A Novel Frequency Control Loop for Tunable Notch Filters

被引：5

作者：

De Luis, Javier R. ^{[1
,2
]}

Gu, Qizheng ^{[1
]}

Morris, Arthur S. ^{[1
]}

De Flaviis, Franco ^{[2
]}

机构：

[1] Wispry Inc, Irvine, CA 92618 USA

[2] Univ Calif Irvine, Dept Elect Engn & Comp Sci, Irvine, CA 92697 USA

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2011年 / 59卷 / 09期

关键词：

Actuation delay; filter frequency control loop; loop convergence; notch filter; RF microelectromechanical systems (MEMS); tunable capacitors; tunable filter;

D O I：

10.1109/TMTT.2011.2160962

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 paper, a novel frequency control loop system for tunable notch filters is presented. The frequency control loop is designed for automatically tuning a microelectromechancial systems tunable notch filter, which has 22-dB rejection in the notch band and less than 0.8-dB insertion loss over a 5-MHz passband bandwidth in the International Mobile Telecommunications band (2.1 GHz). The filter frequency control loop is based on sensing the reflection phase change of a reference signal (in this case, the transmitter carrier) and is developed to track the transmitter operation frequency.

引用

页码：2265 / 2274

页数：10

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