INVESTIGATION OF LINEAR BEAM AND NEW CONCEPTS OF MICROWAVE POWER. VOLUME II. BEAM-CIRCUIT ACTION.
Abstract
A method is described to improve both the gain and efficiency of conventional klystrons by varying the beam impedance through the change of d-c beam voltage at appropriate locations along the beam. Results are given in both small- and large-signal analyses for two- and three-cavity klystrons with gridded- and gridless-gap resonators. Analytical expressions of beam-loading conductance for a transformed beam interacting with both gridded- and gridless-gap resonators are derived. From small-signal theory the efficiency was found to be directly proportional to M squared/G and the gain to (m sub b M) squared/G (where M is the beam-coupling coefficient, G is the beam-loading conductance, and m sub b is ratio of transformed beam velocity to original beam velocity). This is valid in the large-signal domain, provided that M and G are a-c voltage independent. The large-signal efficiency was found to be dependent on a-c velocity spread only after the transit angle of the output gap decreased to a certain limit. The best location for putting bias was found to be the point of a-c velocity minimum. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1965
- Accession Number
- AD0615939
Entities
People
- James W. Walder
- S. C. Wang
Organizations
- Cornell University College of Engineering