573 results about "Feed line" patented technology

The invention provides a double-ring microwave sensor combination which is composed of two microwave annular sensors which are located on the upstream and the downstream of a measuring pipeline respectively and are the same in structure, each microwave annular sensor comprises a coaxial feeder terminal, an annular pole plate and a shielding layer, and the annular pole plate is tightly attached to the outer wall of the measuring pipeline. The coaxial feeder terminal is electrically connected with the annular polar plate; the shielding layer is longer than the annular polar plate and is grounded; the coaxial feeder terminals of the two microwave annular sensors are both used as the access ends of microwave excitation signals and the receiving ends of microwave response signals. The invention also provides a structure optimization method of the double-ring microwave sensor combination and a method for measuring the related flow velocity of the inclined oil-water two-phase flow by using the double-ring microwave sensor combination. According to the invention, related flow velocity measurement of inclined oil-water two-phase flow under a complex flow pattern can be realized.

An array antenna (100) having a layered configuration. The array antenna comprises a radiation layer (110) comprising a plurality of radiation elements (111) and a distribution layer (120) facing the radiation layer. The distribution layer is arranged to distribute a radio frequency, RF, signal to the plurality of radiation elements. The distribution layer comprises at least one distribution layer feed (121) and at least one first waveguide (122) arranged to guide the RF signal between at least one distribution layer feed and at least one radiation element. The array antenna further comprises at least a second waveguide (130) connected to at least one distribution layer feed (121). Any of the first (122) and the second (130) waveguides comprises plastics with a first type of surface treatment (313), where the first type of surface treatment comprising metallization. At least one radiation element is a dummy element terminated by an attenuation section, where the attenuation section is arranged on any of the waveguides (122, 130) connected to the dummy element and that comprises plastics. The attenuation section comprises a second type of surface treatment (314) arranged to attenuate the RF signal.

The invention discloses an intelligent research and judgment method and device for a distribution feeder fault based on traveling wave characteristics. In the operation process of the power distribution feeder line, forming time sequence original sampling data based on a unified time service reference, determining a traveling wave disturbance event and generating candidate traveling wave data; constructing a traveling wave time sequence consistency criterion based on the corresponding relationship between the traveling wave head first arrival time and the unified time service reference, and screening to obtain an effective traveling wave feature set; performing correlation analysis on the effective traveling wave feature set and historical operation feature data of the power distribution feeder to form a target traveling wave feature set; according to the time difference relation between the first arrival time of the wave head of the traveling wave in the target traveling wave feature set, the traveling wave propagation distance is calculated to determine the fault occurrence position, meanwhile, the polarity direction of the traveling wave and the amplitude variation of the traveling wave are integrated, the fault type and grounding characteristics are researched and judged, and a fault research and judgment result is output. According to the invention, the accuracy and reliability of power distribution feeder fault positioning and type identification can be effectively improved.

The invention provides an FTU-DTU cooperative power distribution terminal recording data uploading method and system, and the system comprises a feeder terminal unit which is used for collecting feeder electrical quantity data, generating a recording file when a fault is detected, and transmitting the recording file to a data transmission unit; and the data transmission unit is used for receiving the wave recording file, compressing the wave recording file, adaptively selecting a communication protocol according to a real-time network state, and uploading the compressed wave recording file to a master station system.

An antenna module includes dielectric substrates, ground electrodes, radiation electrodes, and a feed line. The dielectric substrates are flat. A third dielectric substrate is connected to rear surfaces of the first and second dielectric substrates and is rigid. A first radiation electrode is disposed at the first dielectric substrate closer to a top surface with respect to a first ground electrode. A second radiation electrode is disposed at the second dielectric substrate closer to a top surface with respect to a second ground electrode. A third ground electrode is disposed at a third dielectric substrate to electrically connect the first and second ground electrodes. The feed line is disposed at the third dielectric substrate to transmit a high-frequency signal from the first dielectric substrate to the second dielectric substrate. A normal direction of the first dielectric substrate and a normal direction of the second dielectric substrate differ from each other.

The invention relates to the technical field of mobile phone antennas, in particular to a mobile phone antenna and electronic equipment for exciting a floor characteristic mode based on a shunt feed technology, and the mobile phone antenna comprises a dielectric substrate, an antenna radiation metal patch on the outer side of the dielectric substrate, a metal floor arranged below the dielectric substrate, a low-frequency inverted-F antenna and a power divider, a first low-frequency feed port and a second low-frequency feed port are respectively arranged on corresponding radiation patches on two sides of the metal floor, and the two feed ports are simultaneously and electrically connected with an output end of the power divider through feeder lines, so that parallel feed of the low-frequency inverted-F antenna is realized, low-frequency characteristic modes of two long sides of the metal floor are simultaneously excited, and the low-frequency inverted-F antenna is formed. The low-frequency-band radiation efficiency is improved, the working bandwidth is expanded, and integration with a radio frequency circuit of the whole mobile phone can be completed only through a single excitation source.

The invention, which relates to the technical field of modern communication, discloses a metasurface-based high-gain low-profile dual-circularly polarized antenna comprising a first dielectric plate, a second dielectric plate arranged below the first dielectric plate, and a metasurface structure arranged above the first dielectric plate. Three rows and three columns of periodically arranged metasurface structures are arranged above the first dielectric plate, a multi-level cooperative working mechanism is constructed by combining 45-degree symmetrical composite gaps etched in a layer indirect floor and a microstrip feeder line which is orthogonally arranged on the lower layer, and the metasurface array realizes high-gain radiation by regulating and controlling the phase of electromagnetic waves. The composite slot structure efficiently converts microstrip line energy into an orthogonal degenerate mode through non-contact coupling, circular polarization purity is guaranteed, the axial ratio bandwidth is expanded to 24.2%, an orthogonal microstrip feeder line forms a 90-degree phase difference through accurately controlled size, high isolation and stable standing-wave ratio of double ports are guaranteed, and the antenna has a wide application prospect. And finally, dual-circular-polarization independent radiation is realized in a 5mm low-profile structure.

An antenna package includes an antenna device and a circuit board bonded to the antenna device. The circuit board includes a core layer, a feeding line formed on the core layer and bonded to the antenna device, and a CPW ground formed on the core layer to be physically separated from the feeding line and the antenna device.

The invention belongs to the technical field of microwave antennas, and particularly provides an ultra-low-profile wide-angle scanning ultra-wideband tight coupling phased-array antenna based on double mountain-shaped dipoles. The ultra-wideband antenna comprises an ultra-low-profile wide-angle scanning ultra-wideband radiation structure (I) based on double-E-shaped dipoles, namely an improved double-E-shaped dipole radiation structure; a feed strip line and a balun structure (II), namely a strip line feeder using a gradually changed defected ground on a vertical plane and a balun structure at the tail end; and the feed microstrip line structure (III) is a microstrip line feeder line on a horizontal plane. According to the invention, the improved double-E-shaped radiation structure is applied to the tightly-coupled antenna, which is equivalent to the introduction of a plurality of LC parallel matching branches in a unit aperture, so that the impedance matching of an array can be greatly improved, especially the impedance matching of low frequency is improved, the low-frequency bandwidth is expanded, and the scanning capability is improved at the same time.

A plasma processing apparatus includes a radio-frequency (RF) power supply; a pair of plasma electrodes, and a matcher disposed between the pair of plasma electrodes and the RF power supply. The matcher includes an RF feed line supplied with RF power from the RF power supply; a ground line; a first load line connected to one of the plasma electrodes; a second load line connected to the other of the plasma electrodes; an impedance matching circuit connected to the RF feed line, the first load line, the second load line, and the ground line, and including variable reactance elements; an RF sensor that is provided in the RF feed line and detects the RF power; a voltage sensor that detects a first peak value; and a matcher controller that controls the variable reactance elements by inputting detected values from the RF sensor and the voltage sensor.

