RU8485U1 - SELF-GUIDED ANTI-RADAR ROCKETS SELECTION DEVICE ON THE BACKGROUND OF OTHER AIR TARGETS, IMPLEMENTING A TWO-POLARIZATION METHOD FOR SINGING ONE ANTENNA - Google Patents

Abstract

A device for selecting homing anti-radar missiles against other air targets, implementing the bipolar method of sensing a single antenna, containing an antenna, a pulse modulator, an output amplifier connected to its output with its second input, an antenna switch connected to its output, an generator connected with its output the first input is the first mixer connected to its second input by its local oscillator output, as well as the second mixer and amplifier are connected in series frequency, characterized in that the device also includes a synchronizer, trigger, control voltage driver, ferrite phase shifter, pulse counter, delay line, identification unit, high-frequency amplifier, divider, first and second reset adders, switch and amplitude detector, moreover, the synchronizer output is connected to the input of the delay line, the input of the pulse counter and the input of the trigger, the output of which is connected to the second input of the switch and the input of the driver of the control voltage which is connected to the control input of the ferrite phase shifter, the first input-output of which is connected to the input-output of the antenna, and the second input-output is connected to the input-output of the antenna switch, the output of which is connected to the input of the high-frequency amplifier, the output of which is connected to the first input of the second mixer, the second input of which is connected to the output of the local oscillator, while the output of the intermediate frequency amplifier is connected to the input of the amplitude detector, the output of which is connected to the first input of the switch, the first output of which is

Description

DEVICE PRO

PMET FOR STRAIGHT

A new model for radar devices and

It can be used to isolate self-guided anti-radar missiles (PRR) with a linearly polarized antenna in their head against other airborne targets for various purposes.

A device for the selection and recognition of radar targets, containing sequentially connected generator, 1st frequency multiplier, power amplifier, antenna switch and antenna, the output of the generator is also connected to the input of the Eth frequency multiplier and the 1st input of the pelvic detector, the output of which is connected with the indicator input, and the Eth input - with the output of the intermediate frequency amplifier, the input of which is connected to the output of the mixer, 1st. and the 2nd inputs of which are connected respectively with the output of the second frequency multiplier and the antenna switch, and the Eth input of the power amplifier is connected to the output of the pulse modulator 11.

This device provides the detection of moving artificial targets against the underlying surface, and Taime recognizes them based on Doppler affect.However, it cannot provide detection and recognition of stationary targets against the underlying surface and, moreover, cannot distinguish between an ordinary air target and PRR.

It is known that a radar device for selection of target recognition gj, consisting of an indicator and a transceiver containing a generator, a pulse modulator (IM), a power amplifier (AM), an antenna switch (AP), an antenna, the 1st and Eth mixers, a local oscillator, is known intermediate frequency amplifier (UHF) and phase detector (PD). In this case, the generator is connected by its output to the 1st input of the 1st mixer and the 1st input of the PA, the 2nd input of which is connected to the output of the IM, and the output is connected to the antenna through the AP, the output of which is connected to the 1st input of E- mixer, the 2nd input of which is connected to the output of the 1st mixer, and the output is connected to the input of the amplifier, the output of which is connected to the 2nd input of Щ, the output of which is connected to the indicator, and the 1st input - with the output of the local oscillator and 2nd entrance of the 1st

ANTENNA

IPC G 01 S 13/02

mixer.

This device does not provide high accuracy of recognition of airborne targets, since it cannot recognize stationary or moving targets against local objects and meteorological conditions, as well as targets having identical radial components of the velocity vector. This device is not able to select common targets and PRR.

The purpose (task) of the utility model is to provide the ability to select self-guided missiles against the background of conventional aerodynamic aircraft.

