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RADIO TRANSMISSION DEVICE WITH LOW FREQUENCY ANTENNAS FOR A VEHICLE, CAPABLE OF PREVENTING A FOB KEY FROM RECOGNIZING LF SIGNALS OF LOW FREQUENCY ANTENNAS EXCEPT ONE LF ANTENNA FOR COMMUNICATION WITH THE FOB KEY
RADIO TRANSMISSION DEVICE WITH LOW FREQUENCY ANTENNAS FOR A VEHICLE, CAPABLE OF PREVENTING A FOB KEY FROM RECOGNIZING LF SIGNALS OF LOW FREQUENCY ANTENNAS EXCEPT ONE LF ANTENNA FOR COMMUNICATION WITH THE FOB KEY
PURPOSE: A radio transmission device with low frequency antennas for a vehicle is provided to guarantee communication between a fob key and an LF antenna which is the closest to a person who has the fob key by enabling only one LF antenna to communicate with the fob key.;CONSTITUTION: A radio transmission device with low frequency antennas for a vehicle comprises a frequency generator(19), an antenna driving part(21-1~21-N), and a controller(16). The frequency generator creates low frequency carrier signals. According to one or more data signal and ground control signals, the antenna driving part modulates the low frequency carrier signals and drives LF sending antennas. The controller supplies the data signal and the ground control signal to the antenna driving part.;COPYRIGHT KIPO 2010
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