用于雷达应用的创新型 K 波段槽形天线阵列

Shaza M. Elnady, Anwer S. Abd El-Hameed, Eman G. Ouf
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引用次数: 0

摘要

本文介绍了一种用于雷达应用的新型微带槽天线阵(SAA)配置。所提议的天线专为在 23 至 24.3 千兆赫的 K 波段工作而设计。天线结构由两层基板组成:馈电网络和地平面位于底层基板上,辐射槽位于第一层基板的顶层。独特的栅格馈电配置首次采用了 50 欧姆中心激励,改进了微带 SAA 的馈电机制。这一创新有助于实现紧凑的尺寸和高增益。为了提高侧叶电平,设计中采用了基底集成波导后置腔体,大大减少了表面波。SAA 由 25 个辐射元件组成,增益为 14 dBi。在仰角和方位角平面上,测量到的半功率波束宽度分别为 12.1° 和 69.1°。所建议的天线阵列的测量阻抗带宽范围为 23.15 至 24.75 千兆赫,保证反射系数(S11)小于 - 10 dB。所建议的天线在汽车多输入多输出雷达中的适用性已得到验证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Innovative K-band slot antenna array for radar applications
This article introduces a novel microstrip slot antenna array (SAA) configuration for radar applications. The proposed antenna is specifically designed for operation in the K-band, spanning from 23 to 24.3 GHz. The antenna structure comprises two substrates: the feed network and ground plane are on the bottom substrate, and the radiating slots are on the top layer of the first substrate. The incorporation of a unique grid feed configuration, featuring 50 Ohm center excitation for the first time, improves the feed mechanism of the microstrip SAA. This innovation contributes to achieving a compact size and high gain. To enhance the side lobe level, the design incorporates a substrate-integrated waveguide-backed cavity, which significantly reduces surface waves. The SAA consists of 25 radiating elements with a gain of 14 dBi. In the elevation and azimuth planes, the half-power beamwidths are measured at 12.1° and 69.1°, respectively. The proposed antenna array’s measured impedance bandwidth ranges from 23.15 to 24.75 GHz, guaranteeing a reflection coefficient (S11) of less than − 10 dB. The suggested antenna's applicability for automotive multi-input multi-output radar has been validated.
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