Wideband reflector antenna feeds are a geometrically complex class of antennas, requiring a variety of design parameters to describe their form. This casts the optimization of such structures as a high‐dimensionality problem. The antenna responses are also difficult to predict and must be determined via computationally expensive full‐wave electromagnetic simulations. This paper proposes a surrogate‐based optimization approach for the design of wideband feed antennas. Beginning with high‐fidelity goal function data from a global search space, the framework nominates a number of local search regions where separate, formal, multifidelity optimizations are performed. The formulated goal function maximizes the receiving sensitivity, while ensuring that the reflection coefficient response satisfies a predefined criterion. An approximate, fast‐to‐evaluate coarse model of the goal function, based on a series of surrogate models estimating the feed and reflector antenna responses, is formulated. Most of the optimization burden is shifted to the coarse model, where high‐fidelity samples are adaptively added to the regions of the design space where the coarse model performs well or where the sampling is sparse. As a design example, the optimization of a quad‐ridge flared horn feed antenna, on a Square Kilometre Array reflector system, is presented to highlight the efficacy of the method.

中文翻译：

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高效优化宽带反射器馈电天线以实现最佳接收灵敏度

宽带反射器天线馈源是一类复杂的天线，需要各种设计参数来描述其形式。这将这种结构的优化视为高维问题。天线响应也很难预测，必须通过计算量大的全波电磁仿真来确定。本文为宽带馈电天线的设计提出了一种基于代理的优化方法。该框架从来自全局搜索空间的高保真目标函数数据开始，指定了多个本地搜索区域，在这些区域中分别执行了单独的，正式的，多保真度优化。制定的目标函数可最大程度地提高接收灵敏度，同时确保反射系数响应满足预定标准。大概 根据一系列估计馈电和反射器天线响应的替代模型，制定了目标函数的快速评估粗略模型。大多数优化负担都转移到了粗模型上，在该模型上，高保真样本被自适应地添加到设计空间中粗模型表现良好或采样稀疏的区域。作为一个设计实例，提出了在平方公里阵列反射器系统上对四脊喇叭喇叭形馈源天线的优化，以突出该方法的有效性。将高保真样本自适应地添加到设计空间中粗略模型效果良好或采样稀疏的区域。作为一个设计实例，提出了在平方公里阵列反射器系统上对四脊喇叭喇叭形馈源天线的优化，以突出该方法的有效性。将高保真样本自适应地添加到设计空间中粗略模型效果良好或采样稀疏的区域。作为一个设计实例，提出了在平方公里阵列反射器系统上对四脊喇叭喇叭形馈源天线的优化，以突出该方法的有效性。