Pulse radar system

摘要

A pulse radio-localisation system includes a variable-frequency magnetron comprising an input for feeding a frequency-tuning supply voltage. A modulator connected to said magnetron generates magnetron supply-voltage pulses, while a low-power signal source also connected to said magnetron generates a microwave-frequency signal which is fed to the magnetron during the pause between pulses. This signal has frequency which is different from that of the signal generated by the magnetron and which is fixed during each period of the magnetron pulse succession. This system also includes a signal converter that receives a low-power signal reflected by the magnetron. This signal is then converted into a signal which is linked in time to the moment when the frequency of low-power source and that of the magnetron oscillating system correspond to each other, said signal being used for actuating the modulator connected to said converter. In another embodiment, the pulse radio-localisation system comprises a receiver which is connected to a receiving antenna as well as to the above-mentioned low-power signal source for generating a microwave-frequency signal. <IMAGE>