Target e.g. moving target, detecting method, involves calculating corrected amplitude and phase of measurement signals, and phase difference between signals by processing unit based on amplitude and phase of calibrating signal

摘要

The method involves emitting a calibrating signal by a voltage controlled oscillator (10), and receiving an echo of the signal by an antenna (23). Amplitude and phase of the signal are calculated by a processing unit (40). Measurement signals are emitted according to emission frequencies. Corrected amplitude and phase of the measurement signals, and phase difference between the measured signals are calculated by the unit based on the amplitude and the phase of the calibrated signal. Distance of a target is determined from the corrected amplitude, corrected phase and the phase difference. An independent claim is also included for a microwave frequency detector comprising radio frequency signal emission and reception units.