针对近空间飞行器测控的需求,设计了一种Ka频段的宽角覆盖多波束天线。采用方喇叭作为馈源,通过馈源的横向偏焦,实现反射面天线的宽角覆盖;最后,仿真并研制了原理样机,进行了测试。测试结果表明,该多波束天线覆盖了±1.5°以上的空域,且在覆盖区内的增益差小于1.8 dB,实现了对探测空域的宽角高增益覆盖。样机的研制成功为后续的工程优化提供了重要的设计参考。%Aiming at TT＆C demand of near space vehicle, a wide-angle coverage muhibeam antenna is designed for Ka-band in this paper. The present antenna uses square horn as feed. A wide-angle coverage of the reflector antenna is achieved by the offset of landscape orientation. Simulation model and prototype are developed, and the prototype is tested. The test results indicate that the present antenna covers the domain of ± 1.5° and the gain difference in the domain is less than 1.8 dB. The present muhibeam antenna achieves a wide-angle coverage with high gain for covering about the whole detection space. The successful development can provide an important reference for the further optimization design.
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