Fresnel Zones for Ground-Based Antennas.
Abstract
The ordinary Fresnel zone concept is extended to include the influence of finite con ductivity. This is important for ground-based antennas because the influence on the radiation pattern of irregularities near the antenna is determined by the amplitude and phase of the groundwave. Only discontinuities of the elec trical parameters of the ground are considered. Extensive numerical results for the first Fresnel zone are given, and it is shown that the zone is much smaller for a finite conductivity than for an infinite conductivity, especially for small angles of elevation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1963
- Accession Number
- AD0418334
Entities
People
- J.bach Andersen
Organizations
- Technical University of Denmark