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HIRF is an acronym for High Intensity Radiated Fields and refers to radio frequency energy of a strength sufficient to adversely affect either a living organism or the performance of a device subjected to it. A microwave oven is an example of this principle put to controlled, safe use. The U.S. Food and Drug Administration (FDA), and U.S. Federal Communications Commission (FCC) set limits for the amounts of Radio Frequency Energy exposure permitted in a standard work-day. Radio-Frequency Energy is non-ionizing electromagnetic radiation, its effects on tissue are through heating. Electronic components are Affected via rectification of the RF and a corresponding shift in the bias points of the components in the field. ==History== The U.S. Federal Aviation Authority (FAA) and industry EMC leaders have periodically met to define the adequacy of protection requirements for civil avionics from outside interference since 1980. In 1986 The FAA Technical Center contracted for a definition of the electromagnetic environment for civil aviation. This study was performed by the Electromagnetic Compatibility Analysis Center (ECAC). The study has shown levels of exposure to this threat as high as 4 orders of magnitude (10000 times) higher than the then current civil aircraft EMC susceptibility test certification standards of 1 volt/meter (DO-160). This environment was also 2 orders of magnitude higher (100 times) than the then prevailing military avionics systems test standards (MIL-STD 461/462). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「HIRF」の詳細全文を読む スポンサード リンク
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