1861 results about "Feed line" patented technology

The invention discloses a directional diagram reconfigurable antenna capable of switching feed through an MEMS switch, and belongs to the field of radio frequency front-end devices. The directional diagram reconfigurable antenna is composed of a micro-strip radiation unit, a guide parasitic unit, a composite beam ohmic contact type MEMS switch, a one-to-four feed network, a direct current bias line, a test patch bonding pad, a coplanar waveguide, a gradual change micro-strip line, a dielectric substrate and a metal ground backboard. The two-stage MEMS switches are erected on the one-to-four feed network, when the two-stage switches on a certain feeder line are turned on, radio frequency current can flow to the corresponding basic radiation unit through the feeder line to generate an inclined beam facing the quadrant, and the two basic radiation units on the front side can be enabled by simultaneously turning on the four switches on the front side to generate an inclined beam facing the quadrant. And generating an inclined beam in the front side positive direction. The antenna adopts a single-layer board design, the dielectric substrate does not need to be punched, the structure is simple, manufacturing is convenient, the adopted MEMS switch is small in loss and high in isolation degree, and rapid printing and manufacturing can be achieved through the surface etching process.

According to embodiments, provided is an antenna comprising: a substrate of a square shape including first to fourth corners; a radiation unit disposed on the substrate and including a first radiation unit and a second radiation unit that radiate a wireless signal; a first feed line that applies the wireless signal to the first radiation unit; a second feed line that applies the wireless signal to the second radiation unit and has an extension line that perpendicularly intersects with an extension line of the first feed line; and a ground portion disposed on the substrate and spaced apart from the radiation unit and having at least a portion of a boundary area including a step shape, wherein the ground unit includes a shared ground unit that is disposed diagonally from a first edge to a third edge, is located between the first radiation unit and the second radiation unit, and performs impedance matching of the first radiation unit and the second radiation unit.

The invention provides a K-band broadband dual circularly polarized antenna applied to the satellite internet, and belongs to the field of circularly polarized antennae, the K-band broadband dual circularly polarized antenna comprises a radiation unit, a first dielectric layer, a metal ground layer, a bonding layer, a second dielectric layer and a feed network which are stacked from top to bottom, the radiation unit comprises two first radiation patches and two second radiation patches, the first radiation patch is provided with two long rectangular grooves which are vertically intersected, the second radiation patch is provided with two short rectangular grooves which are vertically not intersected, the first radiation patch and the second radiation patch are respectively connected to the metal ground layer through metal columns, and the metal ground layer is provided with a first coupling gap and a second coupling gap. A first rectangular groove, a second rectangular groove, a third rectangular groove and a fourth rectangular groove are formed in the metal ground layer, and the feeder network comprises a first microstrip feeder and a second microstrip feeder; the antenna structure is low in profile, wide impedance bandwidth can be achieved, and the two feed ports can work in the same frequency range.

The present invention discloses a high polarization isolation dual-polarization tightly coupled ultra-wideband phased array antenna. It includes a dipole unit, a coaxial feed line, a metal reflective floor, a fishbone cross-shaped patch and a cross-shaped metal wall; the dipole unit includes a horizontal and two vertical dielectric substrates, and the vertical dielectric substrates are orthogonal to each other; two groups of coplanar and mutually perpendicular butterfly-shaped dipole units are printed on the lower surface of the horizontal dielectric substrate; a fishbone cross-shaped patch is embedded at the intersection of the ends of the dipole units, and there is a gap between the patch and the end of the dipole; a patch with an etched groove line is printed on one side of the vertical dielectric substrate; the patch is connected to the dipole; the microstrip line on the upper surface of the horizontal dielectric substrate is connected to the inner conductor of the coaxial feed line, and the dipole is connected to the outer conductor of the coaxial feed line; the fishbone cross-shaped patch is in contact with the cross-shaped metal wall. The present invention realizes high polarization isolation and low cross-polarization of the dual-polarization tightly coupled ultra-wideband phased array in a lower frequency band without the need for a complex feeding network.

According to some embodiments, a method is performed by a wireless device capable of operating in a non-terrestrial network (NTN). The method comprises determining an amount of time until a service link or feeder link switch and, based on the determined amount of time, modifying a radio link failure parameter used to determine when to declare a radio link failure (RLF).

The invention discloses a broadband reflection-free filtering antenna which is provided with a stop-band energy absorption structure, a high-low impedance microstrip line and a yagi-like radiator which are connected in sequence. The yagi-like radiator is composed of a pair of dipole arms and two pairs of bilateral parallel parasitic patches. Wherein the stop-band energy absorption structure is composed of two microstrip line band-stop filters, two grounded chip resistors, a section of folded phase line and a section of input microstrip feeder line. The two microstrip band-stop filters are respectively connected with a grounded chip resistor, and the two microstrip band-stop filters are connected through a folding phase line. The antenna is high in structural compactness, and meanwhile, the integrated design of the filter and the antenna and the ultra-wide non-reflection bandwidth are realized.

An antenna is provided. The antenna includes a feed line structure; a first low dielectric constant layer on the feed line structure; a first flexible layer on a side of the first low dielectric constant layer away from the feed line structure; a phase shifter on a side of the first flexible layer away from the first low dielectric constant layer; a first ground plate on a side of the phase shifter away from the first flexible layer; and a radiating plate on a side of the first ground plate away from the phase shifter. The first low dielectric constant layer has a dielectric constant in a range of 1.5 to 3. The first flexible layer has a Flexural modulus in a range of 0.01 to 10.0.

The invention provides a pilot frequency combiner and a multi-system access platform, the pilot frequency combiner comprises a first substrate waveguide resonant cavity, the first substrate waveguide resonant cavity is provided with at least two input feed line ends, the at least two input feed line ends are used for introducing excitation signals of different information sources, a second substrate waveguide resonant cavity is stacked on the first substrate waveguide resonant cavity, and the second substrate waveguide resonant cavity is used for feeding excitation signals of different information sources. The second substrate waveguide resonant cavity is provided with an output feeder end, and the second substrate waveguide resonant cavity and the first substrate waveguide resonant cavity share a cavity wall; the common cavity wall is provided with at least two through coupling holes, and the coupling holes are communicated with the first substrate waveguide resonant cavity and the second substrate waveguide resonant cavity, so that excitation signals input by the at least two input feeder line ends are transmitted to the second substrate waveguide resonant cavity, and are output to an external antenna radiation end after being combined by the output feeder line end. According to the pilot frequency combiner provided by the invention, the isolation degree of multi-band signals is relatively good, the frequency expansibility is also good, and the design flexibility is relatively high.

The invention discloses a packaged antenna and an antenna array based on a three-dimensional stacking technology, belongs to the technical field of packaged antennas, and solves the problem that an existing antenna process is difficult to realize integrated packaging. The active device receives and sends radio frequency signals in an electrical connection mode, the interval height of the rewiring layers is limited within 50 micrometers, and the packaging requirement of the three-dimensional stacking technology is met. The microstrip feeder feeds signals to the antenna radiation patches in a coupled feeding mode, electrical connection is not needed, occupied space is reduced, the bandwidth of the antenna can be increased in a mode of overlapping a plurality of radiation patches, the performance of the antenna is further optimized, the space size of overall active packaging is fully utilized, the antenna and an active device are integrally packaged, and the antenna and the active device are integrally packaged. The packaging cost is reduced, the low-cost design of the packaged antenna is realized, and the packaging antenna has good application prospect and economic value.

A calibration system includes a beamformer lattice including at least a first beamformer, the first beamformer corresponding to a first subset of antenna cells of a plurality of antenna cells including a plurality of feed lines extending between the first beamformer and each of the first subset of antenna cells, and the first beamformer including a first calibration section for comparing a reference signal to a non-reference signal; and a first calibration line corresponding with the first beamformer, wherein the first calibration line is configured to deliver a first reference signal (mTx) from the first beamformer to be received by a first antenna feed line for comparison with a first non-reference signal (Rx) in the first beamformer, and / or wherein the first calibration line is configured to deliver a second non-reference signal (Tx) from a second antenna feed line for comparison with a second reference signal (mRx) in the first beamformer.

