Radar measurement system |
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IPC classes for russian patent Radar measurement system (RU 2486539):
 Method to imitate double-frequency radio signals / 2485541
Method to imitate radio signals is designed for testing of tracking systems of pulse radar stations (RS). The entire cycle of imitation is divided into two time signals. During the first interval the pulses received from the RS are range-stolen. During the second interval two pulse sequences are generated, which are shifted in time and spaced by frequency. The time shift is arranged as slowly changing, for instance, in accordance with the harmonic law, at the same time harmonics for both frequencies have one and the same frequency, but are phase-shifted. The frequency separation is carried out in two stages: at first the shift is carried out by the value
 Apparatus for measuring scattering cross-section of large-size objects / 2483317
Apparatus for measuring scattering cross-section (SCS) of large-size objects, having series-connected pulsed transmitter, antenna switch, antenna, receiver and computer, the second input of which is connected to a control panel, the second input/output of which is connected to the main rotary support on which the measured object is placed, the third input/output of the control panel is connected to an additional rotary support at whose centre there is a SCS metre, which is in form of a triangular angle reflector, wherein the additional rotary support is mounted on a linear displacement device which is connected to the fourth input/output of the control panel, wherein the additional rotary support is placed between the main rotary support and the transmitter in the same pulsed volume with the measured object.
 Method of calibrating radar station operating on circularly polarised waves with parallel reception of reflected signals based on value of effective radar cross-section during dynamic measurement of effective radar cross-section of ballistic and space objects / 2477496
Invention can be used when calibrating radar stations from the effective radar cross-section (ERC) value. The disclosed method involves launching a booster rocket (BR) with a reference reflector (RR), irradiating the reflector with radar signals, receiving and measuring the amplitude of the reflected signals. As an ERC reference, an angle reflector (AR) is transported to an altitude higher than 100 km, said AR consisting of two flat radar-reflecting half-discs turned at an angle ranging from (90-Δ)° to (90+Δ)°, where Δ is determined from the ratio 0<Δ<18λ/a, λ being the wavelength of the calibrated radar station. Before launching, the AR is put into a guiding container, while aligning the longitudinal axis of the container with the bisector of the angle between faces of the AR. Before separating the AR from the BR, the last stage of the BR with the container is positioned by the BR control system such that the longitudinal axis of the container is directed along the line of sight of the radar station. The AR is separated from the BR on the line of sight of the radar station such that the main lobe of the scattering indicatrix of the AR is directed towards the radar station, and its maximum coincides with the line of sight of the radar station. The AR is also spun around an axis which coincides with the bisector of the angle between its faces.
 Method of calibrating radar station from effective radar cross-section value during dynamic measurement of effective radar cross-section of analysed objects / 2477495
Invention can be used when calibrating radar stations from the effective radar cross-section (ERC) value. The disclosed method involves launching a reflector with a known ERC value to an orbit around the Earth, irradiating the reflector with radar signals, receiving and measuring the amplitude of the reflected signals. As an ERC reference, an angle reflector (AR) is transported to a satellite orbit, said AR consisting of two flat radar-reflecting half-discs turned at an angle ranging from (90-Δ)° to (90+Δ)°. Before launching, the AR is put into a guiding container, while aligning the longitudinal axis of the container with the bisector of the angle between faces of the AR. The container is mounted on-board the spacecraft. The spacecraft is positioned such that the longitudinal axis of the container is directed along the line of sight of the radar station. The AR is separated from the spacecraft on the line of sight of the radar station such that the main lobe of the scattering indicatrix of the AR is directed towards the radar station, and its maximum coincides with the line of sight of the radar station. The AR is also spun around an axis which coincides with the bisector of the angle between its faces.
 Radar high-frequency frequency-modulated doppler signal simulator / 2469348
Radar high-frequency frequency-modulated Doppler signal simulator is meant for use in complex signal generators, as well as in modulating systems for testing and investigating radio engineering systems. The system includes two phase modulators, a balanced modulator, a phase detector, a controlled high-frequency signal generator, a directional coupler, a controlled attenuator, connected to each other in a certain manner.
