Millimeter-Wave FMCW Radar Development using SIW Butler Matrix for Time Domain Beam Steering
Millimeter-Wave FMCW Radar Development using SIW Butler Matrix for Time Domain Beam Steering
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发表时间：
2019-10
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通讯作者：
Pascual D. Hilario Re;C. Alistarh;S. Podilchak;G. Goussetis;J. Thompson;Jaesup Lee
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作者：
Pascual D. Hilario Re;C. Alistarh;S. Podilchak;G. Goussetis;J. Thompson;Jaesup Lee
汽车防撞雷达应用的一个可能的限制是不必要的天线波束在频率上的偏斜。为了解决这个问题，本文研究了一种新型的K波段汽车雷达，提高了发射功率分布在水平面上使用基板集成波导（SIW）4x4巴特勒矩阵（BM）波束形成网络。可扩展到77 GHz的24 GHz系统使用调频连续波（FMCW）传输，并通过及时切换BM的四个输入端口来扫描水平面。该雷达系统已被校准，并在一个消声室测量和角目标位置估计已完成使用数字波束形成。这些测试还比较了一个更传统的单输入多输出（SIMO）和多输入多输出（MIMO）FMCW雷达配置，它表明，建议BM雷达提供更高的返回功率，提高信噪比，增强视野方面的改进。
One possible limitation for automotive collision avoidance radar applications is unwanted antenna beam squinting over frequency. To circumvent this problem, this paper studies a novel K-band automotive radar that improves transmitted power distribution over the horizontal plane using a substrate-integrated waveguide (SIW) 4x4 Butler matrix (BM) beamforming network. The 24 GHz system, which is scalable to 77 GHz, uses frequency modulated continuous-wave (FMCW) transmission and scans the horizontal plane by switching the four input ports of the BM in time. The radar system has been calibrated and measured in an anechoic chamber and angular target position estimates have been completed using digital beamforming. These tests are also compared to a more conventional single-input multiple-output (SIMO) and multiple-input multiple-output (MIMO) FMCW radar configurations and it is shown that the proposed BM radar offers improvements in terms of higher return powers, improved signal-to-noise ratios, and enhanced field-of-view.