TRANSVERSE ANTENNA FEED STUDY.
Abstract
The report summarizes the results of an experimental and theoretical investigation of the transverse focal region fields of a Cassegrain antenna. The ultimate goal is the development of distributed feed systems capable of improving the transmission and reception properties of reflector antennas. A prototype Cassegrain microwave antenna, which was sufficiently flexible to provide a variety of focal field distributions and a feed system capable of bing conjugate matched, was constructed and tested. Focal region fields due to scanned incoming plane waves and also reflector distorted on-axis waves were both measured and conjugate matched. As evidenced by the Fraunhofer patterns, aberrations caused by beam scan or reflector distortion were significantly reduced. Geometrical and physical optics methods were used to calculate the fields on the subreflector and the latter used to obtain the fields in the system focal region. The experimental and analytical results are presented in a series of curves. A general formulation of the feed network was made and a method for its realization indicated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1966
- Accession Number
- AD0629546
Entities
People
- L. I. Smilen
- P. C. Loux
- R. W. Martin
Organizations
- Sperry Corporation