Microwave valves: a survey of evolution, principles of operation and basic characteristics
C.H. Dix, W.E. Willshaw · Journal of the British Institution of Radio Engineers · 1960
After a brief description of the evolution of the different classes of microwave valves, the principal modern types are discussed under the headings of their mode of operation : ‘O’ type interaction, ‘M’ type (crossed field), variable reactance amplifiers; and the maser. A brief survey is given of the performances obtained. 89 references.