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Beamsteering for Non-uniform Weighted Array-Fed Reflector Antenna

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Abstract

In this paper, a beamsteering scheme for an array-fed paraboloid reflector antenna is proposed. In this method, a non-uniform amplitude weighting strategy is used in order to demonstrate an offset fed for the reflector antenna. Steered beam is kept in shape in terms of half power beam width (HPBW) and relative side lobe level (RSLL). To do so, an analytical derivation of beam pattern is performed for the array-fed reflector antenna. Two standard non-uniform weighting techniques, Binomial and Dolf-Tschebyscheff, are employed for this reason. Finally, a multi-object optimization method is proposed to provide the best weighting. The computer simulations are performed for different multi-object optimization scenarios. The results reveal an improvement beam shape in terms of HPBW and RSLL traditional non-uniform weighing methods.

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Notes

  1. Note that using a phased array antenna as the reflector antenna feed, i.e. phase shift only and uniform weighting, we can not build a beamformer.

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Authors and Affiliations

  1. Faculty of Electrical and Computer Engineering, University of Sistan and Baluchestan, Zahedan, Iran

    M.-M. Tamaddondar, H. Keshavarz & J. Ahmadi-shokouh

Authors
  1. M.-M. Tamaddondar
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  2. H. Keshavarz
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  3. J. Ahmadi-shokouh
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Correspondence to J. Ahmadi-shokouh.

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Tamaddondar, MM., Keshavarz, H. & Ahmadi-shokouh, J. Beamsteering for Non-uniform Weighted Array-Fed Reflector Antenna. Wireless Pers Commun 97, 5511–5525 (2017). https://doi.org/10.1007/s11277-017-4792-0

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