BROADBAND HORN-TYPE WAVEGUIDE RADIATOR Russian patent published in 2004 - IPC

FIELD: radio engineering; antenna arrays or mirror antennas, or self-contained antennas.

SUBSTANCE: proposed radiator has waveguide section with two longitudinal metal ridges with variable clearance between their facing edges, waveguide shorting plug mounting coaxial power lead-in, radiator exciter, and wave impedance transformer, all disposed in center of waveguide E-plane; exciter is made in the form of rectilinear cylindrical conductor which is, essentially, extension of mentioned coaxial lead-in central conductor. Exciter is electrically connected to butt-end of one of ridges spaced from bench-shaped shorting plug at certain distance for inserting mode converter. Butt-end of other ridge is directly connected to shorting plug; both ridges are free from dielectric and their edges on coaxial lead-in end are stepped to a certain extent to form wave impedance transformer. First step of this transformer closest to lead-in is part of mode transformer and last one abuts against regular H-plane waveguide turning into waveguide with edge gap of ridges gradually increasing toward aperture. Mode converter has two series-connected sections of transmission line of which first one closest to coaxial lead-in is section of coaxial line with rectangular external conductor and second one is section of coaxial line with U-shaped external conductor, their central conductor being mentioned exciter.

EFFECT: enlarged band, reduced dissipation loss in high-value end of superhigh-frequency band.

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