A water filtration system is also disclosed. The water filtration system includes a regenerative media filter vessel, a filtrate line, a feed line, a recirculation line, a gas line, and at least one pump. A method of filtering water in a system comprising a regenerative media filter is disclosed. The method includes operating the system in a filtration mode, operating the system in a cleaning mode responsive to a differential pressure measurement across the regenerative media filter, operating the system in an aeration mode, operating the system in a pre-filtration mode after operating the system in the cleaning mode, operating the system in a drain mode, and operating the system in the filtration mode following the drain mode. A controller and non-transitory computer-readable medium having computer-readable signals stored thereon that define instructions that, as a result of being executed by the controller, instruct the controller to perform a method of operating a water filtration system are disclosed.

The invention relates to a circularly polarized quasi-absorption filtering phased-array antenna. A unit of the antenna comprises a multi-layer dielectric substrate, a semi-cured layer, a metal floor, a stacked patch and an orthogonal H-shaped gap, the first dielectric substrate is provided with a parasitic square loop, the second dielectric substrate is provided with a cross-shaped strip, and radiation zero points are introduced to the upper and lower edges of a passband respectively; the 3dB orthogonal directional coupler and the L-shaped feeder form a feed network, circularly polarized radiation is realized through slot coupling, and an isolation port of the 3dB orthogonal directional coupler is connected with a 50-ohm resistor, so that the energy of a lower stop band is absorbed, the energy of an upper stop band is reflected, and a quasi-absorption filtering characteristic is presented; the antenna is compact in structure and easy to process, has wide axial ratio bandwidth and good filtering performance, and when array scanning is 0-45 degrees, the overlapping impedance bandwidth is 12%, the axial ratio bandwidth is 15.8%, and the maximum scanning loss is 2.3 dB; the antenna is compact in structure and easy to process, has wide axial ratio bandwidth and good quasi-absorption filtering performance, and has huge potential in millimeter wave satellite communication application.

The dual-polarized antenna comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, a fourth dielectric substrate, a fifth dielectric substrate and a double-feed probe, the first dielectric substrate, the second dielectric substrate and the fifth dielectric substrate are stacked, one surface of the first dielectric substrate is provided with four centrosymmetric patch units, and the surface, close to the first dielectric substrate, of the second dielectric substrate is provided with a radiation patch coaxial with the patch units. A first I-shaped gap and a second I-shaped gap which are crossed, vertical and centrosymmetric are formed in the third dielectric substrate close to the second substrate surface, a plurality of first metalized via holes are formed in the periphery, and the gaps are coaxial with the patch unit; the fourth dielectric substrate is provided with a first T-shaped microstrip feeder line and a second T-shaped microstrip feeder line which are not in contact with each other, the periphery of the fourth dielectric substrate is provided with second metalized via holes which are in one-to-one correspondence with the first via holes, and the feeder lines are respectively corresponding to the I-shaped gaps; and the double-feed probe is respectively connected with the feed points of the first T-shaped microstrip feeder and the second T-shaped microstrip feeder through feed holes. By adopting the dual-polarized antenna, the port isolation and the wide-angle scanning range can be improved.

The invention discloses a dual-beam dual-circularly-polarized wide-angle scanning phased-array antenna, and belongs to the field of wireless communication. The antenna is composed of an antenna unit group. The antenna unit comprises a bottom metal floor, a fifth substrate, a 3dB bridge, a fourth substrate, an antenna metal floor, a third substrate, a second rectangular feeder line, a second substrate, a first rectangular feeder line, a first substrate and a radiation patch layer which are arranged from bottom to top; wherein the 3dB bridge is used for realizing signal transmission, and the two rectangular feeder lines have the same size and are orthogonally arranged; the radiation patch layer comprises four square metal patches and two feed discs; the square metal patches are separated through the L-shaped gaps and are connected with the antenna metal floor through the short circuit columns respectively, and the feed disc is connected with the rectangular feed line through the metal probe and connected to the output end of the 3dB bridge. The antenna unit adopts an equivalent magnetoelectric dipole form, the wide-angle scanning characteristic of the phased-array antenna is achieved, communication with two satellites can be achieved at the same time, and the overall communication efficiency is improved.