The invention discloses a dual-band dual-linear polarization reconfigurable folding transmission-reflection array antenna, which comprises an upper-layer metasurface, a lower-layer metasurface and a feed source antenna, the upper-layer metasurface is provided with 12 * 12 first unit structures, and each first unit structure comprises a first metasurface metal patch, a first dielectric substrate, a second metasurface metal patch, a second dielectric substrate and a third metasurface metal patch which are connected from top to bottom; the lower-layer metasurface is provided with 12 * 12 second unit structures, and each second unit structure comprises an annular gap metal patch, a third dielectric substrate and a bottom-layer feeder line which are connected from top to bottom; two PIN diodes are integrated in an annular gap of the annular gap metal patch, and the annular gap metal patch is connected with a bottom feeder line located on the upper surface of the third dielectric substrate through a feed probe; and a 2 * 2 unit size is reserved in the center of the lower-layer metasurface and is used for placing a feed source antenna. According to the invention, dual-frequency dual-linear polarization bidirectional wave beam scanning is realized, and the low-profile characteristic is realized.

Provided is an antenna module including a first antenna patch for radiating electromagnetic energy of a first frequency band, a second antenna patch for radiating electromagnetic energy of a second frequency band different from the first frequency band, and both the first antenna patch and the second antenna patch spaced apart from a ground structure in a first direction, and a feed structure spaced apart from each of the first antenna patch and the second antenna patch, the feed structure being between the first antenna patch and the second antenna patch, the feed structure being connected to the ground structure, and the feed structure being configured to provide an RF signal to the first antenna patch and second antenna patch, and the feed structure including a horizontal feed line extending in a second direction intersecting the first direction, and a vertical feed line extending in the first direction.

This invention provides a broadband circularly polarized slot antenna for partial discharge detection in high-voltage electrical equipment, comprising a first dielectric substrate, a second dielectric substrate, a coupled feed structure, an annular slotted metal patch, a metal ground, a shorting pin, a metal post, and a coaxial line. The first dielectric substrate is disposed parallel to the upper center of the second dielectric substrate. The coupled feed structure is printed on the upper surface of the first dielectric substrate, the annular slotted metal patch is printed on the lower surface of the first dielectric substrate, and the metal ground is printed on the upper surface of the second dielectric substrate. An annular slot is formed in the center of the annular slotted metal patch, and the coupled feed structure is coupled to the annular slot. This invention can better match the complex electromagnetic environment formed by multiple reflections inside high-voltage equipment, thereby improving the acquisition efficiency and detection reliability of partial discharge signals, thus completely solving the detection blind zone problem caused by the random polarization of discharge signals in traditional linearly polarized antennas.

The invention discloses an ultra-wideband miniaturized band-pass filter based on slot lines and defected ground resonators, which belongs to the technical field of communication and comprises three metal layers, two dielectric layers and metal holes. The three metal layers comprise a top metal layer, a middle metal layer and a bottom metal layer from top to bottom, and the bottom metal layer is a ground plane; the metal holes penetrate through the three metal layers and the two dielectric layers; the two dielectric layers comprise a first dielectric layer and a second dielectric layer, the first dielectric layer is located between the top metal layer and the middle metal layer, and the second dielectric layer is located between the middle metal layer and the bottom metal layer; the top metal layer comprises a CPW feeder line and a slot line resonator, and LPUs are embedded in the CPW feeder line; the middle metal layer comprises a DGS resonator; and the slot line resonator and the DGS resonator are electromagnetically coupled to form a passband together. According to the invention, ultra wide band and miniaturization are realized through coupling of the slot line and the defected ground resonator.

The invention discloses AR glasses, and relates to the technical field of AR glasses, and the AR glasses comprise an optical machine module, an optical lens, and an antenna. The optical lens at least comprises a first area and a second area different from the first area; light emitted by the ray machine module enters the optical lens in the first area; the projection of the antenna on the optical lens is located in the second area; the antenna comprises a metal area, a bonding pad area and a feed coaxial line. The metal area is provided with a gap formed by slotting, and the feed end of the gap is electrically connected to the bonding pad area; at least part of the feed coaxial line is located in the bonding pad area and connected with the feed end, so that the feed end connected with the feed coaxial line enters an open circuit state, namely, the feed coaxial line is directly used as a feed line of the gap, a conventional coupling mode is avoided, the miniaturization design of the bonding pad area is achieved, and the size of the antenna is reduced. Therefore, the bonding pad area, the light machine module and the camera module can be hidden in the glasses frame together, so that the miniaturization requirement of AR glasses is met.

