BROADBAND FOLDED ANTENNA Russian patent published in 2010 - IPC H01Q7/00 

FIELD: radio engineering.

SUBSTANCE: device comprises identical first and second conducting loops, with the first and second conducting partitions arranged in one plane symmetrically to axis of antenna and oriented with their ends towards each other, the third and fourth conducting loops with the third and fourth conducting partitions, which are identical to the first and second loops with partitions arranged in plane of the first and second loops symmetrically relative to axis of antenna and forming the second row of loops with partitions, where each element of loops is distant from analogue element of the first row loops at the distance equal to (0.20 - 0.25) λ_min, where λ_min - minimum working length of wave, two matching transformers and two resistors, summator of signals and two sections of coaxial cable, one of which is connected to outlet of the first matching transformer, and the end - to the first input of signals summator, and the second one - is connected to output of the second matching transformer and with the second input of signals summator, besides output of signals summator forms output of antenna.

EFFECT: improved noise immunity due to narrowing of directivity pattern and increased coefficient of its protective action.

7 cl, 2 dwg, 1 tbl