An Inductive-Loading Method for Directivity Enhancement of Microstrip Coupled-Line Couplers

被引：15

作者：

Ha, Jungje ^{[1
]}

Shin, Woongjae ^{[1
]}

Lee, Yongshik ^{[1
]}

机构：

[1] Yonsei Univ, Dept Elect & Elect Engn, Seoul 03722, South Korea

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2017年 / 27卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

Directional coupler; directivity enhancement; isolation enhancement; microstrip directional coupler; DIRECTIONAL COUPLER;

D O I：

10.1109/LMWC.2017.2678422

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 demonstrates a series-inductive loading method for the directivity enhancement of microstrip coupled-line couplers. The method has an extreme structural simplicity that is based on two pairs of mutually coupled inductors. Furthermore, it shows little, if any, compromise in the performance, as verified with a 20-dB coupler at 2 GHz. Experimental results show a +/- 0.5-dB bandwidth of 42%, which is the widest reported for reactively loaded coupler. The demonstrated 20-dB directivity bandwidth of 147% is the highest reported for a 20-dB coupler. Most importantly, the peak directivity of 59.9 dB is the highest reported thus far, which is a clear indication of the effectiveness of the proposed method.

引用

页码：356 / 358

页数：3

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