82 results about "Patch array" patented technology

The invention relates to the technical field of antennas, in particular to a high-isolation double-frequency common-caliber miniaturized phased-array antenna which comprises a high-frequency-band linear polarization end-fire metal patch array structure, a low-frequency-band linear polarization end-fire metal patch array structure, a public metal reflection floor and a single-layer dielectric substrate. Radiation structures of the high-frequency-band linear polarization end-fire metal patch array structure and the low-frequency-band linear polarization end-fire metal patch array structure are formed by improved dipoles of microstrip balun feed with out-of-band rejection, so that linear polarization is achieved, and then the dipoles are fed through the improved microstrip balun with out-of-band radiation rejection. The suppression on high frequency is further deepened and the decoupling bandwidth is expanded; in addition, a decoupling structure is added between the adjacent common-frequency antennas to improve the isolation and radiation capability between the adjacent common-frequency antenna units, high isolation and wide beam coverage of the dual-frequency common-aperture phased-array antenna can be realized, the performance of the antenna is improved, and the dual-frequency common-aperture phased-array antenna is simple in process and low in cost.

The invention discloses a lower limb movement monitoring and guiding method. A hardware part comprises a flexible induction sheet array, a smart phone, a built-in RGB-D camera of the smart phone and an edge calculation module. The flexible induction sheet array comprises five flexible induction sheets, each flexible induction sheet comprises a skin contact layer, a sensor layer, a flexible FPC substrate and a protective layer, the sensor layer is provided with a three-axis MEMS acceleration sensor, a PVDF piezoelectric film sensor, a flexible FPC substrate integrated signal conditioning module and a Bluetooth communication module; the flexible induction sheet is provided with an anatomical positioning mark; the lower limb movement monitoring and guiding method comprises the following steps: S1, cleaning; s2, a step of attaching a flexible induction sheet; s3, an automatic positioning calibration step; s4, a data transmission step; s5, a data fusion and calculation analysis step; s6, a normalization evaluation step; and S7, a feedback and optimization step. Quantitative assessment of lower limb movement can be effectively achieved, and the monitoring and guiding effect is good.

The invention discloses a millimeter-wave broadband high-gain low-cross polarization cavity-backed patch array antenna, which comprises a top antenna layer, a substrate integrated waveguide (SIW) cavity power divider layer and a bottom broadband feed network layer, and is characterized in that the top antenna layer is composed of a plurality of cavity-backed patch antenna units; each unit comprises an SIW dielectric back cavity and a patch antenna with two small grooves on the edge, a broken groove is added in the middle of the patch antenna to form two split small patch structures, and the patch antenna is grounded through two metal through holes. The SIW cavity power divider layer is composed of a plurality of broadband power dividers and serves as a transition structure of the antenna layer and the feed network layer, and array antenna layout is facilitated. The bottom broadband feed network layer is composed of a plurality of H-shaped sections, is a sixteen-path power divider, is cascaded with an SIW cavity power divider, and feeds the top array antenna. The array antenna structure has a broadband characteristic and a high gain characteristic, inhibits a cross polarization component, and realizes a low cross polarization characteristic.

The invention belongs to the technical field of antennas, and discloses an S / Ka waveband common-aperture antenna and communication equipment, and the antenna comprises a first dielectric plate and a second dielectric plate which are stacked from top to bottom. The top surface, the middle and the bottom surface of the first dielectric plate are respectively provided with a rectangular patch array, a first metal through hole and a first metal layer; wherein the rectangular patch array, the first metal through hole and the first metal layer form a magnetoelectric dipole antenna array; the magnetoelectric dipole antenna array works in a Ka wave band and is used for realizing satellite communication; the top surface, the middle and the bottom surface of the second dielectric plate are respectively provided with a second metal layer, a second metal through hole and a third metal layer; wherein the second metal layer, the second metal through hole and the third metal layer form a low-profile monopole antenna; the low-profile monopole antenna works in an S wave band and is used for realizing ground equipment communication; the structure is simple, different wave beams and polarization characteristics can be realized, the space utilization rate of the antenna is effectively improved, and the integration degree is high.