The invention relates to a dual-polarization 2bit transmission type metasurface unit working in a Ka wave band, which can realize four-state phase regulation and control of horizontal polarization and vertical polarization on a specified frequency band. And an implementation scheme with a better system integration advantage is provided for the high-frequency multi-polarization reconfigurable antenna system. The unit is composed of two groups of linearly polarized 2bit reconfigurable units which are orthogonally arranged, and each unit is composed of a pair of active receiving antennas at the bottom and a pair of active transmitting antennas at the top; a pair of PIN diodes are respectively integrated in a receiving antenna and a transmitting antenna, and four discrete phase states are realized through combination of switch states, so that 2-bit phase regulation and control are completed. The invention has the following advantages: 1, low transmission amplitude loss and precise phase gradient characteristic are shown in the dual-polarization Ka wave band, and high-precision wave beam regulation and control can be realized; 2, due to the fact that dual-line polarization adopts a synchronous regulation and control mode, the unit can complete phase control only through two feeder lines, and compared with an independent polarization control scheme, the complexity of a feed and bias network is remarkably reduced, so that interference of a bias circuit on electromagnetic radiation characteristics is effectively reduced; and 3, the emergent wave beam of the transmission type metasurface is located on the same side with the transmission type metasurface, so that the shielding of the feed source can be reduced, the interference of a reflection path is avoided, the aperture efficiency is improved, and the sidelobe is reduced.

This invention discloses a high-gain vehicle-mounted optically transparent antenna with improved radiation pattern, operating in the 0.74-0.87 GHz range. The invention includes a substrate, an antenna body, and a system ground plane. The substrate comprises a PET film layer, an OCA adhesive layer, and a PC dielectric substrate. The antenna body consists of two trapezoidal radiating patches, a reverse cancellation strip, a feed line, and a system ground plane located on the same layer as the antenna. The two trapezoidal radiating patches are connected by the reverse cancellation strip, which links their longer base edges. Its transparency is primarily achieved through the use of a transparent substrate material and a metal mesh structure composed of thin and fine metal wires. The cascaded trapezoidal radiating patches and the connected reverse radiation strip achieve performance improvements such as high gain, wide bandwidth, and improved horizontal radiation pattern nulls. This invention can achieve optical transparency of over 70%, radiation efficiency of over 65%, and radiation pattern null improvement of over 3 dB in the operating frequency band.

The invention relates to a miniaturized broadband power dividing filter applied to an X frequency band. The antenna comprises a metal layer and a dielectric substrate layer, and the metal layer is divided into two layers including an upper metal layer and a lower metal layer; the upper metal layer comprises a section of input feeder line, a first output feeder line, a second output feeder line, an isolation resistor, a first filtering branch knot and a second filtering branch knot, and each of the first filtering branch knot and the second filtering branch knot comprises two same dual composite left and right hand resonance units; the lower metal layer is of a metal grounding plate structure, and two grooves are formed in the metal grounding plate. According to the invention, the sub-wavelength characteristic is fully utilized, the miniaturization of the circuit is realized, the defect of overlarge size of a traditional cascade scheme is effectively overcome, and the circuit is suitable for a high-frequency (x-waveband) application scene. The whole structure is based on the double-sided microwave dielectric plate, has the advantages of simple processing and low cost, and is suitable for large-scale production.

To provide an antenna device capable of obtaining sufficient radiation characteristics even when arranged in a state of being close to a metal member, and a detection device.SOLUTION: The antenna device includes an annular substrate including a first surface, a second surface, and an opening penetrating between the first surface and the second surface, an annular antenna element provided on the first surface and surrounding the opening, a first feed line provided on the first surface and including a feed terminal connected to the antenna element, a second feed line provided on the second surface and including a connection terminal connected to a communication unit, the second feed line including an overlapping portion that overlaps a first portion of the first feed line in plan view, and a through hole that penetrates the substrate and connects the first feed line and the overlapping portion of the second feed line.SELECTED DRAWING: Figure 4

A multi-stage filtration system for filtering a feed is described. The system comprises a plurality of filtration units and one or more concentrate lines. A first filtration unit is arranged to be connected to a feed line for feeding the feed to the filtration unit. The concentrate line is connected to the first filtration unit for collecting a concentrate filtered out of the feed by the first filtration unit. A second filtration unit is connected to the concentrate line for feeding the concentrate to the second filtration unit. The system is configured for selectively switching at least one further filtration unit between a first operation mode, in which the filtration unit is arranged to filter the feed or concentrate from one of the lines, and a second operation mode in which the filtration unit is arranged to filter the concentrate from another of the lines.

