BST-varactor tunable dual-mode filter using variable ZC transmission line

被引：34
作者：
Chun, Young-Hoon [1 ]
Hong, Jia-Sheng [1 ]
Bao, Peng [2 ]
Jackson, Timothy J. [2 ]
Lancaster, Michael J. [2 ]
机构：
[1] Heriot Watt Univ, Dept Elect Engn & Comp Engn, Edinburgh EH14 4AS, Midlothian, Scotland
[2] Univ Birmingham, Dept Elect Engn & Comp Engn, Birmingham B15 2TT, W Midlands, England
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2008年 / 18卷 / 03期
基金：
英国工程与自然科学研究理事会;
关键词：
Barium-Strontium-Titanate (BST); dual mode filter; ferroelectric material; tunable circuit; tunable filter; varactor;
D O I：
10.1109/LMWC.2008.916778
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：
Ferroclectric materials like Barium-Strontium-Titanate (BST) have become attractive for microwave tunable circuit applications. This letter presents an investigation of BST-varactor tunable dual-mode filter using variable characteristic impedance or Z(C) transmission line. The interdigital BST varactors are fabricated and modeled, which are then deployed to realize a bandpass filter with tunable bandwidth capability. The use of tunable impedance line provides additional flexibilities in the design of microwave tunable circuits. A tunable bandpass filter of this type with a center frequency of 1.8 GHz and a bandwidth tuning ratio of 1.15:1 is demonstrated experimentally.
引用
收藏
页码：167 / 169
页数：3
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