IONOSPHERIC SIGNAL DIRECTION-FINDING METHOD Russian patent published in 2014 - IPC G01S3/14 

FIELD: radio engineering, communication.

SUBSTANCE: new minimum base antenna system is formed. The maximum value of the two-dimensional beam pattern $$U\left({\alpha }_s^{\text{'}},{\beta }_s^{\text{'}}\right)$$ of the minimum base antenna system is used to estimate, in conditions of receiving two beams, a stable single-beam value of the azimuth $${\alpha }_s^{\text{'}}$$ and elevation angle $${\text{β}}_{\text{s}}^{\text{'}}\text{,}$$ that solution is further refined by a two-beam solution within a limited four-dimensional area $${\alpha }_1^{\text{'}}={\alpha }_s^{\text{'}}\pm 10\mathrm{deg}rees,$$ $${\alpha }_2^{\text{'}}={\alpha }_s^{\text{'}}\pm 10\mathrm{deg}rees,$$ $${\beta }_1^{\text{'}}={\beta }_s^{\text{'}}\pm 10\mathrm{deg}rees,$$ $${\beta }_2^{\text{'}}={\beta }_s^{\text{'}}\pm 10\mathrm{deg}rees.$$ The two-dimensional beam pattern $$U\left({\alpha }_s^{\text{'}},{\beta }_s^{\text{'}}\right)$$ is formed using a certain computation expression. The region for determining the stable single-beam solution $${\alpha }_s^{\text{'}}$$ $${\beta }_s^{\text{'}}$$ is the azimuth interval 0-360 degrees and the elevation angle interval 0-90 degrees. Stability of estimates of the azimuth and elevation angle and a wide frequency range are provided by using a phase difference of two adjacent dipoles ψn+1-Ψn when forming the two-dimensional beam pattern of the antenna system.

EFFECT: shorter time for determining angular parameters of a two-beam ionospheric signal.

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