| 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
。 |
| 关键词: 多波束天线 Rotman透镜 波导 螺钉移相器 低副瓣 Ka频段 |
| DOI： |
|
| 基金项目: |
|
| A Low Sidelobe Rotman Lens Antenna with Multi-beam |
| LI Feng,LIU Yi-zhi |
| () |
| Abstract: |
| A low sidelobe Rotman lens antenna is developed which operates at Ka band with 1
6
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 th
e sidelobe is reduced about 10dB compared with no canceling measure. The formula
of radiating field in the lens cavity which is made of two metal parallel plate
s 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 meta
l posts phase s
hifter. |
| Key words: multi-beam antenna Rotman lens waveguide posts phase shifter low sidelobe Ka band |
