Accession Number : AD0634792

Title :   DIELECTRIC WAVEGUIDES AND RADIATORS.

Descriptive Note : Doctoral thesis,

Corporate Author : DEFENSE RESEARCH LAB UNIV OF TEXAS AUSTIN

Personal Author(s) : McKinney,Chester M. , Jr

Report Date : SEP 1950

Pagination or Media Count : 282

Abstract : The work which is described in this dissertation consisted of an experimental investigation of the properties of the dielectric waveguide and radiator of circular cross section. Part One is a description and discussion of the metal waveguides and mode exciters used in this project. The designs of three new types of mode exciters are described. These exciters are for the TM sub 01 and TM sub 11 modes in metal waveguides of circular cross section and for the TE sub 20 mode in waveguides of rectangular cross section. Part Two covers measurements made on dielectric rods used as waveguides and is principally a collection of data that were obtained in order to check existing theoretical calculations. In particular, measurements were made on dielectric rods of sufficiently large diameter to support the second order radial modes of propagation. Attenuation measurements were made as a function of the diameter of the rods and also as a function of a bending of the rods. Part Three constitutes the major part of the work and consists of measurements made on dielectric radiators. It is believed that this is the first investigation of dielectric rod antennas excited in the TM sub 01, TE sub 01, and EH sub 11 modes.

Descriptors :   (*WAVEGUIDES, DIELECTRICS), (*DIELECTRICS, RADIO TRANSMISSION), (*ANTENNAS, DIELECTRICS), RODS, ANTENNA RADIATION PATTERNS, PROPAGATION, ATTENUATION, MEASUREMENT, EXPERIMENTAL DATA, THEORY, GAIN

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE