Device for jamming radar stations
(57) Abstract:Usage: in radio engineering for electronic countermeasures radar detection and tracking. The inventive device for jamming radar stations contains a receiving antenna 1, the input key 2, the amplifier 3 high frequency (UHF), switch 4, the splitter 5, the band-pass filter 6, a detector 7, the amplifier 8, the imaging unit 9 of the control signal, the key 10, a decoder 11, the adder 12, the output UHF 13, the generator 14, the gate pulses, transmitting antenna 15, block 16 measuring the length of the review cycle of the radar station, unit 17 of the control and synchronization , channel key. The technical result - improving the efficiency of station radar detection and tracking. 4 Il. The invention relates to electrical engineering and can be used for jamming radar detection and tracking.Known station interference with the lock on the frequency of the suppressed agent containing the receiving-transmitting antenna switch of acceptance, the pulse generator UHF transceiver, mixer, receiver, amplifier, limiter, discriminator, cascades of sound frequency, frequency, frequency, modulator and a frequency modulator, performing alternate switching on of the transmitter and receiver determines the frequency of the radar signals of the enemy and automatically rebuild the transmitter frequency to the frequency of the received signal 
A disadvantage of the known station interference (JV) is the low channels, as in the situation when the directivity of the antenna (BOTTOM) JV is multiple radars operating at different frequencies will be suppressed only one of them.Also known electronic jamming, containing the receiving antenna, a receiver, a filter, a generator of a continuous signal, the detector signal, pulse generator, a Gating scheme and transmitting antenna provides a CW signal at the operating frequency of the radar, interrupted simultaneously with each pulse repetition period of the radar received by the receiver 
A disadvantage of the known system of electronic jamming is odnogolosy to serve purposes in circumstances where the BOTTOM can be several of them.The closest in technical essence to the proposed JV is a multi-channel avtomatizirovan the th antenna, the input switch, the amplifier high frequency (UHF), the switch, the output amplifier of high frequency and transmitting antenna and the splitter, the input connected to the output of the amplifier high frequency and the switch input and N outputs connected to respective inputs of chains, each of which consists of series-connected band-pass filter, a detector, an amplifier (WAC), the gate driver control, key switch circuit, a second input connected to the output of the corresponding bandpass filter, and the output is connected to respective of the N inputs of the adder, the output of which is connected to the output switch and the first input of the output amplifier high frequency, a second input connected to a second output of the shaper strobe, the first output of which is connected to a second input of the input switch 
A disadvantage of the known device is that it effectively creates interference airborne radar (radar), working in close frequencies (in one frequency channel). In the situation when at the BOTTOM of the JV is several radar and they work on different frequencies in different frequency channels) due to the increased width of the spectrum of the interference power density interference with the x, the power density of the interference posed by each of them, will be reduced in two times, and therefore the range of suppression will decrease 1.4 times.The purpose of the invention increase the efficiency of the station radar detection and tracking.In Fig.1 shows a structural electrical circuit station interference; Fig.2 block diagram of the unit of measurement of the cycle duration of the review radar station (radar), and Fig.3 is a graph according to the probability of correct tracking of targets on the signal to noise ratio = q2(1+V2in terms of UWB and SPP; Fig.4 the algorithm for determining the parameters of noise intermittent noise (l the number of suppressed ESBL, m(l) numbers of frequency channels, p(l) the duration of the intermittent interference, Tp(l) the repetition period of intermittent interference).Device for jamming radar stations contains a receiving antenna 1, the input key 2, the amplifier 3 high frequency (UHF), switch 4, the splitter 5, the band-pass filter 6, a detector 7, the amplifier 8, the imaging unit 9 of the control signal, the key 10, a decoder 11, the adder 12, the output UHF 13, the generator 14, the gate pulses, transmitting antenna 15, block 16 measuring the length of the review cycle, radar, block 17 UI element 19, the key 20, the trigger 21 separate run, a differentiating circuit 22, a diode limiter 23, standby multivibrator 24, the trigger 25 managed accounts running, the meter 26 time intervals.Device for jamming radar stations operates as follows.The signals taken by the receiving antenna 1 through the opened in exploration mode input key 2, amplified UHF input 3, in accordance with its carrier frequency through a band-pass filter 6 will get along with the noise signal in one frequency channel is detected by the detector 7 is amplified by the amplifier and fed to the generator 14 of the control signal channel and the block 16 measuring the duration of the cycle of the review radar. In response to the received signal, the amplitude of which exceeds a certain threshold level of the imaging unit 9 of the control signal U in this frequency