Antenna

FIELD: antenna.

SUBSTANCE: antenna (100) includes antenna layer (1), connecting layer (2) and feeder circuit layer (10). Antenna layer (1) includes horn antennae (51-53). Horn antennae (51, 52) are arranged so, that their centers are aligned in direction (C). Horn antenna (53) is arranged so, that horn antenna (53) lies separately from horn antenna (51) in direction (D), and centers of horn antennae (51) and (53) are not aligned in direction (D).

EFFECT: waveguide is formed in connecting layer (2).

7 cl, 7 dwg

 



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: antenna post for radio relay station comprises: a base made of steel in form of a base plate, a telescopic mast shaft consisting of one fixed section and four movable sections made from duralumin tubes of different diameter, a latch and a reading scale on the base plate, a cross-over winch built into the fixed section, having a drive and a double steel cable wounds on its drum, revolving rings with three lugs made in the top part of the fixed section and each of the four movable sections, a cantilever beam mounted at the top of the fourth movable section, the cantilever beam being fitted with an antenna unit having two antennae, a telescopic mast mounting consisting of six winches, on the axis of each of which there are two drums isolated from each other, on each of which is wound a steel cable of the corresponding guy-wire, six steel poles hammered into the ground at a small angle, on each of which is mounted the corresponding winch; a feeder cable, which is connected through the antenna unit to the first and second antennae, is mounted on the shaft of the mast by braces.

EFFECT: providing stable operation of the device in different climatic conditions and shorter time for unfolding the mast.

3 cl, 1 dwg

FIELD: physics.

SUBSTANCE: invention refers to antenna engineering and can be used for production, at manufacturing plants, of dipole, phased or digital arrays (A) for signal reception/transfer within VHF range with various polarisation within wide single-beam scanning sector, that is in production period and cost, less by a factor of ten than production of conventional large-dimensioned arrays. The invention consists in that design of ready-to-operate array includes carrying submodule trusses whereon are fixed and galvanic ally coupled in either square or orthogonal curtain the identical prefabricated antenna modules representing vibrator arrays of coherent parameters, with orthogonal arms (cross-vibrators) inclined at an angle 45° to screen plane of single standard dimension-type, with arm length of horizontally polarised vibrator Lhor=0.463λo and vertically polarised vibrator Lvert. = 0.452λo, their height being equal h=0.226λo over conducting screen. Cross-vibrators are placed in array curtain along triangular mesh in the form of isosceles triangles with angularly placed vibrators, coordinate distances between their columns being dx=0.45λo and between their lines dy=0.32λo. Array is calibrated by experiment-calculated method with scattering matrix evaluation and VSWR calculation within its small fragment from 37 cross-vibrators of adjustable dimensions for fine adjustment until optimum dimension-type of required VSWR is attained. To provide ready-to-assembly array in-site in short terms, fit-up and adjustment of array curtain is carried out at a manufacturing plant.

EFFECT: extended scanning sector with matching of completely built-up array within whole scan sector up to ±60° at considerably reduced of time of array calibration and its setting into operation.

5 cl, 4 dwg

FIELD: microwave radio engineering; radars.

SUBSTANCE: proposed antenna array incorporating power splitters and array of waveguide-slot stripline radiators (strips) has its power splitter made in the form of two boards; it has slow-wave structure in the form of E-plane folded serpentine waveguide and members providing coupling with strips. Coupling members are essentially coupling windows and matching projections. Coupling windows are made in waveguide narrow wall of one power splitter plate and matching projections, against coupling members on other waveguide narrow wall of other power splitter plate. Power splitter longitudinal axes incorporating even- and odd-numbered strip coupling members are spaced apart through integer number of quarter-wavelengths in power splitter waveguide. Each strip is essentially rectangular waveguide whose narrow wall has alternately inclined slots. Even-numbered strips have their slots inclined in specular direction relative to that of odd-numbered strip slots and difference in lengths of even- and odd-numbered strips equals amount of displacement of power splitter longitudinal axes.

