PURPOSE: To convert a linearly polarized wave into a right-handed circularly polarized wave and a left-handed circularly polarized wave and to obtain wide band characteristics by setting up a polarizer on a branch point between a rectangular waveguide and a circular waveguide which are coupled with each other and arranging a phase difference plate in the axial direction of the circular waveguide.
CONSTITUTION: One end 22 of the circular waveguide 2 is opened to the inside of the rectangular waveguide 1 and both axes are coupled with each other so as to intersect at right angles. The polarizer 3 is fixed on the branch point between the rectangular waveguide 1 and the circular waveguide 2, i.e. the opposite wall side to the opening part 22 of the circular waveguide 2, so as to turn both inclined surfaces 31, 32 to the opening part 22 in the rectangular waveguide 1. In addition, the phase difference plate 4 is fixed on the inside of the circular waveguide 2 so that its longitudinal direction is turned from the branch point (opening part 22) between the circular waveguide 2 and the rectangular waveguide 1 to the outside (the direction of an opening part 23) along the axis 21 and the plate surface is vertical to the bottom 12. The phase difference plate 4 is set up so that its longer side end 42 is turned to the polarizer 3.
ISHIMARU HAJIME
IIDA AKIHIKO
| JPS547840A | 1979-01-20 |