| 摘要 |
PURPOSE:To accurately deal with a target by transmitting and receiving two radio waves which have a large difference in frequency by one antenna and performing signal processing by using the received signal of one optional frequency. CONSTITUTION:A continuous frequency generated by a voltage-controlled oscillator 1 and a frequency multiplier 3A and a frequency which is generated by a local signal generation part 2 and a frequency multiplier 3B and pulse-modulated 5 are converted 4A into transmission frequencies, which are filtered 6A and 6B to obtain the greatly different transmission frequencies, which are further amplified 7A and 7B. Here, if a target detect its search during the tracking of the target through the operation of only a power amplification part 7A and then jams a signal of the frequency band concentrically, the jammed signal enters a jamming display part 3 and the video of the target being tracked currently can not be decided, so that the tracking becomes impossible. For the purpose, a power amplification part 7B is put in operation simultaneously and a switch 16A is selected; and then the received signal is passed through an antenna 9, a TR part 8, a duplexer 15B, the switch 16A, a mixer 10, a receiver part 11, and a signal processing part 12 and displayed 3, so that the target is dealt with accurately.
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