A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
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.
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.
PORTABLE COMMUNICATION DEVICE
LI QIYING (author)
2018-03-15
Patent
Electronic Resource
English
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