INCOMING DIRECTION ESTIMATION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an incoming direction estimation apparatus in which a miniaturization and a cost reduction are possible, reliability and durability are excellent, and no calibration by no skillful technology, etc. are required. SOLUTION: In the incoming direction estimation apparatus, a joint switching means 20 controls the reactance set of varactor diodes 11-16 by control voltage sets CLV1-CLV6 so that an antenna element 7 and antenna elements 1-6 which element coupling may rotate the ambients of the antenna element 7. An array antenna 10 receives a received signal when the antenna element 7 and the antenna elements 1-6 which perform element coupling rotation ambients of the antenna element 7. A frequency shift detection means 40 detects the frequency shift spectrum of the incoming wave based on the received signal received from the antenna element 7 through a booster 30. A direction estimation means 50 presumes an angle in which the frequency shift spectrum performs a zero cross to be the incoming direction of the incoming wave. COPYRIGHT: (C)2006,JPO&NCIPI