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Directional antennas for a roadside beacon system
Directional antennas for a roadside beacon system
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机译:路边信标系统的定向天线
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摘要
A roadside beacon system in which a plurality of roadside antennas transmit data to vehicles passing closely adjacent. The transmitting antennas are mounted high above the sides of the roads and have a gain pattern directed obliquely downward. The mobile antennas on the cars have gain patterns directly upwardly.
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