Dual-Band Planar Crossover With Two-Section Branch-Line Structure

被引：55
作者：
Lin, Feng [1 ]
Chu, Qing-Xin [1 ]
Wong, Sai Wai [1 ]
机构：
[1] S China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510641, Guangdong, Peoples R China
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2013年 / 61卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Branch-line structure; crossover; dual band; microstrip; planar circuits; 4-PORT MICROSTRIP; TRANSITIONS;
D O I：
10.1109/TMTT.2013.2261084
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 dual-band planar crossover with simple structure is proposed. This crossover is derived from the conventional single-band two-section branch-line crossover by doubly extending the length of its vertical transmission lines, which realizes the dual-band operation. Closed-form equations for design parameters are derived, which simplifies design procedure of the proposed crossover and shows that the available bandwidth of the passband increases with the increasing frequency ratio. By adding one short-circuited stub and one open-circuited stub to the originally proposed dual-band crossover, two types of modified dual-band crossovers and their closed-form design equations are proposed for smaller and larger frequency ratios applications. For verification, four different dual-band crossovers are designed and simulated, of which two microstrip crossovers operating at 1/1.8 and 1/2.3 GHz are fabricated and measured. The measured results are in good agreement with the simulated ones.
引用
收藏
页码：2309 / 2316
页数：8
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