METHOD OF FORMING RADIATION PATTERN OF RECEIVING PHASED ANTENNA ARRAY WITH CROSS-SHAPED UNFILLED APERTURE Russian patent published in 2024 - IPC H01Q21/06 H01Q3/40 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and can be used in radar to form a beam pattern of a receiving antenna system of the main channel of a radar station. Result is achieved by using a three-channel sidelobe suppression system (SLS), where a row and a column of a cross-shaped PAA are divided into two halves, from which total radiation patterns (RP) of channels MC1, MC2 and difference RP of channels SLS1 and SLS2 are formed. In addition, RP of channel SLS3 is formed as difference of total RP of channels MC1 and MC2. RP comparison is carried out in the following sequence: the total RP of each linear AA (MC1, MC2), formed earlier in the form of a weighted sum with its weight coefficients W, is compared with the difference RP of the same AA (SLS1, SLS2), after which each of the linear AA RPs is compared with the differential RP obtained by subtracting the previously determined two total RPs (SLS3) from each other. In case of simultaneous fulfilment for exceeding of signals of total RP of linear AA RP signal level in each channel of the SLS system, the sum of signals of two total RP of linear AA (MC1, MC2) is sent to the output of the RP generation system. Otherwise, no signal is sent to the output of the RP generation system. Also, according to the second version, a method of forming a radiation pattern of a receiving phased antenna array with a cross-shaped unfilled aperture consisting of AA with rectangular openings intersecting at an arbitrary angle, consists in the fact that equal separation of emitters of rectangular AAs, forming a cross-shaped PAA across the long side of its aperture, is preliminary performed, performing weighted summation of signals of emitters with weight complex coefficients, which specify amplitude-phase distribution of summation along lines AA, parallel to their short side with arbitrary amplitude distribution, for example, equal-amplitude, performing weighted summation of signals of lines parallel to short sides of AA, with weight complex coefficients, which specify amplitude-phase distribution, which forms RP of rectangular AA with required level of side lobes along the long side of AA, by halves of AA.

EFFECT: reduction of the level of side lobes of the radiation pattern (RP) for reception or complete absence of side lobes.

6 cl, 12 dwg