RADIO SIGNAL RECEIVER, AND METHOD FOR ADJUSTING DIRECTIVITY

摘要

PROBLEM TO BE SOLVED: To provide a radio signal receiver where the directivity of an antenna can be adjusted electrically after installed to a vehicle body. SOLUTION: The radio signal receiver is provided with: an antenna element 21 which receives a radio signal; a parasitic element 22 which is arranged closely to the above antenna element; and a variable capacitance element 23 interposed between the parasitic element and the ground. COPYRIGHT: (C)2008,JPO&INPIT