The present invention provides a dual board patch array antenna, comprising: a radio board; a first-layer antenna board and a second-layer antenna board; the ground plane of the radio board is in contact with the first radiation ground plane of the first-layer antenna board through a patch-type conductive pad to form an extended ground area of ground connection; the probes of the radio board pass through and contact the patch microwave transmission line of the first-layer antenna board to form an electrical connection; wherein the patch microwave transmission line is assigned to the antenna radiating element of the second-layer antenna board as a vertically polarized antenna and a horizontally polarized antenna; the antenna radiating element contacts the first radiation surface on the first-layer antenna board through the conductor pad on the first layer antenna board, so as to expand the radiation surface area of the dual board patch array antenna.

The broadband circular polarization conformal antenna adopts the combination of three layers of dielectric substrates and an air layer, and comprises an upper layer dielectric substrate, a middle layer dielectric substrate, a lower layer dielectric substrate, a central 2 * 2 corner cut square patch, a peripheral 16 corner cut square patch, a square feed patch with a rectangular groove formed along a diagonal line, a metal floor and a feed microstrip line, a metasurface structure is printed on the upper surface of the upper-layer dielectric substrate 1 and comprises a 2 * 2 corner cut square patch array 4 located in the center and 16 corner cut square patches 5 surrounding the center array; a square feed patch and a feed microstrip line are printed on the lower surface of the middle-layer dielectric substrate 2, the square feed patch is located at the dead center of the lower surface of the middle-layer dielectric substrate, and a rectangular groove is formed in the dead center of the square feed patch in the diagonal direction; and a complete metal floor is arranged on the lower surface of the lower dielectric substrate. The antenna has the characteristic of low profile, and the antenna can be conformal to a cylindrical surface carrier platform.

The application belongs to the technical field of antennas, and discloses an S / Ka-band common-aperture antenna and communication equipment, which comprises a first dielectric plate and a second dielectric plate stacked from top to bottom; the top surface, the middle and the bottom surface of the first dielectric plate are respectively provided with a rectangular patch array, a first metal through hole and a first metal layer; wherein the rectangular patch array, the first metal through hole and the first metal layer form a magneto-electric dipole antenna array; the magneto-electric dipole antenna array works in the Ka-band and is used for realizing satellite communication; the top surface, the middle and the bottom surface of the second dielectric plate are respectively provided with a second metal layer, a second metal through hole and a third metal layer; wherein the second metal layer, the second metal through hole and the third metal layer form a low-profile monopole antenna; the low-profile monopole antenna works in the S-band and is used for realizing ground equipment communication; the application has a simple structure, can realize different beams and polarization characteristics, effectively improves the space utilization rate of the antenna and has high integration.

A wave beam adjustable polarization reconfigurable broadband antenna based on a characteristic mode comprises a first dielectric plate, a second dielectric plate and a third dielectric plate from top to bottom in sequence, 3 * 3 square metal patch arrays arranged at equal intervals are printed on the upper surface of the first dielectric plate, a square driving patch is printed on the upper surface of the second dielectric plate, and a metal grounding plate is printed on the lower surface of the second dielectric plate. A feed network is printed on the lower surface of the third dielectric plate, and the square metal patch array and the square driving patch form a double-layer radiation structure, so that the antenna works in an unconventional electric field distribution mode, and the working bandwidth of the antenna is widened.

The invention discloses a C-band double-inductance circularly polarized leaky-wave antenna, and belongs to the technical field of microwave antennas. The parasitic patch regulates and controls the distribution of an electromagnetic field through the slotting design of the strip-shaped groove. The transmission line is located in the center of the dielectric substrate and keeps a reasonable interval with the parasitic patch to achieve a leaky wave function, and the metal floor serves as a reflecting surface to suppress back lobe radiation and improve forward gain. Through rotation of the strip-shaped groove at a groove angle of + / -10 degrees, left-hand circular polarization is realized in a frequency band of 6.235-6.583 GHz, and right-hand circular polarization is realized in a frequency band of 7.423-7.474 GHz. Meanwhile, by means of collaborative design of a parasitic patch array structure and a transmission line, a full-band S11lt is achieved; -10dB broadband impedance matching is achieved, and a main beam stably points to the vicinity of 22 degrees.

