摘要
宽带多波束天线系统广泛应用于电子侦察领域。为了实现宽带、宽角扫描,波束形成网络需采用实时延时单元。针对这一需求,介绍了一个由宽带天线阵列、射频前端和罗特曼透镜等组成的宽带多波束天线系统,详细描述了系统的组成及工作原理、单元设计、副瓣电平仿真、校正和测试。测试结果表明,系统能够实现多波束的小角度扫描,减小扫描波束的灵敏度损失;在8~12GHz频率范围、±27°方位覆盖范围内,多波束的峰值副瓣电平达到-20dB。应用结果表明该系统具有较强的空域抗干扰能力。
Wideband multiple-beams antenna system has been widely used in eiectromc reconnaxssance domain. In order to achieve wideband and wide-angle scanning, beamforming network should use true time delay device. In view of this requirement, a wideband multiple-beams antenna system is proposed, which includes wideband antenna array, RF front-end and Rotman lens, etc. The composition, element design, sidelobe simulation, calibration and testing of system are described in detail. The test results show that the system can achieve small angle scan of multiple-beams, and reduce the sensitivity loss of scan beams. The maximum sidelobes of multiple-beams are less than -20 dB in the range of 8-12 GHz and ±27°scan angle. The application results show that the system has quite strong ability of anti-jamming in space domain.
出处
《雷达科学与技术》
北大核心
2017年第1期81-84,88,共5页
Radar Science and Technology
关键词
罗特曼透镜
宽带
多波束
天线
Rotman lens
wideband
multiple-beams
antenna