 Method of calibrating active phased antenna array / 2467346
Invention relates to antenna equipment and is meant for calibrating active phased antenna arrays. The method of calibrating an active phased antenna array, in which in order to calibrate the receiving part of the transmit-receive channel, a control signal is transmitted to the input of the receiving part of each channel; parameters of the received signal are measured; adjusting coefficients which are used to adjust parameters of the receiving part of the channel are formed based on the measurements; to calibrate the transmitting part of the transmit-receive channel, a control signal is transmitted to the input of the transmitting part of each channel; parameters of the transmitted signal are measured; adjusting coefficients which are then used to adjust parameters of the transmitting channel are formed based on the measurements; calibration of the receiving part of the transmit-receive channels is carried out in pairs in receive mode, wherein the control signal is picked up from the output of the receiving part of the transmit-receive channels; calibration of the transmitting part of the transmit-receive channels is carried out in pairs in transmit mode, wherein part of the signal power tapped from the output of the corresponding transmit-receive channel and passing through the receiving part of that channel is used for calibration; during calibration, phase shift and amplitude difference of the signal from the output of the calibrated channel relative the reference channel are determined; the same reference channel is used for calibrating all channels.
 System for built-in control and calibration of monopulse radar station / 2459219
During control, a portion of probing signal power, which is fed to a circuit signal simulator and through a circulator to an adder with a heterodyne simulator signal, is output from a monopulse radar station; the resultant signal is fed to a mixer, conveyed at an intermediate frequency and is fed to a recirculation circuit, which is built on series-connected second adder and delay line, where the damped batch of delayed pulses returns to the mixer, where it is conveyed at carrier frequency using the heterodyne signal, passes through the circulator to series-connected valve, test antenna and radio communication channel to the antenna of the monopulse radar station. The processor of the monopulse radar station controls the process of built-in control in signal search, capture and tracking modes; measurement of bearing characteristics takes place based on target search results with scanning of the antenna system; capturing and tracking results are used to determine coordinates of the simulated target, controlled parameters of the transmitter, the receiver and signal of the detector; by comparing the controlled parameters with rated values, the processor determines accuracy of the monopulse radar station and deviation of calibration, which it then stores and takes into account when measuring coordinates of targets during combat.
 Method of calibrating mobile shortwave direction finder with multielement antenna array / 2451948
Invention can be used to calibrate radio signal source direction finders, particularly mobile shortwave (SW) direction finders with a multielement antenna array (AA). The method involves measuring the required number of positions of the radiator for control measurements, the distance between the position of the control radiator (CR) and the closest antenna component (AC) and the coordinate of the positions for installing the CR; receiving a control signal for an N-element distributed AA; frequency selection and measurement of the phase of the received signal pulses; selection of a reference AC, after which CR are successively installed at each given position; determining the initial disparity of measurements of phase difference between each (N-1)-th and the reference AC; and the mean-square deviation (MSD) of the measurement results is calculated; through successive iterations, adjustments are made to the estimate of true coordinates of the AC and the estimated phase defects of feeders and the disparity of phase difference between each (N-1)-th and the reference AC for each position of the CR is re-determined, thereby achieving the minimum attainable MSD of measurement results; and the coordinate values of phase centres of the AC and allowable values of phase offset of the AA feeders, needed for measuring bearings, with minimum error, to signal sources monitored by the mobile direction finder, are determined.
 Radar systems power supply control device / 2449343
Device to control power supply to radar systems comprises the following: a clock pulse oscillator; a reprogrammable logic circuit (PLIC); comprising a logical device; four tumblers; three power supply sources; three relays; three generators of bit commands; three light diode indicators; and eight noise eliminators included into the PLIC, each including two pulse counters, an inverter, a trigger; and links between them.
 Imitator of moving objects / 2449308
Imitator of moving objects comprises a synchroniser, a unit of signal imitation control, three frequency modulators, a pseudorandom signal generator, a low pass filter, two generators of movable strobes, two strobing units, six controlled attenuators, a controlled noise generator, a controlled delay element, a summator, two phase commutators and three amplifiers of intermediate frequency that are connected to each other in a certain manner.
 Method of adjustment of optical axis of viewfinder and electrical axis of aerial / 2252427
Viewfinder is disposed at specific distance from mechanical axis of aerial. Viewfinder is tightly connected with antenna aperture plane. Optical axis of viewfinder is directed in parallel to mechanical axis of aerial. Then electrical axis of aerial is guided to phase center of ancillary aerial which is disposed together with geodetic mark onto post. Optical axis of viewfinder is guided onto geodetic mark. Geodetic mark is tied to angular position detectors and stays apart from phase center of ancillary aerial for distance being equal to shift of viewfinder from mechanical axis of aerial to the plane of normal optical axis of viewfinder. Optical axis of viewfinder is guided onto center of aperture of ancillary aerial. Difference in coordinates is determined by angle of location of initial and final position of viewfinder optical axis. Sword is turned around axis being perpendicular to plane of sword and crossing center of ancillary aerial aperture by angle determined by the relation given in the description of the invention. Electrical axis of aerial is guided onto phase center of ancillary aerial and optical axis of viewfinder is guided onto geodetic mark.
 Target fluctuating signal generator / 2253129
The device having a control panel, storage unit, synchrosignal generator, first, second and third on-line memories, unit for formation of target relative coordinates, unit for formation of the maximum target signal intensity, first, second, third and fourth synchronizers, unit for formation of the current intensity of the target signal, digital-to-analog converter, noise generator, adder uses also a correlator, first and second detectors, first and second multiplier units, first and second random number generators, which provides for formation of amicably fluctuating and quickly fluctuating bursts of pulses reflected from the radar targets, internal noise of the receiver and synchronizing signals at the output of the radar receiver in the rate of radar functioning and with due account made for motion of the ship-carrier.
 Generator of reflected radar signals from disturbed sea surface / 2253130
The device has a control panel, memory unit, preliminary recording control unit, unit for formation of carrier relative coordinates, readout and synchronizing unit, on-line memory unit, unit for formation of video signal, unit for formation of carrier polar coordinates, noise formation unit.
 Mode of controlling working capacity of airborne receiver indicator of satellite radio navigational system / 2254591
The mode is that the altitude HRA of the flight of a flying vehicle is measured with the help of installed on it a radio altimeter (RA), the altitude hr of an area above which a flying vehicle flies at the moment of the altitude measuring using for this purpose data about planned coordinates from the output of the receiver indicator of the satellite radio navigational system and digital map of an area, an absolute altitude Ha= HRA +hr, is calculated and compared with the altitude HRI, taking from the output of the receiver indicator and a signal of its working capacity is formed if |Ha- HRI| is smaller than the installed threshold Th.
 Radio-signal dynamic memory device having series binary fiber- optic system / 2255426
In order to enhance identity of copy generation while retaining ability of controlling input radio signal replication process, proposed device is provided with newly introduced (N -1) fiber-optic four-terminal networks, each of them incorporating Y-type internal adding and separating fiber-optic directional couplers.
 Radio engineering training device / 2260193
Device has radio-location station, first high-frequency generator, modulator, first counter, scanning generator, second counter, heterodyne, first mixer, first intermediate frequency amplifier, first amplitude detector, video-amplifier, third counter, cathode-ray tube, second, third and fourth high-frequency generators, first and second adders, switches, phase-rotators and on 90°, second mixer, second intermediate frequency amplifier, multiplier, narrow-band filter, second amplitude detector, key and frequency converter.
 Method for adjustment of radiolocation station antenna / 2262117
Method includes using auxiliary antenna and geodesic mark, linked with indicators of angular position of target antenna, viewfinder is positioned near opening of subject antenna, rigidly linked to opening plane of subject antenna. Flat metallic screen is inserted, to which emission from auxiliary antenna is directed, auxiliary antenna and geodesic mark as light source are positioned behind subject antenna at remote zone distance. Electric axis of subject antenna is directed using its rotation gear according to one of minimum methods to phase center of auxiliary antenna, screen is mounted so, that beams, falling o it from auxiliary antenna and geodesic mark, were reflected respectively to whole plane of opening of target antenna and inlet eye of viewfinder. Angular deflection of optical axis of viewfinder from direction to center of image of geodesic mark on screen determines adjustment of target antenna.
