A broad-band quarter-wavelength impedance transformer with three reflection zeros within passband

被引：21

作者：

Sen Ang, K ^{[1
]}

Lee, CH ^{[1
]}

Leong, YC ^{[1
]}

机构：

[1] DSO Natl Labs, Singapore 118230, Singapore

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2004年 / 52卷 / 12期

关键词：

circuit analysis; coupled lines; impedance transformation; passive circuits;

D O I：

10.1109/TMTT.2004.837310

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 new impedance transformer employing a transmission line and a coupled-line section is presented in this paper. It is physically a quarter-wavelength long, but can achieve three reflection zeros within the passband. Therefore, broad bandwidths can be obtained for a wide range of impedance ratios. The location of the reflection zeros can be synthesized through the transmission line and coupled-line parameters. Design curves for the transformer synthesis have been obtained by solving the design equations directly. Using these results, a stripline impedance transformer has been implemented. This 50-110-Omega impedance transformer achieved over 25-dB return loss from 0.6 to 1.6 GHz.

引用

页码：2640 / 2644

页数：5

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