Patent ID: 6690952
Filing Date: 2004-02-10
Classification: H01Q,H04B

Abstract:
An adaptive array antenna transceiver apparatus comprising a plurality of antenna elements, transmitters and receivers in the same number as the antenna elements of said array antenna, a common-use device connecting said transmitters and receivers to each of said antenna elements, and a radiation pattern control processor that controls the radiation pattern of said array antenna by synthesizing the output of the plurality of receivers by weighting the amplitude and phase with respect to a signal input from each respective antenna element into said plurality of receivers, and at the same time the reception frequency of said receivers is different from the transmitting frequency of said transmitters, which provides:a local signal generator that outputs a signal having a frequency that corresponds to the difference between the reception frequency of said receivers and the transmitting frequency of said transmitters; a dividing device that separates and extracts a part of the signals from the output of said plurality of transmitters; a first switch that selects the signal output from any one of said plurality of transmitters; a frequency converter that converts the frequency of the signal selected by said first switch by using the signal output by said local signal generator; a second switch that inputs signals output by said frequency converter and selectively outputs them to any one of the plurality of paths corresponding to said plurality of receivers; a third switch that selectively inputs a reception signal from a said antenna elements or a signal from said second switch into each of said receivers; and a calibration control circuit that controls the connection state of said first switch, second switch, and third switch, inputs the amplitude and phase values obtained at said receivers, and finds the calibration value of each of the branches of said array antenna.