Printed high-directivity metamaterial MS/NRI coupled-line coupler for signal monitoring applications

被引：38

作者：

Islam, R ^{[1
]}

Eleftheriades, GV ^{[1
]}

机构：

[1] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2006年 / 16卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

complex modes; high-directivity coupler; meta-materials; reflectometer; signal monitors;

D O I：

10.1109/LMWC.2006.872146

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：

Using the general coupled-mode formulation, it is shown that the interaction between a regular transmission line and a negative-refractive-index (NRI) line leads to complex coupled modes. Specifically the coupling between a regular microstrip (MS) and a NRI line is analyzed and the theory reveals conditions giving rise to high directivity. Experimental results are presented for a fully printed MS/NRI coupled-line coupler exhibiting a coupling level of -27 dB, isolation of -72 dB, and directivity of 45 dB at the design frequency of 2.04 GHz. Such low-coupling levels but high-directivity couplers are well suited for signal monitoring and instrumentation applications.

引用

页码：164 / 166

页数：3

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