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Two-Dimensional Subwavelength-Focused Imaging Using a Near-Field End-Fire Antenna-Array Probe

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2 Author(s)
Markley, L. ; Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada ; Eleftheriades, G.V.

A two-dimensional imaging technique is proposed based on an array of monopole antennas that produces a near-field subwavelength focal spot. The antennas are designed to produce an end-fire, rather than broadside, near-field beam in order to increase the degree of rotational symmetry in the structure. Since two-dimensional focusing does not automatically translate to two-dimensional imaging, symmetry was the key to extending subwavelength imaging to two dimensions. Simulations were conducted to demonstrate the improved resolution of the antenna array probe with a final minimum resolvable spacing of lambda at a distance of lambda/4.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:8 )

Date of Publication:

2009

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