22 results about "Dielectric rods" patented technology

The invention discloses a strong circular dichroism chiral metasurface design based on a QBIC resonance structure. The metasurface is composed of two groups of silicon medium rods which are symmetrical about an original point. Each group of medium rods comprises an elliptic cylinder and a long cube, the positions and heights of the elliptic cylinder and the long cube are different, and the elliptic cylinder structure is kept in a floating state. According to the invention, the circular dichroism can reach 0.86 when the wavelength is 657 nanometers, and the circular dichroism in the range of 650-664 nanometers is greater than 0.6, so that an enhanced circular dichroism response function is achieved. The characteristic is derived from a QBIC resonance structure formed by two groups of silicon dielectric rods. By continuously optimizing the structure, the metasurface with a stronger circular dichroism effect can be obtained. The invention provides a novel method for flexibly adjusting and enhancing circular dichroism in nano photonics. By virtue of the unique optical characteristics, the design of the invention is expected to be widely applied in the fields of biosensing, optical communication, quantum technology and the like.

The invention discloses a completely adjustable filter based on a non-electric contact resonator structure, which comprises a first filtering unit, a second filtering unit, a third filtering unit and a fourth filtering unit which are arranged in sequence, and the first filtering unit and the fourth filtering unit are in mirror symmetry. The second filtering unit and the third filtering unit are in mirror symmetry, and every two filtering units are connected through an inverted U-shaped probe; each of the first filtering unit and the fourth filtering unit comprises a first resonant cavity, a coupling probe, a first resonant metal column, a first dielectric rod, a first tuning sleeve and a second dielectric rod, and each of the second filtering unit and the third filtering unit comprises a second resonant cavity, a second resonant metal column, a third dielectric rod, a second tuning sleeve and a fourth dielectric rod. Stable electric contact does not need to be kept between the power source and the resonant cavity of the filter, the center frequency can be flexibly adjusted from 2.28 GHz to 2.65 GHz, and the absolute bandwidth can be flexibly adjusted from 34 MHz to 97 MHz.

An electromagnetic receiving device configured to discriminately react predominantly to an external electric field directed along an axis of said device, comprising a high-permittivity dielectric rod as receiving element, wherein said dielectric rod is oriented along said axis and has a receiving end to be directed towards an object under study, and wherein the device is configured to be essentially resonant with a circularly cylindrical TM00 mode.

An example antenna system includes a plurality of dielectric rod stacks and a control circuit. The control circuit includes a plurality of independently controlled output circuit boards. Each independently controlled output circuit board includes a respective dielectric rod stack. The respective dielectric rod stack includes a plurality of respective dielectric rods. The control circuit selects: (i) the dielectric rod stacks, and (ii) the respective dielectric rods of the respective dielectric rod stack to adjust a beam of emitted or received radio frequency (RF) waves.

The invention relates to a metal organic carbon skeleton derivative composite material as well as a preparation method and application thereof. The metal organic carbon skeleton derivative composite material comprises a metal organic carbon skeleton and metal particles loaded on the surface of the metal organic carbon skeleton, the metal organic carbon skeleton comprises rare earth elements and an organic ligand; the metal organic carbon skeleton has a rod-like structure. A metal organic carbon skeleton provided by the invention comprises rare earth elements and can provide good wave-absorbing performance, a continuous three-dimensional conductive carbon network formed by mutual connection of rod-shaped structures can provide effective dielectric, and gaps, interfaces and holes formed among the rod-shaped structures can also significantly increase multiple reflection and scattering of electromagnetic waves, so that the wave-absorbing performance is improved. The dielectric size, the polarization mode and the loss mechanism of the material are synergistically promoted, and impedance matching is optimized, so that the wave-absorbing performance of the material is further improved.

The invention relates to a dielectric rod antenna, wherein the dielectric rod antenna comprises: a dielectric rod and an excitation element, in particular a waveguide, which receives one end of the dielectric rod in order to excite the dielectric rod, wherein the dielectric rod is designed for a desired frequency at which signals to be transmitted are emitted by the dielectric rod antenna; characterized in that the dielectric rod comprises a bandstop material which suppresses one or more harmonic frequencies of the desired frequency.

Lensed antennas are provided that include a plurality of radiating elements and a lens positioned to receive electromagnetic radiation from at least one of the radiating elements, the lens comprising a plurality of rods. The rods include dielectric material and / or unit cell structures with three-dimensional meta-material patterns. The rods can be formed of stacked rod members. The stacked rod members can be formed by a stacked series of the unit cell structures. The rods can have the same size and materials with different spacings, the same size and spacing and different materials, or different sizes with the same or different spacing, each configuration arranged to define different effective permittivities across a diameter of the lens.

