低副瓣多波束Rotman透镜天线设计  

A Low Sidelobe Rotman Lens Antenna with Multi-beam

作　　者：李峰[1] 刘熠志[1] 

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《电讯技术》2011年第10期92-98,共7页Telecommunication Engineering

摘　　要：设计了一个工作于Ka频段的16波束H面波导结构低副瓣多波束Rotman透镜天线。各相邻波束间隔小于半功率波束宽度。采用相邻波束副瓣对消的原理实现了降低副瓣目的。实测结果表明,与未采取对消的天线相比,天线副瓣电平平均降低了10 dB。给出了H面喇叭激励下透镜内电磁场计算公式及阵列轮廓的截获损耗。螺钉移相器的应用缩小了透镜天线尺寸。A low sidelobe Rotman lens antenna is developed which operates at Ka band with 16 beams. The angular interval between beams is smaller than half power beam width. It is structured with H - plane waveguide. The sidelobe is reduced by canceling patterns of adjacent two beam ports. Test result shows that the sidelobe is reduced about 10dB compared with no canceling measure. The formula of radiating field in the lens cavi .ty which is made of two metal parallel plates by the H - plane horn is given. The intercepted loss by the contour of array ports is computed. The scale of lens is reduced obviously by application of metal posts phase shifter.

关 键 词：多波束天线 ROTMAN透镜 波导 螺钉移相器 低副瓣 KA频段 

分 类 号：TN823[电子电信—信息与通信工程]