Cost Effective Frequency Ranges for Multi-Beam Dishes, Cylinders, Aperture Arrays, and Hybrids

  • Jaap D. Bregman
Chapter

Abstract

Five out of six Square Kilometre Array (SKA) science programs need extensive surveys at frequencies below 1.4 GHz and only four need high-frequency observations. The latter ones drive to expensive high surface accuracy collecting area, while the former ask for multi-beam receiver systems and extensive post correlation processing. In this paper, we analyze the system cost of a SKA when the field-of-view (Fov) is extended from 1 deg2 at 1.4 GHz to 200 deg2 at 0.7 GHz for three different antenna concepts. We start our analysis by discussing the fundamental limitations and cost issues of wide-band focal plane arrays (FPA) in dishes and cylinders and of wide-band receptors in aperture arrays. We will show that a hybrid SKA in three different antenna technologies will give the highest effective sensitivity for all six key science programs.

Keywords

aperture efficiency field-of-view focal plane arrays foreshortening efficiency system optimization 

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References

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Copyright information

© Springer 2005

Authors and Affiliations

  • Jaap D. Bregman
    • 1
  1. 1.ASTRONDwingelooThe Netherlands

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