A water filtration system is also disclosed. The water filtration system includes a regenerative media filter vessel, a filtrate line, a feed line, a recirculation line, a gas line, and at least one pump. A method of filtering water in a system comprising a regenerative media filter is disclosed. The method includes operating the system in a filtration mode, operating the system in a cleaning mode responsive to a differential pressure measurement across the regenerative media filter, operating the system in an aeration mode, operating the system in a pre-filtration mode after operating the system in the cleaning mode, operating the system in a drain mode, and operating the system in the filtration mode following the drain mode. A controller and non-transitory computer-readable medium having computer-readable signals stored thereon that define instructions that, as a result of being executed by the controller, instruct the controller to perform a method of operating a water filtration system are disclosed.

The invention discloses a 10kV distribution transformer on-load voltage regulation control method and system, and relates to the technical field of transformer on-load voltage regulation, and the method comprises the steps: collecting the three-phase voltage and current of a low-voltage side of a distribution transformer and a tap switch gear signal, and loading a preset voltage regulation control mode and an oscillation region parameter; based on the acquired three-phase voltage and current of the low-voltage side of the distribution transformer and the tap switch gear signal, calculating a feeder comprehensive impedance parameter and a load reactive power parameter, and outputting a transformer operation state index; according to the transformer operation state index, the voltage regulation control mode and the oscillation area rule, current voltage out-of-limit and reactive power deviation are judged, and a voltage regulation strategy triggering instruction is generated according to the judgment result; and calculating upper and lower limit values of feed line correction voltage based on the voltage regulation strategy trigger instruction, and controlling the tap switch to execute voltage regulation action. According to the method, a combined calculation scheme of feeder comprehensive impedance and load reactive power is fused, and dynamic optimization of the triggering condition of the voltage regulation strategy is achieved.

The invention belongs to the technical field of antenna engineering, provides a tight coupling dipole antenna parameter optimization method based on an equivalent circuit model, and is used for solving the problems that a tight coupling dipole antenna based on full-wave simulation is low in design efficiency and poor in effect, and an existing equivalent model is low in precision and incomplete. According to the method, equivalent circuit models of a matching layer, a radiator and a feeder line of the tight coupling dipole antenna are respectively established, and an analytic relationship between key structure parameters of the tight coupling dipole antenna and circuit parameters in the equivalent circuit models is established, so that a complete equivalent circuit model is established; by means of efficient parameter optimization of the complete equivalent circuit model, on one hand, collaborative optimization design of the bandwidth, standing wave, scanning range and other performance of the tight coupling dipole antenna is achieved, and the antenna performance is globally optimal; and on the other hand, the full-wave simulation frequency required by parameter optimization is greatly reduced, so that the parameter optimization time is shortened, and the design efficiency is improved.

The invention relates to a coaxial microstrip antenna sensor for measuring the water holdup of an oil-water two-phase flow, which comprises an insertion body and an annular microstrip antenna arranged in a pipeline in the insertion body and used for transmitting a microwave signal; the pipeline outer annular microstrip antenna is arranged outside the measuring pipeline and is used for receiving microwave signals; wherein the insertion body is an insulator and is embedded into the center of the measuring pipeline, the axis of the insertion body is coaxial with the measuring pipeline, and a pipeline annular space is formed between the insertion body and the measuring pipeline; the annular microstrip antenna in the pipeline comprises an annular grounding polar plate, an annular radiation polar plate and a coaxial feeder line which are coaxially arranged, the annular grounding polar plate is embedded into the insert body and located on the inner layer, and the annular radiation polar plate is embedded into the insert body and located on the outer layer; the pipeline outer annular microstrip antenna used for receiving microwave signals is coaxially installed on the outer side of the pipe wall and comprises an annular radiation polar plate arranged on the outer wall of the pipeline, an annular shielding layer located on the periphery of the annular radiation polar plate and a coaxial feeder line.

