Patent ID: 7439905
Filing Date: 2008-10-21
Classification: G01S

Abstract:
1. A radar apparatus comprising: a switch for selecting one of signals received by a plurality of receiving antennas by sequentially switching from one antenna to another; a mixer for producing a beat signal by mixing a portion of a transmitter signal with the received signal selected by said switch; a Fourier transforming device that Fourier transforms the output signal of said mixer; a correction value storing device that stores the Fourier transformed result provided from said Fourier transforming device, only when there is no echo signal from a target, as a correction value for canceling any effect caused when a DC level of said mixer fluctuates due to the switching of said switch; and a correcting device that corrects said Fourier transformed result from said Fourier transforming device by said correction value stored in said correction value storing device.