Patent ID: 7397420
Filing Date: 2008-07-08
Classification: G01S

Abstract:
1. A timing adjustment method of adjusting timing for turning on and off a transmitting amplifier and timing for antenna selection in a 1:N switch, for use in a radar comprising the transmitting amplifier for amplifying a transmit signal, a receiving amplifier for amplifying a received signal, a duplexer connected to an output side of said transmitting amplifier and an input side of said receiving amplifier, a number N of antennas, the 1:N switch, provided between said duplexer and said N antennas, for selecting one of said N antennas and connecting said selected antenna to said duplexer, and a mixer for mixing a portion of said transmit signal with said received signal, said method comprising the steps of: (a) stopping modulation of said transmit signal; (b) setting said receiving amplifier always ON; and (c) adjusting, after said steps (a) and (b), the timing of said antenna selection in said 1:N switch relative to the turning on and off of said transmitting amplifier, based on a voltage level output from said mixer.