Flat antenna with low overall height

US5850198A · 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: Sep 30, 1996
• Grant date: Dec 15, 1998
• Expiry date: Sep 30, 2016

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01Q13/10
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

The invention relates to an antenna with electrically low overall height, preferably for frequencies in the GHz-range. It consists of a first electrically conductive area (1) which, in the first frequency range, is not larger in any dimension than 3/8 lambda, and a second eletrically conductive area (2) of at least the same size acting as the electrical counterweight, said second area being substantially parallel with the first conductive area (1) and arranged opposite the latter with a certain spacing (A) from the latter, and of a conductive bridge (4) connecting an edge (5) of the first conductive area (1) across a width (B) to the second electrically conductive area (2) in a low-ohmic way in terms of high frequency, whereby the first electrically conductive area (1) is electrically conductively connected in an antenna connection site in a coupling point (3) to the inside conductor of a coaxial line (7) conducting high frequency via a conductor (15), and the dimensions of the antenna and the coupling point (3) are selected in a way such that the antenna is in resonance in the first frequency range. For the formation of resonance, slots (10) having a suitable slot width (9) and sh…