A function varying a wavelength in a waveguide including a ridge-shaped conductor and columnar conductors in a parallel flat structure is added to reduce a size of a phase shifter in which input and output ports are fixed. Thus, a phased array antenna including a plurality of phase shifters is reduced in size. A plurality of convex shapes or concave shapes are provided on a conductor plate on a side not including a ridge-shaped conductor and columnar conductors. A mechanism that moves the conductor plate in a direction crossing a direction in which the ridge-shaped conductor extends is applied. After the convex shapes or the concave shapes are changed by a fixed number between phase shifters adjacent to each other, conductor plates are respectively configured by single members. A mechanism that relatively moves the conductor plates in the direction crossing the direction in which the ridge-shaped conductor extends of the phase shifter is applied.
1. A waveguide, comprising:
a first conductor plate and a second conductor plate which are opposed to each other; wherein
the first conductor plate includes a ridge-shaped conductor and a plurality of columnar conductors in regions on both sides of the ridge-shaped conductor;
the second conductor plate includes a plurality of convexities or a plurality of concavities at least on a portion of a surface of the second conductor plate; and
the second conductor plate is structured to move with respect to the first conductor plate in a direction crossing a length direction of the ridge-shaped conductor.
2. The waveguide according to claim 1 , wherein at least one of the first conductor plate, the second conductor plate, and the ridge-shaped conductor includes an insulator including a surface covered with a conductor film.
3. The waveguide according to claim 1 , wherein
a longest side of the ridge-shaped conductor extends farthest in the length direction.
4. A waveguide, comprising:
a first conductor plate and a second conductor plate which are parallel or substantially parallel to each other; wherein
the first conductor plate includes a first ridge-shaped conductor and a second ridge-shaped conductor, and a plurality of columnar conductors in regions on opposing sides of the first ridge-shaped conductor and the second ridge-shaped conductor;
the first ridge-shaped conductor and the second ridge-shaped conductor are parallel or substantially parallel to each other;
the second conductor plate includes a plurality of convexities or a plurality of concavities at least on a portion of the surface opposed to the first ridge-shaped conductor and the second ridge-shaped conductor; and
the first conductor plate is structured to move relative to the second conductor plate in a direction which crosses a length direction of the first ridge-shaped conductor and the second ridge-shaped conductor.
5. The waveguide according to claim 4 , wherein at least one of the first conductor plate, the second conductor plate, and the ridge-shaped conductor includes an insulator including a surface covered with a conductor film.
6. The waveguide according to claim 4 , wherein
a longest side of the first ridge-shaped conductor and a longest side of the second ridge-shaped conductor both extend farthest in the length direction.