Patent ID: 7009552
Filing Date: 2006-03-07
Classification: G01S

Abstract:
1. A radar device comprising: a transmitting antenna for transmitting sine-wave radio wave towards a target, a receiving antenna for receiving radio wave reflected from the target, a first wave-detecting circuit for multiplying radio wave voltage being transmitted from the transmitting antenna by radio wave voltage being received by the receiving antenna, a shifting means for causing ¼ period phase shift in either the radio wave being transmitted or the radio wave being received, a second wave-detecting circuit for multiplying radio wave voltage being transmitted from the transmitting antenna by radio wave voltage shifted by the shifting means from the radio wave being received by the receiving antenna, or multiplying radio wave voltage shifted by the shifting means from the radio wave being transmitted from the transmitting antenna by radio wave voltage being received by the receiving antenna, and a means for calculating reflecting factor of the target on the basis of the sum of the square of the output voltage of the first wave-detecting circuit and the square of the output voltage of the second wave-detecting circuit.