| 摘要 |
PROBLEM TO BE SOLVED: To provide an on-vehicle unit capable of separating each superimposed signal from a signal, where an optical beacon signal, a radio wave beacon signal and a DSRC (Dedicated Short Range Communication) signal are superimposed on a DC power supply signal, without adding many circuit components. SOLUTION: In order to separate a signal superimposed with an optical beacon signal, a radio wave beacon signal, a DSRC signal, and DC power supply signal, at first, signal separation is performed between the radio wave beacon signal and the DSRC signal, as well as, between the optical beacon signal and DC power supply signal, according to the frequency selectivity of an inductor and a capacitor. Next, a device board pattern, by which the radio wave beacon signal and the DSRC signal flow, is branched to the radio wave beacon circuit direction and to the DSRC circuit direction. Standing waves of the DSRC signal are generated on a pattern line heading to the radio wave beacon circuit from the branch point, in order to prevent the DSRC signal from flowing in the radio wave beacon circuit direction, and signals are separated. COPYRIGHT: (C)2009,JPO&INPIT
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