RU2549884C1 - Radar scene signal simulator - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: method is carried out by replacing antennae of simulators and drives thereof with an antenna with a mobile phase centre, consisting of N radiators arranged linearly at an equal distance less than the wavelength in the propagation medium of the electromagnetic wave, from which m adjacent radiators at an appropriate moment in time are connected in-phase to a signal simulator through unmatched dividers and unmatched microwave switches, located in the branching feeder line from the divider to the radiator, as well as by introducing into the simulator circuit a register for rewriting the code of the position of the group of connected radiators under control of processor and providing change in the position of the phase centre of the virtual antenna. To simulate multiple targets, the radiation phase centre is moved into multiple positions while processing the signal at the station. The simulator comprises a digital delay line, parameters of which are switched synchronously with movement of the radiation phase centre.

EFFECT: simple device while improving reliability of simulation.

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Description

The present invention relates to radar, in particular, to simulators of a radar signal of a scene in which a wide range of angles are moving in range and angle of the target, and can be used to study the processes of detection and tracking of targets by a radar station in a wide range of ranges and angles .

A known target simulator [1], operating in an anechoic chamber in which the signal of the tested radar is received through a receiving antenna, is transferred to an intermediate frequency, is delayed in time in accordance with the range of the simulated target, is shifted by the Doppler frequency in accordance with the radial speed of the simulated target, is modulated in amplitude, in accordance with the effective scattering area (EPR) of the target and its distance from the radar being checked, it is transferred back to the carrier frequency, radiated through the transmitting antenna as an imitation target signal. Simulation of the angular movement of the target can be performed by controlled mechanical movement of the simulator antenna over a sphere whose center is the radar being checked.

The disadvantage of the simulator is its complexity, since for the implementation of the radar scene in the entire sector of the scanning angles of the radar antenna, a large size of an anechoic chamber, complex electromechanical drives and simulators with an amount equal to the number of scene elements are required.

Known simulator of the target [2], located in an anechoic chamber containing a large elliptical reflector mounted in the far zone of the radar antenna. The radar itself is located in one of the focal points of the ellipsoid, while in the second focus is the emitting element of the simulator in the form of a multipath phased antenna array (PAR). Many microwave signals are modulated according to the parameters corresponding to the parameters of the simulated targets, they are emitted by the HEADLIGHTS by independent beams and, after re-reflection from the elliptical reflector, are received by the antenna of the tested radar. In addition, each beam reflected from an elliptical reflector imitates a signal from an individual target or a resolvable element of the scene. The level of signals received by the radar antenna is determined not only by the level of the signals generated by the simulator in the direction of the PAR headlights and reflected from the ellipsoid, but also by the mismatch of the simulator beam reflected by the ellipsoid relative to the current direction of the axis of sight of the checked radar.

The disadvantage of the simulator [2] is its complexity associated with the manufacture of an anechoic chamber and an elliptical mirror with the required accuracy of large sizes and complex PAR.

A device for simulating a radar signal of a scene of a matrix type [3], which is installed in the far zone of the checked radar on the end wall of the anechoic chamber, contains many echo antennas that are irradiated by the radar of illumination and the antenna of the checked radar. The angular positions of the echo antennas correspond to the angular positions of the elements of the simulated scene (goals). Each echo antenna is connected through a mixer to a corresponding echo simulator that generates a signal of one of the targets, delayed in accordance with the target range, with a duration equal to the duration of the radar probe signal, shifted in frequency by the value of the Doppler frequency of the signal reflected by the target, modulated in amplitude in accordance with the range of the target, its effective scattering area (EPR) and the random law of amplitude fluctuation. The echo signal of the simulator through the block of controlled switches enters the antenna, the angular position of which corresponds to the simulated target and is emitted. The controlled connection of the signal generated by the echo simulator with the emitting antennas of the echo signal through a block of controlled switches provides simulation of the target’s movement along the angle.

This device provides imitation of several targets and their movement in space, but since the number of antennas and simulators of echo signals that simulate target signals that differ in angular position is equal to the number of simulated elements of the radar scene, then in the simulator, for example, for radars with a synthesized aperture and high angular resolution in a fraction of a degree, you need a large number of mixers, simulators and antennas having small angular dimensions. The required transverse dimensions of the anechoic chamber, as in devices [1] and [2], are large. Such a system is difficult to implement. In addition, with a small size of the simulator antennas, the transmission coefficient of the path of the radar antenna is the receiver, the transmitter of the simulator is significantly reduced, which reduces the stability and reliability of the relay simulators [4].

The closest in technical essence to the claimed simulator of the radar signal of the scene is a simulator [5], adopted as a prototype. In the simulator of the radar signal of the scene [5], reduced requirements for the dimensions of the anechoic chamber in the transverse direction while reducing the number of antennas and simulators of echo signals, and at the same time smooth movement of targets is realized. To do this, in the anechoic chamber, the antenna of the tested radar is located at one end, and N echo signals spatially spaced along the angle of the antennas are placed at the opposite end, and each n-th antenna is connected to the microwave input (output) of the nth echo signal simulator. Between the radar antenna and the echo antennas, in the near zone of the radar antenna, there are fixed and moving flat mirrors. The fixed mirror reflects the plane wave of the signal radiated by the radar antenna 1 towards the moving mirror 3, the angle of which is regulated by the drive of the moving mirror. By adjusting the angle of inclination of one of the reflecting mirrors relative to the current position of the axis of the radar antenna, the echo signals are irradiated only at the calculated viewing angles of the radar antenna. The radar signal through each echo antenna irradiated at a given moment of time arrives at the corresponding echo signal simulator, where it is delayed, shifted by the Doppler frequency and modulated in amplitude in accordance with the range, radial velocity, effective scattering area and random fluctuation law of the nth targets entered on the echo simulator from the control system. The echo signals generated by the echo signal simulators are emitted back through the corresponding simulator antennas, and are reflected by moving and stationary mirrors towards the radar antenna as a simulated signal of n targets. The movement of targets in the angle inside the antenna pattern (BOTTOM) of the radar is provided by the movement of the antennas of the simulators using appropriate drives. Simulation of the angular position of targets in the entire sector of the radar's view is provided by a movable mirror, for which purpose the data on the position of the bottom of the radar antenna in space are used in the mirror control system. The device provides simplification by reducing the number of antennas and simulators, but it is also difficult in terms of the implementation of several goals within the radar DND sector, since high-precision movement of the simulator antennas must be carried out by complex electromechanical drives. Mechanical movement also limits the ability to simulate the angular approach of targets less than the angular dimensions of the antennas with the aperture required for stable operation of the relay simulator and the angular velocity of moving targets, which reduces the reliability of the simulation of the necessary radar scene.

The aim of the invention is to simplify the device with increasing the reliability of the simulation.

The goal is realized by replacing the antennas of the simulators and their drives with an antenna with a moving phase center, consisting of N emitters located linearly at an equal distance less than the wavelength in the medium of electromagnetic wave propagation, of which m adjacent at the given time are connected in phase to the signal simulator through inconsistent dividers and inconsistent microwave keys located in the branch of the feeder line from the divider to the emitter and insertion into the circuit of the simulator of the register of rewriting the group position code by connected emitters under the control of the processor and providing a change in the position of the phase center of the virtual antenna, as well as reducing the number of simulators to one. To simulate several targets, the phase center of the radiation moves to several positions during signal processing in the radar, and the simulator has a digital delay line, the parameters of which, the Doppler frequency and delay, are switched synchronously with the movement of the phase center of the radiation.

To achieve this goal, a device for simulating a radar signal of a scene, containing an anechoic chamber, an antenna of a checked radar station, an echo signal simulator, fixed and movable flat mirrors installed in the near zone of a radar antenna, a moving mirror drive, while a fixed mirror reflects the plane wave of the signal radiated by the radar antenna towards the moving mirror, the direction of the wave reflected by the moving mirror through the drive of the moving mirror is regulated by the angle of inclination of the slide a mirror, a control system, an angle sensor that is mechanically connected to the moving mirror, the output of the angle sensor is connected to the input of the control system, the input of the drive of the moving mirror is connected to the output of the control system, an antenna with a moving phase center consisting of N emitters located linearly on equal distance less than λ in the medium of electromagnetic wave propagation, connected in series of the 1st inconsistent divider and the 1st segment of the feeder line with a length multiple of the wavelength in the feeder line, of the 2nd the agreed divider and the 2nd segment of the feeder line with a length that is a multiple of the wavelength in the feeder line and then, repeating up to the Nth inconsistent divider, the reactive load that shifts the phase of the signal when reflected is a multiple of 2π, to the input of which the third input-output of the last N- of the inconsistent divider, the second inputs and outputs of each of the N inconsistent dividers are connected to a series-connected length of the feeder line that is a multiple of half the wavelength in the feeder line, an inconsistent microwave key and emitter (each emits the spruce can be connected to the corresponding keys with feeder lines of equal length, in the further description of the device these elements are omitted due to obviousness), the input-output of the first divider is the input-output of the antenna with a moving phase center, and the signal simulator contains series-connected circulator, quadrature mixer , first bandpass filter, first analog-to-digital converter (ADC), random access memory (RAM), complex number multiplier, first digital-to-analog converter (DAC), tr the third bandpass filter, the quadrature modulator, the second output of the quadrature mixer through the second bandpass filter and the second ADC connected in series to the second RAM input, the second RAM output connected to the second input of the complex number multiplier, the second output of the complex number multiplier through the second DAC and the fourth bandpass connected in series the filter is connected to the second input of the quadrature modulator, the output of which is connected to the second input of the circulator, a local oscillator, the output of which is connected to the second input of the qua mixer and with the third input of the quadrature modulator, a direct digital synthesis generator, the first and second output of which are connected to the third and fourth inputs of the complex number multiplier, respectively, the first register, the output of which is connected to the third input of RAM, the second register, the output of which is connected to the input of the generator direct digital synthesis, and the inputs and outputs of the first and second registers are connected to the interface input-output of the echo signal simulator, the processor, the second input-output of which is connected to the input-output with control systems with the first input-output of an echo signal simulator, a digital register whose input-output is connected to the second input-output of the processor, and the outputs from the 1st to the Nth are connected to the inputs of the inconsistent microwave keys, respectively, from the 1st to N-th antenna with a moving phase center, the input-output of the antenna with a moving phase center is connected to the second input-output of the echo signal simulator, the input-output of the control system is connected to the second input-output of the processor, the first input-output of the processor is an interface link of the radio simulator insulating scene signal by which data is entered on the parameters of movement of simulated targets in range and angle data on the current angular position of the radar antenna.

The invention is illustrated by the further description and drawings of the simulator of the radar signal of the scene

Figure 1 shows the structure of the simulator of the radar signal of the scene.

Figure 2 shows the structure of the antenna with a moving phase center (APFC).

Figure 3 shows the structure of the simulator of the echo signal (IC).

In figure 1, the following notation:

1 - antenna of the checked radar (ARLS);

2 - fixed mirror;

3 - movable mirror;

4 - angle sensor (remote control);

5 - drive movable mirror (PPZ);

6 - control system (SU);

7 - antenna with a moving phase center (APFC);

8 - simulator of an echo signal (IES);

9 - register (REG);

10 - processor (PRC);

11 - anechoic chamber (BEC).

In figure 2, the following notation:

1) the k-th segment of the feeder line (PL _to );

2) the inconsistent divisor (ND _to );

3) to the emitter (And _to );

4) the inconsistent key (NK _to );

5) reactive load (LV).

In figure 3, the following notation:

1) circulator (C);

2) quadrature mixer (KS);

3) band-pass filter (PF);

4) analog converter (ADC);

5) random access memory (RAM);

6) complex multiplier (CMC);

7) digital-to-analog converter (DAC);

8) quadrature modulator (KM);

9) generator (G);

10) direct digital synthesis generator;

11) register (WG).

