X波段二维宽带宽扫背腔微带天线

设计了一种X波段背腔微带天线,采用探针和口径耦合相结合的馈电方式实现了小单元间距下单层微带贴片的宽带工作,并弱化了馈线寄生辐射对方向图的扰动。设计加工了8×8单元的天线小阵。实测结果表明,该天线在设计要求的2GHz带宽内驻波小于1.5,驻波小于2的相对带宽25%;方向图测试结果表明实现了方位向45°、俯仰向30°的扫描,增益22.8dB,天线效率大于80%,可满足二维宽带宽扫瓦片天线的实际应用需求。

An X-band back cavity microstrip antenna with wideband and 2D wide scan

An X-band back cavity microstrip antenna is designed. Fed by probe and aperture coupling, the single layer microstrip antenna can work with wideband in compact cell spacing, and the pattern disturbance by radiation of the feeder is weakened. An antenna array of 8 × 8 cells is designed and fabricated. The test results show that the VSWR within the designed 2GHz bandwidth is smaller than 1.5, and the relative bandwidth of the VSWR smaller than 2 is 25%. The patterns test results indicate that the scanning angle is 45° in azimuth and 30° in elevation. The gain is 22.8 dB and the antenna radiation efficiency is better than 80%. This antenna can be applied to the tile antenna with wideband and 2D wide scan.