The phase finder

 

(57) Abstract:

The invention relates to the field of radio and can be used for determining the angular coordinates of the source of continuous harmonic signal. In the proposed invention achieved the following technical result: conducting an unambiguous measurement in the sector angles from before when the antenna diversity of the direction finder at a distance substantially greater than the working wavelength and with no loss of sensitivity of the direction finder, and thus excluded the possibility of significant errors when the effect of small noise and excluded systematic error arising due to the drift characteristics of the phase detectors. The invention consists in that the phase finder, containing the antenna-receiving channels, the demodulation unit, the logical processing unit to calculate the angle of arrival of the electromagnetic wave is not the length of the bases, and the difference of their lengths in the direction finder introduced an additional fourth antenna-receiving channel, the demodulation unit contains three high-adder, three high-myCitadel, six of the amplitude detectors, and the logical block signal processing SOS/P> The invention relates to the field of radio and can be used for determining the angular coordinates of the source of continuous harmonic signal.

Known dual-phase finder with two omnidirectional receiving antennas, the phase centers of which are spaced from each other by a distance h, called the base. This system is used to determine the angle describing the direction of the radiation source (see Fig. 2.9 on page 26 in [1]).

The outputs of the antennas of the radio signal through the resonance amplifiers (receivers) are connected to respective inputs of the phase meter, containing either only a phase detector (see Fig. of 2.9 in [1]) or phase detector and the phase shifter 90o(see Fig. 2.9 b in [1]). In the first case, the dependence of the output voltage of the phase detector angle is obtained an even function of the angle, and the sensitivity at low - low. In the second case, the dynamical behaviour is an odd function , and the sensitivity at low - the highest for this system. The precise definitions of angle in such a direction finder increases with the increase of the ratio of the base b to the wavelength of processed source (see page 27 in [1]. However, increasing the base causes uraemic angles, using the directional receiving antenna, beam width which does not exceed the size of the zone certainty (see Fig. 4.4 on page 168 in [2] ). As the use of more expensive narrow-beam antennas, and the narrowing of the sector review in many cases is not valid, then use other ways to overcome ambiguity.

Known stations closest to the technical essence is described in [3] a radio direction finder comprising three antenna-receiving channel block demodulation signal consisting of two phasers on the 90oand four phase detectors, and the logical block signal processing. The algorithm of operation of the direction finder uses to determine the angle of incidence of the wave front is not the length of the bases, and the difference of their lengths. The maximum length of the database is limited only by the design considerations, and the difference of their lengths is chosen depending on the desired size of the field of unambiguous measurements. The outputs of the antennas (Fig. 1 in [3]) are connected to the inputs of the respective receivers, and the output of the first receiver connected to the first inputs of the first and third phase detectors, the output of the second receiver is connected to the first inputs of the second and chewed which is connected to the second input of the first phase detector. The output of the third receiver connected to a second input of the fourth phase detector and the input of the second phase shifter, the output of which is connected to the second input of the second phase detector. The outputs of the phase detectors are connected to respective inputs of the logical block signal processing. Antenna installed on the same line, and the distance between the phase centers of the first and second antennas is selected any, in accordance with design considerations, and the distance between the phase centers of the second and third antennas is chosen smaller in size where is the wavelength,oset border sector uniqueness.

With this arrangement, the antennas described in the direction finder is achieved unambiguous measurement in the sector angles from before , and its discriminatory characteristic has the form of tangenziali.

However:

- due to the odd function of the tangent at finding targets at zero (main) bearing the signal level of the output signal is equal to zero, which leads to uncertainty when making decisions about the presence of the goals and growth of the probabilities of crossing targets and false alarms;

- analysis of the formulas for calculating tangence discriminatory specifications in [3] shows that cisleithania are in the boundary region; this is the cause of great steepness discriminatory specifications in the border region, which leads to significant measurement errors when adding to the denominator even small noises;

the drift characteristics of the phasers leads to systematic measurement errors.

The task of the invention to provide unambiguous measurements in a wide angle sector in the absence of uncertainty in case of presence of a target at zero bearing, the exclusion of significant errors when doing measurements in the edge region and the exclusion of systematic measurement errors associated with drift characteristics of the phasers.

