Patent ID: 6049307
Filing Date: 2000-04-11
Classification: H01Q,H04B

Abstract:
A transmit and receive adaptive phased array antenna system using a weight memory unit, comprising:a transmitter unit;a power divider unit which is connected to said transmitter unit, and, when transmitting, divides power equally;a receiver unit;an array antenna unit wherein multiple antenna elements of said antenna system are spatially arrayed;a power feeder unit which, when receiving, receives received signals from said array antenna unit and changes amplitude and phase of the received signals according to pre-computed weights controlled by another control signal, and, when transmitting, receives divided signals from said power divider unit and change amplitude and phase of the received divided signals according to the pre-computed weights controlled by still another control signal;a power combiner unit which sums received signals received from said power feeder unit;an amplitude detector unit which checks the amplitude of the signals which are received from said power combiner unit, and transmits them to said receiver unit;a beam control unit which receives amplitudes of summed signals from said amplitude detector, and adjusts beam direction of the antenna by comparing field intensity which is received from each direction, and finding a path having an optimized intensity; anda weight memory unit in which is stored pre-computed values as weights including phase and amplitude of electrical RF signals supplied to each of the basic antenna elements and which is commanded by said beam controller unit to provide power feeder unit with stored weights among a plurality of pre-computed stored weights which correspond to beam directions selected by said beam control unit.