The utility model relates to the field of instrument equipment especially relates to a kind of instrument equipment with internet of things function, including internet of things water meter body, antenna assembly is equipped on internet of things water meter body, antenna assembly includes feeder, feeder one end is connected with internet of things water meter body, feeder other end is provided with antenna head body, feeder outer wall is slidably sleeved with installation component, installation component includes mounting plate, the upper side of the one side of mounting plate, lower side is respectively equipped with support frame, U-shaped support frame;In the utility model, through the antenna assembly equipped on internet of things water meter body, water meter reading, state information is transmitted to water management platform periodically or on demand through wireless communication network, and through the setting of installation component, antenna head can be installed with the wellhead wall surface to be installed, and the length of excess feeder can be neatly wound, to avoid cable in disorderly manner to hang or accumulate.

The application relates to a reconfigurable metasurface for electrically-controlled scanning of a real-aperture microwave radiometer, which comprises a plurality of array-distributed basic units, the basic unit comprising a top metal patch, a first dielectric layer, a metal reflection layer, a second dielectric layer and a bottom metal layer which are sequentially stacked from top to bottom; the top metal patch comprises two cross-connected I-shaped patches and a triangular metal branch located in the cross region and having a certain gap with the I-shaped patch; the I-shaped patch comprises a straight arm and end arms located at both ends of the straight arm and having a certain gap with the straight arm; a PIN diode is connected between the straight arm and the end arms; the end arms are connected with each other through a metal feed line, and an isolation resistor is arranged on the metal feed line; the application dynamically controls the reflection phase according to the working state of the diode combination, and has high reflectivity and reflection bandwidth and small loss.

The application discloses a multi-mode absorbing frequency selective surface with adjustable wave absorbing capacity, which comprises a metal pattern layer, a first dielectric substrate, a metal back plate, a second dielectric substrate and a metal feed line layer arranged in sequence from top to bottom, wherein the metal pattern layer comprises a plurality of metal unit structures arranged in an array, each metal unit structure comprises a polygonal metal sheet located at the center of the unit, metal bands extending from the periphery of the polygonal metal sheet, and metal arms extending from the four corners of the unit, the metal arms comprise two independent metal structures, the polygonal metal sheet and the metal bands are connected to each other through a first varactor diode, the two independent metal structures are connected to each other through a second varactor diode, and the metal arms in adjacent metal unit structures jointly form a new rotating cross structure. The independent feed line network is built through the metal through hole, so that the structure is divided into two independently regulated parts, and the whole has single and double adjustable wave absorbing modes.

The present disclosure provides a dual-polarized antenna and an electronic device, and belongs to the technical field of communication. The dual-polarized antenna comprises a radiation structure, a first feed line, a second feed line, a first phase shift structure, a second phase shift structure and a third phase shift structure. The first phase shift structure is electrically connected with the radiation structure through the first feed line, the second phase shift structure is electrically connected with the radiation structure through the second feed line, and the feeding directions of the first feed line and the second feed line are different. The first phase shift structure and the second phase shift structure are also electrically connected with the third phase shift structure. The first phase shift structure and the second phase shift structure are located in different layers from the third phase shift structure, and the maximum phase shift degrees of the first phase shift structure and the second phase shift structure are both less than the maximum phase shift degree of the third phase shift structure.