that in the composition of the famous

EE devices additionally introduce a synchronizer, a trigger, a control voltage driver (FCF), a delay line (LV), a pulse counter, a ferrite phase shifter (FFV), an identification unit (EI) 5 high-frequency amplifier (UBF), divider, 1st and S th adders with reset, switch and amplitude detector (HELL). In this case, the synchronizer output is connected to the input of the delay line, the input of the pulse counter and the input of the trigger, the output of which is connected to the second input of the switch and the input of the driver of the control voltage, the output of which is connected to the control input of the ferrite phase shifter, the first input-output of which is connected to the input-output of the antenna and the second input-output is connected to the input-output of the antenna switch, the output of which is connected to the input of a high frequency amplifier, the output of which is connected to the first input of the second mixer I, whose second input is connected to the output of the local oscillator, while the output of the intermediate frequency amplifier is connected to the input of the amplitude detector, the output of which is connected to the first input of the switch, the first output of which is connected to the first input of the first adder with a reset, the second input of which is connected to the output of the pulse counter and the second input of the second adder with a reset, the first input of which is connected to the second output of the switch, and the output to the second input of the divider, the first input of the switch is connected to the output of the first total and, while the output - to the input identification unit. The input of the pulse modulator is connected to the output of the delay line, and the output of the first mixer is connected to the first input of the power amplifier.

This scheme allows the proposed device to select PRR by analyzing the levels of the summed signals received on two orthogonal linear polarizations.

yastructural scheme of the proposed

a group of hitchhikers of self-guided missile defense on the background of other air targets that implements the bipolar method of sounding with one antenna,

The device consists of synchronizer 1, trigger 2, FUN 3, -JB 4j pulse counter 5, antenna 6, FFV 7, IM 8, Zh 9, AL 10, BI 11, generator IE, 1st mixer 13, UHF 14, divider 15, the 1st adder with reset 16, the local oscillator 17, the E-mixer 18, the 2nd adder with reset 19, the switch SO, HELL SI and UPCH 2S. The synchronizer 1 is connected by its output to the input of the trigger S, pulse counter 5 and LZ 4. The output of the trigger S is connected to the input of the FCF 3 and SM is the input of the switch 0, the first input of which is connected to the output of the AD 21, the input of which is connected to the output of the SSh SS, the input of which is connected to the S-ro output of the mixer 18, the first input of which is connected to the output of the UHF 14, connected by its input to the output of the AP 10. Lastly, the AP 10 is connected by its input to the output of U 9, and the input-output - oo SM input-output B 7, the first input-output of which is connected to the input-output of the antenna 6, and the control input to the output of the FCF 3, V the oscillator 17 is connected to the S-th input of the 18th mixer 18 and the SM input of the 1st mixer 13. The 1st input of which is connected to the output of the generator 12, and the output - with the 1st input of the UM 9, the 2nd input of which is connected to the output of IM 8, the input of which is connected to the output of JB 4 The output of the pulse counter 5 is connected to the 2 inputs of the 1st and S-ro adders oo by resetting 16 and 19, the outputs of which are connected respectively to the 1st and Sth inputs of the divider 15. the output of which is connected to the input of the BI C, while the 1st and Sth outputs of the switch 20 are connected respectively with the 1st inputs of blocks 16 and 19.

The device is working. way.

The local oscillator 17 generates high-frequency oscillations at the carrier frequency IQ, which are fed to the 1st input of the 2nd mixer 18 and the 2nd input of the 1st mixer 13. The signal of the generator 12 with an intermediate frequency Fnp is received at the 1st input of the 1st mixer 13 which is mixed with the local oscillator signal 17, providing a continuous signal with a frequency at the output of the 1st mixer 13 This signal is fed to the 1st input of the UM 9J to the 2nd input of which a modulating signal from the output of the IM 8 is received it turns out a pulsed signal filled with oscillations at the frequency fo + Fnc, which the output from the PA 9 is fed to the input of the AP 10, the input-output of which is connected to the 2nd input-output of the FFV 7. The transmission line between the AP 10 and

