METHOD FOR SUPPRESSION OF NOISES IN RECEPTION OF ELECTROMAGNET WAVE OF CIRCULAR POLARISATION BY BIORTHOGONAL ANTENNA SYSTEM Russian patent published in 2009 - IPC H01Q3/00 

FIELD: physics, communication.

SUBSTANCE: invention is related to antenna engineering and may be used in radio engineering communication systems. Suppression of noises provides for reception of electromagnet wave of circular polarisation with the help of two orthogonal antenna systems, which are mutually inverted by 45°, transformation of received signals and formation of four signals with compensation of mutual effect of biorthogonal antenna system elements by means of weighed summation of transformed signals. Signals with effect of mutual influence compensation are used to find four hypothetical combinations of noise signal realisation, assuming that inclination angle of polarisation ellipse of summary noise signal is equal to one of angles α=-π/4.0, π/4 and π/2, then authenticity of each of four hypotheses is evaluated. The most authentic hypothesis is selected creating four summary signals for each hypothesis, minimum of which will correspond to authentic hypothesis. Four compensating signals are formed, which correspond to selected hypothesis. Four corrected signals are found by subtraction of four compensating signals from received signals, corrected signals are summed, creating output signal of biorthogonal antenna system.

EFFECT: high signal/noise ratio in process of reception.

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