To provide an on-vehicle radio receiver having a stable reception performance.
An on-vehicle antenna structure is provided in a printed board for transmitting and receiving a signal by radioing between a radio communication circuit provided in the printed board and an external apparatus, and comprises an electrical supply pattern connected to the radio communication circuit provided in the printed board, a pattern antenna connected to the electrical supply pattern and formed on the printed board, and a metal wire-shaped antenna connected at a connection position of the pattern antenna and the electrical supply pattern. The metal wire-shaped antenna has a shape in which a metal wire is bent and a horizontal part extends between both side vertical parts, an edge of one side vertical part is connected and fixed to a connection point of the pattern antenna and the electrical supply pattern, the horizontal part is wired with a gap relative to the printed board, and an edge of the other side vertical part is fixed to the printed board.
SASAMOTO TORU
SUMITOMO WIRING SYSTEMS
SUMITOMO ELECTRIC INDUSTRIES