塔康地面设备派生出监视雷达可行性讨论

Feasibility Discussion on Surveillance Radar Derived from Ground TACAN Equipment

本监视雷达测向功能利用塔康导航系统各机载塔康设备发射询问脉冲信号的随机性及非相干性,增加独立于塔康地面设备的信号接收装置;测向天线利用9个垂直极化无反射板水平全向性阵元构成单层圆环阵,装在地面塔康天线顶部,与塔康天线组成整体圆柱阵天线,在塔康设备中增加询问信号的接收和处理电路实现对飞机方位的计算。机载塔康设备间的空空测距功能,为本监视雷达实现地对空逆向测距提供了可能性,其工作波道应是空空测距波道;本监视雷达的测距上行发射询问脉冲由地面塔康发射机在主、辅基准脉冲中后的短暂间隙发射,而其对应的下行应答脉冲由本监视雷达的独立接收信道接收。

The randomness and incoherence of TACAN interrogation pulses are used by the direction finding function ofsurveillance radar, the signal receiver which is dependent form TACAN equipment is added. The direction finding antenna uses ninevertically polarized omnidirectional horizontally non-reflective plate array elements to constitute a single layer circular array,mounted on top of the ground TACAN antenna, combing with TACAN ground antenna as overall cylindrical array antenna. Theinterrogation signals receiving and processing circuit can calculate the direction of airborne TACAN. Air-to-air distance measuringfunction between airborne TACAN equipments makes it possible for ground-to-air reverse distance measuring of the surveillanceradar in the air-to-air operating channel. The uplink interrogation pulses of the surveillance radar will be transmitted in the shortinterval after the main and secondary reference pulses sent from ground TACAN equipment. The corresponding downlink replypulses will be received by the independent channel of the surveillance radar.