Patent ID: 7471240
Filing Date: 2008-12-30
Classification: G01S,H01Q

Abstract:
1. A device for detecting a connection state of an integrated antenna having an antenna for communicating with an outside of a vehicle, and a transmitting/receiving element for optical beacons by detecting a current flowing through the integrated antenna, the device comprising: a resistor means through which the current flows into the integrated antenna by feeding power to the integrated antenna; a voltage outputting means that outputs a voltage corresponding to a drop voltage in the resistor means; an inspection signal outputting means that outputs an inspection signal to the transmitting element; and a connection state detecting means that detects a connection state of the integrated antenna based on a voltage from the voltage outputting means when the inspection signal outputting means is operating, wherein a resistance value of the resistor means is set to a resistance value with which the resistor means can obtain a predetermined drop voltage when current flows through the resistor means as the inspection signal flows through the transmitting element.