The Near Field Radiation Patterns of a Spheroid-Mounted Antenna.
Abstract
An efficient numerical solution for the high frequency near field radiation patterns of a spheriod-mounted antenna is investigated. The Geometrical Theory of diffraction is the basic approach applied here. The ray analysis in the lit region is straightforward; whereas, the geodesic paths on the surface dictate whether the shadow region solution is practical to obtain or not. Previous attempts employing calculus of variations or tensor analysis were too complicated to use. Cylinder and cone perturbation methods are presented to simulate the geodesic paths on a spheroid, which in turn can be used to model an aircraft or missile fuselage. The geodesic paths are then efficiently solved via a numerical approach, in that a cylinder and cone are developed surfaces. This study has presented a very useful solution in approximating the geodesic paths on a spheroid, and predicting the high frequency near field radiation patterns for spheroid-mounted antennas. Using this perturbation approach one can extend this technique to solve for the geodesic paths on more complex convex surfaces. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1980
- Accession Number
- ADA118907
Entities
People
- Haejun Chung
- Ning Wang
- Walter Dennis Burnside
Organizations
- Ohio State University