LIMITATIONS OF SPACE-TIME HARMONICS FOR MICROWAVE AMPLIFICATION
Abstract
The possibility of gain utilizing the interaction between an electromagnetic wave in a smooth wave guide and a space-time harmonic of the slow space-charge wave has been proposed as a method of millimeter-wave amplification. A model is proposed here which satisfies the conditions necessary for the existence of space-time harmonics. This model is an idealization of a tube having two electron beams where the periodic variation of the dc parameters of the inner beam is provided by a bunched hollow outer beam. Since the periodic variation of the inner beam results from the moving electric field of the bunched beam rather than stationary electric or magnetic fields, the device illustrates an application of space-time harmonics rather than space harmonics and introduces a new method of providing the required periodic variations. A small signal analysis of the model leads to vanishingly small expressions for the amplitudes of the n = 1,2,...space-time harmonics, and hence to the conclusion that for the model considered amplification over a wide band of frequencies is not practical.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 14, 1962
- Accession Number
- AD0414369
Entities
People
- J. Horowitz
- T. E. Everhart
Organizations
- University of California, Berkeley