Microstrip Branch-Line Coupler with Optimized Spurious Suppression Based on Cascaded PI-Type Equivalent Transmission Lines

被引：0

作者：

Lin, Shih-Cheng ^{[1
]}

Yeh, Chong-You ^{[2
]}

机构：

[1] Natl Chiayi Univ, Dept Elect Engn, Chiayi, Taiwan

[2] Natl Chiayi Univ, CSIE Dept, Chiayi, Taiwan

来源：

2014 IEEE INTERNATIONAL WORKSHOP ON ELECTROMAGNETICS (IEEE IWEM): APPLICATIONS AND STUDENT INNOVATION COMPETITION | 2014年

关键词：

branch-line coupler; spurious suppression; PI-type network;

D O I：

暂无

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 microstrip branch-line coupler (BLC) has been design and implemented with optimized spurious suppression. Taking advantage of the PI-type network composed of a uniform transmission line (TL) loaded by two shunt open-ended stubs, a nature transmission line can be equivalent to the cascade of N sections of PI-type networks. A convenient design chart is provided to facilitate the TL equivalent. The coupler constructed by replacing the nature TLs with the equivalent ones possesses multiple structure-inherent transmission zeros which significantly improve the out-of-band rejection. Specifically, a coupler with center frequency f(0) at 1.53GHz has its stopband extended up to 8.33 f(0) with rejection level better than 20dB.

引用

页码：195 / 196

页数：2

共 6 条

[1] GIPPRICH JW, 1993, IEEE MTT-S, P589, DOI 10.1109/MWSYM.1993.276869
[2] A Design Methodology for Miniaturized 3-dB Branch-Line Hybrid Couplers Using Distributed Capacitors Printed in the Inner Area
Jung, Sung-Chan
Negra, Renato
Ghannouchi, Fadhel M.
[J]. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2008, 56 (12) : 2950 - 2953
[3] Reduced branch-line coupler using eight two-step stubs
Sakagami, I
Haga, M
Munehiro, T
[J]. IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION, 1999, 146 (06) : 455 - 460
[4] Miniaturization of microstrip branch-line coupler with dual transmission lines
Tang, Ching-Wen
Chen, Ming-Guang
Tsai, Chih-Hung
[J]. IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 2008, 18 (03) : 185 - 187
[5] Miniaturized branch-line coupler with harmonic suppression for RFID applications using artificial transmission lines
Wang, Chao-Wei
Ma, Tzyh-Ghuang
Yang, Chang-Fa
[J]. 2007 IEEE/MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-6, 2007, : 29 - 32
[6] COMPACT MICROSTRIP HARMONIC-SUPPRESSED QUADRATURE HYBRIDS
Wang, Li-Yen
Hsu, Kewen
Tu, Wen-Hua
[J]. MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2009, 51 (04) : 981 - 985

← 1 →