EFFECT: reduced side-lobe level and standing-wave voltage ratio at normal-frequency power splitter input, amplifier gain, directive gain, and antenna sheet utilization factor.

6 cl, 2 dwg

FIELD: microwave radio engineering, route surveillance radars.

SUBSTANCE: proposed antenna arrangement incorporating power splitters and array of waveguide-slot stripline radiators (strips) has its power splitter disposed in plane parallel to that incorporating strips; it is made in the form of E-plane folded serpentine waveguide that has coupling members with strips. Power splitter longitudinal axes incorporating even- and odd-numbered coupling members with strips are spaced apart through integer odd number of quarter-wavelength in power splitter waveguide. Power splitter waveguide line section between adjacent coupling members is twice bent through 180 deg. and its length is chosen to be a multiple of integer odd number of half-waves in power splitter waveguide. Even- and odd-numbered strips are different in length. Half-wave phasing section affording phase shift required for matching even- and odd-numbered outputs of power splitter is inserted in input section of each strip by changing size of strip waveguide wide wall.

EFFECT: reduced level of side lobes, standing-wave voltage ratio at normal-frequency power splitter input, enhanced amplifier gain, directive gain, and antenna sheet surface utilization factor.

4 cl, 3 dwg

FIELD: antenna engineering.

SUBSTANCE: proposed device has radio-transparent insulating layer and helical components forming lattice structure which are equally spaced apart therein. Axes of all helical components are positioned unidirectionally and lie in insulating layer plane; axis and ends of each helical component form plane perpendicular to direction of reflected wave propagation. Each helical component has following characteristics: Nt turns and helix pitch angle α found from formula where α is angle of helix pitch angle; Nt is turn number of helical component. Length of conductor forming helical component equals half the length of electromagnetic wave.

EFFECT: ability of transforming linearly polarized electromagnetic wave into circularly polarized wave irrespective of plane position of incident linearly polarized electromagnetic wave at desired direction of incident wave propagation.

3 cl, 4 dwg

FIELD: short-range radio communication and radar systems.

SUBSTANCE: proposed method includes storage of electric field potential by means of storage capacitor, avalanche discharge of storage capacitor, reception and radiation of electromagnetic wave by means of receiving-radiating element, concurrent generation, transmission, and radiation of pulsed signals. Electric field potential is stored by storage capacitor simultaneously with its storage at receiver input from current waves formed by pulses of receiving electromagnetic wave across two separated conductors of transceiving element; avalanche discharge of storage capacitor is conducted simultaneously with generation of current waves in same conductors producing radiated electromagnetic wave pulse. Device implementing proposed method has sawtooth current pulse generator connected to storage capacitor, avalanche diode, receiving-radiating element, and receiver. Receiving-radiating element is made in the form of two separated conductors shorted out on one end; they are series-connected with avalanche diode and storage capacitor at input and parallel-connected with receiver input through controlled limiter.

EFFECT: enhanced antenna efficiency and gain, as well as noise immunity, reduced power loss.

4 cl, 2 dwg

FIELD: radio engineering; radio direction finding and radio communication systems.

SUBSTANCE: proposed highly directive annular phased antenna array has N identical nondirectional antennas, N-channel controlled phase shifter, and adder. Array antennas are equidistantly disposed over circumference with radius R0 affording short admissible width of synthesized directivity pattern main lobe at maximal operating-band wavelength and at equal angular pitch relative to array center. Number of antennas is chosen from formula N = 4l + 2, where l =1, 2, 3, ... are integer numbers other than zero. Distances chosen between array center and phase centers of antennas compared with radius R for array antennas bearing odd sequence numbers are enhanced and for array antennas bearing even sequence numbers, reduced.

EFFECT: reduced level of synthesized directivity pattern side lobes, in average twice as broad operating band of antenna array.

1 cl, 30 dwg, 2 tbl

FIELD: the invention refers to the field of radio technique namely to antenna technique.

