| 摘要 |
PURPOSE: A smart key system is provided to release a door lock or a steering lock of a vehicle even if a user doesn't have a vehicle key by arranging a smart key unit in a battery unit. CONSTITUTION: A smart key system comprises a mobile communication terminal with a battery unit(270). The battery unit comprises a smart key unit(210), a High Frequency transmitter(215), and an antenna module(300). The smart key unit generates a wakeup signal based on an LF signal transmitted from a vehicle, and generates an HF signal corresponding to the wakeup signal. The HF transmitter transmits the HF signal. The antenna module transmits and receives the LF signal and has first, second, and third-axis antennas(310,320,330). |