channel is the closure of the key 10. In block 16 of the measurement of the cycle duration of the review radar signals, exceeded the threshold of threshold element 19, through the open in the initial state, the key 20 are received at the first input of the trigger 21 separate run, throw him down.At the output of the differentiating circuit 22 is formed sharp pulse, which is sa standby multivibrator 24 is chosen from the condition of exceeding the duration of the radiation of the radar station interference in the review. The pulse output standby multivibrator 24 is fed to the trigger 25 managed accounts start to the second input key 20 and the second input of the trigger 21 separate run. Under the influence of the pulse output standby multivibrator 24 is tilting trigger 21 separate starting in the initial state, rollover trigger 23 managed by the counting starts, and the key 20 stops flowing to the input unit 16 of the measurement cycle time overview of radar pulses, radar during the time until the BOTTOM of the radar detection and tracking continues to be focused on SP.At the next review cycle radar detection and tracking all described the work of the joint venture is repeated. When the trigger 25 managed accounts start re-tipped. At its output the results of two cycles of review radar detection and tracking is pulse equal in duration to the cycle of the review of this radar. This pulse is input to the meter 26 time slots of the channel.Information about the duration of the review cycle radar detection and tracking in this frequency channel in the form of a digital code supplied from the output of the meter 26 temporary corresponding inputs of a block 17 with other frequency channels.In block 17 on the basis of information received from the frequency channels produces a solution (one of the options implemented algorithm in block 17 shown in Fig. 4) the number of frequency channels on which there will be interference, and the interference parameters (duration, period) in each of the frequency channels suppressed.In accordance with this decision unit 17 in the mode of jamming will issue sequentially in time with the cycle equal to the repetition period of the interference Tpin the form of parallel digital code information about the numbers of frequency channels on the decoder 11. The decoder 11, by recognizing the code combination, provides a corresponding output control signal to the corresponding code combination channel key 18. The duration of each control signal is determined by the duration of the interfering signal for the channel specified by the block 17.Thus, the channel key 18 of the corresponding channel will be open for a time equal to the duration and repetition period of the interference in this frequency band.The interference signal is formed by modulating the received signal radar thermal noise, passing through the public keys 10, which adopted the signals to the in the adder 12, and the gain in the output UHF 13.Intermittent noise disturbance from the output of the output UHF 13 is fed to the transmitting antenna 15 and is emitted in the direction of the suppressed radar detection and tracking.When entering the block 17 information about the operation of radar detection and tracking with multiple frequency channels it in accordance with its algorithm determines the number of suppressed radar, the order of their suppression and settings intermittent interference in the frequency channel. 1. DEVICE FOR JAMMING RADAR STATIONS containing connected in series receiving antenna, the input key, the amplifier high frequency (UHF), the switch output UHF and transmitting antenna and the splitter, the input connected to the output of the UHF and N outputs of the splitter connected to respective inputs of the N channels, the outputs of which are connected to the inputs of the adder, and the oscillator strobe pulses, the first and second outputs of which are connected respectively to the control inputs of the input key and UHF output, the output of which is connected the output of the adder, each channel contains a key and a serially connected band-pass filter, detector, amplifier, shaper signal upravlinnyalisovogo filter, characterized in that the input connected in series control unit and synchronization, performing the selection of the frequency channel and the formation of interference parameters, and the decoder, and each channel has been output channel key and the unit of measurement of the cycle duration of the review radar station (radar), an input connected to the second output of the amplifier, and the output unit of measurement of the cycle duration of the review radar is connected with the corresponding input of the control unit and synchronization, while the N outputs of the decoder are connected to control inputs of the respective output channel key information inputs which are connected to the outputs of the respective keys.2. The device under item 1, characterized in that the unit of measurement of the cycle duration of the review radar contains serially connected threshold element, the input of which is the input unit of measurement of the cycle duration of the review radar, the key trigger with separate run, a differentiating circuit, a diode limiter, standby multivibrator trigger with managed accounts and start measuring time intervals, the output of which is the output of the measurement unit length of the review cycle, radar, and out of standby Multifibre
FIELD: hydroacoustics; multielement hydroacoustic receiving antennas operating in listening mode.
