Electrically Small Antennas
Abstract
Work is described on developing theory and techniques for small antennas mounted on structures, for printed-circuit antennas, and for K-pulse application. The electromagnetic theory was developed for a horizontal cylindrical structure in the presence of a horizontal dielectric interface. The cylindrical structure may be a conducting body or a concentric dielectric multilayer. It may represent a thick cylindrical antenna, a structure on which the antenna is mounted, or part of the environment in which the antenna operates. The horizontal dielectric interface may represent the air-earth interface, or it could be grounded dielectric substrate such as the microstrip antenna environment. The cylindrical structure may be located either in the dielectric region or in the air. The antenna or source may be located in the dielectric, in the air, or on the interface. The field is expressed as a continuous or discrete spectrum of TE and TM cylindrical waves. Using the wave transformations and the boundary conditions at the planar dielectric interface, integral and asymptotic expressions were developed for the cylindrical-wave couplings introduced via reflection at the interface. Computer subroutines were developed for these fundamental quantities. Applications for this development include microstrip antennas and buried or hardened antennas.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1982
- Accession Number
- ADA228731
Entities
People
- C. H. Walter
- Jack H. Richmond
- Leon Peters Jr.
Organizations
- Ohio State University