A tunable bandpass-to-bandstop filter with controllable bandwidth and high rejection level

被引：8
|
作者：
Li, Run-Shuo [1 ]
Chen, Fu-Chang [1 ]
机构：
[1] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou, Guangdong, Peoples R China
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2017年 / 59卷 / 01期
基金：
中国国家自然科学基金;
关键词：
bandpass-to-bandstop; controllable bandwidth; tunable filter; varactor; PIN diode;
D O I：
10.1002/mop.30242
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 tunable bandpass-to-bandstop filter with controllable bandwidth is proposed in this article. The bandpass-to-bandstop transformation can be achieved by adjusting the PIN diode, and bandwidth of the bandpass filter can be controlled by adjusting the voltage of varactors, as the coupling coefficients and the external quality factors (Q(e)) can be tuned by changing the ratios of the loaded capacitances. In the bandpass mode, a tuning range of 805-1032 MHz (24.7%) with return loss better than 11.5 dB can be achieved. In the bandstop mode, a tuning range of 760-1228 MHz (47.1%) can be obtained. The rejection level of the bandstop mode is higher than 40 dB. (c) 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:110-113, 2017
引用
收藏
页码：110 / 113
页数：4
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