Quasi-Arbitrary Phase-Difference Hybrid Coupler

被引:61
作者
Wong, Yuk Shing [1 ]
Zheng, Shao Yong [1 ]
Chan, Wing Shing [1 ]
机构
[1] City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China
关键词
Arbitrary phase characteristics; Butler matrix; reflectometer; 3-dB hybrid coupler; BRANCH-LINE COUPLER; MICROSTRIP ANTENNA-ARRAY; BAND; DESIGN; MATRIX;
D O I
10.1109/TMTT.2012.2187918
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
Previous hybrid couplers have output phase difference that have either been 0 degrees, 90 degrees, or 180 degrees. Other phase differences could only be realized using additional phase-shift elements. This increased circuit size and cost, and also degraded overall performance due to interconnecting mismatch losses. The proposed uniplanar arbitrary phase-difference coupler eliminates these additional components, thereby maintaining small size and good performance. Theoretical analysis is presented here together with measured results for two microstrip couplers for verification.
引用
收藏
页码:1530 / 1539
页数:10
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