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:
Sep. 25, 2001
Filed:
Aug. 09, 2000
Thomas Wixforth, Hildesheim, DE;
Mark Wiegmann, Paderborn, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method of calibrating a group antenna with minimal effort includes sending a respective calibrating signal over corresponding transmitting branches (TX,, TX,, . . . , TXm) one after the other; detecting superimposed signal components coupled into respective individual antenna elements (A,, A,, . . . , Am) of the group antenna for each calibrating signal sent over the transmitting branches in the receiving branches (RX,, RX,, . . . , RXm) belonging to the respective individual antenna elements; deriving amplitude and phase variations of transmission functions of all transmitting branches (TX,, TX,, . . . , TXm) or receiving branches (RX,, RX,, . . . , RXm) relative to a transmission function of a reference transmitting or receiving branch from received signals including the superimposed signal components detected in the corresponding receiving branches (RX,, RX,, . . . , RXm) for all calibrating signals; and adjusting amplitude adjusting elements (ATX,, ATX,, . . . , ATXm) and phase adjusting elements (PTX,, PTX,, . . . , PTXm) in the respective individual transmitting branches (TX,, TX,, . . . , TXm) or in the receiving branches (RX,, RX,, . . . , RXm) so that the amplitude and phase variations derived in step c) are minimized.