HOW IS RADIOFREQUENCY ENERGY USED?
Probably the most important use of RF energy is for telecommunications. Radio and TV broadcasting, wireless phones, pagers, cordless phones, police and fire department radios, point-to-point links and satellite communications all rely on RF energy. Other uses of RF energy include microwave ovens, radar, industrial heaters and sealers, and medical treatments. RF energy, especially at microwave frequencies, can heat water. Since most food has a high water content, microwaves can cook food quickly. Radar relies on RF energy to track cars and airplanes as well as for military applications. Industrial heaters and sealers use RF energy to mold plastic materials, glue wood products, seal leather items such as shoes and pocketbooks, and process food. Medical uses of RF energy include pacemaker monitoring and programming.
Probably the most important use for RF energy is in providing telecommunications services. Radio and television broadcasting, cellular telephones, personal communications services (PCS), pagers, cordless telephones, business radio, radio communications for police and fire departments, amateur radio, microwave point-to-point links and satellite communications are just a few of the many telecommunications applications of RF energy. Microwave ovens are an example of a non-communication use of RF energy. Radiofrequency radiation, especially at microwave frequencies, can transfer energy to water molecules. High levels of microwave energy will generate heat in water-rich materials such as most foods. This efficient absorption of microwave energy via water molecules results in rapid heating throughout an object, thus allowing food to be cooked more quickly in a microwave oven than in a conventional oven. Other important non-communication uses of RF energy include radar and industrial heating
Probably the most important use for RF energy is in providing telecommunications services. Radio and television broadcasting, cellular telephones, personal communications services (PCS), pagers, cordless telephones, business radio, radio communications for police and fire departments, amateur radio, microwave point-to-point links and satellite communications are just a few of the many telecommunications applications of RF energy. Microwave ovens are a good example of a non-communication use of RF energy. Radiofrequency radiation, especially at microwave frequencies, can transfer energy to water molecules. High levels of microwaves will generate heat in water-rich materials such as most foods. This efficient absorption of microwave energy via water molecules results in rapid heating throughout an object, thus allowing food to be cooked more quickly in a microwave oven than in a conventional oven. Other important non-communication uses of RF energy are for radar and for industrial heatin
How is radiofrequency radiation measured? What biological effects can be caused by RF energy? What levels of RF energy are considered safe? Why has the FCC adopted guidelines for RF exposure? How can I obtain the Specific Absorption Rate (SAR) value for my wireless phone? Do hands-free kits for wireless phones reduce risks from exposure to RF emissions? Do wireless phone accessories that claim to shield the head from RF radiation work? What are wireless telephone base stations? Are wireless telephone base stations safe? Who regulates exposure to radiation from microwave ovens, television sets and computer monitors? Does the FCC routinely monitor radiofrequency radiation from antennas? Does the FCC maintain a database that includes information on the location and technical parameters of all the transmitting towers it regulates? Can local and state governmental bodies establish limits for RF exposure? Do wireless phones pose a health hazard? What is FDA’s role concerning the safety of wi
Might as well ask how sunlight is used. Audio frequency, or AF, is used to describe frequencies wthin the range of human hearing, essentially 20 – 20,000 hz. Frequencies about 20,000 hz are called radio frequencies, or RF. It applies to bands called VHF and UHF, and applies even to the visible light spectrum and beyond.
