Patent ID: 8907720

Claim:
A capacitive switch, comprising: a first conductive cantilever, a second conductive cantilever, a substrate, and a coplanar waveguide arranged on the substrate, wherein: the coplanar waveguide comprises a first conductor configured to transmit an electrical signal and a second conductor and a third conductor that are arranged as ground wires on two sides of the first conductor; an insulation medium layer is arranged on the first conductor, and a conducting layer is arranged on the insulation medium layer; the first conductive cantilever is connected to the second conductor by using a first fixed end of the first conductive cantilever, and the second conductive cantilever is connected to the third conductor by using a second fixed end of the second conductive cantilever; and when a direct-current signal is not transmitted on the capacitive switch, a first free end of the first conductive cantilever and a second free end of the second conductive cantilever hang over the conducting layer; when the direct-current signal is transmitted on the capacitive switch, the first free end of the first conductive cantilever and the second free end of the second conductive cantilever contact the conducting layer.