This paper presents a new cavity model surrogate-based optimization for electrically thick probe-fed circularly polarized rectangular microstrip antennas. The proposed methodology feeds back input impedance and far-field information from full-wave electromagnetic solvers in order to calibrate known sources of inaccuracy within the cavity model. Said calibration is achieved by solving a constrained non-linear least squares problem. The calibrated cavity model is used to generate a new antenna geometry that will be subjected to the same calibration process until convergence is achieved. The amount of iterations needed to achieve convergence for several configurations is less than or equal to three, this indicates that the cavity model surrogate-based optimization can be used as an efficient design technique. In addition, the optimization process correctly anticipated that unequal fringing field lengths for the resonant modes are required to calibrate the cavity model, demonstrating that great physical insight is gained throughout the optimization process. For the validation of the proposed design procedure, eight electrically thick antennas were designed and optimized, of which three were manufactured and tested. Good agreement between simulated and experimental results were observed, validating the applicability of the proposed strategy.

本文提出了一种新的基于腔模型替代的电厚探针馈电圆极化矩形微带天线优化方法。所提出的方法从全波电磁求解器反馈输入阻抗和远场信息，以便校准腔模型内的已知误差源。所述校准通过解决约束非线性最小二乘问题来实现。校准后的腔体模型用于生成新的天线几何形状，将对其进行相同的校准过程，直到实现收敛为止。为几种配置实现收敛所需的迭代数量小于或等于3，这表明基于腔模型替代的优化可以用作一种有效的设计技术。此外，优化过程正确地预料到，谐振模式需要不相等的边缘场长度来校准腔体模型，这表明在整个优化过程中都可以获得很好的物理洞察力。为了验证所提出的设计程序，设计并优化了8根电气较厚的天线，其中3根已经过制造和测试。观察到模拟结果和实验结果之间的良好一致性，验证了所提出策略的适用性。其中三个已制造和测试。观察到模拟结果与实验结果之间的良好一致性，验证了所提出策略的适用性。其中三个已制造和测试。观察到模拟结果与实验结果之间的良好一致性，验证了所提出策略的适用性。