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Robust flat waves with a uniform feed using a randomized local search
Author(s) -
Keller Brian,
Lopes Leo
Publication year - 2007
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.667
Subject(s) - common emitter , ripple , amplitude , radar , computer science , phase (matter) , algorithm , mathematics , acoustics , optics , electronic engineering , physics , telecommunications , engineering , electrical engineering , voltage , quantum mechanics
Placement of radar emitters in non‐uniformly spaced radar arrays typically involves optimizing the placement of a fixed number of emitter elements across the array. This paper explores optimizing for a flat wave under uniform feed where the number of emitter elements is not fixed. A randomized local search algorithm is used to generate an emitter design, and a greedy search is used to find the optimal solution in that neighborhood. This technique results in a near‐field wave with less than 1 dB of amplitude ripple and less than 8 degrees of phase ripple across a width of 50λ. The designs chosen are robust in the sense that solutions with neighboring pixels on are also of high quality. Furthermore, the proposed algorithm can also find array designs that generate flat waves that are not parallel to the emitter array. Copyright © 2007 John Wiley & Sons, Ltd.