lu, Qing-Yuan ^{[1
]}

Chen, Jian-Xin ^{[1
]}

Zhou, Li-Heng ^{[1
]}

Tang, Hui ^{[1
]}

机构：

[1] Nantong Univ, Sch Elect & Informat, Nantong 226019, Peoples R China

来源：

APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL | 2013年 / 28卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Balanced bandpass filter (BPF); common-mode suppression; half-wavelength resonator; tunable filter; LINE; RESONATOR;

D O I：

暂无

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：

In this letter, a novel balanced varactor-tuned bandpass filter (BPF) designed by using the half-wavelength microship resonators is proposed. The frequency-tuning mechanism of the resonator is analytically investigated for designing the proposed balanced BPF. By adding a tunable capacitor to the center of the resonator, it is noted that the common mode can be suppressed to a great extent in the frequency-tuning range of the differential-mode passband. Also, it has no effect on the differential-mode response. For demonstration, a balanced BPF is designed and fabricated. The simulated and measured results with good agreement show that the center frequency of the differential-mode passband can be tuned from 0.725 GHz to 0.811 GHz, while the common-mode suppression in this frequency range is always more than 25 dB.

引用

页码：628 / 632

页数：5

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