甚高频滤波器失配导致发射机高频段整机效率过高的原因分析

Analysis of the reason for the very high efficiency of the whole transmitter in its high frequency band caused by VHF filter mismatch

文章主要是研究甚高频滤波器在DF500A型短波发射机中的应用,通过详实的理论和数据分析,确定发射机测试19~26.1 M k Hz时整机效率大于理论值的原因,利用网络分析仪对甚高频滤波器进行时域故障定位,并通过对甚高频滤波器技术改造解决了设备存在的缺陷,为发射机的安全运行提供可靠的技术保障。

This paper mainly studies the application of very high frequency filter type in DF500A shortwave transmitter. Throughdetailed theoretical and data analysis, it determines reasons why the transmitter test MKHz 19-26.1 MKHz machine efficiency is higherthan the theoretical value, makes use of network analyzer to realize time-domain fault location, and reforrns the very high frequency filtertechnology to solve the defects of the equipment, which have provided reliable technical guarantee for sate operation of the transmitter.