KEY DEVICE Russian patent published in 2019 - IPC G08C17/02 H04W8/00 

FIELD: wireless communication equipment.

SUBSTANCE: invention relates to transmission of signals over a wireless communication line. Key device which blocks and unlocks the target by transmitting a signal to the locking and unlocking device comprises a substrate, on which a power supply circuit and a receiving circuit are installed, which receives a request signal transmitted in the first frequency band from the locking and unlocking device through the receiving antenna; as well as a housing configured to accommodate a substrate therein. Among the elements connected to the power supply circuit, the element having the highest height from the substrate surface is installed on the first surface of the substrate. Receiving antenna is installed on the second surface. When the substrate is placed in the housing, the distance from the second surface of the substrate to the inner surface of the housing is less than the distance from the first surface of the substrate to the inner surface of the housing.

EFFECT: technical result consists in reduction of noise effect and increase of communication sensitivity.

10 cl, 10 dwg