The invention achieves the following technical result:

- unambiguous measurements are carried out in the sector angles from before when using antennas of any type, spaced apart by a distance substantially greater than the wavelength, and there is no uncertainty, when the target is at zero bearing;

- exclude the possibility of significant errors when the effect of small noise;

- there is no systematic error associated with the drift characteristics of the phasers.

Specified tehnicheskoy the outputs of the antennas are connected to the inputs of the respective receivers, block demodulation of the signal, the inputs of which are connected to the corresponding outputs of the receivers, the logical processing unit of the signal, the inputs of which are connected with the corresponding outputs of demodulation unit due to the fact that it is the difference of the lengths of the bases (b1-b3) is equal to where is the wavelength,o- boundary value sector of the measured angles and the length of the base b2is determined by the condition and put additional antenna priemnyi channel, and the output of the antenna optional antenna-receiving channel connected to the input of the corresponding receiver, and the block demodulation signal includes three adders, three vicites and six of the amplitude detectors, block of the logical signal processing consists of blocks forming the cosine and sine discriminatory characteristics, the output of the first receiver is connected to the first inputs of the first adder and the first myCitadel, the output of the second receiver is connected to the second inputs of the first adder and the first myCitadel, to the first inputs of the second adder and the second myCitadel, the output of the third receiver is connected to the second inputs of the second adder and the second myCitadel, the first input of the third adder and the third myCitadel, fourth of parentela connected to the corresponding input of the amplitude detector, while the coefficients of the transmission power of the second and third receivers twice the transmission ratios of the first and fourth receivers, the output of each detector is the output of the demodulation unit and connected to the corresponding inputs of the blocks forming the cosine and sine discriminatory characteristics, and the outputs of these blocks are the outputs of the direction finder.

The choice of database, based on specified conditions, use the block demodulation three adders, three vychitala, six of the amplitude detectors and introduction to the logical block of the signal processing blocks the formation of the cosine and sine discriminatory characteristics allowed us to obtain the output at which the signal is present at the presence of target zero bearing, to avoid significant error when the effect of small noise, eliminate the formation of systematic errors due to the drift characteristics of the phasers. As a result, one of the outputs of the direction finder discriminatory feature has a high slope and the other a high level, improved measurement accuracy.

To achieve the technical result according to p. 2 the formula of the invention it is proposed to perform bla, the comparator, the voltage divider, and the first and second inputs of both adders, Comparators and the second managed key connected to respective outputs of demodulation unit, the output of the first adder connected to the first input of the first controlled key, to the second input of which is connected the output of the second adder, and to the third input of the first managed key connected to the first comparator output, the second output of which is connected to the third input of the second controlled key, each of the outputs of both controlled switches connected to the respective input of the voltage divider, the output of the voltage divider is the first output signal and the block forming sine discriminatory characteristics, containing two myCitadel, two managed key, comparator, the voltage divider, and the first and second inputs of both vychitala, comparator and the second managed key connected to respective outputs of demodulation unit, the output of the first vicites connected to the first input of the first controlled key, to the second input of which is connected the output of the second myCitadel, and to the third input of the first managed key connected to the first comparator output, the second output of which podkluchatsa the input of the voltage divider, and the output of the divider voltage is the second output signal.

The result is one of the discriminatory characteristics having high steepness, helps to ensure good measurement accuracy, and other characteristics, having at the same time a high level is likely to determine the presence or absence of the target.

The invention is illustrated graphics, where Fig. 1 shows a block diagram of the phase finder, and Fig. 2 is a structural block circuit diagram of the formation of the cosine discriminatory characteristics of Fig. 3 is a structural block circuit diagram of the formation of the sine discriminatory characteristics.

The phase finder contains the following elements (see Fig. 1): four antenna-receiving channel containing four antennas 1, 2, 3, 4 and four receivers 5, 6, 7, 8; a demodulation unit that contains three high-adder 9, 10, 11, three high-vicites 15, 16, 17, and six of the amplitude detectors 12, 13, 14, 18, 19, 20; the logical processing unit 35, containing the set of cosine discriminatory features 21 and the shaping unit sine discriminatory characteristics 22. The outputs of the antennas 1, 2, 3, 4 connected Matara 9 and the first input of the first vicites 15. The output of the second receiver 6 is connected to the second input of the first adder 9, the second input of the first vicites 15, to the first input of the second adder 10 and to the first input of the second vicites 16. The output of the third receiver 7 is connected with the second input of the second adder 10, with the second input of the second vicites 16, with the first input of the third adder 11 and to the first input of the third vicites 17. The optional fourth output of the receiver 8 is connected to a second input of the third adder 11 and the second input of the third vicites 17. The output of each of adders and vychitala connected to the corresponding input of one of the amplitude detectors 12, 13, 14, 18, 19,20. The output of each of the amplitude detector 12, 13, 14, 18, 19, 20 connected to the corresponding inputs of the blocks forming the sine and cosine discriminatory characteristics, and the outputs of these blocks are the outputs of the direction finder.

