一种便携式微波峰值功率计的设计和实现

Design and Implementation of a Portable Microwave Peak Power Meter

摘要:

针对常用的微波峰值功率计体积大、重量重、携带麻烦、不便于装备现场维修等问题，以AD8317对数功率转换芯片为核心,通过对数射频检波、高速信号采集、信号处理显示等方式设计实现了一种便携式微波峰值功率计。使用校准数据库的方式改善了功率转换芯片的误差,提高了测量频率范围和精度。试验表明，该功率计可以测量频率在2GHz～9GHz、功率0dBm～-50dBm的射频信号峰值/平均功率，同时输出检波波形，测量误差小于1dBm，达到了设计指标要求。在实际应用中，该设备操作简单、携带方便，提高了装备保障的时效性，大大节约了维修成本，具有重要的经济和军事意义。

Abstract:

Aiming at the problems of the commonly used microwave peak power meter, such as large volume, heavy weight, trouble to carry and inconvenient equipment on-site maintenance, a portable microwave peak power meter is designed and implemented with AD8317 logarithmic power conversion chip as the core, through logarithmic radio frequency detection, high-speed signal acquisition, signal processing and display. The calibration database is used to improve the error of the power conversion chip, and the measurement frequency range and accuracy are improved. The test results show that the power meter can measure the peak/average power of RF signal in the frequency range of 2GHz～9GHz and the power of 0dBm～-50dBm, and output the detection waveform. The measurement error is less than 1dBm, which meets the design requirements. In practical application, the equipment is easy to operate and carry, improves the timeliness of equipment support, greatly saves maintenance cost, and has important economic and military significance.