低旁瓣反射面天线设计

Low Side lobe Reflector Antenna Design

摘要:

反射面天线设计在追求高增益的同时,往往也要求天线具有较低的旁瓣水平,以防止对其他系统产生干扰。通过分析不同天线形式反射面天线旁瓣的影响因素,研究了低旁瓣反射面天线设计时参数选取原则和方法,总结了低旁瓣反射面天线的设计方法。给出了一个实际工程应用的超低旁瓣双偏置反射面天线的设计实例和性能仿真计算,天线仿真的口径效率优于59%,旁瓣优于-40dB,验证了分析与设计方法的正确性,该方法可用于指导低旁瓣反射面天线的工程设计。

Abstract:

In the design of reflector antenna, while pursuing high gain, it is often required to have a low side lobe to prevent interference to other systems. By analyzing the influence factors of the antenna side lobe of different antenna forms, the principle and method of parameter selection in the design of low side lobe reflector antenna are studied, and the design method of low side lobe reflector antenna is summarized. A design example and performance simulation calculation of an ultra-low side lobe dual-offset reflector antenna for practical engineering applications is given. This simulation results show that aperture efficiency of the antenna is better than 59% and the side lobe is better than -40dB, which verifies the correctness of the analysis and design method. The method can be used to guide the engineering design of low side lobe reflector antenna.