COMPACT, BROAD-STOPBAND LOWPASS FILTERS USING SIRS-LOADED CIRCULAR HAIRPIN RESONATORS

被引：53
|
作者：
Yang, M. H. [1 ]
Xu, J. [1 ]
Zhao, Q. [1 ]
Peng, L. [1 ]
Li, G. P. [1 ]
机构：
[1] Univ Elect Sci & Technol China, Inst Appl Phys, Chengdu 610054, Peoples R China
来源：
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER | 2010年 / 102卷
关键词：
SPLIT RING-RESONATOR; BANDPASS FILTER; MICROSTRIP; DGS;
D O I：
10.2528/PIER09120901
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 compact resonator for LPF is proposed in this paper. It is composed of a circular hairpin resonator and a pair of coupled parallel stepped impedance resonators (SIRs) inside. With the loaded SIRs, additional two transmission zeros can be introduced and adjusted easily to cancel the spurious responses for stopband extending, while do not change the filter size. Filters using one and two of the new cells were designed and measured. The two-cell LPF has an insertion loss less than 0.6 dB from DC to 1.6 GHz, including attenuation of double SMA transitions at both sides of the circuit which is about 0.3 dB, and a wide -10 dB stopband from 2.5 to 13 GHz (corresponding to 146% normalized 10 dB stopband), but has a size of only 0.129 lambda g x 0.073 lambda g.
引用
收藏
页码：95 / 106
页数：12
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