RU2568107C1 - Coherent-pulse radar - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: invention is meant for individual protection of radar systems for detecting aerial targets and controlling ground-to-air weapons in conditions where the enemy is using Precision Location Strike System (PLSS) reconnaissance-strike systems with a differential-range finding electronic reconnaissance system and a guided weapon command system based on reconnaissance data. The technical result is low probability of the coherent-pulse radar being struck.

EFFECT: radar station comprises a driving generator, a synchroniser, a pulse modulator, two delay lines, three power amplifiers, a transceiving antenna device, a receiving device, two pulse formers, two transmitting antenna devices, a sawtooth voltage generator, connected to each other in a certain manner.

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Description

The invention relates to the field of radar technology and is intended for the individual protection of radar systems for detecting air targets and controlling weapons of the ground-to-air class under conditions of enemy use of reconnaissance and strike systems (ASM) of the PLSS type (Precision Location Strike System, hereinafter referred to as PLSS) with differential rangefinder radio intelligence system (RTR) and command guidance system for guided weapons according to intelligence.

Known coherent-pulse radar station (see RF patent No. 2058565, GO1S 13/52, 1996), containing a transceiver antenna, receiver, synchronizer, pulse generator, transmitter, N chains, each of which consists of a series-connected key, Doppler filter and accumulation unit, indicator, altimeter, gating mode selector. The pulse comb generator comprises a series-connected controlled delay element of N-blocking generators. The synchronizer contains a switch, pulse generators, a gate-pulse generator. The gating selector contains a meander generator, a delay control. The delay controller contains an adder, an element "And", a constant voltage source.

The main disadvantage of such a radar is the low degree of protection against PLL-type handhelds, which is caused by the possibility of radio-technical reconnaissance of their signals emitted from the side lobes of the antenna pattern from spatially spaced points in a differential-ranging manner, followed by high-precision location of the radar from the point of intersection of hyperbolic target position lines constructed for the RTR system of three reconnaissance aircraft (CP) (see Atinov V.V. Development of high-precision weapons and perspectives in the USA you create reconnaissance-strike systems, Military Thought, No. 4, 1983, p.65).

Also known is a coherent-pulsed radar station (see RF patent No. 27713, GO1S 13/52, 2003) containing a serially connected transmitter, an antenna switch and a directional coupler, to the output of the main arm of which a transceiver antenna is connected, and a high-power amplifier is connected in series frequency, the input of which is connected to the third arm of the antenna switch, the first mixer, the first intermediate frequency filter and the first intermediate frequency amplifier, the output of which is connected to the first input a signal processing unit house, a second mixer connected in series to the output of the auxiliary arm of the directional coupler, a second intermediate-frequency filter and a second intermediate-frequency amplifier, the output of which is connected to the second input of the signal processing unit, the first local oscillator connected respectively to the heterodyne inputs of the first and second mixers, and an indicator device connected to the output of the signal processing unit. The signal processing unit contains two quadrature phase detectors, four analog-to-digital converters, a reference generator, a synchronizer, a phase-matching unit, a memory unit, a spectral analysis unit, a threshold processing unit, an extreme processing unit and a target marking unit, while the inputs of the first and the second quadrature phase detectors are respectively the first and second inputs of the signal processing unit, and their reference inputs are connected to the output of the reference generator, the sine outputs x and cosine channels of the first and second quadrature phase detectors are connected respectively to the inputs of the first, second, third and fourth analog-to-digital converters, the clock inputs of which are connected respectively to the outputs of the synchronizer, the outputs of the analog-to-digital converters are connected respectively to the phase input input blocks, block output target marking is the output of the signal processing unit, and the second input of the target marking unit is the input of the receiver azimuth sensor signal transmitting antenna.

The essence of the inventions set forth in these patents is to improve the quality of reception of the signal reflected from the target due to new technical solutions during its processing in the radar. However, the coherent-pulse radar systems described in these patents are also not protected from detection of PLS-type arms by the differential-ranging method along the side lobes of the bottom of the bottom.

