IN-VEHICLE ANTENNA ASSEMBLY

摘要

PROBLEM TO BE SOLVED: To provide a low cost in-vehicle antenna assembly to which a cable is easily attached by reducing the number of lines of the cable. SOLUTION: The in-vehicle antenna assembly comprises at least one or more first antennas (2a) capable of receiving first frequency bands, a plurality of second antennas (2b to 2d) capable of receiving second frequency bands and an antenna switching circuit (1) which switches the antennas according to a voltage of a control signal and is provided with a selection means (3) which outputs the control signal which has a voltage equal to or higher than a prescribed threshold when the first frequency band is selected and has a voltage lower than the prescribed threshold when the second frequency band is selected to the antenna switching circuit (1). Then, the antenna switching circuit (1) switches the antenna to the first antenna (2a) when the control signal has a voltage equal to or higher than the prescribed threshold and switches the antenna to one of the plurality of second antennas (2b to 2d) according to the voltage when the control signal has a voltage smaller than the prescribed threshold. COPYRIGHT: (C)2005,JPO&NCIPI