Accession Number : ADD014032

Title :   Near-Field Radio Wave Dosimetry.

Descriptive Note : Patent, Filed 1 Aug 88, patented 21 Mar 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Olsen, Richard G

Report Date : 21 Mar 1989

Pagination or Media Count : 5

Abstract : Method and apparatus for use in measuring SAR (Specific Absorption Rate) of persons subject to RF (radio frequency) radiation utilizes twin well calorimetry including first and second gradient-layer type calorimetry boxes the thermally conductive walls and cover of which contain a multiplicity of thermocouples the outputs of which are differentially amplified to provide a differential output. Identical body models that are thermally responsive to RF radiation are contained in the box wells and, after a period of thermal equalization outside the influence of the RF source, one body model is removed from its well and placed in the influence of the radiation in question while the other remains outside the influence. After a predetermined time period the irradiated model is returned to its well and the differential outputs is plotted over a time period. The area under the resultant curve is representative of total absorption from which can readily be calculated SAR. Patents. (rh)

Descriptors :   *ABSORPTION, *CALORIMETRY, *DOSIMETRY, *HUMAN BODY, *PATENTS, *RADIO WAVES, *RADIOFREQUENCY GENERATORS, BOXES, DIFFERENTIAL ANALYZERS, IRRADIATION, MODELS, NEAR FIELD, OUTPUT, RADIATION, RADIOFREQUENCY, RATES, THERMAL CONDUCTIVITY, THERMOCOUPLES, WALLS

Subject Categories : Radiobiology
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE