Near-field measurements of RF fields
Abstract
The majority of electronic products that emit electromagnetic radiation (EM) to which the general public is inadvertently exposed operate at frequencies below 500 MHz. For the purposes of this paper, the radio frequency (RF) portion of the spectrum will be considered to extend from 1 MHz to 500 MHz. Some of the products for which no emission limits exist, or which are limited by the F.C.C. for reduction of their interference potential to communication systems are as follows: Citizen Band Radios; Induction Heaters (Sealers); Electrosurgical Units; Wireless Intercoms; Walkie-Talkies; Wireless Microphones; Security Transmitters; Intrusion Detectors; Field Disturbance Sensors; Door Opener Transmitters; Model Remote Control Transmitters; Amateur Radio Transmitters; Epillators; Electronic Games; Class I TV devices (couple to TV set with modulated RF oscillator); Master Antenna Systems; Ignition Systems; and Light Dimmers. Three of these exemplify the general problem and have been investigated by the Bureau of Radiological Health. These are: Radio Frequency Sealers; Electrosurgical Units, and Citizen Band Radios. A description of each of these, along with the data obtained in the near field are presented.
- Publication:
-
In its Symp. on Biol. Effects and Meas. of Radio Freq./Microwaves p 104-116 (SEE N78-22591 13-51
- Pub Date:
- July 1977
- Bibcode:
- 1977bemr.symp..104R
- Keywords:
-
- Electromagnetic Radiation;
- Near Fields;
- Radio Frequencies;
- Electromagnetic Fields;
- Radiation Hazards;
- Radio Equipment;
- Communications and Radar