Design features of the proposed direction finder are as follows. Antenna 1, 2, 3, 4 are mounted on one line, so that the axis of symmetry of their chart orientation was perpendicular to the line installation, the length of the base b1select any, based on design considerations, the dierence of the lengths of the bases (b1-b32is determined by the condition that the Minimum length of a database is limited by the condition of the lowest specified distortion characteristics of the antennas and is or tens of wavelengths, the maximum length is practically unlimited, as the incoming wave front can be considered locally flat. The receivers 5 and 8 are identical; the receivers 6 and 7 are also identical. Due to the fact that the output of the receivers 6 and 7 are loaded into the four elements, and the output of the receiver 5 and 8 - two, the ratio of the power receivers 6 and 7, two times more than the receivers 5 and 8. When the design is developed for operation in the microwave range frequency adder 9 and myCitadel 15 can be combined in a single structural node on the basis of the ring waveguide bridge (pages 264, 265 in [4]). Similarly can be constructed of a pair of adders and vychitala 10 and 16, 11 and 17.

The shaping unit cosine discriminatory characteristics 21 (Fig. 2) contains the following elements: low-frequency adders stress 23, 24; comparator absolute values 26; managed on-off keys 25, 28; the voltage divider 27. The first input of the first adder 23 is connected to the output of the amplitude detector 12. The second input of the first amount is odnogo detector 18. The second input of the second adder 24 is connected to the output of the amplitude detector 20. The first input of the comparator 26 is connected to the output of the amplitude detector 13. The second input of the comparator 26 is connected to the output of the amplitude detector 19. The first input 28.1 key 28 is connected to the output of the amplitude detector 13. The second input 28.2 key 28 is connected to the output of the amplitude detector 19. The output of the adder 23 is connected to the first input 25.1 first key 25. The output of the adder 24 is connected to the second input 25.2 key 25. The output of comparator 26 is connected with the third (control) inputs and 25.3 28.3 keys 25 and 28. The output of the key 25 is connected to the input of the divider 27, intended for the dividend voltage (x), and the output of the key 28 is connected to the input of the divider 27, intended for the supply voltage, which is the division (y). Thus, at the output of divider 27 is obtained the ratio of the Keys 25, 28 and the comparator 26 are configured so that when the module output voltage of the amplitude detector 13 is greater than or equal to the output voltage of the amplitude detector 19, the output of comparator 26 on the control inputs and 25.3 28.3 keys 25 and 28 receives the voltage at which the outputs of the keys are connected with the corresponding terminals with index 1 (the corresponding is responsible and 25.2 28.2).

The shaping unit sine discriminatory specifications 22 (Fig. 2) contains the following elements: low-frequency myCitadel stresses 29, 30; comparator absolute values 32; managed on-off keys 31, 34; the voltage divider 33. The first input of the first vicites 29 is connected to the output of the amplitude detector 12. The second (inverting) input of the first vicites 29 is connected to the output of the amplitude detector 14. The first (inverting) input of the second vicites 30 is connected to the output of the amplitude detector 18. The second input of the second vicites 30 is connected to the output of the amplitude detector 20. The first input of the comparator 32 is connected to the output of the amplitude detector 13. The second input of the comparator 32 is connected to the output of the amplitude detector 19. The first input 34.1 key 34 is connected to the output of the amplitude detector 13. The second input 34.2 key 34 is connected to the output of the amplitude detector 19. The output of vicites 29 connected to the first input 31.1 first key 25. The output of vicites 30 is connected to the second input 31.2 key 31. The output of comparator 32 is connected to control inputs and 31.3 34.3 keys 31 and 34. The output of the key 31 is connected to the input of the divider 33, intended for the dividend voltage (x), and the output of the key 34 is connected to the input of the divider 33, before poluchaetsya the ratio of the Keys 31, 34 and the comparator 32 are configured so that when the module output voltage of the amplitude detector 13 is greater than or equal to the output voltage of the amplitude detector 19, the output of comparator 32 on the control inputs and 31.3 34.3 keys 31, 34 receives the voltage at which the outputs of the keys are connected with the corresponding terminals having the value 1 (respectively 31.1 and 34.1). Otherwise, the outputs of the keys are connected with the corresponding terminals with index 2 (respectively and 31.2 34.2).

