SQUARE WAVEGUIDE EXCITER Russian patent published in 2017 - IPC H01Q21/24 

FIELD: radio engineering, communication.

SUBSTANCE: device comprises a tapered waveguide transition from a rectangular cross section to a square cross section whose input is connected to a rectangular waveguide, while the sides of the cross section of the rectangular waveguide are rotated by 45° with respect to the sides of the cross section of the tapered waveguide transition output. A short-circuiter (a short-circuiting wall) and metal plates are inserted in the rectangular waveguide, each of which is installed in the center of the corresponding wide wall of the rectangular waveguide, symmetrically with respect to the longitudinal axis. In the tapered waveguide transition, symmetrically with respect to the longitudinal axis, metal ridges with a varying gap between them are placed. In one of the metal ridges, in the junction plane of the tapered transition and the waveguide with a rectangular cross section, there is a coaxial line whose central conductor is elongated into the gap between the metal ridges and is connected to another ridge, wherein the metal plates and ridges lie in one plane of the longitudinal section of the whole square waveguide exciter.

EFFECT: reduction of overall dimensions of the exciter and suppression of higher wave modes in it.

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