CIRCULARLY POLARISED COPHASED ANTENNA ARRAY Russian patent published in 2014 - IPC H01Q21/00 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio engineering and specifically to cellular mobile radio communication. The circularly polarised cophased antenna array comprises at least three identical antenna elements, each including, in one plane, two rectangular loops, each with a cut, the cuts being included in the loops of the antenna element symmetrically about the geometric centre of the antenna element near the feed points thereof, situated in the middle of adjacent sides of the rectangular loops, wherein the position of the cuts in the loops of the antenna elements relative the feed points of the antenna element determines the direction of rotation of circular polarisation. The length of the sides of the rectangular loops of the antenna elements is selected in the range of 0.2λ…0.24λ, where λ is the average wavelength of the operating range; the end of the conductor of each loop of the antenna element, opposite the feed point thereof, is connected to a section of a conductor perpendicular to adjacent sides of the rectangular loops of the antenna element, the length of said section lying in the range 0.01λ…0.04λ, change in said length being used to adjust input resistance of the antenna element, wherein the perimeter of the loop of the antenna element is selected in the range (0.9…1)λ, which, in the presence of a cut, leads to generation of a current distribution travelling wave in the loop of the antenna element, which facilitates circular polarisation.

EFFECT: improved uniformity of current distribution and wider operating frequency band.

3 cl, 6 dwg