短波天线性能无人机测试系统研制与应用

Development and Application of Drone Based Measurement System for Shortwave Antenna Performance

短波天线的尺寸大,天线方向图和增益测量困难。研制的短波天线性能无人机测试系统,利用无人机搭载三轴全向选频式场强仪,在天线远场区,无人机按照规划航线水平或垂直环绕被测天线飞行,自动采集频率、场强,并与经纬度、高程聚合为数据记录,经计算和校准修正后得到天线的方向图和增益等关键性能。系统测量频率范围2~30 MHz,测量灵敏度1 mV/m,各向同性≤1 dB,频率响应≤1 dB;测量比对表明:系统测量电场精度达到±1.5 dB。实测了偶极子天线、单极天线的方向图和增益,经对比,实测与仿真的结果一致性很好,无人机测试系统具有较高的测试精度。

The shortwave-antenna is large in size,and it is difficult to measure its pattern and gain.A drone based measurement system is developed and applied to measure shortwave-antenna performance.A 3-axis isotropic frequency selective electric-field meter is carried by the drone.In the far field area of the antenna,the drone flies horizontally or vertically around the antenna according to the planned flight route,automatically collects frequency and field strength,and aggregates them with latitude,longitude,and elevation into data records.After calculation and calibration correction,the key performances such as the antenna pattern and gain are obtained.The drone based measurement system with measure frequency of 2 MHz to 30 MHz,sensitivity of 1 mV/m,isotropic of≤1 dB and frequency responsitive of≤1 dB.The electric field measurement accuracy of the system is±1.5 dB according to the measurement comparison.The antenna pattern and gain of dipole antenna,monopole antenna is measured by the drones based measurement system,the measure and simulation results are consistent.The drone based measurement system has high test accuracy.