Patent ID: 9728859
Date: 2017-08-08
CPC Classifications: G01S,H01Q,Y10T

Claim:
1. An antenna, comprising: a radiation waveguide part including two sheets of metal plates facing each other and configured to outwardly radiate a radio wave from a plurality of slots formed in one of the metal plates; and a stub arranged for every slot to extend inward of the radiation waveguide part from a face of the radiation waveguide part where the slots are formed, and configured to change a transmission mode of the radio wave within the radiation waveguide part, wherein the slots are narrow and arranged at fixed intervals in a longitudinal direction of the slots and in a lateral direction of the slots, respectively, and wherein the stub is disposed for every slot, on either one of sides of the slot in the lateral direction, the adjacent stubs in the lateral direction being disposed on the opposite sides.