SUBSTANCE: proposed antenna has hydroacoustic receivers with electrical communication lines integrated into flexible linear receiving modules shielded on rear end of surface and forming frame incorporating double-curvature sections. Each hydroacoustic receiver is mechanically coupled with its respective acoustic baffle. Flexible linear modules are disposed on double-curvature sections of forming frame in non-overlapping tiers and uniformly secured to forming frame throughout their entire length on sections between acoustic baffles. Longitudinal axes of flexible linear modules are disposed in each tier on section lines of double-curvature forming frame sections by vertical planes normal to antenna surface. Maximal distance between longitudinal axes of adjacent flexible linear receiving modules in each tier does not exceed (0.6 - 0.75)λw, where λw is wavelength in water at upper operating-frequency range.
EFFECT: reduced added maxima level, enhanced concentration factor and, hence, noise immunity of antenna, simplified assembly of the latter.
1 cl, 4 dwg
SUBSTANCE: method involves emission of a radar signal towards a target, reception of the signal reflected by the target using a monopulse antenna with a drive, having sum and difference channels, generation of a differential signal as a difference between amplitude values of signals from the sum and difference channels, comparison of amplitude of the differential signal with a threshold value, deciding on presence of a target if the amplitude of the differential signal exceeds the threshold value, determination of the angular position of the target from the position of the antenna the moment the differential signal exceeds the threshold value. The device which realises the method has a monopulse antenna with a drive, first and second mixers, a heterodyne, first and second intermediate frequency amplifiers, a subtraction unit, a threshold unit, first and second amplitude detectors, an antenna angular position sensor and a switch, connected in a certain way.
EFFECT: broader functional capabilities owing to simultaneous detection of a target and measurement of its angular position.
2 cl, 1 dwg
FIELD: physics, radio.
SUBSTANCE: invention relates to radiolocation and can be used in detecting radiolocation stations. The method of detecting power transmission towers involves emission of a radiolocation signal towards a power transmission tower, receiving the reflected signal, comparing the amplitude of the received signal with a threshold signal, the presence of a power transmission tower being indicated by the amplitude of the received signal exceeding the threshold value, receiving and detecting a signal emitted by power transmission wires, the presence of a power transmission line being indicated by the simultaneous exceeding of the threshold value by the amplitude of the signal received from the power transmission tower and detection of the signal emitted by power transmission wires. Apparatus for detecting power transmission towers has a first antenna with a drive, a second antenna which is mechanically connected to the first, two mixers, two intermediate frequency amplifiers, two threshold units, two heterodynes, a coincidence device, connected in a certain way.
EFFECT: high reliability of detecting power transmission towers.
2 cl, 1 dwg
SUBSTANCE: target detector has a mixer, an intermediate frequency amplifier, an amplitude detector, a first threshold device, as well as a processing unit consisting of a first and a second antenna, whose directional patterns of which form an equisignal direction, a first adder and subtractor, a first detector, a second threshold device, a first switch, a second detector, a third threshold device, connected to each other and the rest of the components of the device in a certain way.
EFFECT: broader functionalities owing to use of in-phase and anti-phase signals to detect targets.
SUBSTANCE: hydroacoustic antenna is mounted on-board a carrier which emits structural interference, consists of one or more pairs of linear extended antenna modules comprising hydroacoustic sensors, and arranged in pairs along the carrier, as well as a computing unit. The pair of linear extended antenna modules is arranged such that modules in a pair lie in a plane perpendicular to the housing of the carrier and lie equidistant from each other by a distance λ/2, which is half the minimum length of the hydroacoustic wave received by the antenna, wherein hydroacoustic sensors of each module are arranged in pairs opposite each other such that they are on a line perpendicular to the carrier, which provides sensitivity of each sensor pair to signals arriving from different directions in a plane perpendicular to the carrier. Also, output signals from each pair of hydroacoustic sensors are transmitted to the computing unit, where they are adaptively summed up, wherein a time delay is introduced into the line of the signal from the sensor lying closer to the carrier, where the value of said time delay is the time for propagation of the wave between hydroacoustic sensors in the corresponding pair for the direction of arrival of structural interference. As a result, a cardioid radiation characteristic is formed for the pair of sensors with the minimum in the direction of arrival of structural interference of the carrier, which leads to minimisation thereof.
