| 摘要 |
PROBLEM TO BE SOLVED: To provide a radar system capable of reducing the size of a circuit chip while reducing costs. SOLUTION: The radar system comprises: a first splitter 12 for splitting the output of a VCO (Voltage Controlled Oscillator) 11 at the frequency f-f0 in three; a first switch SW1 for sending to a transmitting antenna TxANT one split part of the signal that is produced by mixing the output of an oscillator at the frequency f0 with a first split output of the first splitter at a first mixer 14 and then split in two at a second splitter; a second mixer 16 for mixing the other split part of the above signal with a signal from a receiving antenna RxANT; a second switch SW2 for controlling whether the signal is passable or impassable that is produced by mixing at a third mixer 18 a second split output of the first splitter which has been delayed at a delay line 17 with a third split output of the first splitter; a synthesis unit 19 for synthesizing the output of the second mixer and the signal from the second switch; a computing part 20 for supplying the VCO with the voltage in which the electric power spectrum of a reference signal of other received samples come within the range of a standard spectrum mask by making a frequency of a reference signal lower than the highest BB frequency and turning off the second switch for received samples in which a frequency of a reference signal is within the range of the BB frequency. COPYRIGHT: (C)2008,JPO&INPIT
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