Phase location finder

FIELD: radio engineering.

SUBSTANCE: device has the first, the second and the third receiving antennas, the first, the second and the third high frequency amplifiers, the first and the second heterodynes, the first, the second and the third mixers, the first, the second and the third multipliers, the first, the second, the third and the fourth narrowband filters, the first, the second and the third intermediate frequency amplifiers, frequency multiplier by two, the first, the second and the third phase detectors, the first and the second correlator units, the first, the second, the third and the fourth threshold units, the first, the second, the third and the fourth keys and unit for recording.

EFFECT: wide range of functional applications.

3 dwg

 

The proposed direction finder relates to the field of navigation and can be used for determining the angular coordinates of the radiation source photomanipulating (QPSK) signal. Known devices for measurements of radiation sources signals (ed. mon. The USSR№№558584, 1555695, 1591664, 1591665, 1602203, 1679872, 1730924, 1746807, 1832947; patents of the Russian Federation№№2006872, 2012010, 2010258, 2165628, 2189609; Kinkelin IE and other Phase method for the determination of coordinates. M: Owls. radio, 1979 and others).

Known devices closest to the proposed is the "direction finder" (patent RF №2012010, G 01 S 3/46, 1990), which is selected as a prototype.

The specified direction finder allows you to pelargonate radiation source QPSK signal only in one plane.

An object of the invention is to expand the functionality of the radio signal by the location of the radiation source QPSK signal in two planes.

The problem is solved in that the phase signal containing series-connected first receiving antenna, the first amplifier high frequency, the first mixer, a second input connected to the first output of the first oscillator, the first intermediate frequency amplifier, the first block correlators, a second input connected to the output of the second intermediate frequency amplifier, the first threshold unit and the second key, consistently the prisoners a second receiving antenna, the second amplifier high frequency, a second mixer, a second input connected to the first output of the second local oscillator, and a second intermediate frequency amplifier, cascaded first key and the second phase detector, connected in series to the second output of the first local oscillator of the first multiplier, a second input connected to the second output of the second local oscillator, and the first narrow-band filter connected in series to the output of the first intermediate frequency amplifier, a frequency multiplier is two, the second narrowband filter and the first phase detector, a second input connected to the output of the first notch filter, and the output connected to the control input of the first oscillator, and also the second and third threshold units, equipped with the third receiving antenna, the third intermediate frequency amplifier, a third mixer, the second and third multiplier products, the second block correlators, the fourth threshold unit, the third and fourth narrowband filters, third and fourth switches, the third phase detector and the recording unit, and to output a first intermediate frequency amplifier connected in series, a second multiplier, a second input connected to the output of the second intermediate frequency amplifier, the third narrowband filter, the second key and the first key, the second input is through the threshold of the second unit is connected to the second output of the first block correlators, the output of the third receiving antenna are connected in series, the third amplifier high frequency, a third mixer, a second input connected to the first output of the second local oscillator, a third intermediate frequency amplifier, the second set of correlators, a second input connected to the output of the first intermediate frequency amplifier, the fourth threshold unit, the third key, the fourth key, the second input is through the third threshold unit is connected to the second output of the second block correlators, the third phase detector and the recording unit, a second input connected to the output of the second phase detector, the output of the first intermediate frequency amplifier connected in series, a third multiplier, a second input which is connected to the output of the third intermediate frequency amplifier, and the fourth narrowband filter, the output of which is connected to a second input of the third key, the second inputs of the second and third phase detectors connected to the output of the first notch filter, in the form of a geometrical straight angle, the apex of which is located the first receiving antenna.

Structural diagram of the phase signal is presented in figure 1. The mutual arrangement of the receiving antennas is shown in figure 2. Frequency diagram illustrating the formation of the additional mirror and Raman) of the receiving channels is shown in figure 3.

