A TUNABLE BANDPASS FILTER WITH CONSTANT ABSOLUTE BANDWIDTH

被引：16
|
作者：
Liu, B. [1 ]
Wei, F. [1 ]
Wu, Q. Y. [1 ]
Shi, X. W. [1 ]
机构：
[1] Xidian Univ, Natl Key Lab Antennas & Microwave Technol, Xian 710071, Shaanxi, Peoples R China
来源：
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS | 2011年 / 25卷 / 11-12期
关键词：
MICROSTRIP; RESONATORS; SWITCHES; DESIGN;
D O I：
10.1163/156939311797164819
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 novel tunable bandpass filter with constant absolute bandwidth is presented in this paper. Introducing a mixed electric and magnetic coupling structure and a new external coupling scheme, nearly constant absolute bandwidth is maintained across the tuning range. Theoretical analysis and design approach are demonstrated. The proposed filter is designed with a frequency coverage of 0.78-1.08 GHz and constant 3-dB bandwidth of 50 MHz over the tuning range. The experimental results show good performance of the filter and validate the design concept.
引用
收藏
页码：1596 / 1604
页数：9
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