Devices to reduce electro-magnetic field radiation

摘要

Apparatus for reducing electromagnetic field radiation from an electrically conducting enclosure is disclosed. The apparatus comprises an electrically conducting element having two extremities and in which the electromagnetic field radiation induces a current, and an electrical resistance connected between the two extremities of the electrically conducting element so as to absorb the electromagnetic field radiation. In an embodiment to absorb electric field energy, the element is a substantially linear conducting element which absorbs electric field radiation and the electrical resistance has a direct electrical connection to a first extremity of the electrically conducting element. In an embodiment to absorb magnetic field energy, the element is a substantially circular conducting element which absorbs magnetic field radiation, each end of the electrical resistance having a direct connection to a respective extremity of the substantially circular conducting element.