扫频式频谱分析仪测量雷达发射功率误差分析

Radar transmitting power measurement and error analysis using a sweep-frequency spectrum analyzer

针对雷达功率测量问题,提出了运用频谱分析仪测量发射功率的方法并对该方法进行了误差分析。首先分析了频域测量发射功率的原理性误差,推导出了理论误差系数并进行了仿真分析,然后通过分析扫频式频谱分析仪的工作原理,列出了影响频谱分析仪实际测量精度的硬件要素,研究了硬件实现中的误差系数,最后得出了该方法测量功率所得结果与实际功率的关系表达式。

In view of the issue of the radar power measurement, a method of measuring the transmitting power through the spectrum analyzer is proposed and the error analysis is also done. Firstly, the theoretical error of measuring the transmitting power in the frequency domain is analyzed, the theoretical error coefficients are derived, and the simulation analysis is done. Secondly, the hardware elements that affect the actual measuring accuracy of the spectrum analyzer are listed through analyzing the working principle of the sweep-frequency spectrum analyzer with the error coefficients in the hardware implementation studied. Finally, the relationship expression between the measuring and actual power is obtained.