Method for adjusting phase in contactless communication

    公开(公告)号:US11126805B2

    公开(公告)日:2021-09-21

    申请号:US16374837

    申请日:2019-04-04

    Abstract: An object is capable of contactless communication with a reader by active charge modulation. The object includes an antenna, an impedance matching circuit, a memory, and a controller connected to the antenna through the impedance matching circuit. The antenna, the an impedance matching circuit and the controller together form a resonant circuit having a resonant frequency. The controller is configured to cause the object to transmit, in the absence of a signal received from a reader, a signal at the resonant frequency, to determine a characteristic obtained from the signal uniquely transmitted by the object, and to perform an adjustment of a phase shift within the object based on the characteristic and an indication stored in the memory, the indication linking values of phase shifts with values of the characteristic.

    METHOD FOR ADJUSTING PHASE IN CONTACTLESS COMMUNICATION

    公开(公告)号:US20190325177A1

    公开(公告)日:2019-10-24

    申请号:US16374837

    申请日:2019-04-04

    Abstract: An object is capable of contactless communication with a reader by active charge modulation. The object includes an antenna, an impedance matching circuit, a memory, and a controller connected to the antenna through the impedance matching circuit. The antenna, the an impedance matching circuit and the controller together form a resonant circuit having a resonant frequency. The controller is configured to cause the object to transmit, in the absence of a signal received from a reader, a signal at the resonant frequency, to determine a characteristic obtained from the signal uniquely transmitted by the object, and to perform an adjustment of a phase shift within the object based on the characteristic and an indication stored in the memory, the indication linking values of phase shifts with values of the characteristic.

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