41 results about "Dipole array" patented technology

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

The invention relates to the technical field of antennas, in particular to a millimeter wave three-beam all-dielectric lens antenna, which comprises a group of 2 * 2 magnetoelectric dipole array antennas and an all-dielectric circular lens structure, the 2 * 2 magnetoelectric dipole array antenna is used as a feed source and is arranged on the plane side of the all-dielectric circular lens structure, and the feed source directly faces the geometric center of the all-dielectric circular lens structure; the all-dielectric circular lens structure has a direction-controllable three-beam radiation capability; through the reasonable medium structure layout, the multi-beam coverage and the frequency point adaptability are considered while high-gain output is ensured, and the contradiction between the performance and the practicability of the existing scheme is overcome.

The invention relates to the technical field of array radiation pattern synthesis, in particular to a linear array radiation pattern synthesis method and system based on hybrid optimization. The method comprises the following steps: obtaining dipole array optimization parameter data; initializing an array parameter and an FGO population according to the acquired data; constructing a KAN proxy model and training the model by using an FGO population; performing hybrid iterative optimization on the KAN proxy model fused with the FGO; and performing array antenna pattern synthesis by using the optimized KAN proxy model. According to the probability hybrid evaluation strategy based on the KAN proxy model, through the whole FGO iteration process, low-potential candidate solutions are effectively screened out by dynamically allocating accurate electromagnetic simulation resources (such as high-proportion proxy evaluation in the initial stage and gradually-increased accurate verification in the later stage), and the calling frequency of a high-cost moment method is remarkably reduced.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

The invention discloses a wave-absorbing metasurface low-profile wide-angle RCS (radar cross section) reduction tight coupling dipole antenna. The array is composed of a radiation layer, a middle layer, a wave-absorbing metasurface layer and a metal ground layer. The top layer of the radiation layer is a dipole antenna, and the tail ends of radiation arms of the dipole antenna are loaded with coupling patches through metal through holes; the middle layer is a dielectric substrate; the top layer of the wave-absorbing metasurface layer is a pair of symmetrical trident-shaped resistive films loaded with metal through holes, and the bottom layer of the wave-absorbing metasurface layer is a dielectric substrate; the metal ground layer is located at the lowermost layer. According to the invention, the wave-absorbing metasurface is embedded in the tight coupling dipole array antenna to replace a traditional metal ground, so that a low-profile structure is realized. According to the antenna, within the frequency band of 7-14 GHz, the wave absorbing efficiency is higher than 75% when electromagnetic waves are incident at the wide angle of 0-60 degrees, meanwhile, good radiation performance and wide-angle scanning capacity are kept, and the radar cross section is remarkably reduced. The method can be popularized to the low radar cross section design of a traditional antenna, and is suitable for radar and wireless communication systems.

The present invention relates to the field of dipole source construction, and more specifically to a dipole source construction method and computer device based on finding a minimum impedance path. The method includes: determining the composition of a dipole model based on the radiation of a PCB noise source based on multi-level expansion theory, calculating the dipole magnetic field based on the mirror principle and superposition theorem; calculating the initial value of a uniformly distributed dipole array based on the relationship between the distance between the observation point and the radiation source and the magnetic field intensity, and the near-field scanning result; calculating the impedance of the dipole array based on the negative correlation between impedance and current and the positive correlation between dipole moment and current magnitude, and finding the dipole minimum impedance path based on the average distance norm and an improved minimum path algorithm; using a differential evolution algorithm to optimize the amplitude of the dipoles that constitute the minimum impedance path, and evaluating the accuracy of the dipole equivalent source construction. The present invention is suitable for constructing a simplified equivalent radiation source model for a PCB.

This invention discloses a design method and structure for a half-mode dielectric ridge parallel plate waveguide dual-beam wide-angle scanning leaky antenna based on PCB technology. Manufactured using a fully printed circuit board process, it includes a core structure of a half-mode dielectric ridge parallel plate waveguide transmission line formed by laminating three dielectric substrates, a metallized via array disposed at the edge of the waveguide's non-radiating open aperture to suppress energy leakage, and a periodic dipole array symmetrically arranged on the radiating open aperture side of the waveguide. This invention solves the technical problems of high manufacturing cost, narrow scanning range, and difficulty in implementing dual beams in traditional leaky antennas, providing a low-cost, high-performance, and easily integrated antenna solution.

The invention relates to an antenna device (102) comprising a low-frequency array (104) of low-frequency dipoles (112) having respective centres (112c) aligned on a so-called vertical axis (A1); a high-frequency array (106) of high-frequency dipoles (114) having respective centres (114c) following one another vertically; and a support (115) for the low-frequency dipoles (112) and the high-frequency dipoles (114). The device is characterised in that the high-frequency dipoles (114) are arranged so that the centre (112c) of each low-frequency dipole (112) is positioned vertically between the centres (114c) of a pair (P1; P2) of two high-frequency dipoles (114).

