SPIRAL ANTENNA Russian patent published in 2014 - IPC H01Q11/00 H01Q1/36 

FIELD: radio engineering, communication.

SUBSTANCE: spiral antenna containing a combined spiral is added with a directivity pattern corrector made in the form of a metal cone installed coaxially with an antenna at the distance of 0.2 λ up in front of coils of a flat spiral; cone base has diameter of 0.2 λ up and apex angle of about 60°; vertex of the cone is directed to the spiral centre, and the cone itself is installed inside a hollow dielectric cylinder fixed on the central part of the flat spiral.

EFFECT: enlarging an antenna directivity pattern in the upper part of a working range.

1 dwg