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Development of an RF near-field exposure synthesizer (10 to 40 MHz).

Authors
Greene-FM
Source
NIOSH 1976 Jan; :1-44
Link
NIOSHTIC No.
00197232
Abstract
Since field strength levels in the Industrial Scientific Medical bands have not been regulated by the Federal Communication Commission, it was possible that workers operating industrial radiofrequency (RF) sources could receive a greater radiation level than those workers operating communications transmitters and other RF sources at regulated frequencies. Due to the close proximity of the workers to industrial RF power sources, high personnel exposures have been noted to occur under near field conditions. The RF synthesizer described in this report was able to simulate near field exposure conditions commonly encountered in the work environment. The report covered the design, fabrication, and testing of the complete facility. The synthesizer consisted of a balanced, parallel plate strip line to generate the desired electric field, and a single turn quadruple feed inductor placed parallel to and midway between the plates to generate the desired magnetic field. The result was a synthesizer in which the electric field and magnetic field components were able to be adjusted essentially independently over a wide range of magnitudes, phase differences, and relative spatial orientations to simulate various near field configurations.
Keywords
Radiation-hazards; Electromagnetic-radiation; Radiation-exposure; Laboratory-workers; Laboratory-equipment; Equipment-design; Analytical-instruments
Publication Date
19760101
Document Type
Numbered Publication
Funding Type
Interagency Agreement
Fiscal Year
1976
NTIS Accession No.
PB-266442
NTIS Price
A04
Identifying No.
(NIOSH) 76-160; Interagency-Agreement-IA-75-16
NIOSH Division
DBBS
Source Name
National Institute for Occupational Safety and Health
State
OH
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