The closest in purpose and technical essence to the proposed invention is a coherent pulse radar (see RF patent No. 2454678, GO1S 7/36, 2012), containing a serially connected master oscillator, synchronizer, pulse modulator and serially connected first power amplifier, to the second the input of which is connected to the output of the master oscillator, the transceiver antenna device and the receiver, the second input of which is connected to the output of the master oscillator, and the third to the synchronizer output, the first line the latches connected in series to the first pulse shaper, the second power amplifier and the first transmitting antenna device and the second delay line connected in series to the input of which the input of the first pulse shaper, the second pulse shaper, the third power amplifier, the output of the master oscillator is connected to the second input and the second a transmitting antenna device, wherein the delay time of the second delay lines τ _lz2 relative to the time delay of the first delay lines τ selects _lz1 I'm from the condition

Δτ = (τ _ls1 -τ _lz2 ) ≥τ ₀ ,

where τ ₀ is the pulse duration of the main signal, with τ ₀ ≈τ _∂ , where τ _∂ is the pulse duration of the additional signals, and the power amplification factors of the second and third power amplifiers K _у must satisfy the conditions

,

,

where K _y1 is the power gain of the first power amplifier, G ₁ is the gain of the transceiver antenna device, G is the gain of the first and second antenna devices.

This radar has increased secrecy from RTR means conducting reconnaissance along the side lobes of the radar antenna pattern due to the possibility of generating a series of additional pulses that carry false information about the location of the radar, making it difficult to select true pulses (tags) among the false difference-range RTR systems.

The disadvantage of this radar is the fundamental possibility of determining the location of the radar as a stationary object, due to the pairwise analysis of the totality of the generated additional pulses.

The objective of the invention is to reduce the likelihood of hitting a coherent-pulse radar with a guided weapon of a reconnaissance-strike complex of the PLSS type, designed to destroy stationary objects, up to the exclusion of a radar from the number of targets of the RUK due to the formation of additional signals that ensure the creation of periodically increasing errors in time to determine it location and simulating its movement.

The technical result is achieved due to the fact that in the known coherent-pulse radar containing serially connected master oscillator, synchronizer, pulse modulator, the first delay line, the first power amplifier, the second input of which is connected to the output of the master oscillator, transceiver antenna and receiver a device, the second input of which is connected to the output of the master oscillator, and the third to the output of the synchronizer, the first pulse shaper, the second amplifier, connected in series sensitivity, the first transmitting antenna device and the second delay line connected in series to the first input of which the output of the pulse modulator, the second pulse shaper, the third power amplifier, to the second input of which the output of the master oscillator and the second transmitting antenna device are connected, and the power gains of the second and the third power amplifiers K _y satisfy the condition

,

,

where K _у1 is the power gain of the first power amplifier, G ₁ is the gain of the transceiver antenna device, G is the gain of the first and second antenna devices, a sawtooth voltage generator connected to the second input of the second delay line, which is controlled, is introduced, the delay time of the first delay line τ _lz1 and the maximum delay time of the second controlled delay line τ _{ulz2max is} chosen from the conditions

τ _ls1 ≤τ _∂1 -τ ₀ ,

τ _ulz2max ≤τ _lz1 ,

where τ _∂1 , τ ₀ are the pulse durations of the additional and main signals, respectively, and the first and second pulse shapers are made in the form of waiting multivibrators.

The physical nature and the distinctive feature of the invention is that the introduction of a sawtooth voltage generator into the radar that controls the delay time of the second delay line by generating additional signals periodically changing in time leads to the creation of continuously changing systematic errors in determining its location and, therefore, to reduce the likelihood damage to a coherent-pulse radar, up to its exclusion from the number of objects of destruction of the RUK type PLSS, operating only in a hospital ary objects.

The analysis of the prior art made it possible to establish that analogues that are characterized by a combination of features identical to all the features of the claimed technical solution are absent, which indicates the compliance of the claimed invention with the condition of patentability “novelty”.

The search results for known solutions in this and related fields of technology in order to identify signs that match the distinctive features of the claimed device showed that they do not follow explicitly from the prior art and the popularity of the distinctive features on the claimed technical result is not confirmed (reducing the likelihood of damage to the coherent pulse radar guided weapons RUK type PLSS). Therefore, the claimed invention meets the condition of patentability "inventive step".

The claimed technical solution is industrially applicable, since it can be used in the military-industrial complex, and standard equipment and materials can be used for its implementation.

