An Analysis of the Fresnel Region of a Large Parabolic Communication Antenna with the Scalar Diffraction Theory,
Abstract
Spacecraft antennas that are very large in terms of a wavelength present special problems after they are installed on the vehicle in that final tests to verify that no changes in the antenna performance have occurred during storage, handling, and installation can seldom be performed under far-field conditions. This report investigates the feasibility of making final measurements at distances that would be practical in typical assembly buildings. The data channel patterns and tracking patterns of a typical parabolic reflector communications antenna in the radiating near-field region are examined in this report using the Fresnel approximation to the scalar diffraction theory.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1974
- Accession Number
- ADA008509
Entities
People
- Michael T. Tavis
Organizations
- The Aerospace Corporation