Embedded Modulating Dipole Scattering for Near-Field Microwave Inspection of Concrete: Preliminary Investigation
Nondestructive evaluation of concrete structures is an important practical issue in the construction industry. Evaluation encompasses many issues including concrete constituent property, compressive strength and chloride contamination determination to name a few. To this end, a combination of modulated scattering technique and near-field microwave nondestructive evaluation technique, is used to determine its potential for evaluating dielectric properties of a hardened mortar specimen. This technique utilizes a small resonant PIN diode-loaded dipole scatterer embedded inside the mortar while using an open-ended rectangular waveguide probe operating at 7 GHz to detect this dipole which is modulated at low frequencies. The results of this preliminary experiment, and its future ramifications for nondestructive concrete inspection structures are provided in this paper.
A. Joisel et al., "Embedded Modulating Dipole Scattering for Near-Field Microwave Inspection of Concrete: Preliminary Investigation," Proceedings of Subsurface Sensors and Applications (1999, Denver, CO), vol. 3752, pp. 208-214, SPIE--The International Society for Optical Engineering, Jul 1999.
The definitive version is available at http://dx.doi.org/10.1117/12.365700
Subsurface Sensors and Applications (1999: Jul. 19-21, Denver, CO)
Electrical and Computer Engineering
Keywords and Phrases
Dielectric Properties; Diodes; Microwaves; Nondestructive Examination; Rectangular Waveguides; Scattering; Diode Loaded Dipole Scatterer; Embedded Modulating Dipole Scattering; Near Field Microwave Inspection; Open Ended Rectangular Waveguide Probe; Mortar
International Standard Serial Number (ISSN)
Article - Conference proceedings
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