Radio antenna arrangement located next to vehicle window panels

US5589839A · kind A · utility

Inventors

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

Key dates

• Filing date: Mar 11, 1996
• Grant date: Dec 31, 1996
• Expiry date: Mar 11, 2016

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01Q1/3283
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

The antenna arrangement for a motor vehicle includes an exterior radio antenna (1) for radiating electromagnetic waves in a radio frequency broadcast range; a vehicle window pane (2) closing an opening provided in a metallic vehicle body (3) and a device for shielding the interior from the electromagnetic waves radiated by the exterior radio antenna (1). The device for shielding is a two-dimensional component (4) arranged on the window pane (2) and made of a conductive material substantially optically transparent but substantially opaque to the electromagnetic waves radiated by the exterior radio antenna (1) and a capacitive connection (11,12,13) for the electromagnetic waves in the radio broadcast frequency range between the two-dimensional component (4) and the metallic body (3). The two-dimensional component (4) has a sufficiently low surface resistance in the radio broadcast frequency range and the capacitive connection (11,12,13) has a sufficiently low impedance so that electric and magnetic fields radiated by the exterior radio antenna (1) are effectively prevented from penetrating into the interior of the motor vehicle.