160results about How to "Improve isolation" patented technology

Electronic devices (20, 20′) of superior design flexibility that avoid channel-width quantization effects common with prior art fin-type (FIN) field effect transistors (FIN-FETS) (22) are obtained by providing multiple FIN-FETs (22) and at least one planar FET (32, 32′) on a common substrate (21), wherein the multiple FIN-FETs (22) have fins (231, 232) of at least fin heights H1 and H2, with H2<H1. The multiple FIN-FETs (22) and the at least one planar FET (32, 32′) are separated vertically as well as laterally, which aids electrical isolation therebetween. Such electrical isolation can be enhanced by forming the planar FET (32) in a semiconductor region (441) insulated from the common substrate (21). In a preferred embodiment, the multiple height fins (231, 232) are obtained by first forming all fins (231, 232′) of common height H1 and then shortening some of the fins (232) to height H2<H1 by differentially etching upper portions thereof that have, preferably, been implanted with etch rate altering ions.

Structures, devices and methods are provided for creating enhanced back barriers that improve the off-state breakdown and blocking characteristics in aluminum gallium nitride AlGaN/GaN high electron mobility transistors (HEMTs). In one aspect, selective fluorine ion implantation is employed when developing HEMTs to create the enhanced back barrier structures. By creating higher energy barriers at the back of the two-dimensional electron gas channel in the unintentionally doped GaN buffer, higher off-state breakdown voltage is advantageously provided and blocking capability is enhanced, while allowing for convenient and cost-effective post-epitaxial growth fabrication. Further non-limiting embodiments are provided that illustrate the advantages and flexibility of the disclosed structures.

The embodiment of the invention discloses a method and a device for planning physical cell identities (PCI), so as to avoid the PCI collision and reduce the interference of reference signals. The method of the embodiment of the invention comprises the following steps: acquiring the interference information among base stations; assigning different Vshift groups according to the interference information, i.e., assigning the corresponding Vshift to the cell in each base station; clustering the base stations according to the relation of physical positions of the base stations; assigning the PCI group to the base station in the non-multiplexing cluster and assigning the PCI to the cell in the base station; calculating the score of each PCI group, assigning the PCI group with the score thereof meeting the preset conditions to the base station in the multiplexing cluster, and assigning the PCI to the cell in the base station. The embodiment of the invention further provides a device for planning the PCI. The embodiment of the invention can effectively avoid the PCI collision and reduce the interference of the reference signals.

The application discloses a private network access method and system based on virtual switches and SDN technology. The method comprises the steps of: dividing a physical server into a network node and a computing node; establishing a plurality of virtual switches on the network node; establishing a private network and allocating a virtual local area network in a corresponding computing node, so as to bind a port for connecting a second-layer switch and the computing node to the virtual local area network; setting the virtual local area network for a second virtual switch; setting a network mode of a tenant as a virtual extensible local area network; and allocating a network identifier, which is related to the virtual local area network, of the virtual extensible local area network of another virtual switch, so that the computing node and the network identifier communicates corresponding to a host or a virtual machine. The method conveniently separates different physical servers rented by different tenants, reduces the dependence to a physical hardware equipment for adding a bare metal physical server into the software defined network, and is unnecessary to use a programmable switch.

The invention discloses a multi-standard antenna, comprising a reflecting plate, as well as a dual-frequency antenna group and a single-frequency antenna group, which are arranged on the reflecting plate, wherein the dual-frequency antenna group comprises two rows of dual-frequency antenna arrays arranged in parallel, each dual-frequency antenna array further comprises a high-frequency antenna unit and low-frequency antenna units, each high-frequency antenna unit is arranged at the center of part of or both of the low-frequency antenna units and between the adjacent two low-frequency antenna units, and the two rows of the dual-frequency antenna arrays have the structural symmetry; and the low-frequency antenna group is a single-frequency antenna array arranged on the symmetric axis of the two rows of the dual-frequency antenna arrays, and the single-frequency antenna array comprises a plurality of high-frequency antenna units. The multi-standard antenna can be shared by more than 5 communication standards, and the downward inclination angle under each standard can be independently and electrically controlled; and the overall antenna is compact in structure, the isolation degree under all the standards is high, and the structural reliability is high.

