大入射角双极化频率选择表面设计

Design of dual-polarization Frequency Selective Surface for large-angle incidence

摘要:

频率选择表面(FSS)在多频接收系统中具有广泛的应用，并在不少情形下需要大角度入射和分极化接收。采用十字金属线和贴片设计了一款双极化工作的FSS，能够实现在45°角入射的情况下，透射(55±5) GHz、同时反射(33±5) GHz的信号；且透射的(55±5) GHz信号为垂直极化，反射的(33±5) GHz信号为平行极化，实现了双频带和双极化接收。利用印制电路板技术对该FSS进行样品加工，采用自由空间法进行测试。测试结果与仿真结果具有很好的吻合度。

Abstract:

Frequency Selective Surface(FSS) has been widely used in many multi-channel receiving systems, where large angle incidence and multi-polarization receiving are required in many cases. A frequency selective surface is designed using a cross-dipole combined with a square patch to transmit (55±5) GHz and reflect (33±5) GHz signals. The signal for (55±5) GHz is in perpendicular polarization, and for (33±5) GHz it is in parallel polarization. The prototype is fabricated using Printed Circuit Board(PCB) technology and measured by free space method. It is demonstrated that good agreement with simulation is obtained.