The application discloses an L frequency band self-tracking feed source network adopting coaxial feed, and belongs to the technical field of satellite communication microwave antennas; the L frequency band receiving signal is transmitted along the axial direction of a shaped metal outer wall, eight stepped coaxial probes are symmetrically distributed along the axial direction of a dielectric rod at an angle of 45 degrees, one end of each of the coaxial probes is inserted into the shaped metal outer wall, and the other end of each of the coaxial probes is connected with a difference signal polarization synthesis network through a cable, the difference signal polarization synthesis network outputs two L frequency band TE21 mode circular polarization signals, four mushroom-shaped coaxial probes are symmetrically distributed along the axial direction of the dielectric rod at an angle of 90 degrees, one end of each of the coaxial probes is inserted into the shaped metal outer wall, and the other end of each of the coaxial probes is connected with a sum signal polarization synthesis network through a cable, and the sum signal polarization synthesis network outputs two L frequency band circular polarization signals. The shaped metal outer wall provides support for the coaxial probes. The application has the advantages of small volume, light weight, no need of debugging, large amount of manpower cost saved, and suitability for engineering promotion.

C-band small aperture directional radiation surface wave antenna unit, array antenna and phased array optimization method. Due to the dual restrictions of the radiation aperture size and the substrate material, the integrated array element number and conformal installation are limited and difficult to solve; in the present application, the balanced microstrip plate, the conversion plate and the waveguide transmission plate are sequentially arranged on the loaded floor, the thickness of the conversion plate decreases from one end close to the waveguide transmission plate to the other end away from the waveguide transmission plate, one side of the balanced microstrip plate is provided with a coaxial line feeder joint, the other side of the balanced microstrip plate is connected with one end of the conversion plate, the other end of the conversion plate is connected with one end of the waveguide transmission plate, the other end of the waveguide transmission plate is provided with a dielectric rod, one end of the dielectric rod is a connecting end, the connecting end of the dielectric rod is connected with the waveguide transmission plate, the other end of the dielectric rod is a suspended end, the width of the dielectric rod decreases from the connecting end to the suspended end, and the longitudinal section shape of the dielectric rod along the central axis of the thickness direction is wedge-shaped.

The invention discloses a modularized X-waveband small-sized broadband high-gain surface wave dielectric antenna, which comprises an antenna unit and a modularized assembly base, and is characterized in that the antenna unit is composed of a microstrip feeder and a 3D printing dielectric rod structure; a grounding plate of microstrip feed is provided with a DGS integrated with a V-shaped groove and a CSRR, a microstrip patch is slotted to adjust a feed point, a dielectric rod adopts an EH11 / HE11 mode, the refractive index of a core part is higher, the sectional area of the core part is gradually changed, a gap is reserved between the dielectric rod and the dielectric rod to optimize coupling, and a base is provided with an adaptive groove to insert an antenna unit. The small-size broadband high gain of the X-band dielectric antenna is realized, and the array is modularized and quickly spliced.

The application discloses a kind of dual circular polarized 3D printing multi-beam Luneberg lens antenna, using 3D printing metamaterial technology, including: Luneberg lens and feed antenna;Luneberg lens includes M concentrically arranged spherical layers;Each spherical layer includes a plurality of units with corresponding equivalent refractive index;Unit is composed of asymmetric dielectric rod mutually orthogonal in x, y, z three directions;Luneberg lens with asymmetric cross structure is different in response to incident horizontal polarization and vertical polarization, so that Luneberg lens realizes the conversion of dual linear polarization to dual circular polarization;Feed antenna is set at 45° polarization angle relative to the x axis of Luneberg lens;Feed antenna includes: a plurality of electromagnetic dipole antenna radiation structures, and each electromagnetic dipole antenna radiation structure introduces orthogonally arranged first feed port and second feed port.By switching the corresponding feed port, the polarization mode of the finally generated left-handed circular polarization or right-handed circular polarization can be easily changed.

