面向干涉仪系统的一种近场测试方法

A Near-Field Test Method for Interferometer System

针对干涉仪体制测向系统,提出了一种近场测试方法。该方法利用相控阵波束扫描原理设计测试天线阵,通过控制入射到干涉仪系统每个天线阵元的信号相位,等效出远场测试条件,准确地完成干涉仪系统的校准和测向验证,等效误差满足测试要求。相比传统的远场测试方法,该方法测试速度快、精度高、易于操作。工程实现表明,该方法具有良好的适用性,可广泛用于干涉仪体制测向系统的外场快速校准测试。

As to direction-finding system for interferometer, a near-field testing method is proposed. With the principle of phased array beam scanning for designing a test antenna array, far -field conditions could be achieved for interferometer calibrating and direction-finding verifying, through controlling the phase of radiation signal of each channel. In comparison to traditional approaches, the proposed method is faster, more accurate and manoeuvrable. As shown by engineering development, the method is highly applicable and can be widely applied in calibration and testing of interferometer in the field.