A generalized broadband coupled-line based rat-race coupler with arbitrary power division ratios and free terminated impedances

被引：1
|
作者：
Wang, Weimin [1 ]
Zheng, Yana [1 ]
Wu, Yongle [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Sch Elect Engn, POB 282, Beijing 100876, Peoples R China
来源：
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS | 2020年 / 125卷
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
Broadband; Rat-race coupler; Free terminated impedances; Arbitrary power-division ratios; Coupled-line section; UNIVERSAL APPROACH; PHASE DIFFERENCES; DESIGN;
D O I：
10.1016/j.aeue.2020.153388
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 generalized broadband coupled-line based rat-race coupler with arbitrary power division ratios and free terminated impedances is proposed in this paper. Besides, rigorous closed-form equations with respect to electrical parameters are derived in the section of analysis. Furthermore, one shorted coupled-line section and two identical open-circuited stubs are employed to achieve the requirement of wideband and miniaturization. Owing to additional design freedom, the calculation of parameters becomes much more flexible. For demonstration, a prototype for 6-dB wideband rat-race coupler centered at 1 GHz with the fractional bandwidth of 51.69% and free terminated impedances is designed, fabricated, and measured. Good agreement between the simulated and measured results can be observed, which can verify the validity of the proposed design principle.
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收藏
页数：6
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