Electrically heatable windscreen antenna, and method for producing same
An antenna sheet and electric heating technology, applied to antenna equipment with additional functions, ohmic resistance heating, heating element materials, etc., can solve structural limitations and other problems, and achieve the effect of minimizing line loss
Active Publication Date: 2017-02-22
SAINT-GOBAIN GLASS FRANCE
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- Description
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Problems solved by technology
[0011] In the case of electrically heatable antenna sheets, all the above-mentioned improvements in received power and bandwidth must be compatible with the heating function, which often imposes structural constraints
Method used
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Embodiment Construction
[0068] Figure 1A A first embodiment example of an electrically heatable antenna sheet 100 according to the invention is shown. The antenna sheet 100 is here designed, for example, as a transparent sheet 1 of the composite sheet type. The composite sheet 1 is transparent for visible light, for example in the wavelength range from 350 nm to 800 nm, wherein the term "transparency" is to be understood as meaning a transmission of more than 50%, preferably more than 70% and particularly preferably more than 75%. Lightness. The composite pane 1 can be used, for example, as a windshield of a motor vehicle, but the composite pane 1 can also be used therein otherwise.
[0069] Figure 1B according to along Figure 1A The cross-section of the cut line A-A' in FIG. 1 shows a schematic configuration of the composite sheet 1 .
[0070] The composite sheet 1 comprises two transparent individual sheets, namely a rigid outer sheet 2 and a rigid inner sheet 3 , which are fixedly connected ...
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Abstract
The electrically heatable windscreen antenna (100) according to the invention comprises at least the following: a transparent pane (1); an electric heating layer (6) which extends at least over a part of a pane surface (III) and which is used at least partly as a flat antenna for receiving and / or transmitting electromagnetic waves; at least one first busbar (5a) and a second busbar (5b) which can be electrically connected to a voltage source and which are directly contacted with the heating layer (6) in an electrically conductive manner such that a heating current (16) flows over a heating field (17) formed by the heating layer (6) after a feed voltage is applied; a first antenna connection (8) which is directly contacted with the heating layer (6) in an electrically conductive manner; and a second antenna connection (9) which is directly contacted with a portion (11) of the heating layer (6) in an electrically conductive manner. The portion (11) is electrically insulated from the rest of the heating layer (6) against direct currents by a heating layer-free separation region (10), and the portion (11) is coupled to the adjoining heating layer (6) in a capacitive manner in order to transmit antenna signals.
Description
technical field [0001] The present invention is in the field of foil technology and relates to electrically heatable antenna foils as well as a method for the production of said electrically heatable antenna foils and their use. Background technique [0002] Sheets with transparent, electrically conductive coatings have been described several times in the patent literature. Reference should be made by way of example only to the publications DE 198 58 227 C1, DE 10 2008 018 147 A1 and DE 10 2008 029 986 A1. Conductive coatings are used in each case to reflect heat radiation and lead to improved thermal comfort, for example in motor vehicles or in buildings. The coating is also frequently used as a heating layer for the electrical heating of transparent sheets over the entire surface. [0003] Due to their electrical conductivity, conductive coatings can also be used as planar antennas for receiving electromagnetic waves, as in DE 10 106 125 A1, DE 103 19 606 A1, DE 10 2012 ...
Claims
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IPC IPC(8): H05B3/84H01Q1/12H05B3/14H05B3/12
CPCH01Q1/1278H05B3/12H05B3/141H05B3/84H01Q1/02H01Q1/3275H01Q1/44H05B2203/008H05B2203/011H05B2203/013H05B2203/017B32B17/10183B32B17/10348B32B17/10036B32B17/10192
Inventor S.德罗斯特B.施特林G.弗朗索瓦
Owner SAINT-GOBAIN GLASS FRANCE