31 results about "Metamaterial antenna" patented technology

The invention discloses a ship state monitoring system and method based on multi-source data, and relates to the technical field of ship engineering, the system comprises a bionic flexible sensing module, a multi-source data acquisition module, an anti-interference communication module, a multi-source data fusion module, an edge calculation processing module, an intelligent fault diagnosis module and a man-machine interaction and decision support module; wherein the bionic flexible sensing module acquires broadband vibration signals, the multi-source data acquisition module accesses multi-source data, the anti-interference communication module realizes data transmission based on a metamaterial antenna and the like, the multi-source data fusion module generates a standardized data set, and the edge calculation processing module completes feature extraction and abnormity pre-screening. The intelligent fault diagnosis module locates a fault and generates a report, and the man-machine interaction and decision support module visualizes data; the bottleneck of curved surface detection is broken through, data transmission is guaranteed, and accurate diagnosis is realized.

The invention discloses an intelligent baby crib monitoring system based on wireless transmission, and relates to the technical field of baby physiological monitoring, which comprises the following steps: dynamically distributing node communication time slots through wireless networking, adjusting the inclination angle of a laser array, activating a dual-band metamaterial antenna, synchronously collecting light intensity fluctuation signals and electrocardiosignals, and generating a mixed signal flow; carrying out physiological feature extraction on the mixed signal by adopting adaptive filtering and noise conjoint analysis, and generating a clean breathing waveform and an electrocardio waveform through wavelet decomposition and dynamic threshold suppression; respiration and heart rate abnormity is identified based on zero cross point detection and R wave energy verification, and a transmission priority is determined in combination with chaotic key generation and a Markov decision model. Through multi-band collaborative networking and dynamic time slot allocation, hardware-level synchronous acquisition of light intensity fluctuation signals and electrocardiosignals is realized, and signal synchronization errors are controlled in combination with metamaterial antenna dual-channel noise capture and differential common-mode rejection.

This invention provides a wireless passive multi-parameter integrated sensor based on conformal surface design and its fabrication method, belonging to the field of aero-engine sensor technology. The sensor includes: a lower heat insulation layer, a metal layer, a lower substrate, an upper substrate, a sensitive element layer, and an upper heat insulation layer. The lower heat insulation layer is deposited on the lower surface of the metal layer, and the metal layer is sprayed onto the lower surface of the lower substrate. The lower and upper substrates are bonded together to form a double-layer substrate structure. The sensitive element layer is printed on the upper surface of the upper substrate, and the upper heat insulation layer is deposited above the sensitive element layer. The sensitive element layer consists of a strain-sensitive metamaterial antenna, a temperature-sensitive metamaterial antenna, and a heat flow-sensitive element. The strain-sensitive and temperature-sensitive metamaterial antennas are arrayed on the upper surface of the upper substrate. This invention addresses the problems of difficult wiring, difficult conformal surface design, and difficult integration in existing sensors, thereby enabling real-time and rapid detection of temperature, strain, and heat flow in engine blades in the aerospace field.

Antennas with integrated varactor circuits are described. The antenna may comprise metasurface antennas. In some embodiments, an antenna comprises an array of antenna elements, wherein each antenna element comprises a iris and a varactor diode integrated on an integrated circuit (IC) chip coupled across a portion of the iris. The antenna can also comprise a plurality of transistors, each transistor coupled to a distinct one of the varactor diodes in the array of antenna elements to provide a tuning voltage to the one varactor diode.

The present invention discloses an intelligent crib monitoring system based on wireless transmission, which relates to the technical field of infant physiological monitoring. The system includes the following steps: dynamically allocating node communication time slots through wireless networking, adjusting the laser array tilt angle and activating a dual-band metamaterial antenna to synchronously collect light intensity fluctuation signals and electrocardiogram signals to generate a mixed signal stream; extracting physiological features from the mixed signal using adaptive filtering and noise joint analysis; generating clean respiratory waveforms and electrocardiogram waveforms through wavelet decomposition and dynamic threshold suppression; identifying respiratory and heart rate anomalies based on zero-crossing point detection and R-wave energy verification, and determining transmission priority by combining chaotic key generation and a Markov decision model. The present invention achieves hardware-level synchronous acquisition of light intensity fluctuation signals and electrocardiogram signals through multi-band collaborative networking and dynamic time slot allocation, and controls signal synchronization errors by combining dual-channel noise capture and differential common-mode suppression of the metamaterial antenna.

This in-waveguide metasurface-structured antenna comprises: a waveguide which has an opening at an end thereof, and of which the width of the rectangular or circular perimeter gradually decreases from the end thereof; and a metamaterial antenna which has a 3D stacked structure, is provided inside the waveguide, and has negative (-) permittivity and permeability in a particular frequency band.

The invention relates to the field of metamaterial antennas, and provides a directional radiation antenna structure with adjustable power, which aims at solving the problem that the existing beam control or directional diagram reconstruction method generally depends on a mechanical system, a phased array or a reconfigurable metasurface and lacks the capability of dynamically and continuously adjusting the radiation power of a directional antenna on the premise of not changing the beam shape. One end of the metal waveguide A fixes the SMA connector, and the other end is connected with the metal waveguide B; the metal waveguide B is of a cavity structure, an electric regulation and control structure is arranged in an inner cavity of the metal waveguide B. A plurality of openings distributed at equal intervals are formed in the outer side of the emergent face of the metal waveguide C. The resonance characteristic of the electric opening resonance ring is changed by changing capacitance of the variable capacitance diode. The metamaterial antenna with the near-zero dielectric constant can keep high directionality and a stable radiation pattern, and the radiation power of the metamaterial antenna with the near-zero dielectric constant can be remarkably enhanced.

The invention relates to the field of radomes, in particular to a metamaterial antenna and a metamaterial array antenna. The metamaterial antenna comprises an antenna body and an antenna housing which are spaced from each other, the antenna body is wrapped in the antenna housing, the antenna housing is a frequency-selective antenna housing capable of shielding electromagnetic waves of a first wave band, and the antenna body comprises a wave absorbing plate, a supporting plate, a horizontal polarization unit and a vertical polarization unit. The wave-absorbing plate is a power-resistant wave-absorbing plate capable of absorbing electromagnetic waves of a second wave band, the wave-absorbing plate is connected with the supporting plate, the supporting plate is used for supporting the horizontal polarization unit and the vertical polarization unit, and the horizontal polarization unit and the vertical polarization unit are conformal with the wave-absorbing plate respectively; the isolation between the antennas can be improved through the innovative structural design of the metamaterial antenna, so that the active standing-wave ratio of the antenna is improved.

This invention relates to the field of radar-communication integration, specifically to a radar-communication integrated system with a metamaterial antenna architecture and a waveform optimization method. It utilizes a dynamic metamaterial antenna pre-encoder to fit an optimal pre-encoder for the dynamic metamaterial antenna, ultimately obtaining the optimal pre-encoder. This system optimizes radar transmission beamforming performance while satisfying communication user quality and constant power mode constraints. This invention considers dynamic metamaterial antennas, which saves costs and occupies a small area. The radar beam performance is similar to that of a phase-shifter-based hybrid antenna structure. Under reasonable communication quality constraints, the radar beam of the radar-communication integrated system with the dynamic metasurface antenna architecture approaches the performance of a radar beam without spectrum sharing.

The invention provides a metamaterial antenna cabin which comprises a skin, a wave absorbing and transmitting integrated material, an antenna assembly and a support. The skin and the support are fixedly connected together to form an accommodating space, and the wave-absorbing and wave-transmitting integrated material and the antenna assembly are arranged in the accommodating space; and the wave absorbing and transmitting integrated material is arranged between the skin and the antenna assembly and is used for filling a gap between the skin and the antenna assembly. According to the metamaterial antenna cabin disclosed by the invention, good wide-angle low-scattering characteristics can be realized on an azimuth angle plane and a pitch angle plane while conformal and broadband radiation performance is ensured. According to the metamaterial antenna cabin, the broadband and low-scattering characteristics are achieved at the same time, the contradiction between the electrical performance and the low-scattering performance is solved, and the metamaterial antenna cabin has excellent strength and quality performance; the excellent performance can be applied to the fields of tip aviation equipment, spaceflight, rail transit, national defense and military industry and the like.