This invention discloses a dual-polarized magnetoelectric dipole array antenna. The array antenna consists of antenna elements and a supporting structure. Multiple antenna elements are arrayed within the supporting structure. Each antenna element includes a radiating structure and a feeding structure. The radiating structure is a multi-layer structure with feeding structures arranged between its layers. The feeding structure employs dual-polarized microstrip feed lines. One side of each of the two microstrip feed lines is bridging and cross-laid on the lower surface of the bottom layer of the radiating structure. The feeding structure also includes two orthogonally arranged H-shaped coupling slots, which are arranged on the upper surface of the bottom layer of the radiating structure. This invention achieves ±45° dual-polarization through H-shaped slot coupling feeding and uses a slot coupling feeding and dual-polarized feed line co-layer design, compressing the antenna profile to 0.12λ0. The operating frequency band covers 3.2–5.36 GHz, the array antenna gain is better than 8 dBi, and the dual-polarization port isolation is better than 23 dB. It can simultaneously meet the requirements of the n78 and n79 frequency bands in 5G communication and is suitable for low-cost, miniaturized 5G base station equipment.

The utility model discloses a dual-polarization printing umbrella-shaped dipole array antenna, which comprises a reflecting plate, a plurality of umbrella-shaped dipole antenna units and a feed network PCB (printed circuit board), and is characterized in that a plurality of cross-shaped grooves are formed in the reflecting plate; each umbrella-shaped dipole antenna unit comprises a first radiation unit and a second radiation unit, the first radiation unit is inserted on the second radiation unit, and the first radiation unit and the second radiation unit are orthogonally engaged; the first radiation unit and the second radiation unit are inserted into the cross-shaped groove; and the second radiation unit of each umbrella-shaped dipole antenna unit and the feed network PCB are integrally designed. According to the umbrella-shaped dipole array antenna, the first window is arranged on the first radiation unit, the second window is arranged on the feed network PCB, the feed microstrip is in butt joint with the feed point of the first radiation unit in structure, batch installation and positioning of the radiation units are realized through welding, and the assembling process of the umbrella-shaped dipole array antenna is greatly simplified.

The invention provides a ground station broadband magnetoelectric dipole array antenna. The ground station broadband magnetoelectric dipole array antenna comprises a magnetoelectric dipole array, a power division network substrate and a power division feed network. On the basis of the scheme, the magnetoelectric dipole array is connected with the power division feed network through the metalized via holes embedded in the power division network substrate. The magnetoelectric dipole array is placed on the upper layer of the power division network substrate, and the power division feed network is printed on the lower layer of the power division network substrate. On the basis of the scheme, the magnetoelectric dipole array is composed of 32 magnetoelectric dipole antenna units, the 32 magnetoelectric dipole antenna units are arranged according to a 4 * 8 arrangement mode, and the size of the whole array plane is 480 mm * 960 mm * 55.1 mm. On the basis of the scheme, each magnetoelectric dipole antenna unit comprises two pairs of magnetoelectric dipole arms, an eta-shaped feed probe and a folding reflecting plate. The antenna is low in cost and easy to process, and can be widely applied to a long-distance ground station communication system.

The invention discloses a broadband electromagnetic dipole antenna based on an X-shaped polarization conversion metasurface, and belongs to the technical field of electromagnetic dipole antennas. In order to solve the problems that an existing metamaterial wave absorber RCS is narrow in reduction bandwidth, an RCS antenna of a PCM chessboard structure is concentrated at the frequency band below 20 GHz and the like, the electromagnetic dipole antenna combines a 1 * 8 electromagnetic dipole array with the PCM chessboard structure, and the RCS is minimized while high gain and wide frequency band are kept; by using the X-shaped PCM unit and the mirror image unit array thereof, cross polarization conversion of reflected waves is realized in a working frequency band, a 180-degree phase difference is generated, the PCM disperses back scattering energy to a surrounding area, and normal reflection is reduced, so that the RCS of the antenna is effectively reduced, and the RCS is reduced by more than 10 dB in 74.1% of bandwidth (19.07-41.52 GHz). The electromagnetic dipole antenna disclosed by the invention has the characteristics of high gain, wide bandwidth and low RCS (radar cross section), has a wide application prospect in the fields of high-frequency wireless communication and radar stealth, and shows huge potential of future development of a stealth technology.

