Analysis of a Reconfigurable Bandpass Circular Patch Filter

被引:12
作者
Caniato Serrano, Ariana Lacorte [1 ,2 ]
Correra, Fatima Salete [2 ]
Vuong, Tan-Phu [1 ]
Ferrari, Philippe [3 ]
机构
[1] Grenoble Inst Technol INPG, IMEP LAHC, F-38016 Grenoble, France
[2] Univ Sao Paulo, Microelect Lab, Polytech Sch, BR-05424970 Sao Paulo, Brazil
[3] Univ Grenoble 1, IMEP LAHC, F-38016 Grenoble, France
关键词
Bandpass filters; coupling matrix; microwave filters; triple-mode resonators; tunable filters; varactors; MODE; RESONATOR; DESIGN;
D O I
10.1109/TMTT.2010.2085442
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
This paper presents an analysis of a reconfigurable patch filter based on a triple-mode circular patch resonator with four radial slots. The analysis has been carried out thanks to the development of a new theoretical approach of the tunable patch filter based on the coupling matrix. The coefficients of the coupling matrix related to the tunable behavior have been identified and some rules for their evolution have been derived. For a proof-of-concept, a bandpass filter has been designed with a continuous tunability obtained with varactors connected across the slots. State-of-the-art results have been obtained, with a frequency tuning range of 27% from 1.95 to 2.43 GHz and a change in fractional bandwidth from 8.5% to 31.5% for the respective frequencies. In the entire tuning range, the return loss is better than 10 dB and the maximum insertion loss is 2 dB. Due to the newly developed coupling matrix, measurements, simulations, and theory showed great agreement.
引用
收藏
页码:3918 / 3924
页数:7
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