7 is an excerpt from a rectangular waveguide in which the conditions for the propagation of a wave of the type NuSignal are satisfied at a frequency E in the form of an electromagnetic wave (EMW) of the type HIO, it extends the FFV. made in the form of a segment of a circular waveguide filled with Ferrite (a chemical compound of jelly oxide Reoid with metal oxide such as nickel, manganese, magnesium) or having inside a sherritic rod C3 s, 510, Fig. KHP 1.38) with a longitudinal magnetization field, created, for example , a solenoid. Such devices (referred to in the technical literature as gyrators 43) are already widely used in the antenna technology of radar airborne aircraft systems and aircraft radar systems. Their principle of operation is quite widely announced in training specialties 3; 5 63 In the gyrator 7, the Nu wave is converted into a wave of the main type of a circular waveguide Нц, which irradiates the aperture of the antenna 6, after reflection from which it is radiated into space. According to classification 6 FFV 7, to fulfill its functional purpose, there should be a FFV with a closed magnetic circuit, through, with a longitudinal magnetization field. created by the electromagnetic system. The toroidal phase shifter shown in C5, p.178, Fig.6.24, only implemented in a circular waveguide, can also serve as an analogue. The work of the FFV is based on the Faraday effect. The length and size of the ferrite insert, as well as the magnitude of the bias current, can be used to control the phase shift undergoing EMF during the passage of the FFV. The indicated parameters must be such that the vertically polarized wave emerging from the rectangular waveguide, in the absence of a bias current, does not change its polarization, and in the presence of bias current pulses, it changes its polarization by 90. In this case, the gyrator 7, being the antenna irradiator, will allow one aperture with the same phase center signals at two orthogonal polarizations. To control the operation of FFV 7, FUN 3 is used, where control current pulses are generated at the moments when rectangular pulses 3 are fed to the input of block 3 from the trigger 2 output. Short current pulse generators are widely known in radio engineering and do not need to be described.

Synchronizer 1 serves to control the operation of IM 8 through JB 4 to control the operation of the FFV 7 through trigger 2 and FCU 3, to control the switch 20 through trigger 2 and to control the ommators with reset 16 and 19 through the pulse counter 5. The essence of the control is as follows. The pulses with the pulse repetition rate are synchronized to the input of trigger 2, which generates rectangular pulses to start the FCF 3. The leading edge of these wide pulses corresponds to the moment of arrival of each odd short synchronization pulse (from the output of block 1), and the trailing edge to the moment of arrival of each even sync pulse . Thus, the output pulse of trigger 2 takes place in each odd repetition period Tk - Accordingly, in each even period of Tn, there is no pulse at the output of block 2. This output pulse of trigger 2, upon arrival at the input of FCF 3, starts it for the duration of its duration, and FCF 3 generates a control signal for FFV 7, which is a current pulse, in the presence of which a magnetization field is formed around the ferrite in the windings of the solenoid (or other device for creating an SMF). Then the signal passing through the FFV 7 changes its polarization by 90 °. As long as the bias field control signal is present throughout the entire Ti period, the signal reflected from the target (or PRP) will pass through the gyrator 7 to the input-output of the AP 10 without hindrance. In the next period of repeating Ti, there will be no signal at the output of trigger 2. Responsibly, the control current pulse in the FCF 3 will not be generated. As a result, when the gyrator 7 passes, the VHF signal will not undergo a phase shift and its polarization will remain vertical. With the same polarization, the microwave signal reflected from the object will pass in the opposite direction to AL 10. It is clear that the described processes will alternate from period to period.

Delay line 4 delays the clock pulse by the value ta- About output FROM 4, the delayed pulse is fed to input IM 8, which forms a rectangular modulation pulse (its duration determines the duration of the probing signal%). This pulse arrives at the 2nd input of UM 9, which fills it with a high-frequency signal (fo + Fnp) and amplifies it in terms of magnitude to a value that ensures the return of the signal reflected from the Samsung remote object with an amplitude exceeding the sensitivity of the radar receiver. A delay of a clock by a value of to in LZ 4 is necessary so that by the time the microwave signal arrives at V 7, the control current pulse can form an EMF that provides the necessary phase shift. The value of tg should correspond to the duration of the sync pulse (for example, 0.5 μs), since this time is commensurate with the time of over-switching of the toroidal FFV Co, oL78. From the spoken word of Teletu; that from period to period, the polarization of the microwave antenna received by antenna 6 will change from horizontal to vertical and vice versa. Each odd vanding pulse emitted in the direction of the selectable target will have a horizontal axis, and each even one will have vertical polarization

The level of the signal reflected from the aerodynamic target (ADC) in the quasi-optical region of reflection of radio waves is invariant to the type of polarization of the vanding signal. The difference between the reflections from the ADC at the horizontal and vertical polarizations can only be caused by the reflection from the antenna of the ADC airborne radar if it has one of the indicated polarizations, and even then if the airborne radar antenna constantly monitors the radiation source, which in itself It is unlikely, since airborne radars do not pick up in the passive direction finding mode of ground-based radars.

