Electrically heatable windscreen antenna, and method for producing same
First Claim
Patent Images
1. An electrically heatable antenna pane, comprisinga 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 that is electrically conductingly connected with the heating layer;
a second antenna connection electrically conductingly connected with a section of the heating layer in direct contact; and
the second antenna connection being galvanically and physically isolated from a portion of the heating layer outside and adjacent to the section,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,wherein the section of the heating layer is electrically insulated from the rest of the heating layer by a heating-layer-free separation region, andwherein the section of the heating layer is capacitively coupled with an adjacent heating layer for a transmission of antenna signals.
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Abstract
An electrically heatable antenna pane includes a transparent pane and an electrical heating layer extending over a portion of a pane surface. The pane serves at least section-wise as a planar antenna for receiving and/or transmitting electromagnetic waves. A first busbar and a second busbar electrically connectable to a voltage source and electrically conductingly connected to the heating layer are also described.
44 Citations
25 Claims
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1. 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 that is electrically conductingly connected with the heating layer; a second antenna connection electrically conductingly connected with a section of the heating layer in direct contact; and the second antenna connection being galvanically and physically isolated from a portion of the heating layer outside and adjacent to the section, 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, wherein the section of the heating layer is electrically insulated from the rest of the heating layer by a heating-layer-free separation region, and wherein the section of the heating layer is capacitively coupled with an adjacent heating layer for a transmission of antenna signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for producing an electrically heatable antenna pane, comprising:
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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 first busbar and a second busbar with the heating layer; d) connecting electrically conductingly a first antenna connection with the heating layer in direct contact; e) connecting electrically conductingly a second antenna connection with the electrical heating layer within the section and in direct contact, thereby isolating galvanically and physically the second antenna connection from a portion of the electrical heating layer outside and adjacent to the section, and thereby coupling capacitively the second antenna connection with the portion of the electrical heating layer outside and adjacent to the section 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. - View Dependent Claims (23, 24, 25)
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Specification