This invention discloses an integrated monitoring system and method for temperature, humidity, and power parameters of an antenna feeder system, belonging to the field of communication equipment monitoring technology. It includes a data acquisition module for acquiring relevant data of the antenna feeder, including the temperature of key components such as parallel twin lines, coaxial cables, microstrip lines, and waveguides, and generating a temperature database. A data processing module is used to construct a temperature matrix based on the temperature database. The construction steps include differentiating the humidity levels in the area where the antenna feeder is located, including identifying the most frequently occurring humidity levels in the area, and providing a humidity range based on the humidity, including humidity levels less than or greater than 3%. This invention achieves real-time early warning and scientific verification of operational anomalies by acquiring and analyzing temperature data of key components of the antenna feeder, identifying thermal risk areas based on humidity conditions, quantifying the impact of temperature changes on power in real time, and setting risk thresholds.

An antenna-based system for hyperthermia treatment of breast cancer, consisting of: a G-shaped microstrip patch antenna configured for operation at an ISM frequency of 434 MHz and having dimensions of 3.6 cm × 3.8 cm × 1.6 cm; an aluminum cavity chamber to accommodate the G-shaped microstrip patch antenna; a coaxial feed line configured to allow an impedance matching of 50 ohms to the G-shaped microstrip patch antenna; a bolus of deionized water configured to surround the aluminum cavity chamber, wherein the bolus of deionized water is further configured to serve as a cooling medium for controlling the skin surface temperature, and wherein the bolus of deionized water is further configured to reduce hotspots and improve the radiation efficiency of the G-shaped microstrip patch antenna; and A polyethylene film was positioned between the G-shaped microstrip patch antenna and the bolus of deionized water to prevent interference between the G-shaped microstrip patch antenna and a breast tissue phantom.

An apparatus comprising an antenna array including multiple planar slot antenna elements with integrated feedlines, wherein the positions, orientation angles, and feedline lengths of the antenna elements are mutually uncorrelated to produce spatial and temporal incoherence. The apparatus may include a substrate having irregular ridge faces supporting the antenna elements, a switching circuit configured to activate subsets of the antenna elements according to randomized or pseudo-random sequences, and a controller operatively coupled to the switching circuit.

The application provides a power distribution line multi-pseudo fault point checking method based on a multi-frequency signal, the checking method comprises a single-ended traveling wave positioning method, a traveling wave positioning terminal for traveling wave positioning is installed at a first end of a line feeder of a transformer substation, current signals collected by power distribution terminals at power distribution lines are collected, and pseudo fault points are excluded according to current frequency information of the current signals and position information of the traveling wave positioning, so that a real fault point is determined; the power distribution terminal comprises a pole-mounted switch and a fault indicator; the application has high economy, can accurately identify the real fault position from multiple pseudo fault points, and can solve the problems of serious pseudo point interference and difficult discrimination of the real fault point in the single-ended method.

According to an embodiment of the present disclosure, provided is a phase shifter comprising: at least one base panel extending in a longitudinal direction; at least one wall panel extending from at least one of both opposing sides in a transverse direction of each of the at least one base panel in a direction parallel to a height direction perpendicular to the at least one base panel; at least one support body fixed to one surface of each of the at least one base panel; at least one feed line supported by the at least one support body so as to be spaced apart from one surface of each of the at least one base panel in the height direction; and at least one dielectric configured to be movable in a direction parallel to the longitudinal direction, wherein at least a portion of each of the at least one dielectric is disposed between each of the at least one wall panel and each of the at least one feed line.

The utility model provides a dielectric antenna for wireless communication, and relates to the technical field of dielectric antennas. The dielectric antenna for wireless communication comprises a mounting plate and a bottom plate arranged at the top of the mounting plate, one end of the top of the mounting plate is provided with a positioning assembly, the positioning assembly is used for positioning one end of the bottom plate, and the top of the bottom plate is provided with a first threaded hole. According to the dielectric antenna for wireless communication, through the arrangement of the positioning assembly, equipment can be installed and fixed on the installation plate through one screw, and when the antenna needs to be disassembled and replaced, disassembly or installation can be completed only by screwing one screw, so that later maintenance of the equipment is facilitated, and the maintenance efficiency is improved. Meanwhile, the spiral feeder is arranged, so that when the equipment deflects in the direction, the feeder can have allowance for cooperative use, the situation that the feeder is loosened due to direction deflection can be avoided, the service life of the equipment is effectively prolonged, and actual application is facilitated.