An antenna module includes a dielectric substrate, a ground electrode disposed in the dielectric substrate, flat-plate-shaped radiating elements, feed lines, and a via electrode connected to the ground electrode. The radiating element is disposed opposite the ground electrode in the dielectric substrate. The radiating element is disposed between the radiating element and the ground electrode. The feed line extends through the radiating element and transmits a radio-frequency signal to the radiating element. The feed line transmits a radio-frequency signal to the radiating element. The feed line is electrically coupled to the radiating element at a position offset from a center of the radiating element in a first direction. The feed line is electrically coupled to the radiating element at a position offset from a center of the radiating element in a second direction different from the first direction.

The embodiment of the invention provides an antenna structure and communication equipment, relates to the technical field of radio communication, and is used for reducing the transmission loss of a feeder line in the antenna structure. The antenna structure comprises a radome, an antenna array assembly, a mounting seat and a connector, the radome is provided with a first accommodating cavity, the antenna array assembly and the mounting seat are both arranged in the first accommodating cavity, and the antenna array assembly is provided with a radiating surface and a back surface deviating from the radiating surface and is provided with a preset port; the mounting base comprises a mounting base body, the mounting base is located on the side where the back face of the antenna array assembly is located, and a second containing cavity is formed in the mounting base body; the connector is arranged in the second accommodating cavity, and the connector is electrically connected with the preset port.

The invention provides a passive antenna array beam forming test method and system, and relates to the technical field of beam forming test. According to the method, channel baseline parameters are established in a silencing environment, frequency hopping and channel switching are combined to realize multi-frequency-point synchronous sampling, a reference source and self-polling data are utilized to calculate a mutual coupling correction matrix and a feeder line consistency factor, and weight projection and equivalent aperture field generation are completed without changing physical wiring conditions; further extracting a main lobe direction, a beam width, a side lobe level and a scanning consistency index through far field transformation, and unwrapping and smoothing a frequency-point-crossing phase result; and meanwhile, generating a unique traceability identifier, establishing full-link association between a test condition and a result, and outputting a criterion conclusion. According to the method, the accuracy, efficiency and traceability of passive array beam testing are improved.

The invention discloses a broadband omnidirectional conformal long-slot antenna and a wireless communication device, the antenna comprises two antenna units which are arranged up and down, and the two antenna units relatively rotate around the center at an angle of 45 degrees. Each antenna unit comprises an annular metal resonant cavity, a first annular dielectric substrate, a metal ring, a second annular dielectric substrate and a microstrip metal feeder which are sequentially arranged from inside to outside, and a circle of annular long seam is formed in the center of the metal ring. According to the antenna, the slot is used for providing low-frequency resonance points, the microstrip open-circuit line is used for providing high-frequency resonance points, the antenna achieves double working frequency bands, the working bandwidth of the antenna is greatly expanded through the design, the problem that the bandwidth of the antenna is insufficient is solved, the antenna is designed in a circular ring shape, a double-layer directional diagram compensation design method is applied, and the antenna performance is improved. Therefore, the antenna can achieve the omnidirectional radiation performance, and the problem that a traditional cavity-backed slot antenna is difficult to radiate in an omnidirectional manner is solved.

According to embodiments, provided is an antenna comprising: a substrate of a square shape including first to fourth corners; a radiation unit disposed on the substrate and including a first radiation unit and a second radiation unit that radiate a wireless signal; a first feed line that applies the wireless signal to the first radiation unit; a second feed line that applies the wireless signal to the second radiation unit and has an extension line that perpendicularly intersects with an extension line of the first feed line; and a ground portion disposed on the substrate and spaced apart from the radiation unit and having at least a portion of a boundary area including a step shape, wherein the ground unit includes a shared ground unit that is disposed diagonally from a first edge to a third edge, is located between the first radiation unit and the second radiation unit, and performs impedance matching of the first radiation unit and the second radiation unit.

The invention relates to a distribution line state on-line monitoring system and a grounding fault diagnosis method, the system comprises a signal acquisition module, a collection preprocessing module and an analysis master station, the signal acquisition module is used for acquiring distribution line state and environmental data and sending the acquired data to the collection preprocessing module; the collection preprocessing module is used for receiving, storing and processing the data sent by the signal acquisition module, and actively or passively uploading the data to an analysis master station according to a data processing result; and the analysis master station is used for receiving or measuring the data stored by each collection preprocessing module, and carrying out line state evaluation and fault positioning diagnosis. According to the invention, the operation state of the distribution network feeder can be monitored in real time and potential hidden dangers can be identified by using the existing monitoring equipment, the fault position can be rapidly positioned after the fault occurs, and rapid troubleshooting and power transmission recovery are facilitated.

