Design of a Switchable Microstrip Dual-Band Lowpass-Bandpass Filter

被引：39

作者：

Deng, Pu-Hua ^{[1
]}

Tsai, Jen-Tse ^{[1
]}

Liu, Ren-Chuan ^{[1
]}

机构：

[1] Natl Univ Kaohsiung, Dept Elect Engn, Kaohsiung 811, Taiwan

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2014年 / 24卷 / 09期

关键词：

Bandpass; dual-band; filter; lowpass; microstrip; stepped-impedance resonators (SIRs); switchable;

D O I：

10.1109/LMWC.2014.2332038

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 study proposes a filter with four switching modes (dual-band lowpass-bandpass filter mode, lowpass filter (LPF) mode, bandpass filter (BPF) mode, and both-bands-turned-off mode). In the dual-band lowpass-bandpass mode, the measured lowpass channel in-band insertion loss and cutoff frequency were less than 0.37 dB, and approximately 1.5 GHz, respectively; the measured center frequency, measured minimal insertion loss, and 3 dB fractional bandwidth of the bandpass response were approximately 2.4 GHz, 3.3 dB, and 9%, respectively. The measured suppression levels of the turned-off lowpass band and bandpass band responses were better than 26 and 33 dB, respectively.

引用

页码：599 / 601

页数：3

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