| 摘要 |
The short range radio receiver for motor vehicle data signals comprises antenna means (1, 2, 3) having a radiation pattern, connected to a unit (10, 11, 21, 22) for processing received signals, arranged in order to extract the data therefrom, the antenna circuits (1, 2, 3) comprise circuits (3) for rotating the radiation pattern and the processing unit comprises circuits (22) for controlling the rotational drive circuits (3), associated with circuits (21) for measuring the signal level received in at least two positions of the pattern, the measuring circuits (21) driving the control circuits (22) as a function of the measurements.
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