The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1998
Filed:
Dec. 11, 1996
Wilhelm Grabow, Nordstemmen, DE;
Felix Dobias, Paderborn-Dahl, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method for effecting a wireless exchange of data between a stationary station and transmitter/receivers on board objects, particularly vehicles moving relative to the stationary station. The reception profiles of an antenna array having a plurality of receiving antennas is directed electronically onto an object. The transmitter/receivers on the object transmit, in response to the received signal, an answer signal having the same carrier frequency as the signal received and having a level which is proportional to the level of the signal received. In the antenna array, a transmitting antenna is associated with each receiving antenna, and the transmitting antenna sends out signals having a transmission profile which corresponds to the reception profile of the receiving antenna. The damping factors of transmission profile and reception profile are thereby multiplied by each so that two relatively simple circuits are necessary in order to achieve a desired high side-lobe damping.