SUBSTANCE: it may be used at designing antenna arrays for communication systems, location and electronic warfare. The technical result is in increasing the coefficient of efficiency of an antenna, range of action and efficiency of a radio system due to providing possibility of excitation of electromagnetic field in the shape of a bi -polar ultra short impulse signal that increases directivity of an antenna array. According to the proposed technical solutions an informative signal is transformed into an electromagnetic field in transmission lines and received electromagnetic field is divided along n horn oscillators with a tone-modulated electro magnetic wave antenna array. After division of the electromagnetic field along horn oscillators one part of the unipolar monoimpulse electromagnetic field is delayed in time for the half of the duration of the informative signal, the phase of this part of the electromagnetic field is transformed on the opposite and is interfered with the other part of the electromagnetic field. The wide-band antenna array for execution of the mentioned mode has an excitation system on n outputs and connected with it a radiating aperture fulfilled out of n horn oscillators with tone-modulated electromagnetic wave.

EFFECT: increases coefficient of efficiency.

4 cl, 7 dwg

FIELD: antenna engineering, possible usage as receiving antennas in radio broadcasting, radio communications and radio direction finding.

SUBSTANCE: antennas consist of working electrode, connected to input of antenna amplifier, isolated compensating electrode, connected to additional output of amplifier and positioned between working electrode and counterweight. On compensating electrode, signal transfer coefficient close to one in terms of voltage is provided for relatively to working electrode. Various elements of surface shape may be used as working electrode. Antenna array consists of N≥1 pairs, working electrodes of which are connected to inputs of amplifiers, and compensating electrodes - in crisscross manner and mutually are connected to additional outputs of amplifiers of pair. On these outputs, signal transfer coefficient by voltage relatively to working electrode close to one is enforced.

EFFECT: high frequency receipt mode, high efficiency of antenna array.

3 cl, 5 dwg

FIELD: microwave radio engineering; radar frequency-controlled antennas.

SUBSTANCE: proposed antenna is made in the form of flat array of linear radiators connected to power splitter in the form of sine-wave configured line. Components coupling power splitter with linear radiators are divided at antenna input into two groups so that longitudinal axis incorporating all even-numbered coupling members is offset relative to axis incorporating all odd-numbered coupling members by integer odd number of quarter-wavelengths in sine-wave line of power splitter. Phase mismatch occurring in this case is compensated for by respective difference in input section lengths of even- and odd-numbered linear radiators.

EFFECT: reduced space requirement, improved matching and performance characteristics of antenna and radar as a whole.

2 cl, 2 dwg

FIELD: microband microwave arrays for use in radars, microwave imagers, medical apparatuses, information receiving and transmitting systems.

SUBSTANCE: the radiators are positioned in the points of the hexagonal grid with a horizontal pitch determined by the required band of absence of the combination lobes in the directivity pattern, antiphase exciting elements of orthogonal linear polarizations are connected to the plate in antiphase on the orthogonal diagonals of the square.

EFFECT: reduced level cross-polarized components of the signal induced at polarizationally orthogonal outputs of the array for the band of electronic scanning exceeding +-45 deg.

3 dwg

FIELD: microwave radio engineering; radar frequency-controlled antennas.

SUBSTANCE: proposed antenna is made in the form of flat array of linear radiators connected to power splitter in the form of sine-wave configured line. Components coupling power splitter with linear radiators are divided at antenna input into two groups so that longitudinal axis incorporating all even-numbered coupling members is offset relative to axis incorporating all odd-numbered coupling members by integer odd number of quarter-wavelengths in sine-wave line of power splitter. Phase mismatch occurring in this case is compensated for by respective difference in input section lengths of even- and odd-numbered linear radiators.

EFFECT: reduced space requirement, improved matching and performance characteristics of antenna and radar as a whole.

2 cl, 2 dwg

FIELD: antenna engineering, possible usage as receiving antennas in radio broadcasting, radio communications and radio direction finding.

