To solve the problem that a ceptum type wave polarizer that uses the properties of polarization that a ceptum which is a flat plate arranged in a waveguide is incapable of transmitting radio waves, when arranged in parallel to polarized waves and capable of passing the radio waves, when arranged orthogonally to the polarized wave can be made small-sized, but is disadvantageous in electric power resistance, since electric field is concentrated on the tip of the ceptum similar to a turn-style type.
The wave polarizer as an embodiment of the present invention is equipped with a rectangular waveguide, a rectangular branch waveguide which branches off at right angles to an facing flank of the rectangular waveguide, and two ceptums which are provided in a space where the rectangular waveguide and rectangular branch waveguide cross each other and provided at right angles to the flank of the rectangular waveguide; and the interval between the ceptums is set to 0.18λ to 0.27λ, where λ is the wavelength of an electromagnetic wave passing through the rectangular waveguide, and the ceptums are arranged at positions of d/2 from the center axis of the rectangular waveguide.
OMINE HIROYUKI
YABUSHITA TAKESHI
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka