高增益低剖面机场场面监视雷达天馈系统设计

Antenna Feed System Design of High Gain, Low-Profile Surface Movement Radar

文章阐述了一种高增益、低损耗、并馈、圆极化、窄波束、低副瓣,俯仰倒余割平方赋形天线的设计方法,结构紧凑,可靠性高,低剖面。天线尺寸7200mm×600mm,实现增益大于38dB,俯仰赋形区域大于40?,方位3dB波束宽度小于0.35?,副瓣电平小于-27dB,轴比小于1.5dB。

This paper describes an antenna system design of high-gain, low loss, low-profile and circular polarization of surface movement radar(SMR). Possessed with narrow-beam, low-sidelobe, inverse cosec2 shaped pattern on the pitch plane, the antenna has compact structure, high reliability and low profile. The total dimension of antenna is 7200 mm × 600 mm, which could achieve gain higher than 38 dBi at 9.0GHz, shaped pitch plane larger than 40 o, 3d B beamwidth at 9.0GHz at azimuth plane smaller than 0.35 o, sidelobe level lower than-27 dB and axial ratio less than 1.5dB.