On the use of antenna weight functions in field strength prediction and interference reduction

  • M. A. J. van de Griendt
  • G. A. J. van Dooren
Article
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Abstract

In this paper two methods for calculating the received electromagnetic field by a single-parabolic reflector antenna in the shadow region behind a finite-width screen are proposed and analysed. The first one is referred to as the far-field approach and treats the obstacle and reflector antenna diffraction separately. The antenna simply is replaced by a point source having the receiving properties of the reflector antenna considered. The second method is called the near-field approach and considers the combined effect of obstacle and antenna diffraction. It is shown that considerable differences between the results of both methods may exist, even for an obstacle-antenna separation large compared to the Rayleigh distance of the antenna, and both for a CW and broadband analysis of the communications channel. It is concluded that the near-field method gives the best results and can be applied to many practical problems such as interference reduction and searching the optimal position of VSATs in urban environments.

Keywords

Combine Effect Field Strength Weight Function Point Source Electromagnetic Field 

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References

  1. [1]
    Kouyoumjian R.G. and P.H.Pathak, A UNIFORM GEOMETRICAL THEORY OF DIFFRACTION FOR AN EDGE IN A PERFECTLY CONDUCTING SURFACE,Proc. IEEE, vol. 62, no. 11, 1974, pp. 1448–1462.Google Scholar
  2. [2]
    Van de Griendt, M.A.J., SITE SHIELDING OF A PARABOLIC REFLECTOR ANTENNA BY A FINITE-WIDTH SCREEN, Training report, Eindhoven University of Technology, Telecommunications Division, 1993.Google Scholar
  3. [3]
    Van Dooren G.A.J. and H.J.F.G.Govaerts, OFF-AXIS RADIATION-PATTERN CALCULATION OF A CASSEGRAIN ANTENNA SYSTEM WITH AN APPLICATION TO SITE SHIELDING,Proceedings of the 8th International Conference on Antennas and Propagation 1993, Edinburgh, part 2, pp. 2.631–2.634.Google Scholar
  4. [4]
    Van Dooren G.A.J. and H.J.F.G.Govaerts, SHIELDING OF SINGLE- AND DUAL-REFLECTOR EARTH-STATION ANTENNAS: A NEAR- AND FAR-FIELD APPROACH,IEE Proceedings, part H, to appear.Google Scholar

Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • M. A. J. van de Griendt
    • 1
  • G. A. J. van Dooren
    • 1
  1. 1.Faculty of Electrical Engineering Telecommunications DivisionEindhoven University of TechnologyEinghovenThe Netherlands

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