A Method to Design Lumped-element Tunable Bandpass Filters with Constant Absolute Bandwidth

被引：0
|
作者：
Kholodnyak, Dmitry [1 ]
Turgaliev, Viacheslav [1 ]
Baskakova, Alexandra [1 ]
机构：
[1] St Petersburg Elect Univ LETI, Dept Microelect & Radio Engn, Microwave Microelect Lab, St Petersburg, Russia
来源：
2014 44TH EUROPEAN MICROWAVE CONFERENCE (EUMC) | 2014年
关键词：
Bandpass filter; tunability; lumped elements; constant bandwidth;
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：
A simple and efficient design method for tunable filters on lumped elements is presented. The method allows designing bandpass filters with tunable central frequency and constant absolute bandwidth. The filter circuit consisting of series LC-tanks and impedance inverters is used in contrast to the conventional approach. Theoretical restrictions of the method as well as practical factors limiting its application are discussed. Feasibility of the method is demonstrated by a design example of the three-pole constant-bandwidth tunable filter using varactor diodes as controlling components. A good agreement between simulated and measured frequency responses of the tunable filter is shown.
引用
收藏
页码：335 / 338
页数：4
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