The present invention relates to the technical field of radio frequency communications. Disclosed are a broadband two-dimensional eight-beam switchable annular magnetoelectric dipole array antenna and a design method therefor. The broadband two-dimensional eight-beam switchable annular magnetoelectric dipole array antenna comprises a first four-beam unit and a second four-beam unit which form an eight-beam array antenna; array antennas in the four-beam units are both located on a same horizontal plane and arranged on dielectric substrates, are both in a four-leaf clover shape and differ by 45°, two dielectric substrates are connected, and the bottoms of the dielectric substrates are provided with metal ground planes; shorting pins are provided at the top ends of leaves of the array antennas, and sequentially pass through the array antennas and the dielectric substrates to be connected to the metal ground planes; and coaxial inner conductor metal columns are provided at the junctions of the leaves of the array antennas, pass through the array antennas, the dielectric substrates and the metal ground planes, and are connected to feed ports. The present invention provides a beam switching antenna which is small, has a wider overlapping bandwidth during multi-beam switching, and has more switching states.

The invention provides a broadband wide-angle tight coupling dipole array antenna working at a Ka wave band. The broadband wide-angle tight coupling dipole array antenna is composed of a plurality of antenna units arranged in a matrix mode. Each unit comprises a single-layer Rogers 5880 dielectric substrate, a bottom-layer metal floor, an upper-layer wide-angle matching layer and a tight dipole radiation layer; wherein the tail ends of vibration arms of the bow-tie-type dipole units are mutually overlapped to enhance coupling, the hyperbolic impedance transformers realize conversion from unbalance to balance and broadband matching, the short-circuit metal wires inhibit common-mode resonance, and the wide-angle matching layer is a frequency selective surface formed by rectangular metal patches. Passive edge units are additionally arranged on the two sides of the array, outer side short-circuit lines are removed to slow down the truncation effect, the metal wall and the floor are integrally machined, the active standing-wave ratio within 27.5-35 GHz is smaller than or equal to 2.1 when + / -50-degree scanning is supported, and the efficiency is larger than or equal to 80%. The antenna has the advantages of low profile, high integration, wide bandwidth angle and high radiation efficiency, and is suitable for a millimeter wave communication system.

The application discloses a high-resolution P-wave time difference extraction method, device and equipment, and the method comprises the following steps: extracting a low-resolution P-wave time difference curve and a P-wave arrival time curve of a target well based on monopole array waveform data of the target well, and extracting a low-resolution S-wave time difference curve of the target well based on dipole array waveform data of the target well; constructing a borehole earth numerical model of the target well based on a caliper logging curve, a density logging curve and the low-resolution P-wave time difference curve and the low-resolution S-wave time difference curve of the target well, and determining a simulated monopole P-wave waveform curve of the target well based on the borehole earth numerical model; performing frequency-wave number domain analysis based on the simulated monopole P-wave waveform curve to determine a high-order P-wave frequency band distribution range; performing filtering processing on the measured monopole array waveform data based on the high-order P-wave frequency band distribution range to obtain high-order P-wave array waveform data; and determining a high-resolution P-wave time difference based on the high-order P-wave array waveform data and the P-wave arrival time curve.

The utility model discloses a kind of middle-low orbit satellite antenna assemblies, including deployable phased array antenna main body, intelligent heat dissipation module, multi-frequency band isolation feed network and self-adaptive beam control unit;Main body contains 6 foldable subarrays, each subarray is connected with the magnetic rheological hinge of built-in electromagnetic coil and magnetic rheological liquid cavity center pivot, subarray surface is equipped with the nested radiation unit of "outer Ku frequency band dipole array+inner Ka frequency band microstrip patch array", there is polytetrafluoroethylene isolation layer between the two and feed point staggered;Intelligent heat dissipation module is attached to the back of main body, containing phase change material layer, micro heat pipe array and graphene skin;Feed network contains Ku / Ka power division network and sequentially connected X-type isolator, dual-band circulator, wave filter;Beam control unit contains DBF chip, T / R component and PWM power management circuit.

The application discloses a preparation method of a frequency band magnetic control adjustable aerogel-based wave-absorbing material. First, ferromagnetic iron-cobalt nanosheets are obtained through a liquid phase reduction method, and then the nanosheets are ultrasonically mixed and dispersed with graphene oxide. The mixed system is subjected to a hydrothermal reaction to obtain a composite hydrogel precursor. After freeze-drying, a graphene aerogel-based composite wave-absorbing structure is obtained, wherein the ferromagnetic nanosheets exist in the hollow skeleton structure of the aerogel. The precursor aerogel structure is quickly immersed in a sodium alginate solution, and a hydrogel medium is formed in the structure by adding calcium ions, so that the nanosheets are suspended in the hollow skeleton of the aerogel, and an adjustable composite wave-absorbing material is obtained. By applying an external magnetic field at different angles, the nanosheets are oriented in the hollow skeleton. By changing the angle between the interface dielectric dipole array and the easy magnetization magnetic moment and the electromagnetic wave vector, respectively, the microwave electromagnetic parameters and the impedance of the material are dynamically adjusted, so that the real-time dynamic adjustment of the wave-absorbing performance and the absorption frequency band is realized.

