High-Resolution Microwave Near-Field Surface Imaging Using Resonance Probes

Oleksandr Malyuskin, Vincent Fusco

    Research output: Contribution to journalArticle

    21 Citations (Scopus)
    13 Downloads (Pure)

    Abstract

    A novel microwave high-resolution near-field imaging technique is proposed and experimentally evaluated in reflectometry imaging scenarios involving planar metal-dielectric structures. Two types of resonance near field probes-a small helix antenna and a loaded subwavelength slot aperture are studied in this paper. These probes enable very tight spatial field localization with the full width at half maximum around one tenth of a wavelength, λ, at λ/100-λ/10 standoff distance. Importantly, the proposed probes permit resonance electromagnetic coupling to dielectric or printed conductive patterns, which leads to the possibility of very high raw image resolution with imaged feature-to-background contrast greater than 10-dB amplitude and 50° phase. In addition, high-resolution characterization of target geometries based on the cross correlation image processing technique is proposed and assessed using experimental data. It is shown that printed elements features with subwavelength size ~λ/15 or smaller can be characterized with at least 10-dB resolution contrast.
    Original languageEnglish
    Pages (from-to)189-200
    JournalIEEE Transactions on Instrumentation and Measurement
    Volume65
    Issue number1
    Early online date23 Sep 2015
    DOIs
    Publication statusPublished - Jan 2016

    Keywords

    • Probes
    • Helical antennas
    • Microwave imaging
    • Dielectrics
    • Microwave antennas
    • Spatial resolution

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