The application discloses a kind of perception antenna array and its design method, comprising: nine identical structure embedded antenna unit, eight antenna units are uniformly circularly arranged around central antenna unit to accept signal from any direction, central antenna unit is used as calibration unit. Antenna unit successively utilizes the end-fire radiation mode and dielectric resonance mode of open waveguide antenna from low frequency to high frequency, low frequency band is lowered by loading dielectric rod Its lower limit cutoff frequency, improve directivity at the same time, weaken the influence of surrounding environment on its radiation performance. Due to the height restriction of dielectric rod, the traveling wave end-fire condition of dielectric rod is still not met at high frequency band, and the dielectric rod is designed as a dielectric resonator to work in dielectric resonance mode. The high-order mode inside radiates outward through the top discontinuity.

The invention discloses an antenna assembling device. The antenna assembling device comprises a feeding assembly, an assembling station and a first carrying assembly. Two first guide rails, two positioning assemblies, a first truss, a dispensing assembly and a first visual assembly are arranged on the assembly station, the two first guide rails are arranged at an interval, the first truss is arranged above the two first guide rails, the two positioning assemblies are arranged corresponding to the two first guide rails, the positioning assemblies are arranged on the corresponding first guide rails, and the dispensing assembly is arranged on the first visual assembly; the positioning assembly is slidably arranged relative to the first guide rail, and the dispensing assembly and the first visual assembly are arranged on the first truss in a spaced mode and slidably arranged relative to the first truss; the first visual component is used for identifying and acquiring information of the main body, the liner and the antenna; and the dispensing assembly is used for dispensing the main body, the liner and the antenna based on the information of the main body, the liner and the antenna, so that the antenna, the liner and the dielectric rod are assembled on the main body. In this way, the assembly precision is improved.

The present application relates to the field of making row medium box, especially to a kind of medium plate stabilizer for assisting single-row medium rod perforation.The present application provides a kind of medium plate stabilizer for assisting single-row medium rod perforation, which can batch medium rod perforation and ensure the consistency of the depth of medium rod perforation.A kind of medium plate stabilizer for assisting single-row medium rod perforation, including chassis, conveying roller, conveying belt, long support plate, lifting mechanism and plug rod mechanism, the upper portion of chassis is rotatably connected with conveying roller on both sides, conveying belt is wound between conveying roller, long support plate is rotatably connected between conveying roller, lifting mechanism for fixing and driving medium plate is arranged on long support plate, plug rod mechanism is arranged on long support plate.The present application controls magnetic attraction plate to adsorb medium rod, so that medium rod is penetrated into the hole of medium plate, thereby realizing automatic perforation, and production efficiency is higher, while the depth of medium rod penetration can be ensured to be consistent, thereby ensuring the quality of production.

The utility model discloses a C-band small-aperture directional radiation surface wave antenna unit and an array antenna thereof. Due to double limitation of the size of a radiation opening surface and the material of a substrate, the number of array elements integrated by the phased-array antenna and conformal installation limitation are difficult to solve at the same time; a balance micro-strip plate, a conversion plate and a waveguide transmission plate are sequentially arranged on a loading floor, the conversion plate is sequentially decreased from one end close to the waveguide transmission plate to the other end far away from the waveguide transmission plate, the balance micro-strip plate is provided with a coaxial line feeder connector, and the waveguide transmission plate is provided with a dielectric rod. The width of the medium rod is gradually reduced from the connecting end to the suspended end; a plurality of air holes are formed in the medium rod, the air holes are round holes, and the hole diameter of the air holes is smaller than or equal to one fifth of the maximum width of the medium rod; a gradually-changing notch is formed between the top side of the loading floor and the lower side of the medium rod, and the width of the gradually-changing notch is sequentially decreased from the connecting end to the suspended end.

The invention relates to a dielectric rod antenna, the dielectric rod antenna comprising: a dielectric rod and an excitation element, in particular a waveguide tube, which receives one end of the dielectric rod in order to excite the dielectric rod, the dielectric rod being configured for a desired frequency at which signals to be transmitted from the dielectric rod antenna are emitted; characterized in that the dielectric rod comprises a band-stop material which suppresses one or more harmonic frequencies of the desired frequency.

This invention discloses a liquid dielectric rod antenna with reconfigurable polarization, comprising an antenna housing, a metal waveguide, a loading container, an RF coaxial probe, and a metal cylinder. The antenna housing is mounted on the metal waveguide, with helical first to third channels arranged along its axis. The loading container has excitation channels passing through its two sides and sealed to the container. The metal waveguide encloses the loading container and has mounting holes communicating with the excitation channels. The inner conductor of the RF coaxial probe extends into the excitation channels and connects to the metal cylinder. The loading container is filled with dimethyl silicone oil. When tetrahydrofuran is injected into the first channel, the dielectric rod antenna operates in circular polarization mode; when tetrahydrofuran is injected into the first to third channels simultaneously, the dielectric rod antenna operates in linear polarization mode. This invention solves the problem that traditional dielectric rod antennas can only operate in a single polarization mode, and has great potential in future wireless communications.

