| 摘要 |
PURPOSE:To reduce the manufacture man-hours and to decrease the production cost while keeping the electric performance by forming an inner wall corner of a hollow part to be a circular-arc shape. CONSTITUTION:Rectangular waveguides 2, 3 have respectively rectangular hollow parts 2a, 3a whose inner wall corner is formed to be circular-arc. Then the rectangular waveguide 2 is arranged so that its rectangular hollow part 2a is tilted by 26.4 deg. with respect to the rectangular waveguide 1 and the rectangular waveguide 3 is arranged so that its rectangular hollow part 3a is tilted by 63.6 deg. with respect to the rectangular waveguide 1. Thus, the rectangular follower parts 2a, 3a are formed by cutting by a milling machine or the like by forming the inner wall corner of the rectangular hollows 2a, 3a to be a proper circular-arc. That is, the discharge processing process is omitted in the manufacture of the rectangular waveguides 2, 3 and the manufacture man- hours are reduced. Furthermore, since the rectangular waveguides 2, 3 are manufactured by the cutting only without use of the electric discharge machining, the production cost is reduced. |
