无线超压测试系统平地天线传输性能研究

针对冲击波测试的高效、准确和安全性需求，利用4G无线通信技术和存储测试方法研制出一套无线冲击波超压测试系统.开展了平地天线传输性能研究，建立了表征参考信号接收功率与任意传输距离关系的自由空间修正模型.验证实验结果表明，理论值与实验值吻合良好，参考信号接收功率随着传输距离的增大而减小.在一定范围内，平地影响因子随着接收端天线高度的增大而减小，自由空间传输路径损耗随之减小，而参考信号接收功率随之变大. 

Research on Transmission Performance of Ground Antenna in Wireless Overpressure Test System

In response to the requirements for efficiency, accuracy and safety of shock wave testing, a wireless shock wave overpressure test system was developed by using 4G wireless communication technology and storage testing methods. A study on the transmission performance of ground antennas was carried out, and a free-space modified model was established, which characterizes the relationship between the reference signal received power P_RSR and any transmission distance L. The experiment results show that the theoretical value is in good agreement with the experimental value, and the P_RSR decreases with the increase of L. Within a certain range, the ground influence factor ω decreases with the increase of the antenna height at the receiving end, the free space transmission path loss L_F decreases and the P_RSR increases accordingly.