| 摘要 |
<p>PURPOSE:To obtain a multi-static radar device which is capable of maintaining the improvement effect of the signal/noise power ratio by the coherent integration without being affected by the frequency fluctuation of a local oscillator and a coherent oscilla tor of a transmitting station and a receiving station. CONSTITUTION:A first receiving means 8-1 and a second receiving means 8-2 which make common use of a local oscillator 14 and a coherent oscillator 15 are provided. The first receiving means 8-1 outputs the signal by realizing frequency conversion and phase detection of the direct wave 21 from the transmitting station under the output of the respective oscillators, while the second receiving means 8-2 outputs the target signal by realizing frequency conversion and phase detection of the reflected wave from the target in a similar manner to the direct wave, then, a phase compensating means 9 compensates the phase fluctuation of the target signal outputted by the second receiving means 8-2 by using the signal of the first receiving means 8-1. Even if the oscillating frequencies of the transmitting station and the receiving station are fluctuated, the frequency of the target signal is not affected thereby, and the accuracy of the same degree is obtained with an inexpensive crystal oscillator as the case where a higher stable oscillator is used, leading to inexpensive manufacture of the device.</p> |
