WAVEGUIDE-SLOT ANTENNA ARRAY AND ITS POWER SPLITTER Russian patent published in 2008 - IPC H01Q21/06 H01P5/12 

FIELD: microwave radio engineering; radars.

SUBSTANCE: proposed antenna array incorporating power splitters and array of waveguide-slot stripline radiators (strips) has its power splitter made in the form of two boards; it has slow-wave structure in the form of E-plane folded serpentine waveguide and members providing coupling with strips. Coupling members are essentially coupling windows and matching projections. Coupling windows are made in waveguide narrow wall of one power splitter plate and matching projections, against coupling members on other waveguide narrow wall of other power splitter plate. Power splitter longitudinal axes incorporating even- and odd-numbered strip coupling members are spaced apart through integer number of quarter-wavelengths in power splitter waveguide. Each strip is essentially rectangular waveguide whose narrow wall has alternately inclined slots. Even-numbered strips have their slots inclined in specular direction relative to that of odd-numbered strip slots and difference in lengths of even- and odd-numbered strips equals amount of displacement of power splitter longitudinal axes.

EFFECT: reduced side-lobe level and standing-wave voltage ratio at normal-frequency power splitter input, amplifier gain, directive gain, and antenna sheet utilization factor.

6 cl, 2 dwg