The invention discloses a ceramic-based metamaterial antenna housing based on topological optimization and a design method of the ceramic-based metamaterial antenna housing. The invention discloses a ceramic-based metamaterial antenna housing based on topological optimization. The ceramic-based metamaterial antenna housing comprises a plurality of ceramic unit cell units which are periodically arranged above a corresponding antenna area of the antenna housing; each ceramic unit cell unit is composed of M * N ceramic cuboid columns, and the size of each ceramic unit cell unit on the plane of the radome is smaller than the wavelength corresponding to the highest frequency of the stop band of the radome; the height of each ceramic cuboid column in each ceramic unit cell unit is obtained through optimization based on a topological optimization model, and the optimization target of the topological optimization model is that the passband wave transmission rate of the antenna housing is maximized and the stopband wave transmission rate is minimum. According to the technical scheme of the embodiment of the invention, the antenna housing which can work in a severe environment and meets the electromagnetic performance requirement of an antenna is provided.

The utility model discloses an antenna housing, a plurality of metamaterial units are arranged in the antenna housing, each metamaterial unit comprises at least one microstructure, each microstructure is a regular polygon metal sheet, and a notch is formed in the edge of each metal sheet towards the center point. The antenna housing provided by the utility model has the characteristics of transmitting P-C wave bands and reflecting Ku-Ka wave band electromagnetic waves, and has low insertion loss and good angle stability and polarization stability; the wave-transparent performance in a passband is good, the signal loss is small, the stopband performance is good, and almost total reflection is realized; the octagonal arrangement mode of the frequency selective surface is utilized, so that the unit is more compact, the frequency generated by grating lobes and surface wave singularity is improved, and the frequency selective surface has a wider working frequency band; the single-layer frequency selective surface is simple in structure and low in cost, and errors can be caused by processing different from a multi-layer structure.

To miniaturize an RFID inlay to which a metamaterial antenna is appropriate as compared with a conventional art.SOLUTION: According to an embodiment of the present invention, an RFID inlay that is arranged onto a substrate, and receives and operates an electric wave of a predetermined frequency band from a leader is provided. The RFID inlay comprises: a capacitor part that is formed in a predetermined conductive pattern onto the substrate; an inductor part that is formed in the predetermined conductive pattern onto the substrate; a pair of power supply parts; and an IC chip that is connected to the pair of power supply parts. A single series circuit is formed by the capacitor part, the inductor part, the pair of power supply parts, and the IC chip, and the single series circuit is configured to be oscillated by a predetermined frequency included in a frequency band.SELECTED DRAWING: Figure 7

A broadband patch antenna based on an artificial surface plasmon structure belongs to the technical field of metamaterial antennas, solves the problem of how to improve the working bandwidth of a patch antenna, receives an input electromagnetic signal by using a microstrip feeder line of a fork-shaped structure, optimizes impedance matching, couples the electromagnetic signal to a metal patch through a feed slot, and improves the working bandwidth of the patch antenna. The comb tooth structure arranged in the feed slot can be coupled with a plurality of resonant frequencies through a plurality of comb teeth, the bandwidth can be obviously widened, the artificial surface plasmon structure arranged on the metal patch comprises grooves with different depths, and the design that the depths of the grooves are gradually changed can generate multimode resonance, so that the working bandwidth of the patch antenna is expanded, the antenna performance is excellent, and the antenna has a wide application prospect. Meanwhile, the patch antenna is simple in structure and convenient to process.

The embodiment of the invention provides a large-angle low-pass high-resistance metamaterial antenna housing. The antenna housing structurally comprises a first base material layer, a first prepreg layer, a first core material layer, a second prepreg layer, a second base material layer, a third prepreg layer, a second core material layer, a fourth prepreg layer and a third base material layer which are sequentially stacked from outside to inside. A first microstructure is arranged on the first base material layer, a second microstructure is arranged on the second base material layer, and a third microstructure and a fourth microstructure are respectively arranged on the upper surface and the lower surface of the third base material layer. The first microstructure, the third microstructure and the fourth microstructure are all band-stop microstructures, and the second microstructure is a band-pass microstructure. According to the antenna housing, in-band broadband wave transmission under the large incident angle is achieved, meanwhile, out-of-band rapid cut-off is achieved so as to reduce the overall radar cross section (RCS), and therefore the requirements of a high-performance communication detection system and stealth are met.

