ITU-T Recommendations

There are many possible methods of exposure assessment and each of them has its own advantages and disadvantages. Recommendation ITU-T K.91 gives guidance on how to assess and monitor human exposure to radio frequency (RF) electromagnetic fields (EMF) in areas with surrounding radiocommunication installations based on existing exposure and compliance standards in the frequency range of 9 kHz to 300 GHz. This includes procedures of evaluating exposure and how to show compliance with exposure limits with reference to existing standards.

Recommendation ITU-T K.91 is oriented to the examination of the area accessible to people in the real environment of currently operated services with many different sources of RF EMF, but also gives references to standards and Recommendations related to EMF compliance of products.

This Recommendation includes an electronic attachment containing an uncertainty calculator and the Watt Guard modules.

Editorial note – The electronic attachment can be downloaded together with the main edition of this Recommendation.

Amendment 2 adds Appendix X, which includes the concept and method of EMF exposure information platform to enhance general public awareness for EMF exposure status and usage data of EMF related professional.

Amendment 3 revises and improves Appendix IX to include the evaluation of EMF exposure from manhole-type base stations. It also adds a relationship among the evaluation methods and each section of the core text.