The invention discloses a multilayer FSS MIMO antenna integrating line circular polarization conversion and decoupling functions, which comprises two layers of dielectric plates and three layers of metal patch layers, the two layers of dielectric plates and the three layers of metal patch layers are formed by mixed pressing, the three layers of metal patch layers and the two layers of dielectric plates are arranged in a staggered manner, and the metal patch layers are in close contact with the dielectric plates; the antenna further comprises a lower dielectric plate, the bottom plate of the lower dielectric plate is provided with a metal ground layer, the surface of the lower dielectric plate is provided with a patch antenna, the metal ground layer is provided with a feed port, and the feed port is communicated with the bottom surface of the lower dielectric plate. The antenna is applied to the sub-6 GHz frequency band, the functions of linear circular polarization conversion and decoupling are achieved at the same time, high isolation can be kept between 3 * 3 patch array antenna units through metasurface loading, directional diagram distortion is improved, efficiency and gain loss are improved, and energy waste is reduced. After linear circular polarization conversion, the polarization mismatch sensitivity of the MIMO antenna can be reduced, the multipath suppression capability of the MIMO antenna is improved, and the channel capacity of the MIMO antenna is expanded.

The invention discloses a dual-polarization flexible transparent array antenna with high isolation and low side lobe performance. The dual-polarization flexible transparent array antenna comprises a dielectric substrate, a grounding layer and a radiation patch array. The dielectric substrate is made of polydimethylsiloxane (PDMS) with the thickness of 0.5 mm; according to the array antenna, 50-ohm microstrip line side feed power supply is adopted, an orthogonal series microstrip patch array is presented, a hollowed-out cross structure is adopted at the joint to excite a high-order mode, reverse current generated by the high-order mode is restrained at the same time, side lobes are effectively reduced, and the isolation degree of antenna gain and a dual-polarization port is improved; meanwhile, in order to further reduce side lobes, the gradually-changed patch width is adopted. The antenna is small in overall size, has the characteristics of low profile, high gain, high isolation and dual polarization, has good bending performance and transparency, and can be used as a beautified antenna for a millimeter wave wireless communication system.

Stacked patch array antenna 10, comprising; a first substrate 12 (e.g a ceramic); first array of patch radiators 16a arranged on first substrate; and second array of patch radiators 16b, each radiator

The application relates to an active electromagnetic energy selective surface, comprising a metal patch array, a diode array and a controlled feed structure; the metal patch array comprises a plurality of regularly-structured and spaced metal patches; the controlled feed structure comprises a first electrode patch and a second electrode patch; the diode array comprises a first diode array part and a second diode array part; along the transverse direction of the metal patch array, the first electrode patch is arranged on both sides of the metal patch array respectively, and the first diode array part is used for connecting adjacent metal patches and connecting adjacent metal patches and the first electrode patch; along the longitudinal direction of the metal patch array, the second electrode patch is arranged on both sides of the metal patch array respectively, and the second diode array part is used for connecting adjacent metal patches and connecting adjacent metal patches and the second electrode patch. The application effectively realizes the true receiving and transmitting compatibility of signals in the mode of introducing a bias circuit.

The invention discloses a conformal holographic metasurface antenna based on a double-layer cross embedded tensor unit, and aims to solve the problem of low surface wave-leaky wave conversion efficiency caused by inherent restriction of surface impedance modulation depth M and average impedance amplitude X of a traditional single-layer holographic metasurface antenna. An upper-layer and lower-layer cross-shaped groove patch array cross embedded topological structure is adopted, the vertical projection of a lower-layer unit is embedded into a gap region of an upper-layer unit, and the surface impedance dynamic modulation range is expanded under the sub-wavelength unit size by enhancing interlayer coupling, so that the leakage constant alpha is improved. On the basis of a holographic interference principle, surface impedance tensor modulation is realized by regulating and controlling geometric parameters of a unit, and a linearly polarized surface wave excited by a central feed source is efficiently converted into a right-handed circular polarization (RHCP) leakage wave beam with a specific angle at a frequency band of 26 GHz; in combination with a conformal mapping algorithm, the method is adaptive to a cylindrical surface with a curvature radius rho of 20-60mm, and has aperture efficiency gt; 39%, and the axial ratio is lt; 3dB, and the structure is compact.