The phase signal contains consistently included the first receiving antenna And the first amplifier 1 high frequency, the first mixer 5, a second input connected to the first output of the first local oscillator 3, the first amplifier 9 intermediate frequency, a first block correlators 14, a second input connected to the output of the second amplifier 10 intermediate frequency, the first threshold unit 15, the second key 28, the first key 16, the second input is a second threshold, the block 21 is connected to a second output of the first block correlators 14, and the second phase detector 17, are connected in series to the output of the amplifier 9 intermediate frequency, multiplier 11 frequency by two, the second narrow-band filter 12 and the first phase detector 13, the output of which is connected with the control input of the local oscillator 3, connected in series to the second output of the first local oscillator 3, the first multiplier 7, the second input is connected with the second output of the second local oscillator 4, and the first narrow-band filter 8, the output of which is connected to the second input of the phase detector 13, connected in series, the second reception antenna, the second amplifier 2 high frequency, the second mixer 6, a second input connected to the first output of the second local oscillator 4, the second amplifier 10 intermediate frequency, the second multiplier 22 the second input of which is connected to o the house of the amplifier 9 intermediate frequency, and the third narrowband filter 26, the output of which is connected to a second input of the second key 28, connected in series to the third receiving antenna, the third amplifier 18 high frequency, the third mixer 19, a second input connected to the first output of the second local oscillator 4, the third amplifier 20 intermediate frequency, the second block correlators 24, a second input connected to the first output of the amplifier 9 intermediate frequency, the fourth threshold unit 25, the third key 29, the fourth key 30, the second input is through the third threshold unit 22 is connected with the second output of the second block correlators 24, the third phase detector 31 and block 32 register, a second input connected to the output of the second phase detector 17, are connected in series to the output of the first amplifier 9 intermediate frequency third multiplier 23, a second input connected to the output of the third amplifier 20 intermediate frequency, and the fourth narrowband filter 27, the output of which is connected to a second input of the third key 29, the second inputs of the second 17 and 31 of the third phase detector connected to the output of the first notch filter 8. The receiving antenna is placed in the geometric form of a right angle, the apex of which is located the first receiving antenna And (2).

The phase direction finder works as follows. The received signals with the phase the second shift keying (QPSK):

U1(t)=Uccos[(ωwith±Δω)t+ϕk(t)+ϕ1],

U2(t)=Uccos[(ωwith±Δω)t+ϕk(t)+ϕ2],

U3(t)=Uccos[(ωwith±Δω)t+ϕk(t)+ϕ3], 0≤t≤Tc,

where Ucthat ωcthat ϕ13Tc- amplitude, carrier frequency, initial phase, and the duration of the signals;

±Δω - instability of the carrier frequency due to Doppler effect and other destabilizing factors;

ϕk(t)={0, ¶} - manipulated component phases, reflecting the law of phase manipulation in accordance with the modulating code M(t), and ϕk(t)=const kτe<t<(k+1)τeand may change abruptly at t=kτei.e. at the boundaries between elementary parcels (k=1, 2, ... ,N-1),

τeN - the length and number of basic assumptions which form the signal duration Tc(Tc=Nτe),

with the outputs of the receiving antennas a, b and C through the amplifiers 1, 2 and 18 of the high frequency received at the first inputs of the mixers 5, 6 and 19, respectively.

On the second inputs of the mixers 5, 6 and 19 are served voltage oscillators 3 and 4:

UG1(t)=UG1cos(ωG1t+ϕG1),

UT2(t)=UT2cos(ωT2t+ϕthe 2 ),

whose frequencies are separated by twice the value of the intermediate frequency

ωT2G1=2ωCR

and selected symmetric with respect to the high frequency

ωwithG1T2withAve

This circumstance leads to a doubling of the number of additional receiving channels, but creates favorable conditions for their suppression due to the correlation of the situation.

The outputs of the mixers 5, 6 and 19 are formed voltage Raman frequencies. The amplifiers 9, 10, and 20 are voltage only intermediate (differential) frequency:

UPR1(t)=UPR1cos[(ωCR±Δω)t+ϕk(t)+ϕPR1],

UAC2(t)=UAC2cos[(ωCR±Δω)t+ϕk(t)+ϕAC2],

UAC3(t)=UAC2cos[(ωCR±Δω)t+ϕk(t)+ϕAC3], 0≤t≤Tc,

where UPR1=1/2k1UcUG1;

UAC2=1/2k1UcUT2;

k1- gain mixers,

ωCRcG1T2with- intermediate (differential) frequency;

ϕPR11G1; ϕAC2T22; ϕAC3T23.

Voltage UG1(t) and UG2 (t) from the second outputs of the oscillators 3 and 4 are served at the two inputs of the multiplier 7, the output of which produces a voltage

Ug(t)=Ugcos[(ωT2G1)t+ϕg]=Ugcos(2ωCRt+ϕg),

where Ug=1/2k2UG1UT2;

k2- transfer coefficient multiplier,

ϕgT2G1,

given a narrow-band filter 8.

Voltage UPR1(t) and UAC2(t), UPR1(t) and UAC3(t) with the outputs of the amplifiers 9, 10, and 20 intermediate frequency received at the inputs of multiplier products 22 and 23, the outputs of which are formed the following voltage:

U4(t)=U4cos[(ωT2G1)t+ϕg+Δϕ1],

U5(t)=U4cos[(ωT2G1)t+ϕg+Δϕ2],

where U4=1/2k2UPR1UAC2;

ωT2G1=2ωCR;

Δϕ121=2cosαand

Δϕ231=2cosβand

d1d2measuring base;

λwavelength;

αandthat βandthe true angular coordinates (azimuth and elevation) of the source signals, which are allocated Skopelos the mi filters 26 and 27, respectively.

Voltage UPR1(t) and UAC2(t), UPR1(t) and UAC3(t) simultaneously fed to two input blocks of correlators 14 and 24, respectively, on the first outputs of which are formed of a voltage proportional to the correlation functions R1(τand R2(τ). These voltages are received at the inputs of threshold units 15 and 25, which compares with a threshold voltage Upor.

Since the channel voltage UPR1(t) and UAC2(t), UPR1(t) and UAC3(t) are formed by one and the same FMN-signal received through the main channel at the carrier frequency ωwithbut between them there is a strong correlation. The output voltage reaches the maximum value and exceeds a threshold level Uporin threshold units 15 and 25.

If the threshold voltage Uporin threshold units 15 and 25 are formed constant voltage received at the control inputs of the keys 28 and 29, opening them. In the initial state, the keys 16, 28, 29 and 30 are always closed.

The second outputs of the blocks 14 and 24 of the correlators are generated voltage proportional to the correlation functions R3(τand R4(τ). These stresses reach a maximum value only when the true values of the angular coordinates αandand βand. And only when these values in poro the new blocks 21 and 22 are formed constant voltage, received at control inputs of the keys 16 and 30, opening them.

When this voltage U4(t) and U5(t) narrowband outputs 26 and 27 through the public keys 28 and 16, 29 and 30 are received at the first inputs of the phase detectors 17 and 31, respectively, the second inputs of which are supplied with voltage Ug(t) output from the notch filter 8. The outputs of phase 17 and 31 are formed of a low-frequency voltage:

UH1(α)=UHcosΔϕ1,

UH2(α)=UHcosΔϕ2,

where UH=1/2k3U4Ug

k3- gain of the phase detector;

proportional to the phase shifts Δϕ and Δϕ2. These voltages are fixed block 32 of the Desk.

To ensure the symmetry of the carrier frequency ωcrelative frequencies ωG1and ωT2local oscillators 3 and 4 is used, the system phase-locked loop consisting of sequentially connected to the output of the amplifier 9 intermediate frequency multiplier 11 frequencies at the two narrow-band filter 12 and the first phase detector 13, a second input connected to the output of the notch filter 8, and the output connected to the control input of the local oscillator 3.

Converted by the frequency FMN signal UPR1(t) from the output of the amplifier 9 intermediate frequency received at the input will multiply the I 11 frequency by two, which can be used multiplier, two inputs of which served the same converted by the frequency FMN signal UPR1(t).

At the output of the multiplier 11 frequencies at the two formed a harmonic voltage:

U6(t)=U6cos[2(ωCR±Δω)t+2ϕPR1],

where U6=1/2k2UPR12.

As 2ϕto(t)={0, 2¶}, then the specified oscillation phase shift keying already missing. Harmonic oscillation U6(t) appears as a narrow-band filter 12 and is supplied to the first input of phase detector 13, to the second input of which receives the voltage Ug(t) output from the notch filter 8. If these voltages differ from each other in frequency or phase, the output of phase detector 13 produces a control voltage. And the amplitude and polarity of this voltage depends on the degree and direction of deviation of the carrier frequency ωwiththe received QPSK signal relative to the frequency ωG1and ωT2local oscillators 3 and 4. Control voltage affects the local oscillator 3, changing its frequency ωG1so, to preserve the symmetry of the carrier frequency ωwithrelative frequencies ωG1and ωT2local oscillators 3 and 4.

ωT2G1=2ωCRthat ωwithG1T2withAve

The work described above, the phase of the signal, corresponds to the case of the reception of the useful signal QPSK signal in the main channel frequency ωwith(figure 3).