Features of the Comparators 26, 33 is that they first define the modules submitted for their input voltages, and then compares these modules with each other. The comparison module voltages is due to the fact that at the input of the comparison circuit (see [5], page 287) is a diode bridge. Schematic included in blocks 21, 22 elements can be implemented using well-known principles and technical means (see pages 43, 131-132 in [6]).

The finder works as follows. By the action of the antennas 1, 2, 3, 4 of a plane electromagnetic wave arriving at an angle to the normal line relative to the line location of the antennas on the outputs of the receivers 5, 6, 7, 8 are formed are appropriate to the see Fig. 1). These voltages are fed to the inputs of the high-frequency adders 9, 10, 11 and the high-frequency vychitala 15, 16, 17, and the voltage U5is fed to the inverting input of vicites 15, the voltage U6served on the non-inverting input of vicites 15 and to the inverting input of vicites 16, the voltage U7served on the non-inverting input of vicites 16 and to the inverting input of vicites 17, the voltage U8served on the non-inverting input of vicites 17. As a result, the voltage (with known trigonometric transformations and the parity function of cosine)

< / BR>
Given that the wave number where is the wavelength at the outputs of the amplitude detectors 12, 13, 14, 18, 19, 20 are formed corresponding voltage

< / BR>
The gain of the receiving channel is formed in such a way that the voltage U0in the written formulas is the same.

The required unambiguous cosine of the direction-finding characteristic of Fc() can be obtained if you use the following processing algorithms voltages U12U13U14U18U19U20:

< / BR>
< / BR>
moreover, by virtue of trigonometric ratios of F1c() F2c().

In the unit the definition of F1c(), and in the adder 24 to the numerator to determine the F2c(). In the comparator 26 logical processing unit 21 is determined and compared between the modules of the output voltage amplitude detector 13 and 19, are compared with each other, the modules of the denominators when calculating If the module is the denominator in the formula (5) is greater than or equal to the denominator in the formula (6), the output of comparator 26 on the control inputs and 25.3 28.3 keys 25 and 28 receives the voltage at which the outputs of the keys are connected with the respective terminals with the index 1. In the voltage divider 27 is calculated dynamical characteristics according to the formula (5). If the module of the denominator of formula (5) is smaller than the modulus of the denominator of formula (6), the outputs of keys 25, 28 to the control signal of the comparator 26 are connected with the respective terminals with the index 2. In this case, the direction-finding characteristic in the voltage divider 27 is calculated in accordance with formula (6). Thus it is possible to eliminate the ambiguity of measurements that could occur due to the use of databases that are larger than the working wavelength, and eliminates the uncertainty of the type encountered when using only one formula (5) or Toamasina feature

< / BR>
The required unambiguous sine of the direction-finding characteristic of Fs() can be obtained if you use the following processing algorithms voltages U12U13U14U18U19U20:

< / BR>
< / BR>
moreover, by virtue of trigonometric ratios of F1s() F2s().

In block formation sine discriminatory specifications 22 (Fig. 3) myCitadel 29 calculates the numerator to determine the F1s() and myCitadel 30 - numerator for determining F2s(). In the comparator 32 logical processing unit 22 is determined and compared between the modules of the output voltage amplitude detector 13 and 19, are compared with each other, the modules of the denominators when calculating1s() and F2s(). If the module is the denominator in the formula (9) is greater than or equal to the denominator in the formula (10), the output of comparator 32 on the control inputs and 31.3 34.3 keys 31 and 34 receives the voltage at which the outputs of the keys are connected with the respective terminals with the index 1. In the voltage divider 33 is calculated dynamical characteristics according to the formula (9). If the module of the denominator of formula (9) is smaller than the modulus of the denominator of formula (10), the outputs of the keys 31, 34 HR is langalanga characteristic in the voltage divider 33 is calculated in accordance with formula (10). Thus it is possible to eliminate the ambiguity of measurements that could occur due to the use of databases that are larger than the working wavelength, and eliminates the uncertainty of the type encountered when using only one formula (9) or only one of formula (10). In the end, at the output of the voltage divider 33, according to the algorithm

