Measurement of RF power-absorption in biological specimens (10 to 100 MHz).
Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHEW (NIOSH) Publication No. 77-146, 1977 Feb; :1-29
A method is decribed for accurately determining the radio frequency (rf) power being absorbed by a biological specimen during nonionizing radiation exposure testing using the National Bureau of Standards RF Near-Field Synthesizer in the frequency range 10 to 100 megahertz. This method is based solely on measuring the forward and reflected power on the transmission line feeding the synthesizer. Commercially available rf wattmeters can be used, and an automatic data-acquisition system employed, if desired, to "read" the meters and rapidly calculate, display, and record the rf power flow. The method has the advantage that the exact measuring point on the feed line is not critical, as it is with methods employing direct impendance measurements, and that the required measurements can be made without interfering with the exposure tests.
Analytical-methods; Radiation-measurement; Electromagentic-radiation; Radiation-measurement-instrumentation; Electromagnetic-fields; Testing; Bioassaying; Biological-systems
NTIS Accession No.
DHEW (NIOSH) Publication No. 77-146; Interagency-Agreement-Number-75-16
National Institute for Occupational Safety and Health