Patent ID: 6130645
Filing Date: 2000-10-10
Classification: H01Q,H05B

Abstract:
An antenna for transmitting and receiving signals in a windshield of a motor vehicle comprising:at least one heating field located on the windshield and serving as an antenna conductor;at least one electric ground connected to the motor vehicle;at least one HF-connection connected to said at least one heating field for coupling or decoupling high-frequency signals;a plurality of heating connections connected to said at least one heating field for feeding heating power onto said at least one heating field;at least one transformer connected to said heating connections, said at least one transformer each having a primary winding and a secondary winding, wherein each winding is isolated from the other in terms of high-frequency and high resistance; andat least one AC generator connected to said at least one transformer for generating heating power as AC power, wherein power from said at least one AC generator passes through said at least one transformer to said at least one heating field so that the antenna is not loaded with low resistance by the heating connections even at its lowest operating frequencies.