Investigation of Microwave Circuits That Are Suitable for Application to Integrate with the Prasad-Leibys' Plasma Millimeter Wave Tube,
Abstract
It is the purpose of this research study to investigate theoretically several microwave circuits which are suitable to integrate with a beam-plasma millimeter wave tube, and the problems associated with them. Three microwave structures have been studied: (1) The hollow dielectric tube waveguides, (2) The cylindrical metal waveguide partially filled with a coaxial dielectric tube, and (3) The hollow dielectric tube waveguide supported by a conducting cylinder. They all employ dielectric tube as their basic element, and they all operate in the circularly symmetric transverse electric modes. The field problems have been solved and the resulting transcendental mode equations are solved graphically in conjunction with their respective dispersion relations. It is found that a critical frequency exists for all three structures, and below which no propagation waves can take place. As a circuit element or cavity both types I and II structures show to have the very desirable property of confining, and re-directing the emitted electromagnetic radiation from the plasma tube. More than that of both these structures are capable of single mode operation at very short wavelengths. It is a surprise to find that when type II structure is operated at the very high frequency mode, the structure behaves as if it is a dielectric tube waveguide, limited on the outside by a conducting surface of the cylindrical metal wall, and on the inside by a medium of small dielectric constant.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 15, 1979
- Accession Number
- ADA074988
Entities
People
- Hsu Tse-wen
Organizations
- Villanova University