| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a millimetric wave radar in which a short distance can be detected with high accuracy while keeping a maximum distance by detecting the distance to an object based on a signal received by an antenna for receiving a reflected wave from the object. SOLUTION: The millimetric wave radar comprises a first millimetric wave oscillator 1, a modulator 2 for pulse modulating an oscillation signal from the first millimetric wave band oscillator 1, an antenna 5 for transmitting the oscillation output from the first millimetric wave band oscillator 1, and an antenna 6 for receiving a reflected wave from an object and detects the distance to the object based on a signal received by the receiving antenna 6. The millimetric wave radar comprises a millimetric wave band oscillator 1, a pulse modulator 2, a circulator 3, a transmission antenna 5, a receiving antenna 6, a mixer 7, a local oscillator 8, an IF amplifier 9, a variable gain amplifier 10, a detector 11, and a base band amplifier 12. Furthermore, a directivity coupler 13 for introducing a part of the transmission signal to the mixer 7 is provide in the vicinity of the transmission antenna 5 and the receiving antenna 6.</p> |