A system and method for providing improved isolation between sampling channels in a vector network analyzer and sampling circuit. A vector network analyzer sampling channel includes a non-linear transmission line, an isolation device, a band-pass filter, and a sampler. The nonlinear transmission line receives a continuous-wave driving signal and generates a shockwave from which a pulse signal is generated. The pulse signal is used to gate the sampler and thus sample an RF signal. The isolation device and band-pass filter provide reverse isolation for RF signals traveling in the reverse direction within the channel and prevent RF signal leakage between vector network analyzer channels. The isolation device may include an isolator, amplifier or other reverse isolation device, and is used in conjunction with a band-pass filter. The band-pass filter is used to pass a frequency band for driving the non-linear transmission line. The stop-bands of the band-pass filter are used to prevent the RF leakage signal from reaching other sampling channels.

The invention discloses a miniaturized dual-band eight-unit MIMO terminal antenna suitable for 5G. The antenna comprises a dielectric substrate, two dielectric side plates and circuits printed on thesurfaces of the three dielectric plates. Feeders of eight antenna units are printed at the upper surface of the dielectric substrate of the antenna, and a metal floor is printed at the lower surface of the dielectric substrate of the antenna; four antenna units and three sets of decoupling structures distributed among the antenna units at intervals are printed at the inner side walls of the two dielectric side plates, each antenna unit is formed by a T-type feed branch and two grounding radiation patches, each grounding radiation patch is formed by a rectangular patch and a bent short-circuitwire, each decoupling structure is a short-circuit metal patch having three bent thin seams, and the antenna units pass through the floor through the feeding points located at the end portions of thefeeders to perform feed of a coaxial inner core. Through optimization design of the antenna units and the decoupling structures, the positions of the antenna units and the decoupling structures are reasonably arranged so that the antenna has the advantages of miniaturization, double frequency bands and high isolation among the antenna units and is suitable for a 5G terminal.

The invention relates to a multi-antenna assembly which comprises at least one first antenna unit arranged on the same side of a first mounting bottom plate, first feeders electrically connected with the first antenna units, and feeder isolators arranged at the peripheries of the first feeders to avoid signal interference. In order to avoid feeder interference to inter-layer antenna units, the feeder isolators are arranged to improve the degree of antenna isolation.

An electrosurgical energy delivery apparatus includes an energy delivery circuit, a control circuit and an energy-harvesting system with a plurality of energy-harvesting circuits and a voltage regulator that provides a regulated DC voltage to the energy delivery circuit and/or the control circuit. The energy delivery circuit receives an electrosurgical energy signal having a primary frequency and selectively provides the electrosurgical energy signal to an energy delivery element. The control circuit connects to the energy delivery circuit and selectively enables the flow of electrosurgical energy to the energy delivery element. The plurality of energy-harvesting circuits each include an energy-harvesting antenna tuned to a particular frequency, a matched circuit configured to receive an RF signal from the energy-harvesting antenna, rectify the RF signal and generate a DC signal, and an energy storage device that connects to the voltage regulator to receive and store the DC signal.

The invention provides a three-dimensional metamaterial decoupling structure used for a microstrip array antenna. The structure comprises a public grounding plate, a dielectric substrate on the public grounding plate, two rectangular radiation patches symmetrically arranged on the upper surface of the dielectric substrate, and two coaxial feed ports, wherein five three-dimensional metamaterial decoupling units are embedded in the portion, between the two rectangular radiation patches, in the dielectric substrate in a row. By embedding the five three-dimensional metamaterial decoupling units in a dielectric between microstrip antenna array elements, intercoupling between the microstrip antenna array elements is effectively reduced, and accordingly the isolation of an antenna array is improved.

A method of connecting signal lines between an integrated circuit (IC) die and a carrier or external circuit, and corresponding apparatus. Techniques for adjusting magnetic coupling between terminated signal lines include splitting a return path for termination current and disposing one nearby on either side of the terminated signal line, creating two small termination current loops conducting in opposite directions; using separate terminating impedances, which may be unequal, to control current in each of the loops; and arranging major axes of the termination current loops for a signal to be perpendicular to those of the isolation-target signal. Capacitive coupling adjustments include routing ground potential termination current return connections nearby the signal connection to shield it from the isolated signal line, using dual overlapping connections to shield each return path, and adjusting dielectric material proximity to the signal paths. For isolation across a limited frequency range, increasing either inductive or capacitive mutual coupling above the achievable minimum may create an isolation null at the desired frequency that effects higher isolation than is obtainable with minimum coupling values.