Figure 1 shows the structural diagram of a coherent pulse radar, figure 2 is a structural diagram of a controlled N-tap delay line with a delay time control device, figure 3 - voltage diagrams explaining the operation of the radar, figure 4 - geometry location Radar relative to the reconnaissance aircraft RUK.

Coherent-pulse radar (Fig. 1) contains serially connected master oscillator 1, synchronizer 2, pulse modulator 3, first delay line 4.1, first power amplifier 5.1, the second input of which is connected to master oscillator 1, transmitter-receiver antenna 6 and receiver device 7, the second input of which is connected to the master oscillator 1, and the third to the output of the synchronizer 2, connected to the second output of the pulse modulator 3 connected in series to the first standby multivibrator 8.1, the second power amplifier 5.2, the second input of which is connected to the output of the master oscillator 1, the first transmitting antenna device 9.1, as well as the serially connected sawtooth generator 10, the second controlled delay line 4.2, the second standby multivibrator 8.2, the third power amplifier 5.3, the second input of which is connected to the master oscillator 1, and a second transmitting antenna device 9.2.

The second controllable delay line 4.2 contains (see FIG. 2) an N-tap time delay line 4.2.1 (see VK Sloka. Issues of processing radar signals. M: Sov. Radio. 1970, p. 178-180 ), the input of which is the first input of the controlled delay line 4.2 and is connected to the output of the pulse generator 10, electronic keys 4.2.2, 4.2.3 ... 4.2 (N + 1) and amplitude selectors 4.2 (N + 2), 4.2 (N + 3 ) ... 4.2 (2N + 1), which can be performed as any two-level amplitude selectors (see Ya. S. Itskhoki, NI Ovchinnikov. Pulse and digital devices. M: Sov. Radio. 1973, p.552 )

The first inputs of electronic keys 4.2.2, 4.2.3 ... 4.2 (N + 1) are connected to the terminals of the N-tap time delay line 4.2.1, the second inputs are connected to the outputs of the amplitude selectors 4.2 (N + 2), 4.2 (N + 3 ) ... 4.2 (2N + 1), the inputs of which are connected to a common second input of the second controlled delay line 4.2, connected to the output of the sawtooth voltage generator 10.

The outputs of the electronic keys 4.2.2, 4.2.3 ... 4.2 (N + 1) are output to a common bus, which is the output of a controlled delay line.

The transceiver antenna device 6 is the main radar antenna device. It can be made in the form of standard antenna devices (mirror, lens, phased antenna arrays, etc. see the Guide to radar. / Under the editorship of M. Skolnik, vol. 2. M .: Sov radio, 1977, 405 pp.) .

The first and second transmitting antenna devices 9.1 and 9.2, emitting additional pulses, are auxiliary antenna devices and are made in the form of aperture antennas. Antenna devices 9.1 and 9.2 have a main lobe width of 90 ° in the azimuthal plane and at least 12 ° in the elevation plane and are oriented at an angle of ± 45 ° to the normal to the flight line of PLSS-type reconnaissance aircraft (Fig. 4). Horn antennas can be used as antenna devices with such diagrams (see Zhuk M.S., Molochkov Yu.B. Design of antenna-feeder devices. M: Energy, 1966, 647 pp.).

The gain of the second and third (auxiliary) power amplifiers 5.2 and 5.3 lies within

where K _y1 is the gain of the first power amplifier 5; G ₁ - gain of the main antenna device 6, that is, the proportion of radar radiation that falls on the side and rear lobes of the radiation pattern of the antenna device; P _sg - signal power at the output of the master oscillator 1, W, G _side - gain of auxiliary devices (9.1, 9.2) along the first lobe of the radiation pattern; λ is the wavelength, m

Coherent pulse radar operates as follows (figure 3). The master oscillator 1 creates continuous oscillations that are subjected to pulse modulation (U _them ) with a repetition period (T) of at least 100 μs for typical coherent pulse radars, amplified in the first 5.1 power amplifier and emitted by the antenna device 6 with a time delay by τ _ls1 = 2-5 μs (U ₀ ), determined by the presence in the main radar path of the first delay line 4.1. After reflection from the target, they are received by the antenna device 6 and processed in the receiving device 7. The pulse modulator 3 is controlled by pulses of the synchronizer 2, which are phased by the oscillations of the master oscillator 1.

