GLASS ANTENNA FOR VEHICLE

摘要

[Object] An obj ect of the present invention is to provide a glass antenna for a side glass which is capable of obtaining a high reception gain over the full range of a desired frequency band of FM broadcast wave. [Means to solve] A glass antenna provided on a vehicle side glass has a power feeding portion disposed at a side portion of the side glass, a main element connected to the power feeding portion and a square bracket-shaped element whose one end is connected to some midpoint of the main element. When a frequency band of the FM broadcast wave received by the glass antenna is divided into two frequency bands with respect to its center frequency, a wavelength of a center frequency of frequency band of a low frequency is », and a wavelength of a center frequency of frequency band of a high frequency. Also a wavelength shortening coefficient of the side glass is ±. In this condition, either one of a length of the main element or a length from the power feeding portion up to an opening end of the square bracket-shaped element is set to ±·»·3/4, and the other is set to ±·»'·3/4.