Patent ID: 6208303
Filing Date: 2001-03-27
Classification: H01Q,H05B

Abstract:
A window glass antenna apparatus for vehicles, comprising:a defogger attached to a window glass of a vehicle, for defogging the window glass, the defogger including a plurality of horizontal wires constituted of a plurality of thin, narrow conductors and arranged parallelly and horizontally at predetermined intervals, and a pair of bus bars for connecting both ends of the plurality of horizontal wires together;a power supply unit configured to supply power to the defogger to heat the defogger;a separating coil configured to separate the power supply and the defogger from each other at high frequencies;a vertical center wire constituted of a thin, narrow conductor and crossing the horizontal wires in a middle portion of the defogger and in a horizontal direction thereof;a pair of short stub conductors constituted of thin, narrow conductors and provided at right and left positions a 1/4 wavelength of a wave applicable to transmission/reception away from the vertical center wire so as to cross the horizontal wires of the defogger; anda pair of grounding capacitors configured to ground the pair of short stub conductors at high frequencies.