The invention discloses a circularly polarized filtering grid slotted patch antenna based on a substrate integrated gap waveguide. The antenna adopts a multi-layer stacked structure and comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate and a fourth dielectric substrate which are arranged from top to bottom and bonding layers among the first dielectric substrate and the fourth dielectric substrate, four corner cut square patches are arranged on the upper surface of the first dielectric substrate, and two corner cut rectangular patches are arranged on the lower surface of the first dielectric substrate; the upper surface of the second dielectric substrate is provided with a cross strip and four parasitic strips, and the lower surface of the second dielectric substrate is provided with a circular ring; a rectangular metal patch with a gap is arranged on the upper surface of the third dielectric substrate, and a forked microstrip feed structure and two folding strips are arranged on the lower surface of the third dielectric substrate; the upper surface of the fourth dielectric substrate is provided with a circular metal patch array, the lower surface of the fourth dielectric substrate is provided with a rectangular metal patch as large as the fourth dielectric, and the upper surface and the lower surface of the fourth dielectric substrate are connected through a metal column to jointly form an electromagnetic band gap structure. The invention has excellent upper stop band suppression capability.

The application discloses a low-profile conformal low-scattering array antenna and belongs to the technical field of antennas. The low-profile conformal low-scattering array antenna comprises a metal bottom plate layer, a coupling feed layer, a microstrip radiation patch layer, a frequency selection layer and a polarization grid surface layer which are stacked in sequence. The microstrip radiation patch layer comprises a plurality of array patch arrays, each of which is composed of 2*2 radiation patches and forms a cross slot without contact between the radiation patches. The main body of the coupling feed layer is a cross strip. The projection of the cross strip on the microstrip radiation patch layer is located in the cross slot of the corresponding patch array, and the width of the cross strip is smaller than the width of the cross slot. A radio frequency connector is located on the metal bottom plate layer, the inner core of the radio frequency connector is connected with one end of the cross strip through the metal bottom plate layer, and the outer skin of the radio frequency connector is connected with the metal bottom plate. On the basis of guaranteeing the radiation performance of the array antenna, the low-profile conformal low-scattering array antenna can realize wide-band, wide-angle domain RCS reduction of the array antenna.

The embodiment of the invention discloses a low-profile dual-frequency common-caliber antenna unit and antenna array sharing a radiation structure, and relates to the technical field of antennae, and the antenna unit comprises a radiation layer, a grounding layer and a feed layer. The radiation layer comprises a radiation patch array and a dielectric substrate; the grounding layer is tightly attached to the radiation layer, and the grounding layer is provided with a coupling gap; the feed layer comprises a low-frequency feed line, a high-frequency feed line and a dielectric substrate, the feed layer is tightly attached to the grounding layer through the dielectric substrate, and the low-frequency feed line and the coupling gap form a low-frequency feed structure which is used for exciting all the radiation patch arrays to output low-frequency signals; and the high-frequency feed line and the coupling gap form a high-frequency feed structure which is used for exciting the local radiation patch array to output a high-frequency signal. According to the embodiment of the invention, dual-band directional and broadband radiation characteristics can be realized at the same time, array expansion is supported, and dual-band main lobe beam deflection and scanning can be realized. Compared with an existing antenna, the antenna has the advantages in structural multiplexing efficiency, profile control and dual-frequency common-caliber integration.

The invention discloses a high-isolation single-layer microstrip antenna and an array. The antenna structure comprises at least two radiation microstrip patches, two coupling microstrip strips, a dielectric layer, a grounding layer and a gap etched in the grounding layer. The high-isolation microstrip antenna array further comprises a first feed probe and a second feed probe, and the first feed probe and the second feed probe penetrate through the dielectric layer and are connected with the first feed points and the second feed points of the two radiation patches respectively. And the coupling microstrip strip is in capacitive coupling with the patch, and parallel resonance is formed at a required resonance frequency point, so that electromagnetic coupling between the first feeding point and the second feeding point is inhibited. The gaps etched on the grounding layer are located among the units, so that the isolation of the antenna array can be further improved. High isolation between patch arrays can be achieved under the condition that patch characteristic impedance is hardly affected, and meanwhile the patch array has the advantages of being single in layer, small in size and simple in structure.

