METHOD OF CONSTRUCTING A RADAR INTERROGATOR Russian patent published in 2020 - IPC G01S13/75 

FIELD: radar ranging.

SUBSTANCE: invention relates to radar ranging and can be used in radar systems for object recognition. An antenna system having a beam pattern (BP) with a primary beam and a suppression beam is used, in the transmission mode, generating a request code in the encoder in accordance with the interrogation mode of operation, it is modulated with a request signal and emitted into the space through the main BP; a signal to suppress side lobes is generated, which is emitted through the suppression beam. In reception mode, response signal from transponder is received by main receiving beam and suppression beam, amplitudes of said signals are compared to each other, wherein if the signal received by the primary beam exceeds the signal received by the suppression beam, decrypting it in the decoder, comparing with the response code feature set at the current time, processing the comparison results, determining the distance of the identified object and extracting the obtained flight information, using an antenna system in the form of a flat active phased antenna array comprising N transceiving channels (TC), in the reception mode, forming a primary receiving beam, a second receiving beam and a suppression beam by weighted summation of the received signals from the outputs TC, wherein the main and second reception beams maxima are spaced apart by a certain angle, forming the main transmitting beam and the suppression beam in the transmission mode by setting the phase relationships between the TC transmission parts or by using the TC portion to form the main transmitting beam, and remaining TC – for formation of suppression beam, receiving response signal from transponder main and second receiving beams and suppression beam, measurement of azimuth is carried out by means of summary-difference processing of signals from outputs of main and second receiving beams, and comparison of the amplitude of the signal received along the suppression beam is carried out with the sum signal of the main and second receiving beams, wherein the electronic scanning of beams BP in the azimuthal plane is carried out by setting the required phase relationships in the TC, which antenna elements are located horizontally, and if it is necessary to scan in the elevation plane, setting the required phase ratios in TC, antenna elements of which are located vertically.

EFFECT: increased sector of operation in elevation plane at fixed antenna system due to use of electronic scanning BP.

1 cl, 4 dwg