发明名称 |
FREQUENCY-MODULATED CONTINUOUS-WAVE RADAR FOR DISTANCE MEASUREMENT |
摘要 |
<p>The radar includes a linearly frequency-modulated microwave frequency signal generator (1), a transmitter-receiver antenna (2) and coupling means (3, 6; 48) in order to sample a local oscillation signal and an echo signal and in order to transmit these two signals to the inputs of a mixer (5) which provides at its output a subtractive beat signal between these two signals. The line lengths are adjusted in order to produce a static adjustment of the phase between the local oscillation signal and the interference antenna reflection signal. A phase control loop including an amplifier (36) and a low-pass filter (37) is connected between the output of the mixer and an input of a phase-shifting circuit (35; 54) placed in the local oscillation channel; the closed control loop cut-off frequency is just below the frequency of the subtractive beat signal.</p> |
申请公布号 |
EP0258917(B1) |
申请公布日期 |
1991.10.16 |
申请号 |
EP19870201466 |
申请日期 |
1987.07.31 |
申请人 |
TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES T.R.T.;N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
DEJAEGHER, DANIEL |
分类号 |
G01S7/03;G01S7/35;G01S13/34 |
主分类号 |
G01S7/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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