一、引言众所周知,在电子直线加速器的盘荷波导结构中,工作频率是所有物理参数中最重要的参数之一。因此在微波冷测中把频率测量放在很重要的地位。文章[1]用谐振频率法对电子直线加速器盘荷波导结构的频率进行了测量,由于该法的线路使用示波器显示及440 I. INTRODUCTION As we all know, in the linear accelerator of the disk load waveguide structure, the operating frequency is one of the most important parameters of all physical parameters. Therefore, the cold measurement in the microwave frequency measurement on a very important position. The article [1] measured the frequency of the electronic linear accelerator disk-loading waveguide structure by using the resonant frequency method. Since the circuit of this method is shown using an oscilloscope and 440