A Low-Cost Wideband 77-GHz Planar Butler Matrix in SIW Technology

被引：104

作者：

Djerafi, Tarek ^{[1
]}

Wu, Ke ^{[1
]}

机构：

[1] Ecole Polytech, Poly Grames Res Ctr, Dept Genie Elect, Montreal, PQ H3T 1J4, Canada

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2012年 / 60卷 / 10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Beamforming network; Butler matrix; directional coupler; slot antenna array; substrate integrated waveguide (SIW); DESIGN;

D O I：

10.1109/TAP.2012.2207309

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：

This communication presents a low-cost 77-GHz switched-beam slot antenna array driven by a Butler matrix. In the proposed configuration, four broadband couplers are combined and crossovers are effectively avoided. In this case, the overall circuit and beamforming network losses are considerably reduced. A 4 4 planar SIW Butler matrix is designed and demonstrated for integrated beamforming network applications, which exhibits about 7 degrees phase error and +/- 0.75 dB coupling imbalance over 11% bandwidth. This experimentally proto-typed matrix is integrated with a four-array slot antenna on the same substrate. An alternating displacement of the slots in subsequent radiating waveguides is proposed to save the arrangement of the input ports and to achieve broadband performances. Measured radiation patterns are in good agreement with simulated counterparts over the proposed 77-GHz frequency range.

引用

页码：4949 / 4954

页数：7

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