Patent UA-42595-U (UA)
Title: Radar complex with digital phase high-discrimination antenna array
Inventor: HULEHA LEONID HRYHOROVYCH
IPC: H01Q21/00
Filed: 2009-02-26
Abstract: A radar complex with a digital phased high-discrimination antenna array comprises m-channel antenna system of receivers-radiating elements, m “Radiation– Reception” controlled switches connected via inputs-outputs to corresponding receivers-radiating elements, m radiation channels connected by outputs with “Radiation ” inputs of corresponding “Radiation – Reception” controlled switches, by inputs - to corresponding first m outputs of m+1-channel generator of radiation signals, m receiving amplifiers each of which comprises in series connected a first high-frequency (HF) amplifier input of which is input of a receiving channel, a preselector, an automatic gain control (AGC) attenuator a second HF amplifier, a first mixer“ conversion of frequency 1”(“C.F.1”) heterodyne input of which is connected with “C.F.1”inputs of first mixers of other receiving amplifiers and connected to “ Frequency1”(“Fr.1”) heterodyne output a first intermediate frequency (IF) filter, a signal amplifier of a first intermediate frequency, a second mixer, (“C.F.2”) heterodyne input of which is connected with (“C.F.2”) inputs of second mixers of other receiving amplifiers and connected to (“Fr.2”) of heterodyne, A filter of a second IF, a signal amplifier of a second IF, output of which is being output of the receiving channel, a digital signal processing system (DSPS), m analog inputs of which are connected with outputs of m receiving channels, a central control system for parameters measuring (CCSPM) connected by “Azimuth” input of digital exchange channel to a navigation system of a carrier, “Commands” output of a control bus to control inputs of m “Radiation– Reception” controlled switches, a generator of radiation signals, AGC attenuators of m receiving amplifiers, the digital signal processing system (DSPS), which characterizes by that the antenna system is made as circular, cylindrical array of receivers-radiating elements that comprises in an inside hollow a coaxial test signal cylindrical radiator of calibration m receiving channels (receiver-radiating elements + “Radiation– Reception” controlled switch +receiving amplifier) connected by its input with m+1 outputs of test signal of a radiation signal multi -channel generator to the digital signal processing system (DSPS) that includes an analog-to-digital conversion (ADC) unit, m analogue inputs of which are inputs of the digital signal processing system (DSPS), connected in series: the unit of forming M beams of low discrimination, the frequency-time processing unit. It is added a unit of amplitude-phase compensation of m receiving channels, input of which is connected to ADC unit output, a unit of azimuth stabilization –forming output data of M “phantom circuit” of circular antenna array, connected by input to output of the unit of amplitude-phase compensation of m receiving channels, its output is connected with input of the unit of forming M beams of low discrimination, a unit of secondary spatial processing of high discrimination, input of which is connected with output of the frequency-time processing unit. Output of”Spatial-time processing Data”, as well as "Complex amplitudes of receiving channels output signals "of the unit of amplitude-phase compensation of m receiving channels by data bus are connected to "Data” input of the central control system for parameter measuring (CCSPM). Control inputs of the unit of amplitude-phase compensation of m receiving channels, the unit of azimuth stabilization of – forming of M output data of circularly antenna arrays, the unit of forming M beams of low discrimination, the frequency-time processing unit, the unit of secondary spatial processing of high discrimination are connected by control bus with output “Commands” of CCSPM.