Title:

A Novel Approach to Assessing Total Electromagnetic Field Exposure From Radiation Sources

Most countries set certain regulations on the amount of electromagnetic radiation exposure allowed for different radio frequency sources. In the USA, exposure limits are regulated by comparing maximum time-averaged power or effective radiated power, whichever is greater, to threshold limits. If a radio frequency source exceeds the thresholds, specific absorption rate SAR limits are used to see the effect of exposure on heating body tissues. Similar processes are used in evaluating multiple radio frequency sources. The multiple sources are evaluated over the same time averaging period. This project investigates radiation exposure from a different standpoint by simulating an environment rich in electromagnetic field signals, e.g., Wi-Fi, LTE, and Bluetooth. Although the power densities of multiple sources occupying different bands are not added in evaluating exposure limits, the project considers the high amplitude pulses generated by adding the sources in the time domain over short time averaging periods. The motivation behind this is the increasing body of evidence showing concerns about these pulses for full-time exposure of high-speed data transmission. The simulation results showed that the instantaneous power densities can be greatly higher than time-averaged power densities while still being in compliance with electromagnetic radiation guidelines.

Name

Comment*

Comments are viewable only by submitter

Captcha*