SUBSTANCE: antennas consist of working electrode, connected to input of antenna amplifier, isolated compensating electrode, connected to additional output of amplifier and positioned between working electrode and counterweight. On compensating electrode, signal transfer coefficient close to one in terms of voltage is provided for relatively to working electrode. Various elements of surface shape may be used as working electrode. Antenna array consists of N≥1 pairs, working electrodes of which are connected to inputs of amplifiers, and compensating electrodes - in crisscross manner and mutually are connected to additional outputs of amplifiers of pair. On these outputs, signal transfer coefficient by voltage relatively to working electrode close to one is enforced.

EFFECT: high frequency receipt mode, high efficiency of antenna array.

3 cl, 5 dwg

FIELD: the invention refers to the field of radio technique namely to antenna technique.

SUBSTANCE: it may be used at designing antenna arrays for communication systems, location and electronic warfare. The technical result is in increasing the coefficient of efficiency of an antenna, range of action and efficiency of a radio system due to providing possibility of excitation of electromagnetic field in the shape of a bi -polar ultra short impulse signal that increases directivity of an antenna array. According to the proposed technical solutions an informative signal is transformed into an electromagnetic field in transmission lines and received electromagnetic field is divided along n horn oscillators with a tone-modulated electro magnetic wave antenna array. After division of the electromagnetic field along horn oscillators one part of the unipolar monoimpulse electromagnetic field is delayed in time for the half of the duration of the informative signal, the phase of this part of the electromagnetic field is transformed on the opposite and is interfered with the other part of the electromagnetic field. The wide-band antenna array for execution of the mentioned mode has an excitation system on n outputs and connected with it a radiating aperture fulfilled out of n horn oscillators with tone-modulated electromagnetic wave.

EFFECT: increases coefficient of efficiency.

4 cl, 7 dwg

FIELD: radio engineering; radio direction finding and radio communication systems.

SUBSTANCE: proposed highly directive annular phased antenna array has N identical nondirectional antennas, N-channel controlled phase shifter, and adder. Array antennas are equidistantly disposed over circumference with radius R0 affording short admissible width of synthesized directivity pattern main lobe at maximal operating-band wavelength and at equal angular pitch relative to array center. Number of antennas is chosen from formula N = 4l + 2, where l =1, 2, 3, ... are integer numbers other than zero. Distances chosen between array center and phase centers of antennas compared with radius R for array antennas bearing odd sequence numbers are enhanced and for array antennas bearing even sequence numbers, reduced.

EFFECT: reduced level of synthesized directivity pattern side lobes, in average twice as broad operating band of antenna array.

1 cl, 30 dwg, 2 tbl

FIELD: short-range radio communication and radar systems.

SUBSTANCE: proposed method includes storage of electric field potential by means of storage capacitor, avalanche discharge of storage capacitor, reception and radiation of electromagnetic wave by means of receiving-radiating element, concurrent generation, transmission, and radiation of pulsed signals. Electric field potential is stored by storage capacitor simultaneously with its storage at receiver input from current waves formed by pulses of receiving electromagnetic wave across two separated conductors of transceiving element; avalanche discharge of storage capacitor is conducted simultaneously with generation of current waves in same conductors producing radiated electromagnetic wave pulse. Device implementing proposed method has sawtooth current pulse generator connected to storage capacitor, avalanche diode, receiving-radiating element, and receiver. Receiving-radiating element is made in the form of two separated conductors shorted out on one end; they are series-connected with avalanche diode and storage capacitor at input and parallel-connected with receiver input through controlled limiter.

EFFECT: enhanced antenna efficiency and gain, as well as noise immunity, reduced power loss.

4 cl, 2 dwg

FIELD: antenna engineering.

SUBSTANCE: proposed device has radio-transparent insulating layer and helical components forming lattice structure which are equally spaced apart therein. Axes of all helical components are positioned unidirectionally and lie in insulating layer plane; axis and ends of each helical component form plane perpendicular to direction of reflected wave propagation. Each helical component has following characteristics: Nt turns and helix pitch angle α found from formula where α is angle of helix pitch angle; Nt is turn number of helical component. Length of conductor forming helical component equals half the length of electromagnetic wave.

