Patent ID: 8446323
Filing Date: 2013-05-21
Classification: H01Q

Abstract:
1. A radar antenna array for a medium to long range radar sensor, the array comprising a first antenna group having a plurality of individual, mutually coupled antenna elements and a second antenna group having a plurality of individual, mutually coupled antenna elements, the individual antenna elements of different antenna groups being not galvanically connected to one another, but being arranged in a common planar area and in a mutually interlaced manner, wherein a) said first and said second antenna groups are each assigned its own HF receiver module, to which connectors of the respective mutually coupled antenna elements of a particular antenna group are permanently connected, wherein said antenna groups are adapted to be operated simultaneously as receiving antennas, b) whereby the antenna elements of both antenna groups are disposed on a first side of a flat substrate, on a second side of which both of the HF receiver modules are disposed, c) and whereby an intermediate layer, comprising substantially closed, electrically conductive layer, is disposed between the first and the second sides of the flat substrate, d) and whereby the contacting of the individual antenna elements, namely their connection or coupling to a respective connecting line common to each antenna group, takes place on the back of the board and/or within its conductive intermediate layers, e) for which purpose, there is at least one via in the region of each antenna element that leads to a given intermediate layer of the board or all the way to the back thereof.