Accession Number : ADP007446

Title :   Short Backfire Antenna Modeling With Dipole or Waveguide Excitation,

Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s) : Otto, G. P. ; Lu, C. ; Chew, W. C.

Report Date : FEB 1992

Pagination or Media Count : 14

Abstract : A three-dimensional short backfire antenna structure with circular symmetry is modeled using the mode matching method and the vector Hankel transform. The excitations considered are thin wire dipole antennas and flush waveguide feeds. The efficiency of computation can be increased by ignoring the higher order harmonics in the model. Then this model is used to design a structure with a larger directivity than previously reported. Theoretical predictions of the radiation pattern yield good agreement with measurements performed on a prototype. In addition, this model could be modified to approximate rectangular waveguide excitations or corrugated cavities.

Descriptors :   *ANTENNAS, *BACKFIRE ANTENNAS, *CIRCULAR ANTENNAS, AGREEMENTS, CAVITIES, CIRCULAR, COMPUTATIONS, DIPOLE ANTENNAS, DIPOLES, EFFICIENCY, HARMONICS, MATCHING, MEASUREMENT, MODELS, PATTERNS, PREDICTIONS, PROTOTYPES, RADIATION, RADIATION PATTERNS, STRUCTURES, SYMMETRY, THREE DIMENSIONAL, WAVEGUIDES, WIRE, YIELD.

Subject Categories : Electrical and Electronic Equipment
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE