Waveguide switch

A waveguide switch, comprising:

• a base portion;
• a first fixing waveguide block which is fixed to the base portion and in which a plurality of transmission lines surrounded by metal walls is formed to penetrate to a first end surface;
• a second fixing waveguide block which is fixed to the base portion and has a second end surface parallel to the first end surface of the first fixing waveguide block, and in which a transmission line surrounded by metal walls is formed to penetrate from the second end surface;
• and
• a movable waveguide block which includes a third end surface which is parallel to and faces the first end surface of the first fixing waveguide block at a predetermined interval from the first end surface, a fourth end surface which is parallel to and faces the second end surface of the second fixing waveguide block at a predetermined interval from the second end surface, and a plurality of transmission lines surrounded by metal walls which are formed to penetrate from the third end surface to the fourth end surface, and which is supported by the base portion in a state where the movable waveguide block can slide in parallel to the first end surface of the first fixing waveguide block and the second end surface of the second fixing waveguide block due to a drive device,
• wherein grooves having a depth equivalent to ¼ of a guide wavelength of a leakage prevention object frequency are provided to prevent leakage of electromagnetic waves from a gap between the blocks at a position of a portion which surrounds each of openings of the plurality of transmission lines of the first fixing waveguide block on the first end surface side of the first fixing waveguide block, a position of a portion which surrounds an opening of the waveguide of the second fixing waveguide block on the second end surface side of the second fixing waveguide block, and a position of a portion which surrounds each of openings of the plurality of waveguides of the movable waveguide block on the third end surface side and the fourth end surface side of the movable waveguide block.