As for the PRR, its homing head (GOS) constantly monitors the radiation source, that is, its antenna is always directed towards the emitting radar. If the polarization of the radar vanding signal coincides with the polarization of the seeker antenna, then the entire signal received by the mirror of the seeker antenna will be focused on the seeker collinear in polarization of the seeker, and, practically without reflection, will be absorbed by the matched input of the PRR receiver. If the polarization of the probe signal is orthogonal to the polarization of the GSR PRR antenna, then all the energy received by the mirror of the GSN antenna will focus on the irradiator orthogonal in polarization, and, reflected from it, will be completely reflected by the mirror of the GSN antenna towards the radiating radar. This fact is put in the United Nations the operation of the proposed device.

The signals reflected by the selectable target are received by the antenna 6, and then through the FFV 7 they are fed to the input-output of the AI 10, passing through which they are fed to the input of the UHF 14. where they are amplified at a high frequency. From the output of UHF 14, the received signals are fed to the 1st input of the 2nd mixer 18, to the 2nd input of which a continuous signal is supplied at a frequency fo from the output of the local oscillator 17, Frequency conversion leads to the output of the 2nd mixer 18 a signal is allocated at a frequency of Fnp, which is fed to the input of the amplifier 22, where its main gain is produced. Next, the signal from the output of the UCH 22 is fed to the input of the AD 21, where its envelope is highlighted, which is fed to the 1st input of the switch 20, the 2nd (control) input of which is connected to the output of trigger 2,

The output pulses of the trigger control the commutation frequency so that SO1 that it directs the reflected signals of odd repetition periods (in the presence of a pulse from the trigger) to its first output, the signals of even periods to its second output, and these outputs send signals accordingly to The 1st inputs of the 1st and S-ro adders with a reset of 16 and 19. As a result of this, the output of the 1st adder 16 produces a signal equal to the sum of the amplitudes of the signals received at the horizontal polarization, and a signal is generated at the output of the 2nd adder 19 equal to the sum of the amplitudes of the signals, dull x on the vertical polarization, and the outputs of blocks 16 and 19, the signals are supplied respectively to the 1st and Eth inputs of the divider 15. The output signal of this divider is proportional to the quotient of the amplitudes of the signals received at its 1st and 2nd inputs. If the input signals belong to the ADC, that is, their level is invariant to the type of sensing polarization, then the division result will be closer to unity, the greater the number of reflected pulses used for summation. The number N of integrable pulses is limited by the permissible time of one cycle of selling Tc and is equal to (2Tk), If the reflected signal belongs to the PRR, then, depending on the type of polarization used in the PRR antenna, the division result (output signal of block 15) will either be close to zero or have a very large value.

The output signal of the divider 15 is fed to the input of the BI 11, where it is compared with a set interval (for example, from 0.9 to 1.1) of acceptable values. When the signal amplitude falls within this interval, a decision is made that the target being followed is an ordinary aircraft. Otherwise, a decision is made that the target under study is a PRR. The results of this two-alternative selection are displayed for their visual perception on the light indication panel (lamp or LED with the corresponding inscription) BI 11.

The clock pulses are also fed to the input of the pulse counter 5. This block is designed to generate reset pulses of the adders with a reset of 16 and 19. Since non-abundant types of PRRs in flight can rotate at an angular speed reaching several revolutions per second, the accumulation time of the reflected signals should be several times less than the possible turn time of the GOS PRR on ANGLE 90 This is due to the fact. that when processing signals reflected from the PRR, which rotates around the axis of symmetry by 90, the levels of accumulated signals at orthogonal polarizations can be equal, and the proposed device will make the wrong decision. At ANGULAR speed r / sec, the turn time of the GOS by 90 will be 0.25 sec. So pulse counter 5 should generate a reset signal

rrrii. tttlrDDTR TTf-. bf yf-OeP P p.i K ITTP-t P, with IT-.tJ, Ch. with R. YPPKP P, -s -