This invention provides a method, system, and computer equipment for the detection and classification of hyperspectral anomalies in Chinese medicinal materials, relating to the field of Chinese medicinal material testing. The method includes: reading hyperspectral data; performing foreground detection on the hyperspectral data using a multi-scale spatial spectrum fusion method to obtain a foreground mask of the abnormal region; automatically sampling with three-dimensional patches to collect N three-dimensional patch arrays of the foreground mask region; setting up a three-dimensional convolutional neural network with a band self-attention mechanism, inputting the foreground mask and the three-dimensional patch arrays into the neural network to generate a high-level semantic feature vector; and finally outputting the classification result by passing the high-level semantic feature vector through a neighborhood spatial spectrum-based self-supervised aggregation attention module. This invention, employing the above-mentioned method, system, and computer equipment for the detection and classification of hyperspectral anomalies in Chinese medicinal materials, achieves a new, efficient, accurate, and automated method for detecting mold and insect infestation in Chinese medicinal materials, significantly improving detection quality and the system's practical value.

This invention provides an antenna with good antenna characteristics in a specific frequency band, a method for manufacturing the same, and a method for using the same. [Solution] An antenna for radar used in a frequency band of 70 GHz to 90 GHz, wherein the antenna is a patch array antenna, the antenna has a dielectric layer, the dielectric layer is a fluororesin sheet, the oxygen element ratio measured by X-ray photoelectron spectroscopy (XPS) on one or both sides of the fluororesin sheet is 3.0 atomic% or more, and the coefficient of linear expansion (CTE) of the fluororesin sheet is 100 ppm / °C or less.

Embodiments of the present disclosure provide an antenna device. The antenna device includes a dielectric substrate and a series-connected patched array antenna. The series-connected patched array antenna includes a plurality of patched antennas aligned in a predetermined direction on the dielectric substrate and connected in series. Also, the series-connected patched array antenna includes a plurality of transmission lines connecting adjacent patched antennas of the plurality of patched antennas. Furthermore, for each patched antenna of the plurality of patched antennas, a width of the patch antenna is different from a width of an adjacent patched antenna, on either side, in the predetermined direction. Also, a plurality of line lengths of the plurality of respective transmission lines varies along the predetermined direction.

A metasurface device includes an antenna element formed on the front surface of a substrate, the antenna element comprising a two-dimensional array of electrically conductive patches spaced from one another and having dimensions smaller than the operating wavelength of an emission and / or reception device, the antenna element being able to radiate in a direction having a component perpendicular to the front surface of the substrate when the ground structure has a ground plane function, the substrate comprising a layer, called a connection layer, made of photoconductive semiconductor material, in direct physical contact with the conductive patches, the semiconductor material being insulating when it is not illuminated and able to be conductive when it is illuminated at a reconfiguration wavelength.

The application discloses a Ka-band conical beam antenna, which is composed of a single-layer metal floor, a coaxial probe, a single-layer dielectric substrate and an antenna patch array. The single-layer metal floor is rectangular, a metal through hole is arranged at the center of the floor, an SMA joint is arranged at the bottom of the floor, the SMA joint is in contact with the floor and is connected with the coaxial probe. The upper layer of the dielectric substrate is the antenna patch array. The whole antenna is composed of eight impedance-matched antenna patch units on the dielectric substrate to form a Chinese character-shaped pattern. Each patch unit is composed of a rectangular microstrip antenna, a parasitic capacitance ring, a transmission microstrip line and an impedance-matching microstrip line. The antenna is connected with a signal from the SMA joint through the coaxial probe penetrating through the single-layer dielectric substrate and the single-layer metal floor. The application can realize the design requirements of a wide beam, high gain and low side lobe.

Embodiments of an antenna are provided. The antenna has a substrate with a first major surface and a second major surface. A ground plane is spatially disposed a first distance from the second major surface of the substrate, and a patch array is disposed on the second major surface between the substrate and the ground plane. Patches of the patch array are made of a material having a conductivity of 1×106 S / m or more, and the patches of the patch array are printed onto the second major surface of the substrate.

