Title :
A survey of the effects of reflector surface distortions on sidelobe levels
Author_Institution :
CSIRO Div. of Radiophys., Epping, NSW, Australia
Abstract :
A survey of the literature relating to the effects of reflector surface distortions is presented, with particular attention to the Zernike-mode method of describing distortions and calculating the resultant radiation patterns. The errors are classified on the basis of whether they are random or systematic, since that is what determines the method of treatment. Systematic errors are further classified as periodic or nonperiodic. The results of studies into sidelobes generated by periodic surface distortions call into question the suitability of the current method of sidelobe envelope specification.<>
Keywords :
antenna radiation patterns; error analysis; reflector antennas; Zernike-mode method; nonperiodic errors; periodic errors; radiation patterns; random errors; reflector antennas; reflector surface distortions; sidelobe envelope specification; sidelobe levels; systematic errors; Antenna radiation patterns; Apertures; Degradation; Noise reduction; Performance gain; Receiving antennas; Reflector antennas; Rough surfaces; Surface roughness; Surface treatment;
Journal_Title :
Antennas and Propagation Magazine, IEEE
