Windowpane antenna with transparent conductive layer

US5926141A · kind A · utility

Assignee

• FUBA Automotive GmbH · DE

Inventors

• Heinz Lindenmeier · Planegg, DE
• Jochen Hopf · Haar, DE
• Leopold Reiter · Gilching, DE

Key dates

• Filing date: Aug 12, 1997
• Grant date: Jul 20, 1999
• Expiry date: Aug 12, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2217/78
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An antenna for a windowpane or windshield, comprising a thin, electrically conductive layer flatly applied to an area of the windowpane. The layer is transparent to light and capable of reducing the transmission of heat through the windowpane, and creates a low-conductive area having non-negligible surface resistivity on the windowpane. Also provided is a substantially flat electrode made of highly conductive material, which is high-frequency connected with a reduced high frequency loss connected at at least one edge of said low-conductive layer, and also capacitively connected at high frequencies to an antenna connection point. The electrode is sufficiently long so as to minimize the loss created by the edge of the low-conductive layer. The low-conductive layer can also be sandwiched between glass panels such as in automotive safety glass and an additional electrode can be capacitively coupled to the main electrode. Multiple electrodes can also be disposed on the windowpane for receiving a diversity of frequencies.