In Fig. 1, in the anechoic chamber 11, the antenna of the tested radar 1 is located at one end, and the antenna with the mobile phase center APFC 7 connected to the second microwave input-output of the echo signal simulator IS 8 between the antenna of the radar 1 and the antenna with the mobile phase center APFC 7, in the near zone of the radar antenna 1 there are fixed 2 and movable 3 flat mirrors, the fixed mirror 2 reflects the plane wave of the signal radiated by the radar antenna 1 towards the movable mirror 3, the angle of which is regulated by the drive of the moving mirror 5 , the angle sensor 4 is mechanically connected to the movable mirror 3, the output of the angle sensor 4 is connected to the input of the control system 6, the input of the drive of the moving mirror 5 is connected to the output of the control system 6, the input-output of which is connected to the second input-output of the processor 10, digital register 9 the input-output of which is connected to the second input-output of the processor 10, and the outputs from the 1st to the Nth are connected to the inputs, respectively, from the 1st to the Nth, of an antenna with a moving phase center APFC 7, the second input-output processor 10 is also connected to the first input-output of the simulator echo si signals, the first input-output of the processor 10 is the interface connection of the simulator of the radar signal of the scene, by which data are entered on the parameters of the movement of the simulated targets in range and angle, current data on the angular position of the radar antenna 1.

In figure 2, the antenna with a moving phase center 7 consists of N emitters And _k 7-k-3, where k from 1 to N, arranged linearly, at an equal distance less than K in the medium of electromagnetic wave propagation, connected in series with the 1st inconsistent divider ND ₁ 7-1 and the 1st segment of the feeder line FL ₁ 7-2 long, a multiple of the wavelength in the feeder line, the 2nd inconsistent divider ND ₂ 7-3 and the 2nd segment of the feeder line FL ₂ 7-4 long, multiple wavelengths in the feeder line, and then, repeating until the N-th uncoordinated divider ND _N 7- (2N-1), the third input-output last of the Nth mismatched divider ND _N 7- (2N-1) is connected to the reactive load of the PH 12, which shifts the signal phase by a factor of 2π, the second inputs and outputs of each of the N mismatched dividers ND _k from 7-1 to 7- (2N -1) th are connected to a series-connected segment of the feeder line with a length that is a multiple of half the wavelength in the PL feeder line _{N + k-1} 7-kl, an inconsistent microwave key HK _k 7-k-2, and emitter I _k 7-k-3 , the input-output of the first divider ND ₁ 7-1 is the input-output of the antenna with a moving phase center 7.

In Fig. 3, the echo signal simulator IS 8 contains a series-connected circulator C 8-1, a quadrature mixer KS 8-2, a first band-pass filter PF1 8-3, a first analog-to-digital converter ADC1 8-5, random access memory 8-7, complex numbers multiplier KUm 8-8, the first digital-to-analog converter TsAP1 8-10, the third bandpass filter PFZ 8-12, the quadrature modulator KM 8-13, the second output of the quadrature mixer KS 8-2, through the second bandpass filter PF2 8-4 connected in series and the second ADC2 8-6 is connected to the second input of RAM 8-7, in the second RAM output 8-7 is connected to the second input of the complex numbers multiplier KUm 8-8, the second output of the complex numbers multiplier KUm 8-8 through the second DAC2 8-9 and the fourth band-pass filter PF4 8-11 connected in series to the second input of the CM quadrature modulator 8-13, the output of which is connected to the second input of the circulator C 8-1, the local oscillator G 8-14, the output of which is connected to the second input of the quadrature mixer KS 8-2 and with the third input of the quadrature modulator KM 8-13, the generator of direct digital synthesis of GPCS 8-15, the first and second output of which combined with the third and fourth inputs of the complex number multiplier KUm 8-8, respectively, the first register RG1 8-16, the output of which is connected to the third input of RAM 8-7, the second register RG2 8-17, the output of which is connected to the input of the digital direct synthesis generator 8-15, and the inputs of the outputs of the first WG1 8-16 and the second WG2 of 8-17 registers are connected to the first interface input of the simulator of the echo signal of IC 8.

