| 摘要: |
| 对微带Rotman透镜的分析与设计方法进行了研究。针对几个制约微带Rotman透镜性能
的因素，采取了多项改进措施。介绍了一种以平面薄膜电阻为吸收负载的旁壁结构，减少了
透镜的体积和重量。为实现端口最佳波束指向，采用了一种优化的端口结构。采用了一种新
型的传输线结构，消除了传统传输线结构中出现的尖锐拐角，实现了良好的匹配性能。设计
了一个高交叠电平的微带Rotman透镜，分别采用等效口径理论和仿真软件对微带Rotman透镜
进行分析，仿真结果与理论值非常吻合，交叠电平仿真值大于-1.5 dB。 |
| 关键词: Rotman透镜 微带 多波束 交叠电平 改进设计 |
| DOI： |
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| 基金项目: |
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| Analysis and improved design of microstrip Rotman lens |
| LIU Yi-zhi |
| () |
| Abstract: |
| The analysis and design method of microstrip Rotman lens is studied. A
ccording to the factors limiting the performance of microstrip Rotman lens in us
ual design, several measures are presented to improve the performance. First,
a new sidewall absorption structure using planar resistor as absorption load is
introduced to simplify microstrip Rotman lens′ geometry. As a result, the size
and weight are largely reduced. Second, in order to attain the best beam pointi
ng of each port,an improved port structure is adopted. Third, an improved transm
i
ssion line structure is used to eliminate a small angle corner at traditional fe
ed network, which attains good match performance. Finally, a high beam crossover
s microstrip Rotman lens is designed. The lens is analysed using two dimensional
aperture theory and electromagnetic full wave simulated software HFSS.The
analysis results are presented and compared. The comparison shows that simulatio
n results agree well with theory and the simulated beam crossovers is larger tha
n -1.5 dB. |
| Key words: Rotman lens microstrip multiple beam beam crossovers improved design |
《电讯技术》编辑部 