RAY-THEORY ANALYSIS OF DEFOCUSED CIRCULARSYMMETRIC REFLECTOR ANTENNAS,
Abstract
Radiation patterns for narrow-beam reflector antennas operating near focus have been analyzed using standard aperture integration techniques. For the highly-defocused case, these techniques are more restricted and generally more difficult to apply. For this case, it is shown that ray-theory provides a good means of predicting radiation characteristics. Three methods for determining far-field amplitude and phase characteristics are presented. The first is the standard aperture integration method; the second employs ray-theory principles; and the third uses a ray-theory simplification, namely paraxial theory. An attempt is made to determine the amount of defocusing required in order that ray-theory rechniques are applicable. The paraboloidal reflector and Cassegrain are the antenna types discussed. The methods presented, however, can be applied to any circularlysymmetric reflector antenna. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 10, 1963
- Accession Number
- AD0426029
Entities
People
- Alfred R. Lopez