Method of connecting one or more contactless components to a single antenna, and corresponding system

    公开(公告)号:US09729202B2

    公开(公告)日:2017-08-08

    申请号:US15198758

    申请日:2016-06-30

    CPC classification number: H04B5/0031 H03H7/40 H04W76/14

    Abstract: A first component (CMP1) is connected to the antenna (ANT) and to an impedance matching circuit (CAI) configurable on command and connected to the antenna, and in the absence of another component (CMP2) connected to the antenna, the impedance matching circuit is placed in a first configuration in which it forms with the first component and the antenna a resonant circuit having a first resonant frequency compatible with a carrier frequency. In the presence of a second component (CMP2) connected to the antenna, the impedance matching circuit is placed in a second configuration in which it forms with the first component, the second component and the antenna a resonant circuit having a second resonant frequency compatible with the carrier frequency.

    Method and device for transmitting information over a communication channel with variable impedance

    公开(公告)号:US09705533B2

    公开(公告)日:2017-07-11

    申请号:US14961985

    申请日:2015-12-08

    Inventor: Mark Wallis

    CPC classification number: H04B1/0007 H04B3/54 H04B2203/5425 H04L5/001

    Abstract: A method includes digital/analog conversion of a digital signal modulated by information to provide a modulated initial analog signal having a crest factor greater than one, and amplification of the initial analog signal to provide an amplified modulated signal. A modulated channel analog signal derived from the modulated amplified analog signal is transmitted over a communications channel, with impedance of the communications channel varying during the transmission. The method further includes at least one determination during the transmission of a peak-clipping rate of the amplified analog signal over at least one time interval, and an adjustment of a level of the initial analog signal as a function of the determined peak-clipping rate.

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