| Summary: | A number of experimental travelling wave tubes have been built for operation in the 3.2 centimeter wavelength region, and a series of noise measurements on these tubes has been carried out. The sinusoidal dependence of noise figure on the separation between the electron gun and the circuit entrance of the travelling wave tube has been investigated thoroughly, and various characteristics of these curves, not apparent from previous researches at lower frequencies, have been found and discussed. A new theory, differing considerably from previous noise theories, has been suggested, and comparisons between it and the experimental results obtained in the research show surprisingly good agreement. [...]
|
|---|