The application belongs to the technical field of logistics monitoring, and specifically discloses a trailer logistics monitoring system based on Beidou positioning and AI, which comprises an algorithm optimization submodule, a positioning optimization module, an energy management module and a data transmission module, wherein the positioning acquisition module comprises a Beidou positioning terminal with multiple metamaterial antennas, and the Beidou positioning terminal is used for acquiring positioning data of a trailer; the positioning optimization module is used for optimizing the positioning data of the trailer based on a positioning optimization algorithm and / or a neural network to obtain optimized positioning data; the energy management module is used for performing energy management on the equipment in the trailer to increase the endurance of the equipment; and the data transmission module is used for realizing data transmission within the trailer logistics monitoring system based on Beidou positioning and AI and data transmission between the trailer logistics monitoring system based on Beidou positioning and AI and other systems.

A radio-frequency (RF) antenna and method for using the same are disclosed. In some embodiments, an antenna includes an array of RF radiating antenna elements, a plurality of RF antenna element driving circuits coupled to the array of RF radiating antenna elements to supply tuning voltages to the RF radiating antenna elements, and one or more metal power planes, each of the one or more metal power planes coupled to supply a common voltage to two or more of the plurality of RF antenna driving circuits.

The invention provides a metamaterial antenna applied to Internet of Things communication and a preparation method. According to the metamaterial antenna, a grounding layer is spin-coated on a first surface of a substrate layer; the second surface of the substrate layer is spin-coated with a metamaterial unit layer; the first surface is opposite to the second surface; the substrate layer is composed of polylactic acid, plant oil-based epoxy resin and a phase solvent; a feed layer is etched on the first surface of the grounding layer; the grounding layer is composed of copper particles. The first surface of the metamaterial unit layer is spin-coated with a matching layer; the metamaterial unit layer is composed of graphene nanopowder, a solvent and a dispersing agent; the first surface of the matching layer is spin-coated with a protective layer; the matching layer is composed of a polyimide solution; and the protective layer is formed by spin-coating a polyimide solution and an antistatic agent. According to the metamaterial antenna, a multi-layer composite structure is utilized, and the overall size of the metamaterial antenna is effectively reduced. And by adopting the biodegradable material, the preparation cost and the environmental influence are reduced.

The application provides a kind of based on stereolithography ultra-wide bandwidth beam medium resonant antenna, belong to antenna design field, including double-layer PCB structure and medium resonator, wherein, double-layer PCB structure includes first upper surface copper clad (4), second upper surface copper clad (5), lower surface copper clad (3), medium substrate (2);Medium resonator structure includes ceramic medium block (1), first slot (6), second slot (7);First, second upper surface copper clad is located on the upper surface of medium substrate, and first, second upper surface copper clad is microstrip line;Lower surface copper clad is the ground plane corresponding to microstrip line, and ground plane has gap with medium resonator;Ceramic medium block has first and second slot, and two slots are equal in size, wherein, first slot is located above medium resonator, and second slot is located below medium resonator.The application can realize complex structure of medium material conformal coating by stereolithography additive manufacturing technology, and realize the impedance bandwidth of ultra-wide band.

The invention discloses an unmanned aerial vehicle data security encryption and remote transmission management system and method and a medium, and relates to the field of unmanned aerial vehicle data security protection and remote transmission. The intelligent sensing and edge computing module integrates multiple sensors, and adopts a heterogeneous architecture and a YOLOv8 model; the dynamic encryption processing module adopts SM4, chaos and SM9 cryptographic encryption, and supports three sensitive levels; the self-organizing destroy-resistant communication network module constructs a LORAMesh network and is matched with a phased-array antenna to switch an unmanned aerial vehicle cluster relay; the physical unclonable key management module uses PUF features and a block chain smart contract; the anti-interference receiving and intelligent reconstruction module is provided with a metamaterial antenna and 3D-CNN reconstruction; the active defense and situation awareness module deploys a GAN honeypot and CNN monitoring. The method is high in encryption speed, safe in key management, high in interference resistance, low in delay rate and capable of intelligently processing data, reinforcing hardware safety and reducing power consumption, and provides efficient and safe support for related fields.

