Multisection impedance-transforming coupled-line baluns

被引：112

作者：

Ang, KS ^{[1
]}

Leong, YC ^{[1
]}

Lee, CH ^{[1
]}

机构：

[1] DSO Natl Labs, Singapore 118230, Singapore

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2003年 / 51卷 / 02期

关键词：

baluns; coupled lines; impedance transformation; multisections;

D O I：

10.1109/TMTT.2002.807813

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 class of multisection impedance-transforming coupled-line baluns is presented in this paper. It is based on the quarter-wavelength coupled-line balun. By cascading several coupled and uncoupled-line sections, broad-band baluns with good amplitude and phase balance can be realized using simple microstrip coupled lines. The resulting circuit has a simple structure with minimal discontinuities that is highly suited for very high-frequency applications. Simple design equations and experimental verifications will be presented. Using micostrip coupled sections with even-mode impedance of 159 Omega, the fabricated balun achieved 0.5-dB amplitude balance over 30% bandwidth. With higher even-mode impedance, almost perfect amplitude balance was achieved over 100% bandwidth.

引用

页码：536 / 541

页数：6

共 12 条

[1] Converting baluns into broad-band impedance-transforming 180° hybrids [J].