Study type: Medical/biological study (experimental study)

Behavioral effects of chronic exposure to 0.5 mW/cm2 of 2,450-MHz microwaves. med./bio.

Published in: Bioelectromagnetics 1987; 8 (2): 149-157

Aim of study (acc. to editor)

To study the behavioral effects of chronic exposure to 0.5 mW/cm² of 2450 MHz microwaves. The study reported here was conducted to replicate the microwave effects described in a previous study (publication 2506).



Exposure Parameters
Exposure 1: 2.45 GHz
Modulation type: CW
Exposure duration: repeated daily exposure; 7 h/day for 90 days

General information

rats were assigned randomly into 3 groups: MW exposure group, Sham exposure group and cage-control group.

Exposure 1

Main characteristics
Frequency 2.45 GHz
Exposure duration repeated daily exposure; 7 h/day for 90 days
Modulation type CW
Exposure setup
Exposure source
  • monopole
Distance between exposed object and exposure source 1.05 m
Chamber outside chamber dimensions 3.5 x 3.5 x 2.75 m, covered with absorbers
Setup 14 plexiglas cages (20 x 10 x 9.5 cm) were mounted in a circular array 105 cm from the monopole antenna.
Additional info monopole above ground radiation chamber
Measurand Value Type Method Mass Remarks
power density 5 W/m² mean measured - -
SAR 140 µW/g mean calculated whole body determined by calorimetry

Reference articles

  • Sherry CJ et al. (1995): Lack of behavioral effects in non-human primates after exposure to ultrawideband electromagnetic radiation in the microwave frequency range.

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure
  • after exposure

Main outcome of study (acc. to author)

All groups had similar food intakes and similar body mass. In contrast to the earlier studies (see below) the present experiment provides no indication that microwave irradiated animals were different from sham-exposed controls. Performance of sham- and microwave-exposed animals was reliably different on only one measure, the lever-pressing task. The general conclusion reached was that exposure to CW 2450 MHz microwaves at 0.5 mW/cm² was below the threshold for behavioral effects over a wide range of variables, but it did have an effect on a time-related operant task, although the direction of the effect was unpredictable.

Study character:

Study funded by

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