Synchronously with the signals emitted by the main antenna device 6, the first and second auxiliary antenna devices 9.1, 9.2, a series of additional pulses (U _d1 , U _d2 ) are emitted, previously generated by the waiting multivibrators 8.1, 8.2, amplified and subjected to pulse modulation in the second and third amplifiers power 5.2, 5.3. Using standby multivibrators allows you to generate additional rectangular pulses with the required amplitude and duration.

Due to the presence of the first delay line 4.1, the signals emitted by the auxiliary antennas 9.1, 9.2 outstrip the signal emitted by the main antenna device 6 by the delay time τ _lz1 = const, the value of which exceeds the duration of the pulses generated in the main path. In this case, the duration of the pulses of the additional signal generated by the waiting multivibrator 8.1 should be not less than the delay time of the main signal, i.e., τ _∂1 ≥τ _lz1 + τ ₀ . Thus, the delay time of the first delay line must satisfy the condition

The presence of the second controlled delay line 4.2 provides an increase from time to time delay of additional signals emitted by the second transmitting antenna device 9.2 (U _d2 ), relative to the signals emitted by the first transmitting antenna device 9.1 (U _d1 ).

The choice of the maximum delay time of the second controlled delay line 4.2 is carried out from the condition of constant "overlap" of the main (U ₀ ) and second additional (U _d2 ) signals, that is, the maximum value of the delay time of the signals emitted by the second transmitting antenna device 9.2 (U _d2 ) is not must exceed the delay time of the signals emitted by the first transmitting antenna device 9.1 (U _d1 )

The control of the delay time (τ _ULZ2 ) of the signals emitted by the second transmitting antenna device 9.2 is carried out using a sawtooth voltage generator 10, the output of which the control voltage (U _GPN ) is transmitted to the second input of the controlled delay line 4.2 (see figure 3) and through amplitude selectors 4.2 (N + 2), 4.2 (N + 3) ... 4.2 (2N + 1) go to the second inputs of electronic keys 4.2.2, 4.2.3 ... 4.2 (N + 1), the first inputs of which are connected to the corresponding outputs N-tap of the time delay line 4.2.1.

The parameters of the control voltage U _GPN (the length of the linear section t _l , the recovery period t _in , the repetition period T _GPN , the amplitude of the linear section U _l ) are selected from the required maximum value of the delay time τ _ulz2max and the required speed of the signal _drift from the second transmitting antenna device 9.2 (the required switching speed of the conclusions of the N-tap time delay line 4.2.1), the corresponding speed of the simulated radar movement (v _c = 5 ... 15 m / s).

The control voltage U _ГПН linearly increasing during several periods of signal emission from the output of the sawtooth voltage generator 10 is supplied to the second inputs of the switches 4.2.2, 4.2.3 ... 4.2 (N + 1) through the amplitude selectors of the voltage level 4.2 (N + 2), 4.2 (N + 3) ... 4.2 (2N + 1), the signal at the output of which appears when the control voltage U of the _GPN is within the specified limits

,

,

,

- минимальное и максимальное пороговые напряжения k-го амплитудного селектора 4.2(N+2), 4.2(N+3)…4.2(2N+1). Тем самым осуществляется последовательное по времени подключение через электронные ключи 4.2.2, 4.2.3…4.2(N+1) N-отводной линии временной задержки 4.2.1.Where

,

- the minimum and maximum threshold voltage of the k-th amplitude selector 4.2 (N + 2), 4.2 (N + 3) ... 4.2 (2N + 1). Thus, a serial connection is made through electronic switches 4.2.2, 4.2.3 ... 4.2 (N + 1) of the N-branch time delay line 4.2.1.

If there are signals at both inputs of one of the electronic keys 4.2.2, 4.2.3 ... 4.2 (N + 1), the signal U _yls2 from the corresponding output of the N-tap time delay line 4.2.1 is fed to the common bus, which is the output of the controlled delay line 4.2 and then goes to the input of the second waiting multivibrator 8.2 (see Fig. 1), which forms an additional pulse (U _d2 ) of duration τ _∂2 = τ _∂1 ≥τ _lz1 + τ ₀ , the leading edge of which is formed with a delay corresponding to the signal delay, coming from the output of the controlled delay line 4.2.

In the initial state, the leading edges of the first U _d1 and second U _d2 additional signals are offset by the radiation time by at least 0.25 μs.

