HORN COLLINEAR MICROSTRIP ANTENNA Russian patent published in 2010 - IPC H01Q21/10 

FIELD: radio engineering.

SUBSTANCE: antenna comprises N cascade-connected sections of microstrip lines made of strip and screen arranged coaxially on rectangular dielectric substrate along its longitudinal axis of symmetry on both sides, electric length of which 1 equals half of wave length in the middle of specified band of working frequencies l=λ_middle/2, and also two shunts, two additional screens (AS), coaxial cable with according links and metal horn in the form of straight cylinder truncated at the angle β with rectangular section, contour of which coincides with contour of dielectric substrate (DS). DS is installed inside horn parallel to its back wall at the distance of (0.4-0.6)λ_middle. The first and second AD are electrically connected to small narrow side walls of horn. Opposite to the first AS on the other side of DS between the first strip and small narrow side wall of horn there is a loop circuit arranged as made of three strips outgoing of one point, which are connected to screens. Conditions are described for selection of width of each of elements in N sections of microstrip lines and according n screens, as well as conditions for selection of the first and second AS width.

EFFECT: increased relative bandwidth, providing for improved amplification ratio.

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