EFFECT: reduced effect of structural interference of a carrier on signals of hydroacoustic sensors.
2 cl, 1 dwg
FIELD: radio engineering, communication.
SUBSTANCE: device for transmitting and receiving information employs nonlinear frequency-modulated signals at the transmitting side of a first and a second nonlinear frequency-modulated signal generator, and at the receiving side of a first and a second dispersive delay line for nonlinear frequency-modulated signal and a first and a second adjusted bandpass filter. The amplitude-frequency characteristics of the filters have the form of an inverse function with respect to the spectrum.
EFFECT: high noise immunity for a low signal-to-noise ratio.
FIELD: technologies for preventing interception of data.
SUBSTANCE: transferred signal is concealed via adding noises to communication line in speech frequency range with linear addition of speech data signal with noise signal of higher level. Concealment is removed via adaptive filtration of received signal with compensation of noise component and separation of data component. Addition of noises to communication line is performed from the side of sensor. Noise signal during addition of noises and adaptive filtration is formed of a sum of counts of several noise series with nonevent sizes via their random querying. At the beginning of each communication session a signal is sent to side of receiver, characterizing order of querying of series, and starting signal, providing for synchronism of noises addition and filtering processes. All operations are performed by means of microprocessors, mounted on both sides of communication line, dependently of loaded software providing for change of direction of transmission and protection of speech data signal. Invention allows to simplify protection while providing for absolute confidentiality of transmitted data.
EFFECT: higher reliability.
6 cl, 4 dwg
FIELD: radio engineering; secret intelligence protected radio communication systems.
SUBSTANCE: proposed radio communication system incorporating provision for suppressing enemy's radio communication means and radio control channels has information subsystem, noise jamming subsystem, noise memory subsystem, information subsystem elements, and subsystem elements interface unit; each element of information subsystem is made in the form of multichannel time-division radio station; each element of noise jamming subsystem is made in the form of time division multichannel radio station, and each of noise jamming subsystem elements is made in the form of barrage jamming transmitter built around noise signal generating driver; used as drivers are self-stochastic generator operating in different frequency bands.
EFFECT: enhanced intelligence protection of communication channels, simplified design, enhanced reliability.
2 cl, 13 dwg
FIELD: methods for protection of an active radar against antiradar missiles.
SUBSTANCE: in the method and device for protection of radar against antiradar missiles accomplished are radiation of sounding signals, detection of antiradar missiles, guidance of anti-aircraft missiles on the antiradar missile, destruction of the anti-radar missile by blasting of the warhead of the anti-aircraft missile, guidance of the anti-aircraft missile at least during a time period directly preceding the blasting of the warhead of the anti-aircraft missile, all this is conducted on the trajectory passing in the vicinity of the imaginary line connecting the antiradar missile and the radar, in this case constantly are determined the distance from the radar to the antiradar missile Dr-arm, from the radar to the anti-aircraft missile Dr-aacm and from the anti-aircraft missile to the antiradar missile Daacm-acm, and at the time moments leading the moments of radiation of the radar sounding signal by value t=(Dr-aacm+Daacm-arm-Dr-arm)/v, where v - velocity of light, commands are given from the radar to the anti-aircraft missile for radiation of a signal simulating the radar signal.
EFFECT: reduced dynamic errors of guidance of anti-aircraft missile on antiradar missile.
3 cl, 6 dwg
FIELD: espionage protection techniques.
SUBSTANCE: method includes serial scanning of target surface by nonlinear locator, recording and processing received response in PC with displaying of positions of semiconductor devices. In case of appearance of response on target surface on command from PC visible laser is enabled, response points are lighted by it, pictured using digital camera and recorded in PC. Responses are process in conjunction with target surface image and integral picture of responses is built. On basis of received picture additionally visually detected are potentially possible places for placing semiconductor devices, and also trajectories of tracing of communications on target surface, structures of inbuilt metal construction and anomalies in said structures.
EFFECT: higher precision, higher efficiency, broader functional capabilities.
FIELD: radio communications.
SUBSTANCE: system has transmitting portion, which contains clock pulse generator 1, first and second D-code generators 21-22, first and second generator of double frequency manipulation 31-32, adder 4, modulator 5, frequencies synthesizer 6, pseudo-random numbers generator 7. said portion is connected through broadcast line 8 to receiving portion, which has demodulator 9, frequencies synthesizer 10, pseudo-random numbers 11, signals selector 12, clock pulses generator 13, block for selecting additional series 14, block for folding additional series 15, solving block 16. new set of significant features provides for possible implementation of distributed receipt with code structure of specific orthogonal quadruple-encoded series without expansion of available frequency resource.
