| 摘要 |
PURPOSE:To maintain a large ratio of reception level of a subantenna with respect to the reception level in the side lobe region of a main antenna by automatically directing the beam of the subantenna to the incoming direction of a disturbing wave detected with a detector for the bearing thereof. CONSTITUTION:This is composed of main antenna receiving system comprising a main antenna 1 and a receiver 2, a subantenna receiving system comprising a subantenna 14 and a receiver 5, a disturbing wave bearing detector 13, a beam scanner 18, a phase shifter 15 and a direction tracker 17. The subantenna 14 is provided to scan the direction of beam with a phase shifter 15 and the beam is directed to the incoming direction of a disturbing wave with the driving of the phase shifter 15 by the beam scanner 18 detecting the direction thereof with the disturbing wave bearing detector 13. This can keep the gain of the subantenna so high with respect to the side lobe level in the incoming direction of the disturbing wave to improve the effect of suppressing side lobe. |
