EMC’04/Sendai CEM CODE VALIDATION USING INFRARED THERMOGRAMS

An infrared (IR) measurement technique is presented that has been developed to measure electromagnetic (EM) fields. This technique uses a minimally perturbing, thin, planar IR detection screen to produce a thermal image (e.g., an IR thermogram) of the intensity of the EM energy over the two-dimensional region of the screen. Several examples are presented using this thermal technique to measured EM fields scattered from conducting bodies, which illustrate the use of this thermal technique to correlate theoretical data with experimental observations. This technique can be used to experimentally validate complicated numerical codes that predict electric field distributions in areas where conventional hard-wired probes would significantly perturb the fields being measured, for example (E-Fields) inside waveguides and cavities and near apertures. Surface current distributions (H-Fields) on metallic surfaces also can be measured with this technique.