 Radar target simulator / 2267798
The radar target simulator has a super high frequency module consisting of successively connected arrangements: an automatic regulator of power, an impulse modulator, an amplitude modulator, a switch of the power level and a digital attenuator, a communication line, a horn antenna, a group of keys, the first semiconductor storage, an interface of a multiplex bus, a synthesizer of Doppler frequencies, a second semiconductor storage and a multiplying digital-analogue converter. The increasing of the accuracy of the installation of the output power is provided due to possibility of its correction by way of changing the intensity of the amplitude modulation of the super high signal for each meaning of the value of fading.
 Emulation device of an active response radar connected with a surveillance radar / 2268477
It is also used for instruction and training of the operators of the surveillance facilities connected with an active response radars in the conditions of the presence of a great number of targets moving on complex trajectories. The essence of the invention is in that the arrangement holds an oscillator of the signals of the targets including the targets carrying responders. In it there is a control panel of the active response radar, a selector of characteristics of response signals, a synchronizer of response signals, an operating response signals storage device, a decoder of the characteristics of response signals, a counter of tact impulses, a former of identification markers and an adder unit with their connections that provides emulation of the operation of the active response radar connected with the surveillance radar at changing their modes of operations in the process of obtaining radar information about common and individual characteristics of the target carrying a responder in the zone of operations of the mentioned radar facilities with the purpose of verification of their terminal facilities of the secondary processing of radar information, instruction and training of the operators of the surveillance radar.
 Method of controlling of an airborne mono impulse radar station with a built-in unit and an arrangement for its realization / 2268478
The essence is in that in the reference point of the bearer of the rocket or of the streamlined antenna cover a sound is installed. It is made in the shape of a half-wave antenna whose arms are linked up to a nonlinear element. At receiving the order «Control» the transmitter of the airborne mono pulse radar station forming super high frequency vibrations on the carrier frequency fc is connected with the power detector and its power is evaluated, vibrations on the super high frequency fo which is in n times less than the frequency fc are created and delayed in time relatively to the super high signals of the transmitter of the frequency fc and the sound reradiating the signal on the frequency fc is exposed to them. These signals are received and processed with standard facilities of the airborne mono impulse radar station, the imitated distance, the angle α of the azimuth and the place β are measured and compared with the specified parameters and decision about the efficiency of the airborne mono impulse radar station is accepted if the power of the transmitter is no less than admissible and the differences of the specified and the measured angles α and β do not exceed the admissible meanings.
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FIELD: radio engineering, communication. SUBSTANCE: radar measurement system, which has a transceiver, a rotary support with a platform, a low-reflecting support and a rotary drive, a measurement object placed on the low-reflecting support, also has a series-connected electronic digital computer for generating arrays of measurement results, an interfacing and display unit, a platform drive control unit, as well as two sensors of the turning angle of the platform on the azimuth, mounted on the platform and connected to a unit for forming bearing angle discretisation marks, which is connected to the interfacing and display unit directly and by feedback, and the digital electronic computer is connected to the transceiver directly and by feedback. EFFECT: high accuracy of calculating statistical characteristics of circular and sector diagrams of the effective radar cross-section by reducing discretisation intervals denoted by marks. 2 dwg
The invention relates to radar systems, in particular to radar measurements, and can be used when creating new radar measurement systems and upgrading existing ones. A known system of continuous radiation for measurement of radar cross section (effective surface scattering (EPR)) targets containing the transceiver rotation device with the drive and recorder [1, s]. In this unit information about the rotation angle of the object comes from a turntable in increments not exceeding one angular degrees. A disadvantage of the known system of continuous radiation for measurement of radar cross section (RCS) is a small (360 points) discretization pie charts EPR, which leads to large errors in the calculation of the statistical characteristics of the EPR (mean, variance, and others). Also known complex of RAT SCAT for measuring radar cross-section targets (EPR) [1, s]containing the transceiver rotation device platform and drive. On the rotary device is the object of measurement. This complex is selected for the prototype. The disadvantage of this complex is insufficient discretization of the azimuthal angle (within 0.1°), which bring the errors calculating statistical characteristics of the EPR, more than 3-4 dB. The technical result of the present invention