GLASS ANTENNA FOR VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a glass antenna to be installed on a window of a back door or of a non-conductive resin-made hatchback door of a vehicle or the like which can open and close, which can receive FM or TV broadcast waves even if a coaxial cable to be connected to the antenna has to be grounded to the main body of the vehicle away from a feeder point. SOLUTION: The isolated balanced antenna to be installed on a window glass of an openable and closable back door of a vehicle comprises a first element which has at least one horizontal filament and is connected to a first feeder point provided in an upper part or in a lower corner of the window glass, and a second element which has at least one horizontal filament and is connected to a second feeder point installed near the first one. The horizontal filaments extended from near the feeder points of the elements are capacitively coupled. The length of the second element is set toλ/4 (λ: wavelength) or shorter. The first and second elements are connected to inside and outside conductors of an unbalanced coaxial cable, respectively.