PURPOSE: To obtain the title antenna suitable for a broad band reception antenna by providing a main antenna extending from its side to its upper side, up to nearly its full side along the circumferential of a window pane while using one lower side of the window pane as a feeding pint and an impedance adjusting antenna to one side of the window pane of the main antenna.
CONSTITUTION: The main antenna 2 and the impedance adjusting antenna 3 are printed and baked together with the feeding pint 4 on an in-cabin side plate glass 1 by using a conductive paste. In case of receiving a TV broadcast wave or an FM radio broadcast wave, the antenna extending from the lower end of one side till at least the upper side, nearly the full side along the circumference of the window pane acts like the main antenna 2 over the entire frequency. The deterioration in the reception gain due to partial mismatching loss in case of mismatching is reduced by approximating the antenna impedance of the impedance adjustment antenna 3 to the impedance of a feeder (coaxial cable). Thus, the broad band reception is attained.
NISHIKAWA KAZUYA
TSUKADA TOKIO
HIROTSU TORU
Next Patent: ANTENNA SYSTEM IN COMMON USE OF TRANSMISSION AND RECEPTION