The method of geometrical optics approximation for solving the problem of dual-reflector antenna radiation characteristics optimization
DOI:
https://doi.org/10.1109/ICATT.1995.1234126Abstract
Many of types of dual-reflector antennas are used today. The problem of obtaining special antenna characteristics with the small side and back radiation and the possibility of varying the positions of radiation extremums is very important.
Therefore the challenges of practical engineering designs call for the development of asymptotical methods of the wave diffraction theory. However using these methods is often difficult, even if numerical approaches are used.
That is why an attempt of developing a method of engineering modelling of dual-reflector antennas based on the metrical optics approximation. This method enables one to clarity the principles of forming the polarization structure of radiation field depending on the amplitude-phase distribution at the feed aperture, at the counter-reflector, and on the geometry of the whole antenna system as well.
The paper presents the results of experimental research the Cassegrane antenna with different ratios of reflector diameters, and the algorithm and results of numerical modeling aimed at optimization of antenna parameters.
