High frequency glass antenna for automobiles

摘要

A high frequency and broad band glass antenna for automobiles has a strong directivity in one direction even if the antenna is provided near to the mental portion of a body. The antenna comprises an antenna line provided near to the metal portion of a body, one end of the antenna line neighboring the metal portion being fed; and a parasitic line positioned near to the antenna line for adjusting a directivity and a frequency characteristic of reception sensitivity of the glass antenna. The antenna line consists of a straight antenna line has the length (lambda/4)kappa. The parasitic line extends in parallel with the antenna line and consists of at least one straight conductor line having the length of (lambda/8)kappa. The length that the conductor line overlaps with the antenna line is (lambda/8)kappa. The distance between the conductor line and the antenna line is (lambda/64)kappa.