EFFECT: ability of transforming linearly polarized electromagnetic wave into circularly polarized wave irrespective of plane position of incident linearly polarized electromagnetic wave at desired direction of incident wave propagation.

3 cl, 4 dwg

FIELD: microwave radio engineering, route surveillance radars.

SUBSTANCE: proposed antenna arrangement incorporating power splitters and array of waveguide-slot stripline radiators (strips) has its power splitter disposed in plane parallel to that incorporating strips; it is made in the form of E-plane folded serpentine waveguide that has coupling members with strips. Power splitter longitudinal axes incorporating even- and odd-numbered coupling members with strips are spaced apart through integer odd number of quarter-wavelength in power splitter waveguide. Power splitter waveguide line section between adjacent coupling members is twice bent through 180 deg. and its length is chosen to be a multiple of integer odd number of half-waves in power splitter waveguide. Even- and odd-numbered strips are different in length. Half-wave phasing section affording phase shift required for matching even- and odd-numbered outputs of power splitter is inserted in input section of each strip by changing size of strip waveguide wide wall.

EFFECT: reduced level of side lobes, standing-wave voltage ratio at normal-frequency power splitter input, enhanced amplifier gain, directive gain, and antenna sheet surface utilization factor.

4 cl, 3 dwg

FIELD: microwave radio engineering; radars.

SUBSTANCE: proposed antenna array incorporating power splitters and array of waveguide-slot stripline radiators (strips) has its power splitter made in the form of two boards; it has slow-wave structure in the form of E-plane folded serpentine waveguide and members providing coupling with strips. Coupling members are essentially coupling windows and matching projections. Coupling windows are made in waveguide narrow wall of one power splitter plate and matching projections, against coupling members on other waveguide narrow wall of other power splitter plate. Power splitter longitudinal axes incorporating even- and odd-numbered strip coupling members are spaced apart through integer number of quarter-wavelengths in power splitter waveguide. Each strip is essentially rectangular waveguide whose narrow wall has alternately inclined slots. Even-numbered strips have their slots inclined in specular direction relative to that of odd-numbered strip slots and difference in lengths of even- and odd-numbered strips equals amount of displacement of power splitter longitudinal axes.

EFFECT: reduced side-lobe level and standing-wave voltage ratio at normal-frequency power splitter input, amplifier gain, directive gain, and antenna sheet utilization factor.

6 cl, 2 dwg

FIELD: physics.

SUBSTANCE: invention refers to antenna engineering and can be used for production, at manufacturing plants, of dipole, phased or digital arrays (A) for signal reception/transfer within VHF range with various polarisation within wide single-beam scanning sector, that is in production period and cost, less by a factor of ten than production of conventional large-dimensioned arrays. The invention consists in that design of ready-to-operate array includes carrying submodule trusses whereon are fixed and galvanic ally coupled in either square or orthogonal curtain the identical prefabricated antenna modules representing vibrator arrays of coherent parameters, with orthogonal arms (cross-vibrators) inclined at an angle 45° to screen plane of single standard dimension-type, with arm length of horizontally polarised vibrator Lhor=0.463λo and vertically polarised vibrator Lvert. = 0.452λo, their height being equal h=0.226λo over conducting screen. Cross-vibrators are placed in array curtain along triangular mesh in the form of isosceles triangles with angularly placed vibrators, coordinate distances between their columns being dx=0.45λo and between their lines dy=0.32λo. Array is calibrated by experiment-calculated method with scattering matrix evaluation and VSWR calculation within its small fragment from 37 cross-vibrators of adjustable dimensions for fine adjustment until optimum dimension-type of required VSWR is attained. To provide ready-to-assembly array in-site in short terms, fit-up and adjustment of array curtain is carried out at a manufacturing plant.

EFFECT: extended scanning sector with matching of completely built-up array within whole scan sector up to ±60° at considerably reduced of time of array calibration and its setting into operation.

5 cl, 4 dwg

Up!