基于压缩感知的天线远场快速测量技术

提出一种应用于天线远场测量系统的压缩感知方法,通过使用正交模拟信息转换(QAIC)结构,可以减少对数据样本的采集,缩短测量时间,并提高天线远场测试效率。为验证系统的准确性,在微波暗室中,测量标准角锥喇叭天线的远场方向图,控制正交模拟信息转换结构的测量数据采样量,低速均匀采样,获取到信号的观测数据,并采用优化算法重构恢复信号。实验表明,该系统在满足一定测量误差的条件下,减少70% 的数据采集量仍能保证测量结果的准确性,较传统暗室测试更高效。

Far-Field Fast Measurement Technology of Antenna Based on Compressed Sensing

The compressive sensing method applied to the far-field antenna measurement system is proposed in this paper, by using the quadrature analog-to-information conversion structure, reduces the number of data samples, shortens the measurement time and the antenna far field test efficiency can be improved. To verify the accuracy of the system, the pattern of a standard pyramid horn antenna in the anechoic chamber antenna is measured, the measurement data sampling amount of the orthogonal analog information conversion structure is controlled, the low-speed uniform sampling is performed, the observation data of the signal is obtained, and the restoration signal is reconstructed by an optimization algorithm. Experiments show that the system can reduce the amount of data collected by 70% and still ensure the accuracy of the measurement result under the condition of satisfying certain measurement error. It is more efficient than the traditional anechoic chamber test.