零点填充技术在单脉冲阵列天线中的应用

Use of Zero-Point Filling Technique in Mono-Pulse Antenna Array

设计了一种八单元L波段零点填充单脉冲阵列天线,该天线采用双层空气微带形式展宽带宽,通过一分八的合差网络对天线进行馈电,天线的测试与仿真结果有较好的一致性,测试结果表明,该天线在1.03-1.09GHz驻波均小于1.5,方位面形成低副瓣的和差波束,俯仰面具有零点填充赋形特性。最大增益为21d B。分别对串馈与并馈形式阵列天线进行了加工和测试,着重探讨了单元串馈与并馈形式对整体天线性能的影响。

A mono-pulse antenna utilizing Zero-point Filling Technique is proposed in this letter.The antenna is adapted double-layer patch loaded by air to broaden bandwidth.The antenna is fed by one to eight difference and sum feeding network.The antenna is fabricated and measured.The measured results show good agreement with simulated results.The vswr of the antenna is less than 1.5 over 1.03-1.09 GHz.The radiation pattern in azimuth plane with low side lobe while in elevation plane the zero point is filled.The measured maximum gain is 21 d B。This paper also analyze the difference between series fed and cross fed antennas.Two types of antennas is fabricated and measured.