| 摘要 |
A slot array antenna where slots are arrayed in two directions is provided, which has a configuration capable of suppressing occurrence of side lobes and suppressed in weight. An antenna 10 includes a radiation waveguide part and probes 18. The radiation waveguide part has two sheets of metal plates facing each other and outwardly radiates a radio wave from a plurality of slots 17 formed in one of the metal plates. Each probe 18 is arranged for every slot 17 to extend inward of the radiation waveguide part from the face where the slots 17 are formed, and changes a transmission mode of the radio wave within the radiation waveguide part. The slots 17 are narrow and arranged at fixed intervals in a longitudinal direction of the slots and in a lateral direction of the slots, respectively. The probe 18 is disposed for every slot 17, on either one of sides of the slot 17 in the lateral direction. Between the adjacent slots 17, the probes are disposed on the opposite sides in the lateral direction. |
