Oxide Cathode Coating Impedance
Abstract
Experimental determination of the impedance characteristics of a cut- off ideal parallel plane diode and an analysis of the results obtained have demonstrated the importance of the characteristics of the oxide coated cathode on tube behavior at high frequencies. Based upon the fundamental field equation and guided by the experimental results, the impedance of the oxide coating has been derived. The analysis shows that the impedance properties of the coating are governed by the effective conductivity, the effective dielectric constant, and the effective Maxwell time of relaxation of the coating. These are properties influenced by the chemical composition of the coating and its physical characteristics as well as by temperature and frequency of operation. Suggestions as to further experimentation are given as well as some discussion on the influence of the impedance of the oxide coating on the impedance properties of tubes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 14, 1948
- Accession Number
- AD0495286
Entities
People
- G. C. Dalman
- H. J. Miller
Organizations
- New York University Tandon School of Engineering