The invention provides a dual-polarization broad band antenna feeder unit, which adopts a dipole which uses two striplines to feed to form a crossed structure, is fixed on an earth plate, and forms an angle of plus 45 degrees and an angle of minus 45 degrees with the axis of the earth plate serving as an angle bisector on which a separating metal sheet (27) is fixed. The conduction bands arranged on the upper ends of the two striplines bend and are arranged deviating form central points of respective dipole radiation arms and pass through crosswise up and down at the central points of respective dipole radiation arms and fixed on two radiation arms (7) and (4) which deviate far form the central points. The width of the conduction bands of the striplines, a supporting plate, and the radiation arms are respectively W3, W2 and W1. The distance between the two radiations of the dipole is W4; and the distances form the radiation arms to the central points are W5 and W6. W1, W2, W3, W4, W5, W6 as well as the height, width and position of the metal sheet (27) are all adjustable. The invention has the advantages of the frequency broad bands and an isolation of 30 Db, can compose dual-polarization array antennae, wherein HPBWH is equal to 65 degrees and HPBWH is equal to 90 degrees, for use as base station antennae of double-frequency and tri-frequency.

A reference voltage circuit having an open-loop buffer driven by a matching buffer included within a closed-loop, generates a stable differential or single-ended voltage while minimizing signal-dependent short-term and long-term drift. The open-loop buffer may be a replica of the closed-loop buffer, reducing the effect of a signal coupled on the voltage reference lines. The reference voltage circuit may be adapted for a switched capacitor ADC.

New designs of optical devices, particularly for adding or dropping a selected wavelength or a group of wavelengths as well as multiplexing a plurality of signals into a multiplexed signal or demultiplexing a multiplexed signal into several signals are disclosed. According to one aspect of the present invention, an isolator core is built into the optical devices to stop a reflected signal from an optical file in the optical devices. As a result, the optical devices are amenable to small footprint, broad operating wavelength range, enhanced impact performance, lower cost, and easier manufacturing process.

A high-frequency module has a structure including balanced terminals, with high design flexibility and good transmission characteristics. Wiring patterns to be connected to balanced terminals of SAW filters of SAW duplexers are located on a second layer to a sixth layer of a layered body. The characteristic impedances of first wiring patterns defining a pair of parallel or substantially parallel lines match, the characteristic impedances of second wiring patterns defining a pair of parallel or substantially parallel lines match, the characteristic impedances of third wiring patterns defining a pair of parallel or substantially parallel lines match, and the characteristic impedances of fourth wiring patterns defining a pair of parallel or substantially parallel lines match.

The invention discloses a multiplexer structure based on a dielectrically integrated suspension line. The multiplexer is an N-multiplexer, wherein N is a positive integer greater than or equal to 2, the N-multiplexer comprises first to Nth band-pass filters, and each band-pass filter comprises a low-pass filter and a high-pass filter that are connected to each other; and when the multiplexer is aduplexer, one end of the second low-pass filter is the input end of the duplexer, the other end of the second low-pass filter is connected with the second high-pass filter and the first low-pass filter through a T-type junction, the other end of the second high-pass filter is a second output end, the other end of the first low-pass filter is connected with the first high-pass filter, and the otherend of the first high-pass filter is a first output end. According to the scheme, the problem of ensuring a high isolation degree between channels when the multiplexer receives and transmits signalsat the same time can be solved, and the mutual interference of the channels can be avoided.

The present invention discloses a radio-frequency signal perception device based on a photoelectric oscillator. The device comprises a laser source, a polarization controller, a Mach-Zehnder modulator, an electromagnetic field sensor, an optical fiber coupler, an adjustable radio frequency band-pass filter, a radio-frequency amplifier, an optical filter, an intermediate-frequency band-pass filterand two photoelectric detectors; the laser source, the polarization controller, the Mach-Zehnder modulator, the electromagnetic field sensor and the photoelectric detectors are connected through optical fibers; radio frequency input ports of the photoelectric detectors, the optical fiber coupler, the adjustable radio frequency band-pass filter, the radio-frequency amplifier and the Mach-Zehnder modulator are connected in order; and one output of the optical fiber coupler, the optical fiber, the photoelectric detectors and the intermediate-frequency band-pass filter are connected in order. Theradio-frequency signal perception device achieves intermediate-frequency receiving of the high-frequency broadband electromagnetic field, reduce the cost of receiving the high-frequency device, does not need an external local oscillator, and is simple in electromagnetic sensor structure and good in radio-frequency signals to be received and the isolation of the local oscillator.

