ANTENNA Russian patent published in 2013 - IPC H01Q9/00 

FIELD: radio engineering, communication.

SUBSTANCE: antenna includes a flat screen and four branches of radiating spirals, connected to each other in the top part of a hemisphere; one of the branches is connected by the second end to a lead cable and the remaining three branches are connected by second ends to the screen; the antenna further includes a second screen in form of a truncated circular cone lying between the flat screen and the hemisphere, sufficiently close to antenna coils. Between the flat screen and the second screen, there is a device for reducing the antenna effect of a looped cable, which is in form of three cable coils on a dielectric core.

EFFECT: improved antenna matching and reduced dependence of antenna characteristics on the length and position of the lead cable while maintaining external dimensions of the antenna.

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