A Novel Low-Pass Filter With an Embedded Band-Stop Structure for Improved Stop-Band Characteristics

被引：44
|
作者：
He, Qijuan [1 ]
Liu, Changjun [1 ]
机构：
[1] Sichuan Univ, Sch Elect & Informat Engn, Chengdu 610064, Peoples R China
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2009年 / 19卷 / 10期
关键词：
Band-stop filters; low-pass filters (LPFs); microstrip; COMPACT;
D O I：
10.1109/LMWC.2009.2029738
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 letter presents a novel design of a microstrip low-pass filter (LPF) with an embedded band-stop structure, which is constructed from a simple two transmission line band-stop filter. The band-stop structure is ingeniously embedded into a classical step-impedance microstrip LPF. The stop-band of the proposed LPF is more than two times broader than the original design, while its cut-off frequency remains at 1.8 GHz. The embedded structure does not increase the physical dimension of the LPF, but improves the performance significantly. Measured results agree with simulation well, and validate the dual-frequency design method.
引用
收藏
页码：629 / 631
页数：3
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