The present invention relates to a broadband connector (100) for broadband communication, comprising: a housing (101), wherein the housing (101) includes a cavity (106); a dielectric rod waveguide (103) disposed at least partially within the cavity (106); at least one dielectric component (104) disposed within the cavity (106), wherein the at least one dielectric component (104) is configured to hold the dielectric rod waveguide (103) within the cavity (106); and at least one flange (102) at an end of the housing (101), wherein the at least one flange (102) includes a central opening (105) for receiving a portion of the dielectric rod waveguide (103).

This invention relates to the field of quartz glass sleeve fabrication technology, and more particularly to a method for fabricating quartz glass sleeves for ultra-low loss optical fibers. The invention utilizes photocurable nanocomposite materials and solution doping to prepare functionalized glass core rods with low refractive index and rare-earth ion doping. A layer of high-refractive-index germanium-doped quartz glass is deposited on the surface of this core rod using an improved in-rod vapor deposition technique, forming a composite dielectric rod. Multiple such composite dielectric rods are then inserted into holes pre-drilled in a standard quartz sleeve to assemble the final functionalized sleeve. This method, by introducing an array of dielectric rods with a specific refractive index distribution, forms a periodic modulation structure in the optical fiber, effectively coupling and dissipating high-loss high-order modes while maintaining low-loss transmission of the fundamental mode. This results in an optical fiber that maintains ultra-low intrinsic loss while possessing excellent bending resistance.

This invention discloses a tree antenna and its adaptive frequency sweeping method, comprising a tree-mounted body and a curved conformal Vivaldi radiator. One or more conformal Vivaldi radiators are attached to any position on the surface of the tree-mounted body and are in contact with it. The surface of the conformal Vivaldi radiators is covered with a shell of the same color as the tree-mounted body. Based on the principle of dielectric rod antennas, this tree antenna utilizes trees to enhance electromagnetic field radiation and gain. Combined with adaptive frequency sweeping technology, it adaptively adjusts the transmission frequency band of electromagnetic signals for different trees, achieving efficient electromagnetic signal transmission and reception. The structure is simple, economical, and environmentally friendly, and has application value in agriculture, forestry, and other fields.

The application discloses a large-illumination-angle LC dual-frequency dielectric feed network and belongs to the technical field of satellite communication microwave antennas; the network comprises a shaped metal outer wall, a shaped dielectric rod, four dielectric-wrapped coaxial probes, four coaxial probes, an L-frequency polarization synthesis network and a C-frequency polarization synthesis network; the shaped dielectric rod is used for transmitting L-frequency and C-frequency receiving signals along an axial direction thereof, the four coaxial probes are symmetrically distributed along the axial direction of the dielectric rod at an angle of 90 degrees, one end of each coaxial probe is inserted into the shaped metal wall, and the other end of each coaxial probe is connected with the L-frequency polarization synthesis network through a cable to output two L-frequency circularly-polarized signals, and the four dielectric-wrapped coaxial probes are symmetrically distributed along the axial direction of the dielectric rod at an angle of 90 degrees, one end of each dielectric-wrapped coaxial probe is inserted into the shaped dielectric rod, and the other end of each dielectric-wrapped coaxial probe is connected with the C-frequency polarization synthesis network through a cable to output two C-frequency circularly-polarized signals; the network has small volume and light weight, does not need to be debugged, can save a large amount of labor cost and is suitable for engineering promotion.

Video push-cables, and methods for manufacturing video push-cables are disclosed. One embodiment may include an insulated push-cable with a fiberglass rod structural center member. A parallel bonded conductor including two separately insulated conductors is positioned along, and touches the center structural member along the length of the push-cable. The two conductors are insulated so that they are substantially equidistance from each other along the length of the center structural member. Since the parallel bonded conductor controls the distance between the two conductors, they are unlikely to short out if accidentally cut or otherwise damaged. In another embodiment, a push-cable fiberglass rod structural center member is surrounded by multiple concentric layers including a braided conductive layer, a layer of fiberglass rods and dielectric rods, a second braided conductive layer, and an insulated jacket. Other layers may be included.