If a false signal (interferer) is taken by the first image channel frequency ω31or on the second image channel frequency ω32on the first outputs of the blocks 14 and 24 correlators voltage is missing. The keys 28 and 29 do not open, and these interfering signals (noise) are suppressed.

For a similar reason suppressed false signals (interference), adopted by the first Raman channel at the frequency ωK1on the second Raman channel at the frequency ωK2or any other additional channel.

If the interfering signals (noise) are taken by the first and second image channel at frequencies ω31and ω32on the first outputs of the blocks 14 and 24 of the correlators are formed voltage. However, the keys 28 and 29 in this case is not opened. This is because the channel voltage are formed of different spurious signals (noise)taken at different frequencies ω31and ω32. So between the channel voltages there is a weak correlation. The output voltages of the blocks 14 and 24 of the correlators is not DOS is Haut maximum value and does not exceed the threshold voltage U porin threshold units 15 and 25. The keys 28 and 29 do not open, and these interfering signals (noise) are suppressed.

For a similar reason is suppressed, and all other false signals (interference)received simultaneously by two or more other channels.

The phase signal is invariant to the type of modulation and instability of the carrier frequency of the received signals. Finding the source of radiation QPSK signals is at a stable frequency equal to the difference of the frequencies of the local oscillators ωT2G1. The phase direction finder provides increased robustness of reception of QPSK signals. This is achieved by the suppression of spurious signals (noise)taken on additional channels. Moreover, to suppress these signals are used correlation processing of the received QPSK signals, correlation function which has a remarkable property. Due to the correlation processing of the received QPSK signal is eliminated and the ambiguity of phase measurements.

Thus, the proposed phase signal compared to the prototype provides a direction finding QPSK signals in two planes.

Improving the accuracy of measurements is achieved by increasing the measurement bases d1and d2and the resulting ambiguity is eliminated correlation processing of the received FM the signals. Suppression of spurious signals (noise)taken on additional channels, it also provides the correlation processing. It should be noted that the correlation function FMN signals has a remarkable feature: it has a low level of side lobes and a relatively high level of the main lobe.

The location of the receiving antennas in the form of a geometrical straight angle, the top of which is placed the antenna common to the azimuth and elevation plane, compared with the location of the receiving antennas in the form of a classical geometric cross provides the reduction of the number of receiving antennas and channels and dictated by ideology measurements.

Spectrum width Δϕcthe received QPSK signal is determined by the duration of τeelementary parcels (Δfc=1/τe), while the spectral width Δfgharmonic oscillations U4(t) and Ug(t) is determined by their duration of Twith(Δfg=1/Twith), i.e. the spectrum of the input QPSK signal is minimized at N times (Δfc/Δfg=N). This allows using narrowband filters 26 and 27 to allocate harmonic oscillations while filtering out much of the noise and interference, i.e. to increase the real sensitivity of the phase signal when the light source direction finding is ka radiation QPSK signals.

Thus, the functionality of the direction finder expanded.

The phase signal containing series-connected first receiving antenna, the first amplifier high frequency, the first mixer, a second input connected to the first output of the first oscillator, the first intermediate frequency amplifier, the first block correlators, a second input connected to the first output of the second intermediate frequency amplifier, the first threshold unit and the second key, cascaded second receiving antenna, the second amplifier high frequency, a second mixer, a second input connected to the first output of the second local oscillator, and a second intermediate frequency amplifier, cascaded first key and the second phase detector, connected in series to the second output the first local oscillator of the first multiplier, a second input connected to the second output of the second local oscillator, and the first narrow-band filter connected in series to the output of the first amplifier intermediate frequency multiplier frequency by two, the second narrowband filter and the first phase detector, a second input connected to the output of the first notch filter, and the output connected to the control input of the first oscillator and the second and third threshold blocks, characterized in that it is equipped the third receiving antenna, the third amplifier high frequency, a third mixer, a third intermediate frequency amplifier, the second and third multiplier products, the second block correlators, the fourth block correlators, the fourth threshold unit, the third and fourth narrowband filters, third and fourth switches, the third phase detector and the recording unit, and to output a first intermediate frequency amplifier connected in series, a second multiplier, a second input connected to the output of the second intermediate frequency amplifier, the third narrowband filter, the second key and the first key, the second input is a second threshold unit is connected to the second output of the first block correlators, the output of the third receiving antennas are connected in series, the third amplifier high frequency, a third mixer, a second input connected to the first output of the second local oscillator, a third intermediate frequency amplifier, the second set of correlators, a second input connected to the output of the first intermediate frequency amplifier, the fourth threshold unit, the third key, the fourth key, the second block through which the third threshold unit is connected to the second output of the second block correlators, the third phase detector and the recording unit, a second input connected to the output of the second phase detector, Vihterpalu of the intermediate frequency amplifier connected in series, a third multiplier, a second input connected to the output of the third intermediate frequency amplifier, and the fourth narrowband filter, the output of which is connected to a second input of the third key, the second inputs of the second and third key, the second inputs of the second and third phase detectors connected to the output of the first notch filter, the receiving antenna is placed in the geometric form of a right angle, the apex of which is located the first receiving antenna.



