Study type: Medical/biological study (experimental study)

Evaluation of the biological effects of police radar RAMER 7F med./bio.

Published in: Environ Health Perspect 1993; 101 (2): 134-136

Aim of study (acc. to author)

To verify whether the frequency at millimeter range emitted by the new police radar device RAMER 7F (manufactured in the Czech Republic) causes harmful biological effects.



Exposure Parameters
Exposure 1: 34 GHz
Modulation type: CW
Exposure duration: 17 h/day, 5 days/week, for 2 weeks

General information

24 animals divided into groups of 10-12 animals, were irradiated where as 40 served control.

Exposure 1

Main characteristics
Frequency 34 GHz
Exposure duration 17 h/day, 5 days/week, for 2 weeks
Modulation type CW
Exposure setup
Exposure source
  • Police radar device RAMER 7F with a funnel antenna 56 mm x 68 mm.
Setup Hairless mice placed in a perspex cage at a distance of 100 cm from the aperture of the antenna.
Measurand Value Type Method Mass Remarks
power density 20 µW/cm² unspecified measured - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

A broad variety of biolocical parameters were investigated. Number and ration of erythrocyte and leucocyte in periperal blood samples; differentiation between lymphocytes and granulocytes. Determination of body weight and organ/bone weight (spleen, thymus, adrenal glands, and femur). Estimation of nucleated cells in organs. Determination of DNA synthesis in cells of the cornea as well as light and electron micoscopic investigation of this tissue.
None of the investigated parameters was significantly affected. Therefore the practical use of this radar device was recommended with cautions about long-term exposure on eyes.

Study character:

Study funded by