The present invention relates to a waveguide T-junction being formed by a main waveguide (10) with a first gate (1) and a second gate (2) and an accessory waveguide with a third gate (20) that is parallel- or series-connected to the main waveguide (10) under an angle of 90 degree. In case of parallel connection of the accessory waveguide (20), the invented waveguide T-junction is symmetrical relative to a vertical plane (Fi1) and relative to a horizontal plane (Fi2), and an induction screen (4) is attached in the main waveguide (10) vertical plane (Fi1) to said main waveguide (10) jacket inner wall. In case of series connection of the accessory waveguide (20), the invented waveguide T-junction is symmetrical relative to a vertical plane (Fi1) and a second vertical plane Fi3 being perpendicular to the first vertical plane (Fi1), and an capacitance screen (4?) is attached in the main waveguide (10) vertical plane (Fi1) to said main waveguide (10) jacket inner wall. A metallic polarization grid (5) extends all over the main waveguide (10) clearance under an angle of 45 degree relative to the main waveguide (10) longitudinal axis at the point of the connection of the accessory waveguide (20) and the main waveguide (10). Said metallic polarization grid (5) is mounted rotatably about axis of rotation (6) being perpendicular to said polarization grid (5) plane. The range of the polarization grid (5) rotation lies at least between a position in which the wires of the metallic polarization grid (5) are oriented horizontally, i.e. perpendicularly to the vector E of the dominant view TEi10 in a waveguide with rectangular cross section, and a position in which the wires of the metallic polarization grid (5) are oriented vertically, i.e. parallel to the vector E of the dominant view TEi10 in a waveguide with rectangular cross section.
展开▼
