A portable communication device that can suppress degradation in communication efficiency caused by a reduction in device size. The portable communication device includes a mechanical key that is made of an electrical conductor and is for mechanically locking or unlocking a door of a vehicle, and a transmission antenna for transmitting a wireless signal. A storing portion that stores the mechanical key is provided in a case in which the transmission antenna is provided. When the mechanical key is stored in the storing portion, the transmission antenna is electrically connected to the mechanical key. In the portable communication device, the storage state of the mechanical key in the storing portion is detected by a push switch, and impedance correction in a communication circuit is performed by an impedance matching circuit in accordance with the detection result.


    Access

    Download


    Export, share and cite



    Title :

    Portable communication device


    Contributors:
    LI QIYING (author)

    Publication date :

    2018-05-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H04B TRANSMISSION , Übertragung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / E05B LOCKS , Schlösser



    PORTABLE COMMUNICATION DEVICE

    LI QIYING | European Patent Office | 2018

    Free access

    PORTABLE COMMUNICATION DEVICE

    LI QIYING | European Patent Office | 2016

    Free access

    Portable communication device and communication system

    HIRAMINE MASANOBU | European Patent Office | 2019

    Free access

    PORTABLE COMMUNICATION DEVICE AND COMMUNICATION SYSTEM

    HIRAMINE MASANOBU | European Patent Office | 2018

    Free access

    PORTABLE DEVICE AND COMMUNICATION CONTROL METHOD APPLIED TO PORTABLE DEVICE

    SHIBATA TADASHI / HATTORI TAKAYUKI | European Patent Office | 2020

    Free access