Patent ID: 7145500
Filing Date: 2006-12-05
Classification: G01S

Abstract:
1. A pulse wave radar device comprising: a transmitting circuit configured to transmit a transmitting pulse wave modulated from a transmitting pulse; a transmitting antenna configured to radiate the transmitting pulse wave from the transmitting circuit; a receiving antenna configured to receive a receiving pulse wave reflected from an object; a receiving circuit configured to (i) variably gain amplify, and (ii) detect the receiving pulse wave received from the receiving antenna; and a gain control circuit configured to control an amplification degree of the receiving circuit; wherein the gain control circuit periodically controls the amplification degree of the receiving circuit in accordance with the period in which the transmitting circuit transmits the transmitting pulse wave, such that increases the amplification degree of the receiving circuit upward after the transmitting circuit transmits the transmitting pulse wave, and reduces the amplification degree of the receiving circuit downward for a predetermined length of time before the transmitting circuit transmits the transmitting pulse wave.