A stub tapped branch-line coupler for dual-band operations

被引：151

作者：

Zhang, Hualiang ^{[1
]}

Chen, Kevin J. ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Kowloon, Hong Kong, Peoples R China

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2007年 / 17卷 / 02期

关键词：

ABCD-matrix; branch-line coupler; dual-band; monolithic microwave integrated circuit (MMIC); quarter-wavelength;

D O I：

10.1109/LMWC.2006.890330

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 stub tapped branch-line coupler for dual-band applications. In the new design, a tapped stub is used to realize 90 degrees phase change at two frequencies. Both the characteristic impedance and the length of the proposed branch lines are adjusted accordingly compared with the conventional structure. Explicit design equations are derived using the ABCD-matrix. To verify the design concept, a microstrip coupler operating at 0.9 and 2 GHz is fabricated and measured on a Rogers' RO4003 board.

引用

页码：106 / 108

页数：3

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