METHOD FOR ELIMINATION OF THE NEGATIVE IMPACT OF THE UNEVEN FREQUENCY RESPONSE OF THE ANTENNA SYSTEM Russian patent published in 2022 - IPC G01S7/40 H01Q3/26 H04B17/12 

FIELD: radar signals processing.

SUBSTANCE: invention relates to methods for processing radar signals with carrier frequency tunability or ultra-wideband signals and can be used to form air object classification features in the form of radar portraits (RP). The effect is the development of a universal method for eliminating the negative impact of the uneven frequency response of the antenna system, which is indifferent to the type and shape of the antenna, as well as the dependence of the amplitude of the reflected signal on the range in the interests of the correct use of portrait (radio vision) modes in radars and subsequent classification. To solve the problem for the intended use of the antenna system, a series of experiments is carried out with reference reflectors of radio waves placed in the far zone and fixing the level received by the antenna and transmitted to the radar signal receiver. A series of experiments should involve measuring and recording the levels of incoming (reflected) signals from objects at different distances. Based on the results of the experiments, the coefficients of unevenness of the frequency response and the unevenness of the average amplitude of reflections from the reference reflector from different s-x elements of resolution in range are calculated. The unevenness coefficients are summarized in a two-dimensional data array with N rows and S columns. Before using in radio vision procedures, the fixed reflection amplitude from the object is converted into a normalized amplitude using a correction factor extracted from the generated data array.

EFFECT: development of a universal way to eliminate the negative impact of the unevenness of the frequency response of the antenna system, which is indifferent to the type and shape of the antenna, as well as to the dependence of the amplitude of the reflected signal on the range in the interests of the correct use of portrait (radiovision) modes in radars and subsequent classification.

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