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Nearfield beamforming using radial reciprocity

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3 Author(s)
R. A. Kennedy ; RSISE, Australian Nat. Univ., Canberra, ACT, Australia ; D. B. Ward ; T. D. Abhayapala

We establish the asymptotic equivalence, up to complex conjugation, of two problems: 1) determining the near-field performance of a far-field beam pattern specification and 2) determining the equivalent far-field beam pattern corresponding to a near-field beam pattern specification. Using this reciprocity relationship, we develop a computationally simple procedure to design a beamforming array to achieve a desired near-field beam pattern response. The superiority of this approach to existing methods, both in ease of design implementation and performance obtained, is analyzed and then illustrated by a design example

Published in:

IEEE Transactions on Signal Processing  (Volume:47 ,  Issue: 1 )