论文名称“Active-Isolation Improvement of Shared-Aperture Beam-Scanning Array Based on Excitation Optimization Techniques”，在毫米波共口径相控阵天线中，发射和接收单元之间的平均距离很小。不同阵元之间的强耦合和表面波效应导致不同频段阵元之间的隔离度恶化。在相控阵系统中，为了实现有效的信号传输、接收和处理，需要建立不同的隔离度模型来评估系统性能。本文提出了一种基于激励优化的毫米波共口径相控阵高有源隔离度的实现方法。这种方法可以减少硬件设计的压力。首先提出了一种新的多约束有源隔离度模型。通过提取辐射和有源隔离的共同因子，通过优化阵列单元的激励，在辐射性能不恶化的前提下，实现高的有源隔离度。接着采用多目标优化算法，通过对适应度函数的权重进行评估，并分析优化后的阵列规模等参数的影响，实现多性能的平衡。为了验证该方法的有效性，以一款K/ Ka波段共口径相控阵为例，优化后，发射阵列与接收元件在整个扫描范围内的隔离度高于40dB，发射阵列与接收阵列在整个扫描范围内的隔离度高于50db。工作主要完成人：侯惠颖，程钰间。

论文链接：https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10328865

Abstract— In this letter, a methodology based on the excitation optimization technique is proposed to increase the array isolation in a shared-aperture beam-scanning array. A multiple-constraint active isolation model is proposed to comprehensively reflect the isolation between the transmitting and receiving arrays. The first constraint condition in such a model ensures that the receiving channels are not this letter, a oversaturated by the energy coupling from the transmitting array. The second constraint condition ensures that the receiving signal is large enough to suppress noise interference. By only optimizing the excitation of array elements while preserving the radiation performance, the active cancellation can be implemented to improve the hybrid active isolation. To validate this method, a K/Ka dual-band dual-circular-polarized shared-aperture beam-scanning array is designed to achieve the active isolation better than 50 dB throughout the scanning range of ±50°.

Index Terms— High isolation, multi-objective optimization algorithm, transmitting and receiving shared-aperture beam scanning array.