Planar Dual-Band Branch-Line Coupler With Large Frequency Ratio

被引：23

作者：

Xia, Lei ^{[1
]}

Li, Jia-Lin ^{[2
]}

Twumasi, Baidenger Agyekum ^{[2
,3
]}

Liu, Peng ^{[2
]}

Gao, Shan-Shan ^{[4
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Chengdu 611731, Peoples R China

[2] Univ Elect Sci & Technol China, Sch Phys, Chengdu 610054, Peoples R China

[3] Ho Tech Univ, Elect Elect Engn Dept, Ho, Ghana

[4] Chengdu Univ, Sch Elect & Informat Engn, Chengdu 610106, Peoples R China

来源：

IEEE ACCESS | 2020年 / 8卷

基金：

中国国家自然科学基金;

关键词：

Dual-band; branch-line coupler; E-shaped impedance transformer; large frequency ratio; DESIGN;

D O I：

10.1109/ACCESS.2020.2974235

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This work presents a novel planar branch-line coupler topology developed for dual-band operation using an E-shaped impedance transformer network to supplant the conventional microstrip line. Explicit closed-form design equations for dual-band operation are derived using the ABCD matrices. The studied coupler features a large dual-band frequency ratio with a compact size. A prototype coupler centered at 1 and 8 GHz is first presented and experimentally examined to demonstrate the large frequency ratio. Further, another prototype coupler centered at 2.4 and 5.2 GHz for potential WLAN applications is also developed and experimentally characterized. Measurements and simulations for both prototype couplers show good performance within the studied dual-band frequencies.

引用

页码：33188 / 33195

页数：8

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