| 摘要 |
PURPOSE:To decrease the length of a main waveguide in the guide axis direction and to simplify the antenna adjusting mechanism by supporting a couple of loop antennas to one end plate of the main waveguide, forming the short-circuit side of each loop and a guide axis parallel part at the opposite side as a Q transformation strip line and making the end plate freely turnable to the main waveguide. CONSTITUTION:A couple of loop antennas 11, 12 are supported at a different position of the end plate 2 of the main waveguide 1 and the specific guide axis parallel parts 11, 12 are connected electrically to the center conductor of the coaxial parts 9, 10 penetrating the end plate 2. The loops 11B, 12B are formed to be in a loop that they are made respectively orthogonal to the end plate 2 in a plane made orthogonally mutually. In supporting a couple of the loop antennas 11, 12 to the one end plate 2, the length of the main waveguide 1 in the guide axis direction is reduced. Further, in turning the end plate 2 supporting both the loop antennas 11, 12 around the guide axis of the main waveguide 1, the direction of both the loop antennas 11, 12 is corrected without turning the main waveguide 1.
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