KEY-LESS ENTRY SYSTEM FOR VEHICLE, METHOD OF ADDITIONALLY INSTALLING TRANSMISSION ANTENNA THEREOF, AND EXTENSION UNIT OF KEY-LESS ENTRY SYSTEM

摘要

PROBLEM TO BE SOLVED: To additionally install a transmission antenna easily without affecting the operating performance of an existing smart key-less entry system. SOLUTION: A transmission antenna module 110 for base system for transmitting a first detection signal is installed separately from a control unit 5 and an extension unit 150 transmitting a second detection signal from the transmission antenna 6 forming a transmission area different from the transmission area of the transmission antenna 3 according to the transmission of the first detection signal are additionally installed through a connector. The extension unit 150 allows a signal detection coil for detecting the transmission of the first detection signal to be electrically connected, at non-contact, to a signal line from the control unit 5 to the transmission antenna 3.