An antenna is provided, including a conductive patch and a conductive feed. The patch has several sides. The conductive feed is arranged at a first side of the patch. The feed is connected to the patch along at least a part of the first side. The feed may be tapered away from the patch. One or more conductive short parts may be provided at the first side of the patch. Each short part may be configured either to connect (the first side of) the patch to ground or to connect the feed to ground. Also provided are a transceiver comprising the antenna, and a method of making the antenna.

The utility model discloses a single board detection tool used for an internet of things electric energy meter, comprising a detection bench which is provided with a four-station rotary table, the four-station rotary table is provided with a pedestal used for placing an electric energy meter to be detected, and the pedestal is provided with a positioning assembly; the feeding line, the detection assembly and the qualified product discharging line are arranged on the periphery of the four-station rotary table and used for feeding, detecting and discharging correspondingly. According to the utility model, the electric energy meter detection steps are decomposed, the time of single detection action is reduced, and the positioning assembly and the carrying module are used for replacing manual feeding and discharging actions, so that the detection efficiency is greatly improved, meanwhile, the time for waiting for discharging after detection is reduced, the working efficiency is further improved, and the large-batch detection requirement is met.

A display device includes: a substrate; a first sensor electrode and a second sensor electrode disposed on the substrate; an antenna electrically separated from the first sensor electrode to transmit and receive radio frequency signals; and an antenna feed line electrically connected to the antenna pattern.

The invention discloses a band-pass type active frequency selective surface based on double-element composite loading. The band-pass type active frequency selective surface comprises at least one resonance unit which is periodically arranged, the resonance unit sequentially comprises a top metal frequency selection surface layer, a first dielectric structure layer, a middle metal feed layer, a second dielectric structure layer and a bottom metal frequency selection surface layer from top to bottom; the top metal layer and the bottom metal layer are composed of square ring aperture grooves subjected to deformation processing, and the middle feed layer is of a cross zigzag metal structure, plays a role in coupling an electromagnetic field and serves as a bias network of the AFSS. And the metal through holes penetrate through the resonance units in the vertical direction, so that the middle layer feeder line can respectively provide reverse bias voltage for independently regulating and controlling the resonance frequency for the PINs and the variable capacitance diodes on the top layer and the bottom layer. According to the invention, the functions of band switching and wide-range frequency tuning can be met, so that the problem of insertion loss increase caused by limited design frequency regulation and control range and element loading of the AFSS in the prior art can be solved.

A transceiver device, including a multi-antenna feeder array and a reconfigurable intelligent surface (RIS), where the multi-antenna feeder array includes a plurality of active antennas configured to transmit electromagnetic radiation based on a data stream pre-coded with a pre-coder. The RIS includes a plurality of passive antennas, each passive antenna is configured to receive the electromagnetic radiation from the multi-antenna feeder array and to re-transmit the received electromagnetic radiation with a respective adjustable phase shift. The transmission from the plurality of active antennas of the multi-antenna feeder array to the plurality of passive antennas of the RIS is defined by a transmission matrix, where the multi-antenna feeder array is configured to generate the pre-coder based on one or more generalized eigenvectors of the transmission matrix.

A MIMO antenna comprises: a substrate; a first feed line and a second feed line formed on the front side of the substrate and spaced apart from each other; a first radiator receiving a feed signal from the first feed line; a second radiator spaced apart from the first radiator by a predetermined distance and receiving a feed signal from the second feed line; a first ground pattern surrounding the first feed line, electrically connected to the ground, and extending in the longitudinal direction of the substrate; a second ground pattern spaced apart from the first ground pattern by a predetermined distance, surrounding the second feed line, electrically connected to the ground, and extending in the longitudinal direction of the substrate; a first connection line connecting the first ground pattern and the second ground pattern in an area adjacent to the first longitudinal ends of the first ground pattern and the second ground pattern.