Computer Science
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1540..699n&link_type=abstract
Proc. SPIE Vol. 1540, p. 699-708, Infrared Technology XVII, Bjorn F. Andresen; Marija S. Scholl; Irving J. Spiro; Eds.
Computer Science
1
Scientific paper
An infrared (IR) measurement technique for determining two-dimensional (2-D) and three- dimensional (3-D) microwave field distributions is presented. This IR technique is used to verify predictions made by various numerical electromagnetic (EM) codes. The experimental technique is based on IR thermal measurements of the Joule heating induced in a lossy dielectric or resistive material used as a calibrated IR detection screen when microwave energy is absorbed by the screen. An IR scanning system records the thermal radiation from the screen. The intensity of the microwave field is related to variations in the surface temperature distribution. The detection screen material is of a thin, planar construction and, thus, produces a 2-D map of the microwave field. By moving the screen along the normal to its plane, samples of the 3-D field are obtained. This experimental approach has been applied to several 2-D and 3-D scattering and coupling problems. Comparisons are made between the theoretical and experimental results for various hollow slit cylinder configurations. The advantages, disadvantages and limitations of this IR thermal technique for validation of EM theoretical predictions are discussed.
Cleary John C.
Metzger Don W.
Norgard John D.
Seifert Michael
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