is to improve the accuracy of the calculation of the statistical characteristics of the EPR (the mean, variance and other) due to the reduction of the sampling intervals, denoted by the labels, pie and pie charts EPR. To achieve a technical result in the radar measurement system that contains the transceiver, the rotation device platform, malatrasi support and rotational drive, a dimension object mounted on malatrasi support entered serially connected electronic digital computing machine (EDCM), intended to form an array of measurements, the connection unit and the display unit drive control platform, but also introduced two angle sensor platform in azimuth mounted on the platform and connected to the processing unit labels for the discretization of the angles of azimuth, which is connected to the connection unit and display the direct and feedback, and EDCM connected with the transceiver direct and feedback. Figure 1 presents the block diagram of the radar measurement system. Figure 2 presents the algorithm of functioning of the radar measurement system. Radar measurement system (figure 1) consists of: pickup is operatica 1; EDCM 2; block mates and zone 3; unit generating control signals 4; block drive control of the rotation of the platform 5; drive turntable 6; platform 7; malatrasi supports 8; dimension object 9; two angle sensors platform 10-1, 10-2; forming unit labels for the discretization of the angles of rotation 11. Radar measuring system works as follows (Figure 2). The transceiver 1 provides sensing of the object of measurement 9 installed on malatrasi support 8, and the reception of the reflected signals. During the rotation of the platform 7 is written circular or pie chart of the inverse radiation signal, which is in the form of amplitude and phase registers EDCM 2. In EDCM 2 set the automatic movement of the platform 7. The interface block and zone 3 provides an indication of the passing of commands and a pair EDCM 2 analog devices unit 4. Unit 4 generates the analog control signals and transmits them to the control unit of the actuator 5, which comprises a drive 6 platform 7. Include the selected mode of motion of the platform 7, for example, clockwise. Upon actuation of the first sensor 10-1 runs the label generator for the discretization of the angle of rotation of the platform 7 in block 11. Block sampling 11 provides for the issuing 18640 labels in pie and pie is where the chart EPR. When the approach of the next label for the discretization of the angle of rotation of the platform 7 in EDCM 2 is the count values of the amplitude and phase of the reflected signal from the object 9. Thus is formed an array of measurements EDCM 2. Upon actuation of the second sensor 10-2 stops platform 7. Calculation of the statistical characteristics of amplitude and phase (mean, variance, and other). Then starts the reverse mode and the movement of the platform 7 to the original position. When passing the first sensor 10-1 is stopping the platform. Element base blocks. EDCM 2 type IBM PC Pentium 4. The transceiver unit 1 is typical. Interface unit and display unit 3 is assembled on the chip series LS and LEDs. Unit generating control signals 4 consists of an optocoupler type THAT 125-125 and ALS D. The control unit of the actuator 5 is composed of commercially available starters motors. The rotation drive platform 6 comprises an electric motor AAM 561 RL with gear. The angle sensors platform 10-1, 10-2 are collected on the basis of reeds. The set of labels for the discretization of the angles of rotation of the platform 11 consists of its encoder (purchased product), logic circuits 5 series and transistors. The availability of components and its fame show is that the invention can satisfy the condition of patentability "industrial applicability". The analysis of the prior art reveals that technical solutions are characterized by a set of characteristics is identical for all signs contained in proposed by the applicant claims to be missing, that indicates compliance of the claimed invention, the patentability criteria of "novelty". Search results known solutions in this and related areas of technology in order to identify characteristics that match with the distinctive features of the claimed device, showed that public sources are not identified solutions that have the signs consistent with its distinguishing characteristics. The prior art also has not been confirmed by the known influence of the distinctive features of the claimed invention specified by the applicant, the technical result, therefore, the claimed invention meets the condition of "inventive step" Literature. 1. Blacksmith P., Hyatt R.E., Mack W. Introduction to methods of measurement of radar cross-section targets. TIER, t. No. 8. 2. Marlowe, Watson and van ascent of Keter. The complex RAT SKAT to measure the radar cross-section targets. TIER. 1965, t, No. 8. Radar measuring system containing a transceiver rotation device platform, malatrasi support and rotational drive, the volume of the t dimension, mounted on malatrasi support, characterized in that it introduced serially connected electronic digital computing machine (EDCM), intended to form an array of measurements, the connection unit and the display unit generating control signals, the control unit rotational drive, and also introduced two angle sensor platform in azimuth mounted on the platform and connected to the processing unit labels for the discretization of the angles of azimuth, which is connected to the connection unit and display the direct and feedback, and EDCM is connected to the transceiver direct and feedback.
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