ACTIVE PHASED ANTENNA ARRAY DIGITAL BEAMFORMING METHOD WHEN EMITTING AND RECEIVING CHIRP SIGNAL Russian patent published in 2014 - IPC H01Q21/00 G01S13/26 

FIELD: radio engineering, communication.

SUBSTANCE: invention may be used in radar stations with active phased antenna arrays (APAA) during digital beamforming and use as probing pulsed wideband chirp signals. In the transmit operating cycle of the APAA, quadrature components of the complex envelope of the chirp signal are generated; the signal is converted to digital in each quadrature component; the digital signal is distributed across antenna elements; the obtained signal is converted to analogue and its spectrum is transferred to the low frequency region, amplified and emitted by an antenna element to form a resultant beam pattern (for transmission); in the receive operating cycle of the APAA, signals received in each m-th antenna element are amplified; their complex envelopes are selected; the obtained complex envelopes of the signals are converted to digital; a resultant beam pattern (for transmission and reception) is obtained for each digital reading of the complex envelope of the received signal.

EFFECT: wider transmission band of an active phased antenna array during digital formation of its beam pattern for both transmission and reception and during use as a probing pulsed wideband chirp signal.

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