Patent ID: 7642962

Claim:
A method of controlling directivity of an adaptive array antenna which comprises a plurality of antenna elements and is designed to control the directivity dynamically by modifying phase and amplitude of a signal in each antenna element by phase-amplitude change modules and combining modified signals from the antenna elements, said phase-amplitude change modules being connected to the respective antenna elements, said method comprising: determining a signal-accepting sequence of the phase-amplitude change modules wherein only one of the phase-amplitude change modules in each preamble cycle of a received signal is programmed to accept a signal, and all of the phase-amplitude change modules, one-by-one in the sequence, each using a different preamble cycle of a received signal, are programmed to accept signals; receiving signals by the antenna elements; accepting the signals by the phase-amplitude change modules one-by-one in the sequence each using a different preamble cycle of a received signal; accepting output signals from the phase-amplitude change modules by a phase-shift amplitude control module as the output signals are outputted in the sequence from the phase-amplitude change modules and recording the accepted output signals in input storage modules provided for the antenna elements, respectively, wherein the signals received by all the antenna elements are recorded by utilizing different preamble cycles for the respective antenna elements; and performing calculations for dynamically controlling the directivity by utilizing the recorded signals.