Wideband Hybrid Coupler With Electrically Switchable Phase-Difference Performance

被引：24

作者：

Ding, Kejia ^{[1
]}

Kishk, Ahmed ^{[1
]}

机构：

[1] Concordia Univ, Elect & Comp Engn Dept, Montreal, PQ H3G 1M8, Canada

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2017年 / 27卷 / 11期

关键词：

Asymmetric hybrid coupler; Butler matrix; switchable hybrid coupler; switchable output phase difference; BUTLER MATRIX; COMPACT; SHIFTER; BEAM;

D O I：

10.1109/LMWC.2017.2750028

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 wideband hybrid coupler with an adjustable output phase difference with equal power division is proposed. A compact, low-loss and low-cost reconfigurable transmission line with electrically switchable equivalent characteristic impedance and length is introduced and adopted in this design, which is based on a two-section quadrature hybrid structure. Additionally, only two bias points are needed in this hybrid coupler to operate six switches synchronously and provide three output phase differences; 90 degrees and 90 +/- a degrees ( a <= 30 degrees has been verified). Good matching, isolation, and equal power division are obtained under all phase-difference possibilities. Two examples of a = 15 degrees and 30 degrees are fabricated and measured for 2.4-GHz applications. Testing results demonstrate satisfying properties including the notably stable phase difference with an error less than +/- 6 degrees over 30% frequency bandwidth. The presented hybrid couplers would be appropriate for Butler matrices to increase the number of possible beams, which will be more than the number of ports.

引用

页码：992 / 994

页数：3

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