< / BR>
formed dynamical characteristics

< / BR>
The difference between the bases b = (b1-b3) is determined by the value of the sector of angles to be measured: the length of the base b2is selected If you select the scale of the direction finder will be unique within the Thus, despite the fact that the ambiguous, the output logical processing blocks 21 and 22 are formed unambiguous scales in a wide angle sector and there is no loss of sensitivity signal when the target is at zero bearing. As in formulas (5) and (6), (9) and (10) the denominators are in quadrature with respect to each other, it eliminates the divide-by values close to zero that it is not possible to form a significant measurement errors when exposed to small noise in the denominator.

In the proposed invention achieved the following technical result: the e, substantially higher than the working wavelength and with no loss of sensitivity of the direction finder, and thus excluded the possibility of significant errors when the effect of small noise and excluded systematic error arising due to the drift characteristics of the phase detectors.

Sources of information

1. Lezin Y. C. introduction to theory and technique of radio systems: Textbook. manual for schools. - M.: Radio and communication, 1986.

2. Sibel A., fundamentals of radar. - M.: Owls. radio, 1961.

3. Patent N 2138061 (RF) Phase finder. // Bespalov E. C., margin centuries - BI N 26, 1999.

4. Cry C. M. Design of microwave devices for radar receivers. - M., "Sov. radio, 1973.

5. Titze U., Schenk, K. Semiconductor circuitry. - M.: Mir, 1983.

6. Gutnikov B. C. Integral electronics in the measuring devices. - L.: Energoatomizdat, 1988.

1. The phase finder, containing three antenna-receiving channel in which the outputs of the antennas are connected to the inputs of the respective receivers, block demodulation of the signal, the inputs of which are connected to the corresponding outputs of the receivers, the logical processing unit of the signal, the inputs of which compounds>) is equal to where is the wavelength,o- boundary value sector of the measured angles and the length of the base b2is determined by the condition and put additional antenna-receiving channel, and the output of the antenna optional antenna-receiving channel connected to the input of the corresponding receiver, and the block demodulation signal includes three adders, three vicites and six of the amplitude detectors, block of the logical signal processing consists of blocks forming the cosine and sine discriminatory characteristics, the output of the first receiver is connected to the first inputs of the first adder and the first myCitadel, the output of the second receiver is connected to the second inputs of the first adder and the first myCitadel, to the first inputs of the second adder and the second myCitadel, the output of the third receiver is connected to the second inputs of the second adder and the second myCitadel, the first input of the third adder and the third myCitadel, the output of the fourth receiver is connected to the second input of the third adder and the third myCitadel, the output of each of adders and vychitala connected to the corresponding input of the amplitude detector, and the coefficients of the transmission power of the second and third receivers twice the block demodulation and connected to the corresponding inputs of the blocks forming the cosine and sine discriminatory characteristics, and the outputs of these blocks are the outputs of the direction finder.

2. The phase finder under item 1, characterized in that the shaping unit cosine discriminatory characteristics contains two adders, two managed key, comparator, the voltage divider, and the first and second inputs of both adders, Comparators and the second managed key connected to respective outputs of demodulation unit, the output of the first adder connected to the first input of the first controlled key, to the second input of which is connected the output of the second adder, and to the third input of the first managed key connected to the first comparator output, the second output of which is connected to the third input of the second controlled key each of the outputs of both controlled switches connected to the respective input of the voltage divider, the output of the voltage divider, is the first output signal and the block forming sine discriminatory characteristics contains two myCitadel, two managed key, comparator, the voltage divider, and the first and second inputs of both vychitala, comparator and the second managed key connected to respective outputs of demodulation unit, the output of the first vicites on the which of myCitadel, and to the third input of the first managed key connected to the first comparator output, the second output of which is connected to the third input of the second controlled key, each of the outputs of both controlled switches connected to the respective input of the voltage divider, and the output of the divider voltage is the second output signal.

 

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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

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