Sampling Cathode-Ray Tube Device for Microwave Waveform Analysis

This device is to visualize waveform analysis up to mm-waves. The operation is based on two distinctive principles. The first is the sampling of the waveform by a repeated electron beam pulse synchronous with it. The second is the usage of a negative feed back system, which cancells the r.f. deflection of the electron beam pulse by a d.c.control voltage, the latter being proportional to the sampled wave-amplitude and thus giving information to it. The waveform is reproduced by plotting the above control voltage versus the phase position of the sampling. An experimental tube was designed and built to be used up to K-band. It was tested in X-band, and showed good characteristics.