 

Same patents:

FIELD: radio engineering, applicable in electromagnetic reconnaissance, radio navigation and radio detection and ranging for determination of the direction to the source of radiation or reflection of radio waves.

SUBSTANCE: the phase direction finder has two antennas, two receiving paths, three phase shifters, two phase detectors, two limiters, three adders, two modulus computation devices, subtracting device, amplifier, comparator, gate circuit and an oscillator.

EFFECT: enhanced accuracy of direction finding and excepted its dependence of the attitude of the object of direction-finding.

2 cl, 10 dwg

FIELD: radio engineering, applicable for location of posthorizon objects by radiations of their radars, for example, of naval formations of battle ships with operating navigational radars with the aid of coastal stationary or mobile passive radars.

SUBSTANCE: the method consists in detection of radiations and measurement of the bearings (azimuths) with the use of minimum two spaced apart passive radars, and calculation of the coordinates of the sources of r.f. radiations by the triangulation method, determination of location is performed in three stages, in the first stage the posthorizon objects are searched and detected by the radiation of their radars at each passive radar, the radio engineering and time parameters of radar radiations are measured, the detected radars with posthorizon objects are identified by the radio engineering parameters of radiations and bearing, and continuous tracking of these objects is proceeded, the information on the objects located within the radio horizon obtained from each passive radar is eliminated, the working sector of angles is specified for guidance and tracking of the selected posthorizon object, in the second stage continuous tracking of one posthorizon object is performed at least by two passive radars, and the time of reception of each radar pulse of this object is fixed, in the third stage the period of scanning of this radar, the difference of the angles of radiation by the main radar beam of each passive radar and the range to the posthorizon object with due account made for the difference of the angles of radiation are determined by the bearings (azimuths) measured by the passive radar and the times of reception of each pulse of the tracked radar. The method is realized with the aid at least of two spaced apart passive radars, each of them has aerials of the channel of compensation of side and phone lobes, a narrow-band reflector-type aerial, series-connected noiseless radio-frequency amplifier, multichannel receiving device, device of primary information processing and measurement of carrier frequency, amplitude and time of reception of signals of the detected radar, device of static processing of information and measurement of the bearing, repetition period, duration of the train and repetition of the pulse trains and a device for calculation of the difference of the angle of radiation of the aerials of the passive radars by the detected radar.

EFFECT: reduced error of measurement of the coordinates of posthorizon sources of radio-frequency radiations.

3 cl, 5 dwg

FIELD: finding of azimuth of radio emission source (RES) in wide-base direction finding systems.

SUBSTANCE: angle of azimuth of RES is measured with high degree of precision due to elimination of methodical errors in direction finding caused by linearization of model electromagnet wave propagation wave front. As surface of RES location the plane is used which has RES line of location which has to be crossing of two hyperbolic surfaces of location corresponding to difference-time measurement. Method of RES direction finding is based upon receiving its signal by three aerials disposed randomly, measuring of two time differences of RES signal receiving by aerials which form measuring bases and subsequent processing of results of measurement to calculate values of RES angles of azimuth and coordinates of point through which the RES axis of sight passes. The data received are represented in suitable form. Device for realization of the method has three aerials disposed at vertexes of random triangle, two units for measuring time difference of signal receiving, computing unit and indication unit. Output of common aerial of measuring bases is connected with second inputs of time difference meters which receive signals from outputs of the rest aerials. Measured values of time differences enter inputs of computing unit which calculates values of RES angle of azimuth and coordinates of point through which the RES axis of sight passes. Data received from output of computing analyzing unit enter indication unit intended for those data representation.

EFFECT: widened operational capabilities of direction finder.

