| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio-frequency communication device having an inductive antenna (61) in order to communicate with a transponder. <P>SOLUTION: According to the invention, the above antenna is capable of establishing weak coupling with a transmitter which produces a magnetic field which is substantially homogeneous on the scale of the antenna and is also capable of establishing strong inductive coupling with a transponder located in the vicinity of a device, the device including a transponder interrogation circuit having: sampling or processing means (621, 622, 623, 624) of a signal of antenna terminals which are capable of producing a reference signal corresponding to the signal of the antenna terminals; modulation means (625, 626, 627) capable of modulating the reference signal; and application means capable of applying the modulated signal to the antenna terminals. <P>COPYRIGHT: (C)2010,JPO&INPIT |
