曲率对曲面FSS传输特性的影响

When Frequency selective surface (FSS) is exposed to the uneven irradiation of antenna, the transmission characteristics is easy to be instable. In this paper, a kind of cylinder FSS structure is designed and the influence of curvature on transmission characterisitcs has been researched under the cylinder FSS strucutres composed of ring-type,cross-type and Y-type unit respectively by means of finite difference time domain (FDTD). The results show that with the decrease of radius of curvature, the frequency point of cylinder FSS drifts to the low frequency point and the transmittance decreases; furthermore the Y-type unit shows the relatively stable characteristics.