TECHNIQUE FOR CALIBRATING MINIATURE ELECTRIC-FIELD PROBES FOR USE IN MICROWAVE BIOEFFECTS STUDIES AT 2450 MHZ: EVALUATION AND CALIBRATION OF BRH - NARDA PROBES

Authors
  1. Hill, D.A.
  2. Hartsgrove, G.W.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
A set of miniature probes for determining electric fields in tissue was evaluated and calibrated for use in microwave bioeffects studies at 2450 MHz. The calibrations in air and tissue-equivalent liquids were carried out using a new S-band waveguide technique. The air calibration using waveguide has an accuracy of + or - 10% compared to + or - 18% for our anechoic-chamber calibration. The average probe sensitivity in air is 1.0 mV/MWcm(2-) for the five probes calibrated and varies slightly with power density and probe. To estimate probe sensitivity in tissue, a section of waveguide is filled with a tissue-equivalent liquid and is separated from the air-filled waveguide by a very thin (0.25 mm) planar spacer. The probe response is measured as a function of position on either side of the spacer and extrapolated to the interface.
Report Number
TN-80-31 —
Date of publication
15 Oct 1980
Number of Pages
40
DSTKIM No
81-01466
CANDIS No
32471
Format(s):
Hardcopy;Originator's fiche received by DSIS

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