The invention provides a wireless passive multi-parameter integrated sensor based on curved surface conformal and a preparation method thereof, and belongs to the technical field of aero-engine sensors. The sensor comprises a lower heat insulation layer, a metal layer, a lower substrate, an upper substrate, a sensitive unit layer and an upper heat insulation layer, the lower heat insulation layer is deposited on the lower surface of the metal layer, the metal layer is sprayed on the lower surface of the lower substrate, the lower substrate and the upper substrate are attached to form a double-layer substrate structure, and the sensitive unit layer is printed on the upper surface of the upper substrate. The upper heat insulation layer is deposited above the sensitive unit layer, the sensitive unit layer is composed of a strain sensitive metamaterial antenna, a temperature sensitive metamaterial antenna and a heat flow sensitive unit, and the strain sensitive metamaterial antenna and the temperature sensitive metamaterial antenna are distributed on the upper surface of the upper substrate in an array mode. The invention is used for solving the problems of difficult wiring, difficult curved surface conformal and difficult integration of the existing sensor, thereby realizing the real-time rapid detection of the temperature, strain and heat flow of the engine blade in the aerospace field.

Disclosed is a metasurface structure antenna within a waveguide. This metasurface structure antenna within a waveguide includes: a waveguide which has an opening formed at an end thereof and in which the width of the perimeter of a rectangular or circular structure gradually decreases from the end thereof; and a metamaterial antenna having a 3D stacked structure, mounted inside the waveguide and having negative (-) permittivity and permeability in a specific frequency band. The metamaterial antenna having a 3D stacked structure includes: k dielectric substrates, each having the same metal pattern formed thereon; a connector in which the k dielectric substrates having the metal pattern formed thereon are stacked in a 3D stacked structure and connected to each other by a signal line, the signal line being provided on a cylindrical center line; ground provided on an outer edge that surrounds the connector and the k dielectric substrates having a 3D stacked structure on which the metal pattern is formed; and port 1 and port 2 for input and output. The metasurface structure antenna having a 3D stacked structure within an open-ended waveguide having an opening formed at an end thereof (metamaterial antenna having a 3D stacked structure) may implement, while most existing metamaterial antennas have a planar array antenna structure in an M / W region, a metamaterial antenna having a 3D stacked structure, in which a plurality of dielectric substrates, each having a metal pattern, are stacked and mounted within an open ended waveguide which has an opening formed at an end thereof and in which the perimeter of a rectangle gradually decreases, thereby integrating electromagnetic waves and reducing the angle of a frequency, a direction in which the gain of the antenna increases, and the circuit size of the metamaterial antenna having a 3D stacked structure.

The invention discloses a self-decoupling metamaterial antenna array realized based on substrate punching. The self-decoupling metamaterial antenna array comprises at least two metamaterial antenna units, each metamaterial antenna unit comprises a radiation unit and a feed unit, the radiation unit comprises a middle-layer substrate and a plurality of metallized through holes which are arranged on a top-layer dielectric substrate and are periodically distributed, and the two radiation units of the adjacent metamaterial antenna units share the metallized through hole located at the junction; the feed unit comprises a microstrip line arranged on the lower surface of the bottom layer dielectric substrate, a metal ground plane is arranged on the upper surface of the bottom layer dielectric substrate, and a gap used for coupling feed is formed in the metal ground plane. On the basis of not introducing additional decoupling circuits or decoupling elements, the isolation degree of adjacent units is improved, a good decoupling function is obtained, meanwhile, the array structure is simple and easy to integrate, and the millimeter wave multi-input and multi-output wireless communication system has potential application prospects.

The application discloses a kind of based on SISL structure's fusion metamaterial antenna architecture, including SISL structure's antenna, from top to bottom sequentially have at least five layers of dielectric substrate, and each layer substrate has metal layer on both sides;First dielectric substrate is used to form metamaterial functional layer with metamaterial, second dielectric substrate has upper cavity, second dielectric substrate is transmission layer, and is embedded with ENZ material, third dielectric substrate is antenna layer, and is arranged feed antenna, fourth dielectric substrate has lower cavity, and fifth dielectric substrate is ground layer.The application uses SISL structure PEC loading, feed radiation field is concentrated in the cavity formed by second dielectric substrate and surrounding metal through hole, strengthens the interaction of super surface and feed, reduces the lateral radiation leakage of feed;Second dielectric substrate is embedded with ENZ material, so as to ensure that the radiation performance is not degraded under the condition that the antenna overall is low profile;Except radiation aperture, antenna overall is encapsulated by SISL structure, and the integration of antenna is improved.

