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为了解决大角度照射下的单侧介质加载的频率选择表面(frequency selective surfaces,FSS)通带高透过率和阻带高反射率要求之间的矛盾,本文采用离散粒子群算法(discrete particle swarm optimization,DPSO)优化设计FSS的周期间隔和图形几何尺寸等多个参数,在通带高透过率和阻带高反射率要求之间寻求一个最优的折衷的设计目标.仿真与试验表明:在TE电波70?照射下,采用DPSO优化出的一个半波壁厚电介质加载的密集型Y环孔径结构,其通带透过率达到80%,阻带透过率低于30%,从而为大角度照射下的天线罩提供一种优良FSS设计结果,并为解决FSS通带高透过率和阻带高反射率要求之间的矛盾提供理论指导.
In order to solve the contradiction between the high passband passband and the high reflectivity of the stopband of frequency selective surfaces (FSS) under single-sided media loading under high-angle illumination, the discrete particle swarm optimization optimization, DPSO) to optimize the design FSS interval and geometric dimensions and other parameters, in the passband high transmittance and stopband high reflectivity requirements to find an optimal compromise between the design goals.From the simulation and experiments show that: Under the irradiation of TE wave 70 ?, a dense Y-ring aperture structure optimized by DPSO with a half-wave wall thickness dielectric is adopted, the passband transmittance of which reaches 80% and the stopband transmittance of less than 30% Radomes at high angles provide a good FSS design result and provide theoretical guidance for resolving the discrepancy between FSS passband high passband and stopband high reflectivity requirements.