The width of the radiation pattern of auxiliary antennas 9.1, 9.2 in the elevation plane is determined from the condition that an additional signal hits the input of the reconnaissance equipment of PLK-type reconnaissance aircraft, the on-duty shift of which usually includes three aircraft.

в угломестной плоскости. Ширина диаграммы направленности вспомогательных антенных устройств 9.1, 9.2 в азимутальной плоскости должна составлять β_ДА=90°.At a maximum flight altitude of CP H = 20 km and the distance of their patrol route from the contact line of troops L = 100 km (see www.6478867.com/tip-gan.pdf) the beam pattern of auxiliary antenna devices 9.1, 9.2 should not be less than $${\epsilon }_{D\mathrm{BUT}}=arctg\frac{H}{L}\approx {12}^{\circ }$$

in the elevation plane. The beam width of the auxiliary antenna devices 9.1, 9.2 in the azimuthal plane should be β _YES = 90 °.

To ensure masking of the radar signal emitted by the main antenna device along the side lobes of the DND in the angle sector 0 ± 90 ° by a series of additional pulses emitted by auxiliary antennas in the same sector, the gain of the second and third power amplifiers 5.2, 5.3 should, as in the prototype, satisfy the relation

where G is the gain of the auxiliary antenna device (9.1, 9.2).

With the width of the main lobe of the bottom beam of the auxiliary antenna device 90 ° × 12 °, and also taking into account that the antenna gain is found from the ratio (see the Radar Reference. Edited by M. Skolnik, vol. 2, M .: Sov. Radio, 1977, p. 56)

where θ _B , ψ _B is the DND width in orthogonal planes (degrees), G = 30, we obtain

To exclude the possibility of detecting an additional signal outside the sector 0-90 ° radiated by the first or second auxiliary antenna device 9.1, 9.2 along the side lobes of the beam, their level at the input of the receiver of the RTR RUKLSS system should not exceed the threshold of its sensitivity, that is, the condition

where K _np - the coefficient of mismatch of the polarization of the radar signal and the antenna of the reconnaissance receiver; K _pe - the transmission coefficient of the signal from the antenna to the input of the reconnaissance receiver; D - reconnaissance range; G _CR - gain antenna of the receiver; P _ol - receiver sensitivity.

When K = K _{np pH} = 0,5, G _ave = 10, P _ave = 10 ^-12 watt and D≥L = 100 km, we obtain

Combining (6) and (8), we obtain

Let's carry out an example of calculation for the following initial data. We take the power of the radar signal at the input of the main antenna device K _y1 P _sG = 200 kW, G ₁ = 0.5; G _side = 0.15, the irradiation distribution along the aperture is cosine and the level of the first side lobe relative to the main one is not more than 23 dB, λ = 0.03 m. Substituting the initial data in (7) and multiplying by P _sG , we find that the acceptable values the gain of the second or third power amplifier 5.2, 5.3 are selected from the condition under which the product K _y1 P _zG (signal power at the inputs of the first and second auxiliary antenna devices) lies in the range from 3.3 kW to 4.5 kW.

Thus, in the inventive device, as in the prototype, the power gains of the second and third power amplifiers K _y must satisfy the relation (4).

Power amplifiers 5.2, 5.3 can be performed on a standard elemental base, similar to that used in the first (main) power amplifier 5.1 (see the Guide to Radar. / Ed. M. Skolnik. T.3. M: Sov radio, 1979, 527 s.), While a lower gain is provided either by reducing the number of cascades, or by using less powerful amplification devices.

A decrease in the level of the signal emitted outside the sector 0 ± 90 ° can also be achieved by an appropriate choice of the distribution of radiation over the antenna aperture.

Due to the difference in the levels of the main and additional signals, the ratio of which at the input of the receiving device 7 is not less than the gain of the main antenna device 6 (in the existing radar technique, it lies within 10 ³ -10 ⁵ ), the interference effect of additional signals on radar receiver 7 is not essential, and if necessary can be eliminated by level selection.

