Computer Science – Numerical Analysis
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991itap...39..774f&link_type=abstract
IEEE Transactions on Antennas and Propagation (ISSN 0018-926X), vol. 39, June 1991, p. 774-779.
Computer Science
Numerical Analysis
2
Antenna Design, Antenna Feeds, Antenna Radiation Patterns, Circular Polarization, Cross Polarization, Reflector Antennas, High Electron Mobility Transistors, Microwave Amplifiers, Numerical Analysis
Scientific paper
The beam squint effect appearing in axially symmetric reflector antennas with laterally displaced feeds was investigated. Numerical calculations have been carried out and the beam squint for circular polarized excitation has been measured using a 100-m telescope. The telescope was operated in the Gregorian mode, where the equivalent focal length equals 387.5 m. The feed horn was laterally displaced by 1.364 m from the optical axis at the system focus. Good agreement was obtained between the numerical calculations and the experimental results. The authors found a shift of the two radiation patterns of phi of about 2 arcsec. The orientation of the beam squint in the configuration with a laterally displaced feed is different from the orientation in offset reflector antennas.
Fiebig Dirk
Prata Aluizio
Rusch Willard V. T.
Wohlleben Rudolph
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