| 摘要: |
| 龙伯透镜天线表面放置多个馈源即可在同一频段或跨频段同时产生多个扫描波束跟踪多个目标，针对这一特点，设计了适用于C频段无人机中继数据链的紧凑多波束平板透镜天线。采用矢量球面波函数展开法结合差分进化算法优化设计透镜天线，仿真分析了单个Vivaldi天线照射3层直径160 mm平板透镜天线，天线增益优于传统均匀分层的透镜天线。同时，采用16个Vivaldi天线组成半圆环阵照射平板透镜天线，通过扫描波束的馈电切换，实现宽角范围的多波束覆盖。仿真结果表明：平板透镜天线在宽频带（5.5～9.0 GHz）内具有良好的多波束辐射特性。 |
| 关键词: 无人机中继数据链 平板透镜天线 龙伯透镜 多波束天线 差分进化算法 |
| DOI： |
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| 基金项目:国家科技攻关计划项目;国家重点基础研究发展计划(973计划)项目 |
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| A multi-beam planar lens antenna for UAV relay datalink |
| HUANG Ming,HUANG Xiuqiong,REN Ran |
| () |
| Abstract: |
| Due to attractive features of Luneberg lens antenna(LLA) for launching multiple scanning beams to track multi-target simultaneously over the same frequency band or multi-band by positioning multiple feeds at the periphery of the lens,a compact multi-beam planar lens antenna(LA) for the C band Unmanned Aerial Vehicle(UAV) relay datalink is presented in this paper.The vector spherical wave function expansions(VSWE) combined with differential evolution algorithm(DEA) is adopted for the optimal design of LA. Moreover,the radiation performance of the optimized 3-layer 160 mm diameter planar LA fed by a Vivaldi antenna is simulated and compared with that of uniform LA,higher directivity is obtained. Additionally,this lens can be used to yield multiple beams and wide scan coverage by implementing a semi-circular array of 16-element Vivaldi antennas at the periphery of the lens and switching among the feed antenna elements. The simulation results show that the planar LA exhibits good multiple-beam radiation characteristics over 5.5~9.0 GHz. |
| Key words: UAV relay datalink planar lens antenna Luneberg lens multi-beam antenna differential evolution algorithm |
