Electrically heatable windscreen antenna, and method for producing same

An electrically heatable antenna pane comprising:

• a transparent pane;
• a heating layer extending over a portion of a pane surface of the transparent pane and serving as a planar antenna for receiving and/or transmitting electromagnetic waves;
• a first busbar and a second busbar connectable to a voltage source, wherein the first busbar and the second busbar are connected with the heating layer;
• a first antenna connection connected with the heating layer, and
• a second antenna connection connected with a section of the heating layer;
• wherein:
• in an operative condition and upon applying a supply voltage by the voltage source, a heating current flows over a heating field formed by the heating layer;
• the section of the heating layer is electrically insulated from the rest of the heating layer by a heating-layer-free separation region, and
• the section of the heating layer is coupled with an adjacent heating layer for a transmission of antenna signals.

A method for producing an electrically heatable antenna pane, comprising the steps of:

• a) depositing one electrical heating layer on a portion of a pane surface of a transparent pane,
• b) insulating a section of the electrical heating layer from direct currents by a heating-layer-free separation region,
• c) connecting a busbar and a second busbar with the heating layer,
• d) connecting a first antenna connection with the heating layer,
• e) coupling a second antenna with the electrical heating layer bordering the section of the electrical heating layer for transmission of antenna signals,
• f) placing a connecting conductor on the pane,
• g) connecting the first antenna with the second antenna, and
• h) applying a supply voltage to the busbars, thereby flowing a heating current over a heating field formed by the heating layer.