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:
Jun. 08, 2004
Filed:
Mar. 16, 2001
Juergen Nowottnick, Hamburg, DE;
Frank Boeh, Hamburg, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An arrangement for a passive keyless entry system is disclosed, comprising a base station and a portable data carrier, wherein the data carrier and the base station are configured to determine authorized access of the base station, wherein first and second position information of the relative position of the data carrier with respect to the antenna coils and UHF receiver stages of the base station is gained from measurements of the low-frequency, magnetic alternating fields transmitted by LF transmitter stages of the base station to the data carrier, and the UHF signal transmitted by a UHF transmitter stage of the data carrier to the base station, wherein a signal representing authorized access is generated by the base station when both position information components differ by less than a predetermined extent.