NDLI: Concept of Near-Field Millimeter-Wave Imaging System with a Spatial Resolution beyond the Abbe Barrier

Content Provider	IEEE Xplore Digital Library
Author	Minin, I.V. Minin, O.V.
Copyright Year	2008
Description	Author affiliation: Novosibirsk State Tech. Univ., Novosibirsk (Minin, I.V.; Minin, O.V.)
Abstract	A near-field millimeter-wave (mm-wave) imaging system with a spatial resolution of less than 0.5 lambda has been designed in the millimeter wave range for on-line inspection of nonmetallic (dielectric) materials. The imaging system consists of a transceiver block coupled to an antenna that scans the material to be imaged; a reflector plate is placed behind the material. As an antenna a diffractive optics with focus F < lambda is used. Such an antenna allow to focusing of millimeter-wave radiation beyond the Abbe barrier. A quadrature IF mixer in the transceiver block enables measurement of in-phase and quadrature-phase components of reflected signals with respect to the transmitted signal. The initial results show the feasibility of the near-field mm-wave sensor for nondestructive inspection of materials with sub-Rayleigh resolution. Using future optically dense modified Fresnel lenses, a resolution of the order lambda/100 seems to become possible.
Starting Page	509
Ending Page	512
File Size	1986485
Page Count	4
File Format	PDF
ISBN	9781424438211
DOI	10.1109/CJMW.2008.4772481
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-09-10
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Shanghai Univ.
Subject Keyword	Dielectric materials Inspection Optical imaging Reflector antennas Transceivers Signal resolution sub-Rayleigh resolution millimeter wave imaging system nondestructive testing Abbe barrier Focusing Optical materials Fresnel lens Optical sensors Spatial resolution
Content Type	Text
Resource Type	Article

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