EFFECT: broader functional capabilities, higher trustworthiness, higher efficiency, higher interference resistance.
2 cl, 5 dwg
FIELD: radio engineering, possible radio-technical reconnaissance of radio-electronic means of enemy.
SUBSTANCE: radio-technical reconnaissance station contains antenna device 1, receiver 2, bearing device 3, analyzer 4 of received signal parameters, device 5 for memorizing and processing received information, telemetric device 6, receiving antennae 7-9, block 10 for readjustment, first 11 and second 23 heterodynes, mixers 12-14 and 24, amplifiers 17-19 of first intermediate frequency, detector 20, first 21 and second 31 delay lines, key 22, amplifier 25 of second amplification frequency, multipliers 26,27 and 30, narrowband filters 28,29 and 32, phase detector 33, phase meters 34 and 35, engine 15 and supporting generator 16.
EFFECT: expanded area of reconnaissance and increased number of detected radio-electronic means due to positioning of radio-technical reconnaissance station onboard the helicopter.
FIELD: technology for generating artificial interference for concealing electromagnetic channels leaking speech information.
SUBSTANCE: in accordance to invention, method includes generation, amplification and emission of concealing noise signal, and also substantial changes and additions, namely: noise signal is amplified in mode B or AB, pulse automatic-compensating stabilization of power amplifier powering voltage is utilized, stabilized voltage is filtered by upper frequencies filter, lower limiting frequency is higher than upper frequency of audible spectrum, but lower than frequency of pulse stabilizer.
EFFECT: increased efficiency of method while power for concealed equipment is delivered by industrial alternating-current network.
FIELD: radio engineering, namely, equipment for generating artificial interference, possible use for protecting information from leaking along vibro-acoustic channel from a room.
SUBSTANCE: in accordance to method for protecting speech information along vibro-acoustic channel, interference is generated for masking speech signal, while interference is formed as M-series of pulses with following transformation, while transformation of M-series of pulses is performed in form of generation of vibration impact signals, by which speech signal is multiplicatively masked, while M-series of pulses is generated from period to period in accordance to random rule.
EFFECT: increased efficiency of technical means for information protection, decreased acoustic radiations, interfering with negotiations, radiations, affecting operation of nearby radio-electronic means, and also disclosing a structure of noise interference, decreasing probability of it being filtered.
FIELD: engineering of equipment for counteracting commercial and industrial espionage.
SUBSTANCE: device includes auxiliary transmitting-receiving antenna, antenna commutator, controllable interference generator, radio radiation detector and additional generator of interference with individual antenna. Launch circuit of controllable interference generator is connected to of radio radiation detector. The latter is made with possible recording of beginning of emission of radio interface of cell phone during its communication with external device, determining presence and frequency channel of unsanctioned communication with radio interface and adjustment of frequency of controlled interference generator. Commutator is enabled with possible switching of auxiliary antenna from input of radio emission detector to output of controllable interference generator for suppressing unsanctioned data transfer through radio interface. Output of radio radiation detector is connected to controlling inputs of commutator and controlled interference generator. For additional interference generator, mode of permanent generation of interference is set in radio spectrum of global positioning systems, excluding capability for determining coordinates of cell phone.
EFFECT: increased efficiency of cell protection from unsanctioned pickup of information from radio interface with reliable suppression of attempts of determining current location of cell phone.
3 cl, 1 dwg
FIELD: technology for creating artificial interference for masking speech information in industrial network of alternating current.
SUBSTANCE: device (dwg. 1) contains rectifier 2 and, connected serially, noise signal generator 4, noise signal power amplifier 5 and emitter 6, in noise signal amplifier 5, mode B or AB is implemented, between rectifier 2 and power chain of noise signal generator 4 and power amplifier of noise signal, impulse automatic-compensation voltage stabilizer 8 is inserted, at output of which upper frequency filter is mounted, lower cut frequency of which is higher than upper frequency of audible spectrum, but lower than clock frequency of impulse automatic-compensation voltage stabilizer 8.
EFFECT: increased protection of sound amplification equipment from possible electromagnetic leakage of sound information along power chains.