纵向槽和径向槽组合波纹喇叭馈源的优化设计

研究了纵向槽和径向槽组合的波纹喇叭馈源的优化设计方法.基于旋转体时域有限差分算法分析波纹喇叭的性能，结合协方差矩阵自适应进化策略，以天线口径效率为目标，优化设计了一款Ku频段波纹喇叭馈源，并加工和测试了馈源样机.计算与实测结果表明，在10.7~12.75 GHz频带内，该喇叭具有良好的阻抗匹配和辐射特性，应用于标准卡塞格仑天线时，天线口径效率优于78%，验证了这种优化设计方法的有效性.

Design and optimization of a corrugated horn feed with axial and radial slots

The optimization method of horns that combine axial and radial slots was studied. Body of revolution finite difference time domain algorithm was applied in analyzing horns. A corrugated horn working in the Ku band was designed and optimized using covariance matrix adaptation-evolution strategy for better aperture efficiency. The optimized horn was fabricated and tested. Simulated and measured results show a good agreement in both impedance matching and radiation patterns in 10.7-12.75 GHz. The aperture efficiency is better than 78% with the feed illuminating a classical Cassegrain antenna, which proves the effectiveness of this optimization method.