Radiotelephone system for motor vehicles with a group antenna

US6574460B1 · kind B1 · utility

Assignee

• FUBA AUTOMOTIVE GMBH & CO. KG · DE

Inventors

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

Key dates

• Filing date: Apr 12, 2000
• Grant date: Jun 3, 2003
• Expiry date: Apr 12, 2020

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B7/0802
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A radiotelephone system for motor vehicles, having a group antenna system with a plurality of antenna elements, and a mobile radiotelephone with a high-frequency input for receiving radio signals. The group antenna system contains controllable phase and/or amplitude adjusting elements, which are set so that a directed reception with a main receiving direction is available. The controllable phase and/or amplitude adjusting elements are controlled by a processor for tracking the main receiving direction azimuthally in the direction of a fixed station with the help of a tracking signal. Controllable switching-elements for reversing antenna signals for diversity reception are integrated in the signal paths of the group antenna system so that the azimuthal main direction of reception is tracked with a defined tracking by setting a combination of the switching positions of the controllable switching elements. Thus, the antenna reception patterns are changed when the switches of the controllable switching elements are changed, and a changed received signal is available in each case on the high-frequency input of the mobile radiotelephone. When a reception interference is detected, a diver…