Fast Prediction of Aperture Efficiency and Sidelobe Levels in Shaped Reflector Systems through Model Based Output Space Mapping
Paper i proceeding, 2015

This paper presents a fast method to accurately predict the aperture efficiency and sidelobe levels of shaped dual reflector systems over a wide region of the shaping parameter space. Only a few full evaluations of the system, at different points in the shaping parameter space, are needed to construct the model used for the predictions. The output space mapping technique is used to correct the responses obtained from a simple geometric optics model of the system for any desired point in the shaping parameter space by using the expected aperture edge taper information available from the shaping mapping and the feed pattern. The method is evaluated for a range of feeds, frequencies, and parameter spaces and shown to provide significantly improved results over the geometric optics predictions, while being orders of magnitude faster than full wave or asymptotic methods

radio astronomy

aperture efficiency

reflector shaping.

space mapping

reflector antenna


D. I. L. de Villiers

Universiteit Stellenbosch

Marianna Ivashina

Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk

Rob Maaskant

Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk

9th European Conference on Antennas and Propagation, EuCAP 2015, Lisbon, Portugal, 13-17 May 2015

978-889070185-6 (ISBN)


Informations- och kommunikationsteknik


Elektroteknik och elektronik



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