ELECTRIC FIELD SHIELDING APPARATUS THAT DOES NOT AFFECT TRANSMISSION EFFICIENCY OF WIRELESSLY COUPLED TRANSMISSION COIL

摘要

Disclosed in the present invention is an electric field shielding apparatus that does not affect the transmission efficiency of a wirelessly coupled transmission coil. The electric field shielding apparatus is composed of two semi-annular metal sheets and is located above a transmission coil, wherein the top of the circular ring composed of the two semi-circular metal sheets is provided with a gap greater than one tenth of the maximum coil diameter, and the bottoms of the two semi-annular metal sheets are connected and are grounded simultaneously. The present invention effectively reduces electric field radiation of a wirelessly coupled transmission circuit, the shielding apparatus has little effect on wireless transmission efficiency and wirelessly coupled resonance, and other circuit components can be placed above the shielding apparatus, so that the circuit area of the transmission coil can be effectively reduced, and the entire apparatus has advantages such as simple design and easy implementation.