High Frequency Radiation and Human Exposure

High Frequency Radiation and Human Exposure,Mahmoud M. Dawoud

High Frequency Radiation and Human Exposure  
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The most important application of RF energy is in providing telecommunication services. These applications include radio and television broadcasting, cellular telephony, personal communication services (PCS), cordless telephones, business radio, radio communications for the police, amateur radio, microwave point-to-point links and satellite communications. Other applications of microwaves utilize its heating properties. Microwave cooking is a good example of a non-communication use of RF energy. This application utilizes the efficient absorption of microwave energy in the water molecules of food which results in rapid heating through out the object material. Other applications include radar, which is used in traffic enforcement, air traffic control and other military applications. Industrial heating and medical applications are examples of other applications. Radio frequency spectrum spans the range of 3 kHz to several hundred GHz. The most utilized range is the microwave range, which can be defined as 1 GHz to @ 40 GHz. Most of modern point to point, wireless, and satellite communications occupy this range. The possible effects on human health of exposure to radio frequency and microwave radiations are of public concern near the locations of radio and television transmitters, mobile base stations, wireless networks and the like. It has been the utmost concern to investigate the non-ionizing radiation levels that result from these sources and their effects on humans. Several studies have been initiated all over the world to determine the safe levels of exposure to RFR (Radio Frequency Radiation) for occupational workers and general public. Several guidelines and standards have been issued by ANSI/IEEE, ICNIRP, NCRP, and other organisations.
Published in 2003.
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