Phase Compensation Analysis of Rat-Race Coupler with Two Short Stubs

被引：0
|
作者：
Sun, Cheng-Guang [1 ]
Li, Ya-Jing [1 ]
Cheng, Dan [1 ]
机构：
[1] Tianjin Univ Technol & Educ, Inst Antenna & Microwave Tech, Tianjin 300222, Peoples R China
来源：
2022 INTERNATIONAL CONFERENCE ON MICROWAVE AND MILLIMETER WAVE TECHNOLOGY (ICMMT) | 2022年
关键词：
DESIGN;
D O I：
10.1109/ICMMT55580.2022.10022865
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：
For the rat-race coupler, an effective method to improve the phase bandwidth is by adding quarter-wavelength short-circuited branch at center frequency. In this paper, two short stubs are placed in a rat-race coupler to achieve phase compensation. Through the odd-even mode method, the specific analysis process is presented, and the impedance value of the short stub to obtain optimal phase bandwidth is derived. Based on these analyses, a prototype operating at 3GHz are developed and simulated. Results express good impedance matching and transmission characteristics. By using open stubs, another demonstrator is exhibited with a compact size. Numerical predictions shows that phase difference bandwidth of the two samples are significantly improved, thus confirming the analysis of this principle.
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页数：3
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