Analysis on the Significant Improvement of Radiation Performance and the Adjustment Effect of S-Type Glide Path Antenna

Both the S-type glide antenna and the M-type glide antenna consist of three antennas: upper antenna, middle antenna, and lower antenna. There are significant differences in the radiation signals of the two types of antennas. Based on the theoretical basis of antenna excitation amplitude, phase, and electromagnetic radiation characteristics, a three-dimensional space radiation mathematical model is constructed. Firstly, the basic signal radiation characteristics of the S-type antenna are analyzed theoretically based on the signal principle and feed method, with the results compared to those of the M-type. Then, from the perspective of antenna parameter adjustment according to the flight checking procedure and sampling rules, the changes in threshold crossing height (TCH), glide path angle, and symmetry of signal are calculated by signal simulation. Further analyze the variation patterns and trends of the above parameters through dynamic analysis of antenna adjustment. This visually demonstrates the high performance and good adjustability of the S-type antenna. 新型S型下滑天线与M型下滑天线都是上中下三个天线构成，而两种天线辐射信号存在着明显的差异，以天线激励振幅和相位及电磁辐射特性为理论依据，构建三维空间辐射数学模型，先从理论上分析S型天线的基本信号辐射特征，与M型天线展开差异性分析。进而从飞行校验的天线参数调整视角出发，根据飞行校验程序及采样规则，通过信号模拟计算出：入口高度，下滑角，信号对称性参数，进一步通过对天线调试动态分析以上参数的变化规律与趋势，以可视化方式体现出S型天线的高性能和良好的可调性。