LF/RF를 이용한 승용 차량용 양방향 스마트 키 시스템 개발

RF/LF bi-directional communication system is applied to open/lock door system and to transfer vehicle status to FOB key with the security certificate of vehicle. 433MHz/(125/134.2)kHz is used for RF and LF communication frequency, respectively. To enhance the performance of RF/LF system, the optimal position of receiver is selected and 3D intensity map of radio frequency in vehicle is constructed.