Adaptive phased array antenna using weight memory unit
First Claim
1. 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; and
a 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.
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Accused Products
Abstract
Transmit adaptive phased array antenna system and receive adaptive phased array antenna system are disclosed which include a transmitter unit; a power divider unit which is connected to the transmitter unit, and when transmitting, divides computed weights; a receiver unit; an array antenna unit wherein multiple basic elements of antenna are spatially arrayed; a power feeder unit which, at the time of receiving, receives receive signal of the array antenna unit and changes amplitude and phase of the receive signal according to another control signal, and at the time of transmitting, receives divided signal from the power divider unit; a power combiner unit which sums receive signals, which are received from the power feeder unit, by using weights; an amplitude detector unit which checks the amplitude of the signals which are received from the power combiner unit, and transmits them to the receiver unit; a beam control unit which receives a portion of the amplitude of summed signals from the amplitude detector, and adjusts beam direction of the antenna, and compares field intensity which is received from each direction, and finds optimized path; and a weight memory unit which is commanded by the beam controller unit to provide power feeder unit with weights which befit their directions.
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Citations
13 Claims
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1. A transmit and receive adaptive phased array antenna system using a weight memory unit, comprising:
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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; and a 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for a receive adaptive phased array antenna system, comprising:
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an array antenna unit wherein basic antenna elements are spatially arrayed; a power feeder unit which receives receive signals from said array antenna; a power combiner unit which sums signals coming from said power feeder unit and, combines them into one signal; an amplitude detector unit which detects strength of said receive signals; a beam control unit which receives detected amplitudes of signals from said amplitude detector; a 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 control unit to provide said power feeder unit with stored weights among a plurality of pre-computed stored weights which correspond to directions of the beam selected by said beam control unit; and a receiver unit which receives output signals of said power combiner. - View Dependent Claims (11, 12, 13)
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Specification