The invention discloses a construction, regulation and control method and system for an axial optical skyrmion array, and the method comprises the steps: S1, constructing an optical focusing system which is used for generating an initial light field; a plurality of pairs of electric dipoles and magnetic dipoles which are spatially distributed and are symmetrical about a yoz plane are arranged in an initial light field along an optical axis; s2, parameters of the electric dipole and the magnetic dipole are adjusted, the parameters comprise the amplitude, the distance and the initial phase, so that a multi-focus light field configuration is formed, and the intensity distribution and the phase distribution of a light field are controlled; completing the construction of a target light field; and S3, changing the state of the skyrmion in the light field under the condition that the structure of the light field is not changed by adjusting at least one of the parameters. Compared with the prior art, the time reversal dipole array radiation and vector tight focusing technology is combined, so that the controllable construction of the Nel type and Bloch type optical skyrmion is realized.

The invention discloses a four-order cumulant-based sparse rectangular distributed magnetic ring dipole array multi-domain sensing method, and mainly solves the problems that the degree of freedom of an existing sparse multi-polarization array is limited and the calculation complexity is too high in joint estimation of a two-dimensional direction of arrival and polarization parameters. The method comprises the following implementation steps of: constructing a sparse rectangular distributed orthogonal magnetic ring dipole array and carrying out signal modeling; reconstructing x-axis subarray data and y-axis subarray data of the sparse rectangular distributed orthogonal magnetic ring dipole array; and signal multi-domain information closed sensing based on recovery data. The four-order cumulant enhanced degree of freedom and the natural decoupling characteristic of the distributed orthogonal magnetic ring dipole array on horizontal and vertical polarization are effectively utilized, spatial polarization domain parameter coupling caused by introduction of high-order statistics is avoided, multi-parameter joint closed estimation under the sparse multi-polarization array is achieved, and the method is suitable for large-scale popularization and application. And a high-degree-of-freedom multi-target sensing capability is provided for a radar system.

This invention discloses a method and system for selecting the optimal vertical stimulation interval for hot dry rock boreholes. The method quantitatively characterizes the lithology, physical properties, thermal properties, rock mechanical properties, and geostress characteristics of the rock mass along the borehole's vertical direction based on conventional logging data, wellbore acoustic scanning imaging logging data, microresistivity scanning imaging logging data, dipole array acoustic logging data, and natural gamma ray spectroscopy logging data. This comprehensive evaluation determines the optimal vertical stimulation interval for the hot dry rock borehole. This method performs logging evaluation and selection of the five properties of the rock mass encountered by the hot dry rock borehole, enabling the analysis and selection of the dominant vertical rock strata in hot dry rock, and effectively guiding the stimulation of high-temperature geothermal hot dry rock reservoirs.

The invention discloses a compact broadband circularly polarized magnetoelectric dipole array antenna applied to millimeter wave communication, which comprises an upper layer dielectric plate and a lower layer dielectric plate which are connected through plastic screws, a metal radiation patch is adhered to the upper surface of the upper layer dielectric plate, a metal ground layer is arranged on the upper surface of the lower layer dielectric plate, a coupling gap is etched in the metal ground layer, and the coupling gap is communicated with the metal radiation patch. The bottom surface of the metal ground layer is provided with a U-shaped micro-strip feeder line, the terminal of the micro-strip feeder line is connected with a 50-ohm SMA connector, and the SMA connector is connected to the side edge of the lower dielectric plate. Parasitic patches are added during unit design, the working bandwidth of the antenna is improved, a sequential rotation method is used during 4 * 4 array forming, the lengths of feeder lines between feed networks are sequentially different, the 90-degree phase difference is generated between array elements, the necessary condition for forming circular polarization is generated, and the circular polarization characteristic of the whole antenna is greatly improved.

The application provides a large-frequency-ratio three-frequency antenna for Wi-Fi / WiGig application, which comprises a first dielectric plate and a second dielectric plate; one side of the first dielectric plate is defined as a front side, and the other side is a back side; the front side of the first dielectric plate is provided with a reflective array surface and a rectangular patch; the back side is provided with a grid patch and a dipole array arranged in a blank area of the grid patch; the grid patch and the dipole array are multiplexed as a floor in the reflective array antenna; one side of the second dielectric plate and opposite to the back side of the first dielectric plate is a metal floor, and the metal floor is provided with a first through hole and a second through hole for feeding the grid patch antenna and the dipole array antenna respectively; the other side of the second dielectric plate is provided with a differential feeding network, a power divider and a band-pass filter; the grid patch antenna, the dipole array and the reflective array antenna in the application have a multiplexing relationship in structure, three-frequency operation can be realized without increasing additional space, and the integration of the antenna structure is improved.