| 摘要 |
PURPOSE:To eliminate interference waves completely at low cost by providing a weight control circuit individually so that the arrival direction of an interference wave from the output of the weight control circuit and a radiation pattern which is null in the direction is formed. CONSTITUTION:A weight control circuit 24 inputs the output of a synthesizer 3 and those of antenna elements 211-21n to generate weight control signals to be supplied to respective multipliers 221-22n. A weight control curcuit 26, on the other hand, obtains information on a point in the minimum value direction of a radiation pattern found by the circuit 25 and then generates a weight control signal for generating a new radiation pattern which is null in the direction. Then, a switch circuit 27 is changed over to the circuit 26 side periodically or upon occasion. Consequently, the normal adaptive mechanism of the circuit 24 stops and the circuit 26 operates. The weight control signal generated by this circuit 26 is supplied to the multipliers 221-22n to generate the radiation pattern where interference waves are eliminated completely and which is null in a prescribed direction. |
