车载天线整车测试系统集成与实现

针对自动驾驶、车联网等新技术场景下汽车天线整车性能测试的新需求,借鉴近年来近场测量技术的研究成果,设计采用半球面近场与平面近场相结合的方式,集成了一套汽车天线整车测试系统。系统基于8 m 直径的方位转台实现了中小型汽车的车载天线测试定位,基于12 m 直径的弧形多探头采样架实现了400 MHz~6 GHz工作频段内的车载通信天线半球面近场测试,基于扫描行程为宽3 m 高2.5 m 的单探头采样架实现了6~80 GHz工作频段内的车载雷达天线平面近场测试。在校准场内,以定标喇叭天线作为系统性能验证天线进行远近场测试结果比对。测试结果表明,本系统具备宽频带、多功能、高精度、高效率等特点,是国内测量车载天线的优良实验平台。

Integration and Implementation of Vehicle Antenna Test System

In view of the new requirements of vehicle antenna performance test in new technology scenarios such as automatic driving and vehicle networking, based on the research results of near-field measurement technology in recent years,the design adopts the combination of spherical near-field and plane near-field, and integrates a set of vehicle antenna test system. Based on the 8 m diameter azimuth turntable, the system realizes the test and positioning of the vehicle antenna for small and medium-sized vehicles. Based on the 12 m diameter arc multi probe test stand, it realizes the hemispherical near field test of the vehicle mobile communication antenna in the working frequency band of 400 MHz-6 GHz. Based on the single probe sampling stand with a scanning distance of 2.5 m, it realizes the plane near field test of the vehicle radar antenna in the working frequency band of 6-80 GHz. In the calibration field, the calibration horn antenna is used as the system performance verification antenna, and the near-field test results are compared with those in the calibration field. The test results show that the system has the characteristics of broadband, multi-function, high precision and high efficiency, and it is an excellent experimental platform for measuring vehicle antenna in China.