Patent ID: 6396445
Filing Date: 2002-05-28
Classification: H01Q

Abstract:
A window glass antenna apparatus for a vehicle having a window metal frame and a window glass mounted on the window metal frame, comprising:a defogger provided on the window glass and including a heater configured to defog the window glass, the defogger being assembled by a plurality of horizontal wires arranged in parallel with one another, a vertical wire crossing the horizontal wires substantially at a center of the window glass, and two bus bars, one connecting right ends of the horizontal wires and the other connecting left ends of the horizontal wires, the bus bars being arranged at both side ends of the window glass, respectively, with a gap between the window metal frame of the vehicle and the bus bars; a driven antenna provided on the window glass and between a top of the defogger and an upper frame element of the window metal frame and having a bottom element adjacent to the top of the defogger, side elements upwardly extending from both ends of the bottom element, respectively, and upper elements inwardly extending from upper ends of the side elements, respectively, the bottom element of the driven antenna being mutually coupled to the uppermost one of the horizontal wires of the defogger with a coupling index of approximately 1; and a short circuit section configured to cause a short circuit between each of upper ends of the bus bars and the window metal frame at a high frequency.