Tunable absorptive bandpass filter with two transmission zeros based on image parameter method

被引：4
作者：
Cho, Young-Ho [1 ]
Park, Cheolsoo [2 ]
机构：
[1] Daelim Univ, Elect Commun Dept, Anyang Si, Gyeonggi Do, South Korea
[2] Kwangwoon Univ, Dept Comp Engn, Seoul, South Korea
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2024年 / 66卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
cognitive radio; dual-band bandpass filter; single-band bandpass filter; switchable passband; tunable filter;
D O I：
10.1002/mop.33932
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 tunable absorptive bandpass filter with two transmission zeros is presented. A lowpass absorptive filter prototype consisting of a matching section and a m-drive filter section is established based on image parameter method, and the filter elements are easily derived through the image impedance with the required return loss and transmission zeros. Moreover, the two transmission zeros are controlled by adjusting the parameters of the m-drive filter section. A distributed tunable absorptive bandpass filter is realized based on the proposed lowpass filter prototype. The fabricated filter shows a return loss of 21-25 dB and an insertion loss of 2.1-2.8 dB at the center frequency within the tuning range of 1.35-1.58 GHz.
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页数：6
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