PLANE ANTENNA Russian patent published in 2008 - IPC H01Q1/38 

FIELD: electricity.

SUBSTANCE: antenna is implemented in the shape of rectangular metal plate (1) or plate of clad dielectric material with slotted L-shaped groove (2), is mounted perpendicularly to conducting screen (3) and connected to it galvanically. Width of groove section (2), which is parallel to conducting screen (3), two times less then width of groove section (2), perpendicularly to conducting screen (3), and length of groove section (2) is equal to 1/3 of wavelength. In plate (1) of dimension 1/3-1/5 of wavelength are implemented at both sides of L- shaped groove (2) rectangular holes (4, 5), at that distance from holes edges (4, 5) till adjoin it plate edges (1) or groove edges (2) is 2-3 of groove section width (2) which is perpendicularly to conducting screen (3) and perpendicular edges of plate (1) are connected to appropriate holes edges (4, 5) by slot lines (6, 7) of width 0.5-1.5 mm. Coaxial cable armature is connected to conducting screen (3), and internal thread is connected to groove section (2) which is parallel to conducting screen from the groove end (2) at a distance 1/4-1/3 of groove length (2).

EFFECT: small dimensions; increased antenna beam width in E surface and increased scanning sector.

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