Investigation of a Wideband 90° Hybrid Coupler With an Arbitrary Coupling Level

被引：63

作者：

Chiu, Leung ^{[1
]}

Xue, Quan ^{[2
]}

机构：

[1] Southeast Univ, State Key Lab Millimeter Waves, Sch Informat Sci & Engn, Nanjing 210096, Peoples R China

[2] City Univ Hong Kong, State Key Lab Millimeter Waves, Kowloon, Hong Kong, Peoples R China

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2010年 / 58卷 / 04期

关键词：

Bandwidth enhancement; 90 degrees hybrid coupler; parallel-strip phase inverter;

D O I：

10.1109/TMTT.2010.2042835

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 paper presents a new class of wideband 90 hybrid coupler with an arbitrary coupling level. The physical size of the proposed coupler is close to that of a conventional two-section branch-line coupler, but it has an additional phase inverter. The impedance bandwidth of the proposed coupler is close to that of a four-section branch-line coupler. The proposed coupler is a backward-wave coupler with a port assignment different from that of a conventional branch-line coupler. The design formulas of the proposed coupler are proved based on its even-and odd-mode half structures. We demonstrated three couplers at the center frequency of 2 GHz with different design parameters.

引用

页码：1022 / 1029

页数：8

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