| 主权项 |
1. A waveguide structure, comprising:
a first waveguide configured to internally transmit a high frequency signal in TE10 mode along a first direction; a mode conversion portion configured to electromagnetically couple with the first waveguide, to convert the high frequency signal from TE10 mode to TM11 mode, and to transmit the high frequency signal converted in a second direction perpendicular to the first direction; and a second waveguide configured to electromagnetically couple with the mode conversion portion, and to internally transmit the high frequency signal in the TE10 mode along a third direction perpendicular to the second direction, wherein the first waveguide comprises a first slot at an end thereof facing the second waveguide, the first slot having a square shape with a substantially same width as a width of the first waveguide, the second waveguide comprises a second slot at an end thereof facing the first waveguide so as to be opposed to the first slot, the second slot having a square shape with a substantially same width as a width of the second waveguide, the mode conversion portion is configured to further convert the high frequency signal from the TM11 mode to the TE10 mode, and to transmit the high frequency signal in the TE10 mode to the second waveguide, and a sum of a thickness of the mode conversion portion in the second direction, a length of the first waveguide in the second direction and a length of the second waveguide in the second direction is set to be greater than or equal to one-half of an in-waveguide wavelength of the high frequency signal. |
