Compact microstrip line directional coupler with high directivity

被引：3

作者：

Zhu, Y. ^{[1
]}

Zhang, J. ^{[1
]}

Zhu, H. ^{[1
]}

Cheng, J. ^{[1
]}

Li, J. ^{[2
]}

机构：

[1] PLA Univ Sci & Technol, Key Lab Satellite Commun, Inst Commun Engn, Nanjing 210007, Jiangsu, Peoples R China

[2] Nanjing Univ Sci & Technol, Ministerial Key Lab JGMT, Nanjing 210094, Jiangsu, Peoples R China

来源：

JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS | 2012年 / 26卷 / 11-12期

关键词：

POWER DIVIDER; BAND; DESIGN;

D O I：

10.1080/09205071.2012.706590

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 compact directional coupler with high directivity is presented. The coupling passbands characteristics of the multisections coupler which cascades two coupled lines via transmission line are analyzed. In addition, asymmetric coupled line and stepped impedance matching method are used to generate the isolation zero. A 2.45 GHz coupler is designed and implemented. The 3 dB bandwidth of the coupling is from 1.2 to 3.55 GHz with the corresponding fractional bandwidth (FBW) of 98%, and the directivity is better than 20 dB from 0.5 to 3.5 GHz. The proposed coupler presents small size and excellent directivity compared with the traditional parallel coupled line coupler.

引用

页码：1619 / 1623

页数：5

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