| 摘要 |
PURPOSE:To cancel an unreversible phase component due to magnetic strain by providing the 1st circularly-polarized-wave generator, a Faraday rotator, a 180 deg. plate of a ferrimagnetic material having recessed part at corners, the 2nd Faraday rotator, and a circularly-polarized-wave generator in the propagation direction of a radio wave. CONSTITUTION:A 180 deg. plate 9 is formed by providing recessed parts 11 in a prescribed shape at the corner parts parallel to the radio-wave propagation direction of a columnar ferrimagnetic material 1 having a square bottom surface, and then covering the recessed parts 11 and side surfaces with metal. Faraday rotator 8 and 10 to be arranged at both ends of the plate 9 are each constituted by arranging yokes 3 on the side surfaces of a ferrimagnetic material 1 coated with metal, and then winding the magnetic material 1 or yokes 3 with a conductor 2 for magnetization in the opposite directions between the rotator 8 and 10. At both the ends on the side surfaces of the magnetic material 1, circularly-polarized-wave generators 6 and 7 are arranged so that the N and S poles of permanent magnet plates 5 are opposed and in prescribed directions. Thus, the generator 6, rotator 8, 180 deg. plate 9, rotator 10, and generator 7 are arranged in order to cancel an unreversible phase component due to magnetic strain. |
