基于欠采样技术的小型化雷达发射机测试仪

A Compact Radar Transmitter Tester Based on Under-sample Technology

摘要:

针对某型空管二次雷达发射机外场测试中,对测试设备小型化与低成本的要求,文中首先基于软件无线电技术与带通欠采样理论,提出了一种采用低速数字示波卡对特定脉宽调制信号的功率、频率与脉冲包络指标进行快速、低成本测量的方法;然后根据该方法,采用虚拟仪器的思路基于PXI平台构建了小型化的发射机测试仪原型系统;最终在实验室环境下通过对原型系统测量数据的采集和分析验证了方法和设计的有效性。

Abstract:

Aim at the miniaturization and low-cost requirement of test equipment using in the line test for secondary radar transmitter, a test method is provided, which based on a digitizer hardware and adopted the software-defined radio technology and band-pass under-sample theory. Then, according to the method, a prototype system of transmitter tester based on PXI platform of the virtual instrument frame is designed. And the tester is used to power, frequency and envelope measurement for certain pulse modulation signal. Finally, the effectiveness of the method and design is validated by the analysis of prototype system test data under laboratory environment. 