Control systems for mechanical drives are widely used in technology and are usually implemented on controllers.

Inconsistent keys, dividers, feeder lines of the antenna with a moving phase center can be implemented in the form of known microstrip, and (or) waveguide, cable elements.

As the quadrature mixer 8-2 and the quadrature modulator 8-13, microcircuits NMS 522 and NMS 709LC5 from Hittite Microwave Corp. can be used, respectively.

Register 9, first register 8-16 and second register 8-17, complex number multiplier 8-8 and direct digital synthesis generator 8-15 with communication interface with processor 10 can be implemented on the Virtex6 XCVLX130T programmable logic integrated circuit.

As a processor, any single-board computer can be used, combined on a multi-slot base of one of the interfaces, for example PCI-E IX, with specialized interface cards with registers and a control system.

The simulator of the radar signal of the scene depicted in figure 1, operates as follows. The tested radar through the antenna 1 emits signals in the working sector of the angles β ₀ ± Δϑ / 2, where Δϑ is the width of the radiation pattern of the radar antenna, while the plane wave of the antenna 1 radiated at an angle β (Fig. 1) is reflected from the plane mirror 2 in the side of the movable mirror 3, mounted at an angle β, in the direction α = φ-β. At angles α = α _i ± Δϑ / 2, where α _i is the direction angle to the phase center of the APFC relative to the common coordinate axis, the position of which is set by register code 9 and which determines the angular position of the i-th target, the radar signal through the APFC is transmitted to the echo simulator -signal 8, where it is delayed and shifted by the Doppler frequency in accordance with the range and speed entered, in the form of codes, into the simulator of the echo signal 8 from the input-output of the processor 10. Register code 9, which determines the angular position of the phase center of the AFCS and i th target is also set by processor 10. Echo, s generated by the simulator of the echo signal 8, through APFC 7 is radiated back, reflected by the moving 3 and fixed 2 mirrors in the direction of the antenna ARLS 1 as a simulated signal of the i-th target. By restructuring the angle of inclination of the movable mirror 3 to the angles φ _n , an imitation of the plurality of scene signals at angles β _in = 2φ _n -α _{i is} provided. The angle of inclination φ _{n of the} moving mirror and the position of the phase center of the AFFC α _{i are} controlled by the processor 10 taking into account the current direction of the radar antenna 1 coming from the angle sensor of the radar antenna β through the corresponding drive of the moving mirror 5 and register 9.

In the process of combat work, the processor 10 calculates the current position of each i-th target on the basis of the input coordinates, the initial coordinates and the motion parameters in range and angle, generates a signal that controls the drive 5, and register codes 9 δ _i , taking into account the current value of the angle β (direction of the radar antenna) coming from the sensor of the angular position of the radar antenna 1 to the third input-output of the processor 10 (the sensor of the angular position of the antenna and its connection with the third input-output of the processor 10 is not shown), the tilt angle φ of the movable mirrors 5 coming from the angle sensor 4, and the angular positions α _{i of the} targets. This eliminates the mismatch of the position of the targets at the angles of reception of the radar signal β _i , relative to the calculated, in the sector of angles β ± Δϑ / 2. The processor 10 synchronously, with the transfer of the register code 9 δ _i , (angular position of the i-th target), for a time shorter than the radar time constant, periodically transmits the range codes to ix targets and their Doppler frequency to the echo simulator. Thus, the signal received at the radar input simulates signals from the ix group of targets in the current sector of the angles of the radiation pattern of the radar containing information about the angular position, speed and range of each target.

