Low Frequency End Performance of a Symmetrical Configuration Antenna for the Square Kilometre Array (SKA) |
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| Authors: | Germán Cortés-Medellín |
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| Institution: | (1) National Astronomy and Ionosphere Center, Cornell University, New York, U.S.A. |
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| Abstract: | The frequency specifications of the Square Kilometre Array (SKA) call for an optimum operation of the antenna elements from 25 down to 100 MHz. The current 12 m diameter US-SKA design is specified from 500 up to 25 GHz, with an upper goal of 35 GHz. At the low frequency end of the band (i.e., 100 MHz), a 12 m reflector antenna is about four wavelengths in diameter. Then, the question is: how well can you do, at this low frequency end of the specified band of operation for the SKA, with a symmetric reflector configuration using an ultra-wide-band prime focus feed? This paper presents the analysis of the antenna performance, in terms of A eff/T A, of three symmetric configurations of the 12 m US-SKA antenna design between 100 and 200 MHz. |
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| Keywords: | low frequency SKA Square Kilometre Array symmetric Gregorian antenna |
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