Title:
電子通信システム
Document Type and Number:
Japanese Patent JP2006526329
Kind Code:
A
Abstract:
In order that an electronic communications system ( 100 ) equipped with: [a.1] at least one base station ( 10 ), to which [a.2] at least one LC resonant circuit ( 13, 16 ) [a.2.1] with at least one antenna unit ( 16 ) in the form of a coil, and [a.2.2] at least one capacitive unit ( 13 ) series-connected to the antenna unit ( 16 ) is assigned, which base station ( 10 ) is arranged, in particular, on an object to be secured against unauthorized use and/or against unauthorized access, such as on a means of locomotion, on an access system or on an entry system, and [b.1] at least one transponder station ( 40 ), to which [b.2] at least one antenna unit ( 44 ) in the form of a coil is assigned, which transponder station ( 40 ) can be carried by, in particular, an authorized user and/or is designed for the exchanging of data signals ( 22, 24 ) with the base station ( 10 ), wherein the utilization and/or access entitlement is determined and/or the base station ( 10 ) can be controlled accordingly by means of these data signals ( 22, 24 ), may be further developed in such a way that it can be relied upon that a detuning of the resonant frequency of the LC resonant circuit ( 13, 16 ) no longer occurs, it is proposed that the resonant frequency of the LC resonant circuit ( 13, 16 ) is set to a predetermined desired value, and/or calibrated, by means of at least one tuning circuit ( 17, 18 ) connected in parallel with the antenna unit ( 16 ) and/or in parallel with the capacitive unit ( 13 ).
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Inventors:
Bow frank
Nowottnik Jürgen
Nowottnik Jürgen
Application Number:
JP2006506864A
Publication Date:
November 16, 2006
Filing Date:
April 20, 2004
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H04B1/59; B60R25/00; G06K17/00; H04B1/18; H04B5/02
Attorney, Agent or Firm:
Susumu Tsugaru
Akihiko Miyazaki
Fueda Shusen
Akihiko Miyazaki
Fueda Shusen