The antenna with a moving phase center, shown in figure 2, operates as follows. The signal from the simulator of the echo signal 8 is fed to sequentially connected pairs of mismatched dividers 7- (2k-1) and feeder lines 7-2k length multiple of the wavelength in the feeder line. The first input-output of the first inconsistent divider is the input-output of the AFCS. From the second inputs and outputs of each 7- (2k-1) mismatched dividers, a part of the signal is fed sequentially to 7-k-l feeder lines that are a multiple of half the wavelength in the feeder line, 7-k-2 mismatched keys, and 7-k-3 emitters. If the inconsistent key 7-k-2 is opened by a logical signal coming from the output of the discharge of register 9, then the signal enters the emitter 7-k-3 and is emitted. The processor 10 simultaneously opens m adjacent mismatched keys. Since the signals to the emitters arrive with the same phase, m adjacent emitters form an antenna with the required aperture, which is selected from the condition for providing the antenna gain mΔ necessary for stable operation of the simulator, where Δ is the distance between the emitters. In those branches, from the second inputs of the inconsistent dividers 7- (2k-1), where the inconsistent key 7-k-2 is closed by a logic signal coming from the output of the register register 9, the signal received at the first input of the inconsistent divider 7- (2k-1) completely arrives at its third input-output, since the length of the feeder line 7-kl is a multiple of half the wavelength in the feeder line. The last non-coordinated 7- (2N-1) divider from the APFC input-output is connected to the reactive load by the third input-output, which shifts the phase of the signal by a factor of 2π, and therefore the signal is completely reflected and in phase is transmitted to the emitters with public keys.

The simulator of the echo signal 8 shown in figure 3, operates as follows. The signal received from the antenna of the radar 1 U (t) received by the antenna with the moving phase center 7 is fed through the circulator 8-1 to the quadrature mixer 8-2, to the second input of which the local oscillator signal 8-14. The first quadrature output signal U _{C of the} quadrature mixer 8-2 through a series-connected first band-pass filter 8-3 and the first analog-to-digital converter (ADC) 8-5 is supplied to the first input of random access memory (RAM) 8-7. The second quadrature signal U _S from the output of the quadrature mixer 8-2 through a similar second band-pass filter 8-4 and the second ADC 8-6 is fed to the second input of RAM 8-7. Reading the recorded signal from the first RAM 8-7 is performed at the address generated by the first register 8-16, and begins with a delay equal to the delay of the reflected signal from the i-th target τ _i , determined by the source code δ _i1 , entered into the first register 8-16 processor 10.

The quadrature components U _C and U _S are respectively supplied to the first and second input of the complex number multiplier 8-8, the third and fourth inputs of which receive the quadrature signal components of the direct digital synthesis generator 8-15 with the Doppler frequency of the reflected signal from the i-th target f _di which is given by the second code register 8-17 δ _i2, introduced processor 10. The quadrature signal output from the complex numbers multiplier 8-8 are converted to analog form by digital to analog converters 8-9 and 8-10 and further smoothed analogous bubbled bandpass filters 8-11 and 8-12. The signal from the output of the bandpass filters 8-11 and 8-12 at an intermediate frequency is fed to the first and second inputs of the quadrature modulator 8-13, where with the help of a heterodyne signal supplied to its third input, it is transferred to the carrier frequency. The output signal of the quadrature modulator 8-13 through the circulator 8-1 enters the AFCS and is emitted.

The technical advantage of the proposed simulator of the radar signal of the scene over the prototype is the ability to simulate many moving targets in range and angle, without the need to use complex mechanical drives to move the antennas of simulators, use one simulator instead of several, realize a high speed of angular movement of targets, and also simultaneously implement the required discrete angular movement of the target (mutual placement of two goals) and necessary for a stable and affordable correct operation of the relay transmission path coefficient simulator radar antenna - input simulator.

Using the information presented in the application materials, the radar target simulator can be made according to the existing technology known in the radio industry on the basis of well-known components and used in radar checks during bench tests.

