DUAL-RANGE AERIAL SYSTEM Russian patent published in 2006 - IPC H01Q21/00 

FIELD: radio engineering, applicable in ground and on-board radars.

SUBSTANCE: in a dual-range aerial system lengths l₁ of the longitudinal conductors of H-shaped symmetrical dipoles are selected within range l₂=(0.209 to 0.15)λ, where λ - the length of the operating wave. Lengths l₂ of the transverse conductors are selected within l₂=(0.05+-0.015) at l₁=0.209λ to l₂=(0.01+-0.0005)λ at l₁=0.15λ. Lengths l₃ of the symmetrical slots are selected within l₃=(0.18 to 0.005) at l₁=0.209λ to l₃=(0.146+-0.02)λ at l₁=0.15λ. Dielectric tubes with a wall thickness of (0.002 to 0.05)λ of material with dielectric constant ε=2 to 2.5 are installed on racks.

EFFECT: enhanced gain factor and enhanced antijamming capability of the low-frequency band of the array.

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