Patent ID: 7719462
Filing Date: 2010-05-18
Classification: G01F,G01S

Abstract:
1. A time-of-flight calibration system for calibrating a radar measurement device based on an echo signal response comprising: a radar measurement device configured to transmit a radar signal towards a target system spaced apart from the radar measurement device, wherein the target system comprises: a target antenna electromagnetically coupled to receive over-the-air the radar signal from the radar measurement device; a waveguide connected at a first end to the target antenna; and a wave-reflecting impedance connected at a second end of the waveguide, wherein the wave-reflecting impedance is arranged to reflect the radar signal received from the radar measurement device to form a reflected signal, wherein the target antenna transmits back to the radar measurement device the reflected signal formed by the wave-reflecting impedance, wherein a signal transmitted back to the radar measurement device by the target antenna contains the echo signal response from the target system, wherein a location of the wave-reflecting impedance corresponds to a target distance from the radar measurement device being calibrated based on the echo response from the target system.