LITERATURE

1. US patent 5892479 G01S 7/40 from 04/06/99 "Electromagnetic target generator"

2. US patent 4521780 G01S 7/40 from 04.06.85 "Target simulation system"

3. US patent 4660041 G01S 7/40 from 21.4.87 "Radar scene simulator"

4. Bokov A.S., Vazhenin V.G., Vorobev L.P., Dyadkov N.A., Nesterov Yu.G., Sirotin A.I., Mukhin V.V. Determination of parameters of a simulator of a reflected radar signal based on a device with radio frequency memory. Proceedings of the first All-Russian scientific and technical conference. Kamensk-Uralsky, 2004

5. Patent of Russia 2403587 G01S 7/40 dated 12/26/2008. "Scene radar simulator."

Claims (2)

1. The device of the simulator of the radar signal of the scene contains an anechoic chamber, an antenna of the radar station under test, an echo signal simulator, fixed and moving flat mirrors installed in the near zone of the radar antenna, a moving mirror drive, while the fixed mirror reflects the plane wave of the signal, radiated by the radar antenna, towards the moving mirror, the direction of the wave reflected by the moving mirror through the drive of the moving mirror is controlled by the angle of inclination of the moving mirror, the control system , an angle sensor that is mechanically connected to the movable mirror, the output of the angle sensor is connected to the input of the control system, the input of the drive of the moving mirror is connected to the output of the control system, characterized in that an antenna with a moving phase center consisting of N emitters arranged linearly on equal distance less than λ in the medium of electromagnetic wave propagation, connected in series of the 1st inconsistent divider and the 1st segment of the feeder line with a length multiple of the wavelength in the feeder line, of the 2nd inconsistent of the second divider and the 2nd segment of the feeder line with a length multiple of the wavelength in the feeder line, and then, repeating up to the Nth inconsistent divider, the reactive load, which shifts the phase of the signal when reflected, is a multiple of 2π, to the input of which the third input-output of the last N -th inconsistent divider, the second inputs-outputs of each of the N inconsistent dividers are connected to a series-connected length of the feeder line that is a multiple of half the wavelength in the feeder line, the inconsistent microwave key and emitter, the input-output of the first delhi The spruce is the input-output of an antenna with a moving phase center, and the signal simulator contains a series-connected circulator, a quadrature mixer, a first bandpass filter, a first analog-to-digital converter (ADC), random access memory (RAM), a complex number multiplier, and a first digital-to-analog a converter (DAC), a third bandpass filter, a quadrature modulator, a second output of the quadrature mixer through a second bandpass filter and a second ADC connected in series to the second RAM input, the second RAM output is connected to the second input of the complex number multiplier, the second output of the complex number multiplier is connected through the second DAC and the fourth bandpass filter in series to the second input of the quadrature modulator, the output of which is connected to the second input of the circulator, the local oscillator output of which is connected to the second input of the quadrature mixer and with the third input of the quadrature modulator, a direct digital synthesis generator, the first and second output of which are connected to the third and fourth inputs of the multiplier plex numbers, respectively, the first register, the output of which is connected to the third RAM input, the second register, the output of which is connected to the input of the direct digital synthesis generator, and the inputs and outputs of the first and second registers are connected to the interface input-output of the echo signal simulator, processor, the second input the output of which is connected to the input-output of the control system and to the first input-output of the echo signal simulator, a digital register, the input-output of which is connected to the second input-output of the processor, and the outputs from the 1st to the Nth are connected to the inputs inconsistent microwave keys, respectively, from the 1st to the Nth antennas with a moving phase center, the input-output of the antenna with a moving phase center is connected to the second input-output of the echo signal simulator, the input-output of the control system is connected to the second input-output of the processor, the first input - the processor output is an interface connection of a simulator of a radar signal of a scene, according to which data are entered on the parameters of the movement of the simulated targets in range and angle, current data on the angular position of the radar antenna. 2. The device for simulating a radar signal of a scene according to claim 1, characterized in that the emitters are located at an angular distance, relative to the radar, equal to the width of the radiation pattern of the radar antenna, and each emitter is connected to a corresponding mismatched microwave key by a feeder line of arbitrary length.

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