In the PLSS RUK, the differential-ranging method is used to determine the location of pulse radars (see Atinov V.V. Development of high-precision weapons in the United States and prospects for creating reconnaissance-strike systems, Military Thought, No. 4, 1983, p.66), which measure the moments of arrival of the signal radiated along the side lobes of the bottom of the radar bottom at three CPs (with the RTR equipment placed on them) in accordance with the equations

where t _i , (i = 1, 2, 3) are the moments of arrival of the radar signal by CP equipment; x _i , y _i are the coordinates of CP at time t _i , c is the propagation velocity of radio waves (speed of light); x, y are the coordinates of the reconnaissance radar that defines two hyperbolic position lines.

When reconnaissance radar emitting a series of additional pulses, three options are possible. In the first embodiment, all CPs are located to the left of the normal to the line of contact of the troops (LSB) drawn through the radar position and measure the moments of arrival of the pulses (U _D1 , U ₀ ) along the leading edge (Fig. 3) emitted in the working sector of the first auxiliary transmitter devices 9.1, in the second version, all three CPs are located to the right of the normal to the LSW and measure the moments of arrival of signals at the leading edges of pulses (U _Д2 ) emitted in the working sector of the second auxiliary antenna device 9.2, and in the third one or two CPs income is measured I at a leading edge signal (U _D1) emitted in the operating sector of the first auxiliary antenna device 9.1, and on the other on a rising edge signal (U _D2) emitted in the operating sector of the second auxiliary antenna device 9.2.

As shown in the prototype, situations in which all CPs are located on one side of the normal to the LSW are unlikely, since the accuracy of reconnaissance of coordinates in this case is 300 m or more and the probability of a radar strike does not exceed 0.1.

In the third, most probable (typical) case, the hyperbolic position lines are shifted due to one signal ahead of the other by Δτ and satisfy the equation

where Δτ = τ _ulz2 .

In this case, due to the control (with a given speed) of the delay time τ _{uls2 of the} second additional signal (U _D2 ), the radar position line determined from it will be displaced in time, simulating the movement of the target (change of radar coordinates in time).

Evaluation of the technical result of the claimed device (reduction in the probability of hitting coherent-pulse radars with guided weapons of a reconnaissance-strike complex of the PLSS type up to its exclusion from the number of objects of destruction of the RUK due to the formation of additional signals ensuring the creation of periodically increasing errors in determining its location), compared with the prototype can be carried out on the basis of the following evidence.

In relation to the prototype in the presence of systematic errors in determining the location of the radar, which is inherent in the claimed device, the probability of determining the location of the radar is subject to the general Rayleigh law and the probability of damage to the radar is as (see Levin B.R. Theoretical fundamentals of radio engineering, v. 1, M .: Sov Radio, 1966, p. 121)

where Q (x, y) is the integral generalized Rayleigh-Rais distribution function (see Bark L.S. et al. Rayleigh-Rais distribution tables, Computing Center of the Academy of Sciences of the USSR, 1964), R _n is the radius of destruction of the ammunition, σ is the mean square error radar location, σ _n - standard error of the weapon guidance, G - radar location error defined as

where φ ₁ , φ ₂ are the angles at which the corresponding bases of the differential rangefinder system are visible from the radar standing point (Fig. 2).

Here L is the distance of the radar from the CP route (L≥100 km), D is the base between two CPs, φ is the angle between the normal to the CP flight path and the direction to the radar conducted through the central CP (Fig. 2).

φ = arctgD / L

In relation to the claimed device, the current error in determining the location of the radar will be

We will evaluate the probability of damage in relation to the prototype for the conditions, that is, when the radar is located at a distance from the line of sight equal to 100 km (see www.6478867.com/tip-gan.pdf) and the distance between CP is 200 km, φ = 0 ° . In this case, φ ₁ = φ ₂ = 64 °. To ensure in the prototype the mismatch between the leading edges of the signal pairs of the differential rangefinder intelligence system of the PLS-type ASM handheld for analysis is not less than Δτ = 0.25 μs, the error in determining the location of the radar as follows from formula (14) will be Г≈80 m.

The radius of destruction of the ammunition depends on the type of warhead, the power of the charge in TNT equivalent and can vary over a wide range from 20 to 100 m (see Evaluation of the effectiveness of fire damage by rocket attacks by artillery fire. - St. Petersburg: Galeya Print, 2006, p. 160- 162). For definiteness, we assume that the radius of destruction of the ammunition is 50 m.