The present invention discloses a vanadium dioxide-assisted switchable multifunctional metamaterial device. The multifunctional metamaterial device is composed of square periodic unit structures continuously spliced ​​in an array form on a plane; each square periodic unit structure is composed of different functional layers stacked, from top to bottom, the top vanadium dioxide patch array, the upper dielectric layer, the metal grating layer, the vanadium dioxide film, the lower dielectric layer and the bottom metal layer; the top vanadium dioxide patch array is composed of four hexagonal vanadium dioxide patches arranged in a 2×2 form on the surface of the upper dielectric layer; the metamaterial device can achieve the switching of three functions of broadband absorber, polarization converter and total reflection by changing the phase change characteristics of vanadium dioxide. The present invention provides a broad prospect for future terahertz applications.

A microstrip filter includes a first substrate (11) and a second substrate (12) disposed oppositely, and a dielectric layer (13) disposed between the first substrate (11) and the second substrate (12). The first substrate (11) includes a first base substrate (110) and a patch array disposed on a side of the first base substrate (110) close to the dielectric layer (13). The second substrate (12) includes a second base substrate (120), a microstrip line (121) disposed on a side of the second base substrate (120) close to the dielectric layer (13), and a ground layer (122) disposed on a side of the second base substrate (120) away from the microstrip line (121). The microstrip line (121) includes a main transmission line (1211) and at least one branch (1212). An orthographic projection of the branch (1212) of the microstrip line (121) on the first base substrate overlaps with an orthographic projection of the patch array on the first base substrate (110), and the dielectric layer (13) is configured to adjust a resonant frequency between the patch array and the microstrip line (121) when a voltage is applied to the patch (111) of the patch array.

A microstrip filter comprises a first substrate (11), a second substrate (12) and a dielectric layer (13), wherein the first substrate (11) and the second substrate (12) are oppositely arranged, and the dielectric layer (13) is located between the first substrate (11) and the second substrate (12). The first substrate (11) comprises a first substrate (110) and a patch array arranged on the side, close to the dielectric layer (13), of the first substrate (110). The second substrate (12) comprises a second substrate (120), a microstrip line (121) arranged on the side, close to the dielectric layer (13), of the second substrate (120), and a grounding layer (122) arranged on the side, away from the microstrip line (121), of the second substrate (120). The microstrip line (121) comprises a main transmission line (1211) and at least one branch knot (1212). The orthographic projection of the branch knot (1212) of the microstrip line (121) and the orthographic projection of the patch array on the first substrate (110) are overlapped, and the dielectric layer (13) is configured to adjust the resonant frequency between the patch array and the microstrip line (121) when the patch (111) of the patch array is applied with voltage.

The invention discloses a high-gain reconfigurable array antenna suitable for a wireless ad hoc network of a power transmission line, which comprises a patch array layer, a first dielectric plate, a first grounding layer, a second grounding layer, a second dielectric plate and a feed network layer which are sequentially arranged from top to bottom, and is characterized in that the patch array layer comprises a plurality of rectangular patch units; variable capacitance diodes are arranged between at least a part of adjacent rectangular patch units; the first dielectric plate is provided with a metalized upper layer grounding via hole and an upper layer feed via hole, and the second dielectric plate is provided with a metalized lower layer feed via hole; the upper ends of the upper-layer grounding via holes are connected to a part of the rectangular patch units, and the lower ends are connected to the first grounding layer; the upper end of the upper-layer feed via hole is connected to a part of the rectangular patch units, and the lower end is connected to the upper end of the lower-layer feed via hole; and the lower end of the lower layer feed via hole is connected to the feed network layer. The array antenna provided by the invention is excellent in performance in various aspects, and can meet the requirements of a wireless communication system.

This invention discloses a pixel array-based reconfigurable planar microwave device based on vanadium dioxide phase change thin film, belonging to the field of microwave device technology. The device includes a dielectric substrate, a metal ground plane, and a phase change patch array disposed on the dielectric substrate. The phase change patch array is composed of multiple vanadium dioxide thin film units. Each vanadium dioxide thin film unit has Cu thin film electrodes around its perimeter. The outer and inner electrodes are connected to pads via upper metal wiring, vias, and lower metal wiring, respectively, to form a localized current-carrying loop. The Joule heating generated by this localized current-carrying loop achieves selective phase change of the target vanadium dioxide thin film unit, forming different planar microwave conductive paths on the same device platform. This device features high structural integration, clear unit control, and good platform reusability.