A STUB-LOADED TRIPLE-MODE SIR FOR NOVEL HIGH SELECTIVITY DUAL-WIDEBAND MICOSTRIP BPF DESIGN

被引：2
|
作者：
Deng, H. -W. [1 ]
Liu, B. [1 ]
Zhao, Y. -J. [1 ]
Zhang, X. -S. [1 ]
Chen, W. [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Informat Sci & Technol, Nanjing 210016, Jiangsu, Peoples R China
来源：
PROGRESS IN ELECTROMAGNETICS RESEARCH LETTERS | 2011年 / 21卷
关键词：
D O I：
10.2528/PIERL11011702
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：
In this letter, a novel high selectivity dual-wideband microstrip bandpass filter (BPF) is proposed using two stub-loaded triple-mode stepped-impedance resonators (SIR) which are the same type but with different sizes. The SIR is formed by attaching one T-type open stub at the center plane and two identical shortcircuited stubs symmetrically to stepped-impedance open microstrip line. And it can generate one odd mode approximatively determined by the stepped-impedance microstrip line and two even modes flexibly controlled by the loaded stubs. Either of the SIRs in this filter can not only separately generate one passband but also control the passband performance. Due to the intrinsic characteristics of the SIR, four transmission zeros can be created to improve the selectivity. A dual-wideband filter with the fractional bandwidth 14.9% for the first band from 3.09 GHz to 3.58 GHz and 10.2% for the second band from 4.99 GHz to 5.53 GHz is designed and fabricated. The filter is evaluated by experiment and simulation with good agreement.
引用
收藏
页码：169 / 176
页数：8
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