Head car reflects second harmonic of signal from rear car to activate warning and/or braking system.
Harmonic radar helps autos avoid collisions
Selektives Radar zur Kollisionsvermeidung bei Kraftfahrzeugen
IEEE Spectrum ; 10 , 5 ; 38-45
1973
8 Seiten, 12 Bilder, 8 Quellen
Article (Journal)
English
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