The root-mean-square error of determining the location of a coherent-pulse radar is σ = 15 m (see www.6478867.com/tip-gan.pdf), and the accuracy of pointing the weapon by the radar method is ~ 10 m (see Atinov V.V. Development of high-precision in the USA weapons and prospects for the creation of reconnaissance and strike systems, Military Thought, No. 4, 1983, p.66).

, что соответствует значению функции Q(x, y)=0,1 (см. Барк Л.С. и др. Таблицы распределения Релея-Раиса, ВЦ АН СССР, 1964), то есть вероятность поражения составляет 0,1.In this case, the arguments of the Rayleigh-Rais function are equal: x = 2.8 (R _n = 50 m, σ = 15 m, σ _n = 10 m), $$y\approx \frac{G}{{\left({\mathrm{<figure-callout\; id="2"\; label="\sigma "\; filenames="00000026.png"\; state="\{\{state\}\}">\sigma </figure-callout>}}^2+{\sigma }_n^2\right)}^{\mathrm{one}/2}}\approx 4.3$$

, which corresponds to the value of the function Q (x, y) = 0.1 (see Bark L.S. et al. Relay-Rais distribution tables, Computing Center of the Academy of Sciences of the USSR, 1964), that is, the probability of damage is 0.1.

In relation to the claimed device, suppose that the minimum delay time of the second controlled delay line is τ _yzl2min = _Δτ = 0.25 μs. In this case, as for the prototype, the probability of failure will be 0.1.

, что соответствует значению функции Q(x, y)≈0.The maximum delay time is selected from the condition τ _ulz2max ≤τ _lz1 . Taking into account that τ _lz1 = 2-5 μs, for definiteness, we assume that τ _yzl2max = _Δτ = 1 μs. In this case, the error in determining the location of the radar will be G≈315 m. Then the arguments of the Rayleigh-Rais function (for the same values of the radius of destruction of the ammunition and the standard errors of determining the location of the radar and pointing the weapon) will be x = 2.8, $$y\approx \frac{G}{{\left({\mathrm{<figure-callout\; id="2"\; label="\sigma "\; filenames="00000026.png"\; state="\{\{state\}\}">\sigma </figure-callout>}}^2+{\sigma }_n^2\right)}^{\mathrm{one}/2}}\approx 17.5$$

, which corresponds to the value of the function Q (x, y) ≈0.

To create the effect of simulating the movement of the radar at a speed of 5 ... 10 m / s for the adopted minimum (80 m) and maximum (315 m) errors in determining the location of the radar, the pulse repetition period of the sawtooth voltage will be 47 ... 23.5 s.

Thus, due to the periodic change in time of the radar location error, the probability of its damage becomes close to zero. In addition, radar positioning errors periodically changing over time lead to the creation of an effect simulating its movement, which helps to exclude it from the number of objects of destruction of the RUK.

Claims (1)

A coherent-pulse radar station containing serially connected master oscillator, synchronizer, pulse modulator, first delay line, first power amplifier, to the second input of which the output of the master oscillator is connected, a transmitter-receiver antenna and a receiving device, the second input of which is connected to the output of the master generator, and the third to the output of the synchronizer, connected to the second output of the pulse modulator in series connected to the first pulse shaper, second the second power amplifier, the first transmitting antenna device and the second delay line connected in series to the first input of which the output of the pulse modulator, the second pulse shaper, the third power amplifier, to the second input of which the output of the master oscillator and the second transmitting antenna device are connected, and the gain the power of the second and third power amplifiers K _y satisfy the condition
$${\mathrm{TO}}_{\mathrm{at}}\ge \frac{{\mathrm{TO}}_{\mathrm{at}\mathrm{one}}{G}_{\mathrm{one}}}{G},$$

where K _y1 is the power gain of the first power amplifier, G ₁ is the gain of the transceiver antenna device, G is the gain of the first and second antenna devices, characterized in that a sawtooth voltage generator is connected to the second input of the second line the delay, which is controlled, while the delay time of the first delay line τ _lz1 and the maximum delay time of the second controlled delay line τ _{ulz2max is} chosen from the conditions
τ _lz1 ≤τ _D1 -τ _o,
τ _ulz2max ≤τ _lz1,
where τ _d1 , τ _о are the pulse durations of the additional and main signals, respectively, and the first and second pulse shapers are made in the form of waiting multivibrators.

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