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高频电磁场与微波统称为射频辐射，是电磁辐射中量子能量最小，波长最长的波，其中波长1m～3000m的电磁波是高频电磁场。在工业生产中金属高频焊接、冶炼等加工设备都会产生高频电磁场，其使用频率一般为300kHz～300MHz。一、感应近区场与辐射近区场的划相对地划分为近区场和远
High-frequency electromagnetic fields and microwaves are collectively referred to as radio frequency radiation. They are the smallest of quantum energy and the longest wavelength of electromagnetic radiation, and the electromagnetic wave with a wavelength of 1m to 3000m is a high-frequency electromagnetic field. In the industrial production of high-frequency metal welding, smelting and other processing equipment will produce high-frequency electromagnetic fields, the use of the frequency is generally 300kHz ~ 300MHz. First, the induction of near-field and near field radiation field plan is relatively divided into near-field and far