In the first half of the polarization, the total signal at one of the polarizations was significantly larger than the total signal at the other polarization. Then the number of synchronization pulses, upon arrival of which the counter 5 should generate a reset signal, is equal to l / Tx.i. for μs M U5l / Sxin: 5nn, in this particular example, the selection cycle is 0.1 MCS and it resumes every 500 repetition periods. In this case, the number of pulses accumulated in the adders 16 and 19 is equal to 50. In this way, the device is insured against making the wrong decision if the enemy uses a PRR rotating in flight. Most of the old-type self-guided missile launchers (the appearance and parameters of which have become publicly available) have wings or stabilizers that prevent rotation of the HSC and the missile launcher itself in flight. Known PRR, made in general in the form of an airplane with large horizontal wings. In this case, the time of one selection cycle will be limited only by the standards of combat work, that is, the maximum time allotted for the adoption of one or another decision, guaranteeing the successful completion of the combat task in the fight against the enemy air attack means.

As can be seen from the description of the device, it is highly likely to provide for the selection of ordinary AIR objects and targets, homing on radar radiation and having passive radar receivers with linear polarization. This selection device can be implemented in any anti-aircraft missile system, since it is built according to the standard scheme with one aperture antenna and a pulsed sounding method of airborne detachment. .Authors:: Alnika of the Academy of Sciences, Professor Mitrofanov D.G., Gladky A.Yu. Rischenkov V.V. Prokhorkin A.G. Ljq, .IIO.Y 4i nTi .t Ljq ,. iid-v -iil- i-i -d -; - - FORMULARITIES

1. Aviation Radar WatroiotEa / Iod Ed.P.I.Dudnika. M.: VVM named after N.E. Zhukovsky, 1986, 0.200, Fig. ULE (analogue).

2. Aviation Radar Surveillance / Edited by P.I. Dudnik. M. I VVIA named after N.E. Zhukovoky, 1986, 0.201, Rio.7LZ (prototype).

3.Drabkin A.L. et al. Antenna-Feeder Watches. Ed. 2nd, add. and recycling. - M .: Oov. radio. 1974 536 s.

4. Polytechnical dictionary. Ed. 2nd. / Ed. A.Yu. Ishlinokogo, Moscow: Ooviet Encyclopedia. 1980s p. 122. (total 656 s.)

5. Oazonov D.M. Antennas and VHF devices. Textbook for radio engineering. specialist. Universities.- M.: Higher School. 1988. with SL76-178 (total 432 s.)

6. Antennas and VHF devices. Designing phased array antennas. Textbook for universities. / Ed. DI. Voskresensky. -Mg Radio and communication. 1994.p.329-347 (total 592 about.)

 Id / cdj

Claims (1)

A device for selecting homing anti-radar missiles against other air targets, implementing the bipolar method of sensing a single antenna, containing an antenna, a pulse modulator, an output amplifier connected to its output with its second input, an antenna switch connected to its output, an generator connected with its output the first input is the first mixer connected to its second input by its local oscillator output, as well as the second mixer and amplifier are connected in series frequency, characterized in that the device also includes a synchronizer, trigger, control voltage driver, ferrite phase shifter, pulse counter, delay line, identification unit, high-frequency amplifier, divider, first and second reset adders, switch and amplitude detector, moreover, the synchronizer output is connected to the input of the delay line, the input of the pulse counter and the input of the trigger, the output of which is connected to the second input of the switch and the input of the driver of the control voltage which is connected to the control input of the ferrite phase shifter, the first input-output of which is connected to the input-output of the antenna, and the second input-output is connected to the input-output of the antenna switch, the output of which is connected to the input of the high-frequency amplifier, the output of which is connected to the first input of the second mixer, the second input of which is connected to the output of the local oscillator, while the output of the intermediate frequency amplifier is connected to the input of the amplitude detector, the output of which is connected to the first input of the switch, the first output of which is Din with the first input of the first adder with a reset, the second input of which is connected to the output of the pulse counter and the second input of the second adder with a reset, the first input of which is connected to the second output of the switch, and the output - with the second input of the divider, the first input of which is connected to the output of the first adder and the output - with the second input of the divider, the first input of which is connected to the output of the first adder, and the output - to the input of the identification unit, the input of the pulse modulator is connected to the output of the delay line, and the output of the first mixer is connected to the first input of the power amplifier.