高功率超宽带双馈源抛物面天线设计与仿真  

Design and simulation of a wide-beam high-power paraboloidal antenna with dual-source

作　　者：郭晨[1] 张安学[1] 吴辉[1] 蒋延生[1] 汪文秉[1] 

机构地区：[1]西安交通大学微波与光通信研究所,陕西西安710049

出　　处：《电波科学学报》2008年第4期658-661,共4页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(60501004)

摘　　要：各种超宽带(UWB)及高功率应用中对天线辐射功率及辐射方向性需求不同。针对增大抛物面天线主轴前向辐射功率及改善方向性等问题,提出了一种双馈源半抛物面脉冲辐射天线。通过对多种馈电方式进行仿真和性能比较,得到一种辐射性能相对较优的双馈源焦距内馈电方式抛物面天线。仿真结果表明:这种由两个TEM喇叭辐射单元同时向抛物面馈电构成的反射面天线可以在抛物面口径内进行功率合成,形成峰值功率更高的电磁脉冲,以改善天线主轴方向的辐射增益及方向性。The reflector Impulse Radiating Antennas （IRAs） and the TEM horn antennas have been used extensively for Ultra-Wideband （UWB） and high power applications. To obtain more radiating gain on bore-sight of paraboloid reflector and centralized radiating direction, a novel feeding structure which called dual-TEM sources has been designed and applied in half-paraboloid reflector IRA application. Simulation and comparisons have been done in different feeding models to summarize a relative optimal feeding structure. Simulation results proved that this proposed half-paraboloid reflector IRA with dual TEM sources provided with greater radiation performance on bore-sight as a result of the synthesized power in the aperture of paraboloid space.

关 键 词：高功率 超宽带(UWB) 脉冲辐射天线(IRA) 时域有限差分(FDTD) TEM喇叭天线 双馈源 半抛物反射面 

分 类 号：TN82[电子电信—信息与通信工程]