An antenna array utilizing a ground protection ring and a metamaterial structure is disclosed. In certain embodiments, the antenna array includes a plurality of antenna elements, where each antenna element is identical. The antenna element includes an upper surface that includes a patch antenna and a ground protection ring. A reactive impedance surface (RIS) layer is disposed below the upper surface and includes a metamaterial structure. The metamaterial structure is configured to provide inductance to the patch antenna, thereby allowing the patch antenna to be smaller than otherwise possible. In some embodiments, the metamaterial structure includes a hollow square frame. An antenna array constructed using such antenna elements has less coupling than a conventional antenna array, thereby resulting in better performance. Furthermore, such a new antenna array also requires less space than a conventional antenna array.

The invention particularly relates to a low-profile dual-linear polarization independently regulated 2-bit information metamaterial antenna, which comprises a plurality of antenna units, each antenna unit comprises a first dielectric substrate and a second dielectric substrate which are laminated together, and the first dielectric substrate is located on the second dielectric substrate; a radiation patch is arranged on the upper surface of the first dielectric substrate; a metal floor etched with an orthogonal cross gap is arranged between the first dielectric substrate and the second dielectric substrate; the lower surface of the second dielectric substrate is provided with a dual-polarization 2-bit phase shift circuit, and the dual-polarization 2-bit phase shift circuit feeds the radiation patch through the orthogonal cross gap. The antenna has the advantages of miniaturization, low profile, low cost, dual-linear polarization independent regulation and control and the like, and can be widely applied to the fields of communication perception integration, energy-carrying communication and the like.

The invention provides a wide-frequency-band on-off-adjustable low-scattering metamaterial antenna housing. The antenna housing comprises a first frequency selection surface layer, a first substrate layer, a second frequency selection surface layer, a core material layer, a third frequency selection surface layer, a second substrate layer and a fourth frequency selection surface layer which are stacked in sequence from outside to inside. The first frequency selection surface layer, the second frequency selection surface layer, the third frequency selection surface layer and the fourth frequency selection surface layer respectively comprise a substrate and a conductive microstructure arranged on the substrate, and at least one switch control element is arranged in the conductive microstructure of the first frequency selection surface layer; under the condition that the at least one switch control element is switched on, electromagnetic waves of a preset low frequency band in the preset frequency band penetrate through the antenna housing; and under the condition that the at least one switch control element is switched off, the antenna housing cuts off the electromagnetic wave of the preset frequency band. Therefore, the antenna housing can realize a low-frequency wide-frequency range passband when the switch control element is in an on state, and can realize strong cut-off when the switch control element is in an off state, and the wave transmission rate in the passband is high.

This invention relates to a microstrip slot-fed broadband metadielectric resonator antenna, belonging to the field of metamaterial antenna technology. It addresses the problem of designing a microstrip slot-fed broadband metadielectric resonator antenna with wide impedance bandwidth, flat gain curve, and simple structure. The antenna receives an RF signal from the excitation port, which is then conducted through a rectangular microstrip line to a rectangular slot. The rectangular slot then conducts the RF signal to a rectangular metadielectric resonator radiator array. Multimode resonance is generated by the coupling between the rectangular metadielectric resonator radiator elements, thereby increasing the impedance bandwidth. The signal radiates from the top of the rectangular metadielectric resonator radiator array. The antenna exhibits a flat gain curve, superior performance, and advantages such as simple structure and easy fabrication.

The embodiment of the invention provides a large-angle wave-transparent metamaterial antenna housing, which comprises a first prepreg layer, a second prepreg layer, a core material layer, a first microstructure layer and a second microstructure layer, the structures of the antenna housing are sequentially provided with a first microstructure layer, a first prepreg layer, a core material layer, a second prepreg layer and a second microstructure layer from outside to inside in a lamination sequence; the first microstructure layer and the second microstructure layer are both band-stop microstructure layers. According to the antenna housing, in-band broadband wave transmission under the large incident angle is achieved, meanwhile, out-of-band rapid cut-off is achieved so as to reduce the overall radar cross section (RCS), and therefore the requirements of a high-performance communication detection system and stealth are met.