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Beam Scanning Antenna Using a Reflectarray as Sub-Reflector

机译：使用Reflectarray作为副反射器的波束扫描天线

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摘要

In this paper, a dual-reflector antenna based on a main parabolic reflector and a reconfigurable reflectarray as subreflector is proposed for beam scanning applications. The beam deflecting is achieved by modifying the phase introduced by each element of the subreflectarray. The required phase distribution for each scan angle is obtained through a synthesis technique based on the analysis of the antenna in receive mode. The design technique has been applied to the particular cases of beam scanning in azimuth and elevation planes. Patches aperture-coupled to delay lines, which provide low losses and cross-polar levels, are proposed as elements for the reflectarray subreflector, allowing the easy implementation of electronic control devices in the microstrip delay lines. The results show that the beam can be scanned in a range ±6° by inserting switches on the delay line to provide a 3-bit quantization.
机译：本文提出了一种基于主抛物面反射器和可重构反射阵列作为子反射器的双反射器天线，用于波束扫描应用。通过修改由子反射阵列的每个元件引入的相位来实现光束偏转。通过基于接收模式下天线分析的综合技术，可以获得每个扫描角度所需的相位分布。该设计技术已应用于在方位角和仰角平面中进行光束扫描的特殊情况。提出将孔径耦合至延迟线的贴片（其提供低损耗和交叉极化水平）作为反射阵列子反射器的元件，从而允许在微带延迟线上轻松实现电子控制装置。结果表明，通过在延迟线上插入开关以提供3位量化，可以在±6°的范围内扫描光束。

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