In this study, the authors present a beam scanning lens antenna for 30 GHz applications, which is composed of a feed horn and a planar lens with parabolic phase distribution. Due to the parabolic phase compensation, the lens antenna can perform the scanning coverage of ±60° with a gain tolerance of 3 dB. The fabricated lens has a size of 10λ ₀ × λ ₀ × 0.2 λ ₀ ( λ ₀ is wavelength at the centre frequency of 30 GHz) and the focal length of 24 mm. The beam steering mechanism and the phase error of the lens antenna are analysed in detail. The total system has the advantages of wide scan angle, low profile and lightweight, and it can be readily applied to multi-beam or beam-scanning antenna designs.

中文翻译：

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基于抛物线相位分布透镜的波束扫描天线

在这项研究中，作者提出了一种用于30 GHz应用的束扫描透镜天线，它由一个馈电喇叭和一个具有抛物线相位分布的平面透镜组成。由于抛物线相位补偿，透镜天线可以执行±60°的扫描范围，增益容差为3 dB。所制造的透镜的尺寸为10λ ₀ ×λ ₀ ×0.2 λ ₀（ λ ₀是中心频率为30 GHz时的波长），焦距为24 mm。详细分析了透镜天线的波束控制机制和相位误差。整个系统具有扫描角度大，外形小巧和重量轻的优点，可以很容易地应用于多波束或波束扫描天线设计。