2 cl, 7 dwg

The phase signal, // 2206901

The invention relates to electrical engineering and can be used in multi-channel RDF, radar, sonar and other systems, passive and active location, using the receiving antenna arrays and methods for multi-channel spatial-temporal signal processing, and systems spatially dispersed and polarization-diversity reception

Direction finder // 2190235
The invention relates to electrical engineering and can be used for detection, reception, direction finding and analysis phase-shift keyed (QPSK) signals against interference

The phase signal, // 2189609

The invention relates to radio navigation, radio navigation and can be used to determine the location and movement of radiation sources of complex signals

The invention relates to electrical engineering and can be used for detection and estimation of the number of spatially-correlated radiation sources in RDF, radar, sonar, geophysical and other multi-channel systems, passive and active locations that use antenna arrays

FIELD: finding of azimuth of radio emission source (RES) in wide-base direction finding systems.

SUBSTANCE: angle of azimuth of RES is measured with high degree of precision due to elimination of methodical errors in direction finding caused by linearization of model electromagnet wave propagation wave front. As surface of RES location the plane is used which has RES line of location which has to be crossing of two hyperbolic surfaces of location corresponding to difference-time measurement. Method of RES direction finding is based upon receiving its signal by three aerials disposed randomly, measuring of two time differences of RES signal receiving by aerials which form measuring bases and subsequent processing of results of measurement to calculate values of RES angles of azimuth and coordinates of point through which the RES axis of sight passes. The data received are represented in suitable form. Device for realization of the method has three aerials disposed at vertexes of random triangle, two units for measuring time difference of signal receiving, computing unit and indication unit. Output of common aerial of measuring bases is connected with second inputs of time difference meters which receive signals from outputs of the rest aerials. Measured values of time differences enter inputs of computing unit which calculates values of RES angle of azimuth and coordinates of point through which the RES axis of sight passes. Data received from output of computing analyzing unit enter indication unit intended for those data representation.

EFFECT: widened operational capabilities of direction finder.

2 cl, 7 dwg

FIELD: radio engineering, applicable for location of posthorizon objects by radiations of their radars, for example, of naval formations of battle ships with operating navigational radars with the aid of coastal stationary or mobile passive radars.

SUBSTANCE: the method consists in detection of radiations and measurement of the bearings (azimuths) with the use of minimum two spaced apart passive radars, and calculation of the coordinates of the sources of r.f. radiations by the triangulation method, determination of location is performed in three stages, in the first stage the posthorizon objects are searched and detected by the radiation of their radars at each passive radar, the radio engineering and time parameters of radar radiations are measured, the detected radars with posthorizon objects are identified by the radio engineering parameters of radiations and bearing, and continuous tracking of these objects is proceeded, the information on the objects located within the radio horizon obtained from each passive radar is eliminated, the working sector of angles is specified for guidance and tracking of the selected posthorizon object, in the second stage continuous tracking of one posthorizon object is performed at least by two passive radars, and the time of reception of each radar pulse of this object is fixed, in the third stage the period of scanning of this radar, the difference of the angles of radiation by the main radar beam of each passive radar and the range to the posthorizon object with due account made for the difference of the angles of radiation are determined by the bearings (azimuths) measured by the passive radar and the times of reception of each pulse of the tracked radar. The method is realized with the aid at least of two spaced apart passive radars, each of them has aerials of the channel of compensation of side and phone lobes, a narrow-band reflector-type aerial, series-connected noiseless radio-frequency amplifier, multichannel receiving device, device of primary information processing and measurement of carrier frequency, amplitude and time of reception of signals of the detected radar, device of static processing of information and measurement of the bearing, repetition period, duration of the train and repetition of the pulse trains and a device for calculation of the difference of the angle of radiation of the aerials of the passive radars by the detected radar.

EFFECT: reduced error of measurement of the coordinates of posthorizon sources of radio-frequency radiations.

3 cl, 5 dwg

FIELD: radio engineering, applicable in electromagnetic reconnaissance, radio navigation and radio detection and ranging for determination of the direction to the source of radiation or reflection of radio waves.

SUBSTANCE: the phase direction finder has two antennas, two receiving paths, three phase shifters, two phase detectors, two limiters, three adders, two modulus computation devices, subtracting device, amplifier, comparator, gate circuit and an oscillator.

EFFECT: enhanced accuracy of direction finding and excepted its dependence of the attitude of the object of direction-finding.

2 cl, 10 dwg

FIELD: radio engineering.

