Both waveguides (exposure and sham-exposure) of 4 m diameter and 17 cm vertical plate distance were placed within the same room and carried up to 24 cages measuring 425 mm Π265 mm Π160 mm (L ΠW ΠH) each of them housing 6-7 mice. The cage area was covered with trapezoidal lids (3 cages per opening) with wire mesh. At the outer boundaries of the units, absorbers were installed.
Setup
A modulatedsignal generator and an amplifier were connected to the cone antenna of one unit (and also the presence of the field was monitored continuously) via a "black box" so that it could not be seen which group of animals was exposed (blind design).
Additional info
Because the plate distance of the radial waveguide had to be chosen larger than half the wavelength due to the regulated height of the cages, special modifications of the fundamental geometry had to be performed to obtain only the fundamental TEM-mode and avoid the propagation of the unwanted higher order modes.
Bundesamt für Strahlenschutz (BfS; Federal Office for Radiation Protection), Salzgitter, Germany
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