A Tri-Band Bandpass Filter With Wide Stopband Using Asymmetric Stub-Loaded Resonators

被引：49

作者：

Lan, Siang-Wen ^{[1
,2
]}

Weng, Min-Hang ^{[3
]}

Chang, Shoou-Jinn ^{[1
,2
]}

Hung, Cheng-Yuan ^{[3
]}

Liu, Shih-Kun ^{[4
]}

机构：

[1] Natl Cheng Kung Univ, Inst Microelect, Tainan 701, Taiwan

[2] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 701, Taiwan

[3] Met Ind Res & Dev Ctr, Med Devices & Optoelect Equipment Dept, Kaohsiung 82151, Taiwan

[4] Natl Kaohsiung Univ Appl Sci, Inst Photon & Commun, Kaohsiung 807, Taiwan

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2015年 / 25卷 / 01期

关键词：

Asymmetric stub-loaded resonator (ASLR); filter; resonant analysis; tri-band;

D O I：

10.1109/LMWC.2014.2365739

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 tri-band bandpass filter (BPF) with a wide stopband using asymmetric stub-loaded resonators (ASLR). A tri-band filter sample was fabricated by using two ASLRs with coupled I/O ports. By properly tuning the electrical length ratios of the ASLRs (alpha and gamma), three passbands can be designed at 1.4, 2.4, and 3.5 GHz. The harmonic responses are suppressed effectively by forming an uncoupled section at the end of the ASLRs, and the stopband region is formed from 3.7 to 7 GHz with a rejection level of 30 dB. The measured results of the fabricated tri-band BPF exhibit good agreement with simulated results.

引用

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页码：19 / 21

页数：3

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