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- Numerical Check of GTD Near-Field Calculations for the Meteosat Satellite | TICRA

Near field Optimization Physical Optics Reflectarray Reflector antenna Scattering Numerical Check of GTD Near Field Calculations for the Meteosat Satellite Abstract The near field and the far field patterns from the high gain S band antenna on the METEOSAT are calculated by the geometrical theory of diffraction The far field is transformed into the near field through an expansion in spherical har monics The resulting transformed field agrees well with

Original URL path: http://www.ticra.com/papers/numerical-check-gtd-near-field-calculations-meteosat-satellite (2016-05-01)

Open archived version from archive - On the Number of Modes in Spherical Wave Expansions | TICRA

given by N kr o 10 being the wavenumber and r the radius of the minimum sphere The almost explosive development in computer speed and storage capacity witnessed during the last two decades has made transformations of fields from antennas exceeding thousands of wavelengths feasible and a closer investigation of the above expression seems to be appropriate An improved expression for the number of modes N related to the antenna

Original URL path: http://www.ticra.com/papers/number-modes-spherical-wave-expansions (2016-05-01)

Open archived version from archive