A Low Loss X-Band Quasi-Elliptic Ferroelectric Tunable Filter

被引：38

作者：

Courreges, Stanis ^{[1
]}

Li, Yuan ^{[1
]}

Zhao, Zhiyong ^{[2
]}

Choi, Kwang ^{[2
]}

Hunt, Andrew ^{[2
]}

Papapolymerou, John ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Elect & Comp Engn ECE, Atlanta, GA 30308 USA

[2] nGimat Inc, Chamblee, GA 30341 USA

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2009年 / 19卷 / 04期

关键词：

Barium strontium titanate (BST) capacitors; micro-electro-mechanical systems (MEMS);

D O I：

10.1109/LMWC.2009.2015494

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 compact high quality factor four-pole X-band tunable quasi-elliptic bandpass filter is presented in this letter. The filter is enabled by high-Q ferroelectric barium strontium titanate capacitors and open-loop resonators. The central frequency of 8.35 GHz and the frequency tuning range of 500 MHz (6%) are achieved with a dc bias voltage of 30 V. The selective filter has a fractional I dB bandwidth ranging from 5.5% up to 7.3%. The measured insertion loss and return loss are 5.7-3.5 dB and 10.2-7.9 dB, respectively, with a dc bias range of 0 to 30 V. To the best of our knowledge, this is the best analog tunable performance and selectivity in X-band.

引用

页码：203 / 205

页数：3

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