Limits of Human Exposure to Radiofrequency Electromagnetic Fields in the Frequency Range from 3 kHz to 300 GHz


This document is one of a series of Safety Codes prepared by theRadiation Protection Bureau of Health Canada. These Safety Codes specify the requirements for the safe use of radiation emitting devices.

The aim of this Code is to set out safety requirements for theinstallation and use of radiofrequency (RF) and microwave devices that operate in the frequency range from 3 kHz to 300 GHz. The exposure criteria in this Code are  not intended to apply to the deliberate exposure for treatment purposes of patients by, or under the direction of, practitioners in the healing arts.

The safety procedures and installation guidelines given in thisCode are for instructing and guiding employees of federal government departments and agencies. These guidelines may be adopted by the provinces, industry or other interested parties. The Department of National Defence shall conform to the requirements of this Safety Code, except in such cases where it considers such compliance would have a detrimental effect on its activities in support of training and operations of the Canadian Forces.

The objective of this Code is to establish guidelines for limitingRF and microwave exposure. As such, the document does not describe techniques for product performance evaluation. However, some basic principles and methods for evaluation of exposure levels are included in order to assist readers who are not familiar with RF measurements and evaluation. The Bureau recommends that organizations which adopt this Code develop their own procedures for compliance and exposure evaluation.

In a field where technology is advancing rapidly and whereunexpected and unique problems may occur, this Code cannot cover all possible situations and blind adherence to rules cannot substitute for the exercise of sound judgement. Consequently, specifications and recommendations in this Code may require some modifications under certain circumstances. This, however, should be done in consultation with experts competent in the field of RF radiation protection. This Code will be reviewed and revised periodically and a particular requirement may be reconsidered at any time if it is found necessary. Interpretation or elaboration on any point can be obtained from the Non-Ionizing Radiation Section of the Radiation Protection Bureau(RPB) in Ottawa