SUBSTANCE: device has the first, the second and the third receiving antennas, the first, the second and the third high frequency amplifiers, the first and the second heterodynes, the first, the second and the third mixers, the first, the second and the third multipliers, the first, the second, the third and the fourth narrowband filters, the first, the second and the third intermediate frequency amplifiers, frequency multiplier by two, the first, the second and the third phase detectors, the first and the second correlator units, the first, the second, the third and the fourth threshold units, the first, the second, the third and the fourth keys and unit for recording.

EFFECT: wide range of functional applications.

3 dwg

FIELD: the proposed mode and arrangement refer to the field of radio electronics and may be used for definition of position of sources of emitting complex signals.

SUBSTANCE: the phase direction finder realizing the proposed phase mode of direction finding, has receiving aerials, receivers and a supporting generator, an impulse generator, an electronic commutator, a phase changer on 90, a phase detector and an indicator, a heterodyne, a mixer, an amplifier of an intermediate frequency, multipliers and band filters and a line of delay.

EFFECT: elimination of antagonism between requirements to accuracy of measuring and unique angle reading at phase mode of direction finding of sources of emitting of complex signals.

2 cl, 2 dwg

FIELD: the invention refers to the field of radio technique and may be used in range-difference systems of definition of the position of the sources of radio emissions.

SUBSTANCE: the mode is based on measuring of two differences of distances Δr12 and Δr13 to two pairs of mobile supporting points {O1,O2}and {O1,O3 , } the coordinates ,j= 1,2,3 supporting points Oj in the moment of time of measuring of distances, then the vector of measured values is transformed into the vector of the coordinates of the three points F1,F2 and M belonging to a hyperbolina: the vector is stored and transmitted along the channels of transmitting information into the center of processing information for using it in quality of initial data at solution a range-difference navigational task; at that the points F1 and F2 defines the focuses of the hyperbolina if it is a hyperbola or an ellipse or a focus and its projection on a directrix if it is a parabola and the third point belongs to the hyperbolina in such a manner that the position of its project on the direct F1F2 defines the form of the curve of the second order.

EFFECT: decreases volume of stored and transmitted data.

5 dwg

FIELD: radio electronics, applicable for passive radio monitoring in multi-channel system designed for direction finding of several sources of radio emission simultaneously getting into the reception zone.

SUBSTANCE: expanded functional potentialities by way of direction finding in two planes of several sources of radio emission simultaneously getting into the reception zone.

EFFECT: expanded functional potentialities.

2 dwg

FIELD: finding coordinates of radio source.

SUBSTANCE: as planes of position of radio source the planes are used, which have line of position of radio source, which has to be crossing of two hyperbolic surfaces pf position corresponding to time-difference measurements. Method is based upon reception of signal of radio source by four aerials, on measurement of three differences in time of reception of radio source signal by aerials, which aerials form measuring bases, upon subsequent processing of results of measurements for calculation of values of parameters of position of radio source and for calculating coordinate of radio source as crossing point of three planes of position. Device for realization of the method has four aerials which aerials form three pairs of measuring bases, which bases are disposed in non-coincident planes, three calculators for calculating parameters of position of radio source, calculator of radio source coordinates made in form of unit for solving system of linear equations and indication unit.

EFFECT: precise measurement of linear coordinates of object.

2 cl, 8 dwg

FIELD: radio detection and ranging, radio navigation, applicable for determining the angular co-ordinates of the signal radiation source.

SUBSTANCE: the claimed method is realized with the aid of a device having three receiving derails, three receivers, two phase-meters, computer, adder and a recording unit connected in a definite way.

EFFECT: enhanced range of one-valued measurement of angles at a small length of the rough measuring base.

3 dwg

FIELD: proposed invention refers to radiolocation and may be used for definition of position and movement of sources of radiation of complex signals.

SUBSTANCE: achieved technical result of invention is increase of trustworthiness of reception of useful signals with a priori known carrier frequency and removal of ambiguity of direction finding by suppression false signals (interference) not interesting for radio control and coming from other directions. At that proposed arrangement has receiving antenna with circle diagram of radiation pattern , receiving antenna with cardioidic diagram of radiation pattern, block for control over diagram of radiation pattern, first and second receiving sets, division block, threshold block, former of control pulse, first and second keys, meter of frequency, memory block, block for comparison of codes, motor and register block.

EFFECT: increases trustworthiness of direction finding.

4 dwg

Up!