Diversity antenna on a dielectric surface in a motor vehicle body

US6603434B2 · kind B2 · utility

Assignee

• Fura Automotive GmbH & Co. KG · DE

Inventors

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

Key dates

• Filing date: Jan 7, 2002
• Grant date: Aug 5, 2003
• Expiry date: Jan 7, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01Q21/28
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A diversity antenna for the meter and decimeter wave ranges installed on a conductively framed dielectric surface in the body of a motor vehicle and substantially assembled from rectangular part surfaces, for example in a roof cutout or trunk with a dielectric trunk lid. A substantially wire-shaped antenna conductor is installed parallel with the conductive frame and spaced from a part thereof of the dielectric surface less than one fourth of the width of the dielectric surface. The wire-shaped antenna conductor has an interruption site which define a pair of antenna connection terminals. A two-pole, electronically controllable impedance network is incorporated in series in at least one additional interruption site. The position of the interruption site with the pair of antenna connection terminals, and the position of the additional interruption site are selected so that the antenna signals available at the different settings of the controllable impedance network are adequately decoupled in terms of diversity.