The effective and computationally efficient task-oriented synthesis of wide reflectarray antennas (RAs) comprising arbitrarily complex unit cells (UCs) is addressed. A multiscale formulation of the reflectarray synthesis problem is proposed where:1) the degrees-of-freedom (DoFs) of the architecture are defined at the microscale in terms of the UC descriptors, while 2) the design objectives are stated at the macroscale as user-defined constraints on the RA radiation features. The arising task-oriented multiscale reflectarray design problem is then dealt with a customized instance of the system-by-design paradigm. A set of numerical examples is shown to illustrate the features of the proposed design approach and to assess, also comparatively, its effectiveness/computational efficiency.

中文翻译：

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面向任务的反射阵列的系统设计多尺度综合

解决了包含任意复杂单位单元 (UC) 的宽反射阵列天线 (RA) 的有效且计算效率高的面向任务的合成。提出了反射阵列合成问题的多尺度公式，其中：1) 架构的自由度 (DoF) 根据 UC 描述符在微观尺度上定义，而 2) 设计目标在宏观尺度上表述为用户定义的对 RA 辐射特征的约束。出现的面向任务的多尺度反射阵列设计问题然后由系统设计范式的定制实例处理。显示了一组数值例子来说明所提出的设计方法的特征，并相对地评估其有效性/计算效率。