The invention discloses an electromagnetic wave absorbing body-based high-isolation array antenna, which comprises a metal bottom plate, wherein four element antennas are vertically arranged on the metal bottom plate, are symmetrically distributed relative to the center of the metal bottom plate and rotate 90 degrees in sequence; an electromagnetic wave absorbing body unit formed by electromagnetic wave absorbing walls is arranged on two vertical axes of the metal bottom plate; each electromagnetic wave absorbing wall is of a double-sided structure and comprises two layers of electromagnetic wave absorbing plates which are laminated back to back; a plurality of evenly spaced microstrip structures are arranged at the front side of each electromagnetic wave absorbing plate; and each microstrip structure comprises a cross-shaped microstrip patch and square annular microstrip lines arranged at the outer side of the cross-shaped microstrip patch. The antenna is applied to a Beidou satellitenavigation system; and spatial electromagnetic waves, close to a factory, of the element antennas are absorbed through the electromagnetic wave absorbing body unit, so that coupling of the spatial waves between the element antennas is reduced and the isolation between the element antennas is improved.

A set of stackable plant starter cell trays in which each of the plant trays include a plurality of inwardly tapering starter cell sockets for removable insertion of plant starter cells. Each of the plant trays has upper and lower leg connection means for the removable insertion of support legs, and each of the support legs is adapted for removable insertion into one of the leg connection means.

The invention provides a radio frequency identification reader-writer and a radio frequency identification method with ultrahigh frequency. The read-writer comprises a control module, an emission module, a directional coupling module, a radio frequency matching module, an antenna module, a vector modulation carrier wave cancellation module, a receiving module, an interface module and a power supply module; on one hand, carrier signal power leaked to a receiving link from the emission module is reduced through matching and increasing the isolation degree of a coupling module, on the other hand, the carrier signal power leaked to the receiving link is reduced through a vector modulation carrier wave cancellation technology. In the radio frequency identification reader-writer and the radio frequency identification method with ultrahigh frequency, the impedance characteristic of a coupler is changed by use of a radio frequency matching technology, the isolation degree is increased, the carrier signal power leaked to the receiving link from the emission module is reduced; the carrier signal power leaked to the receiving link is reduced through the vector modulation carrier wave cancellation technology; and through combination of the two technologies, the carrier signal power leaked to the receiving link is eliminated or reduced to sufficiently small, a tag returning signal is retained, thus the sensitivity of the reader-writer is improved and the read-write distance is increased.

The invention discloses a ferrite-based MIMO (multiple input multiple output) terminal antenna comprising a rectangular dielectric slab, an earthing metal plate, the cuboid-shaped ferrite, a main antenna and a diversity antenna. The earthing metal plate is attached to one surface of the dielectric slab. The cuboid-shaped ferrite is attached to the other surface of the dielectric slab. The main antenna is attached to the ferrite. The diversity antenna is attached to the dielectric slab. The diversity antenna and the main antenna are arranged at opposite angle points of the dielectric slab. According to the arrangement, the ferrite is introduced and surrounded by the main antenna, due to high permeability and permittivity of the ferrite within 0.5GHz-3 GHz, size of the main antenna is narrowed greatly, expanded bandwidth is covered, and the miniaturization and multi-frequency problem of the conventional terminal antenna is solved; the diversity antenna is arranged at the opposite corner of the dielectric slab, high isolation of the MIMO antenna system is achieved with high application value.

The invention relates to a 4*4 ultra-wideband MIMO antenna, which belongs to the technical field of wireless communication. The 4*4 ultra-wideband MIMO antenna consists of four monopole ultra-wideband antenna units, two rectangular reticular cross-shaped isolation structures and a dielectric plate. The four monopole ultra-wideband antenna units have a same structure and are situated on the four corners of the dielectric plate. Two antennas on one diagonal line turn180 degrees, and antennas on one horizontal line turn 90 degrees. The integral body is centrosymmetric relative to the dielectric plate. The two rectangular reticular cross-shaped isolation structures are situated on the centers of the front and back sides of the dielectric plate and are vertically symmetric relative to the dielectric plate. The novel reticular isolation structures introduced in the MIMO antenna allow the antenna to obtain excellent isolation performance. The 4*4 ultra-wideband MIMO antenna has the advantages of wide bandwidth, high isolation degree, simple structure and easy manufacture and integration, and is suitable for various mini mobile terminals.

The invention relates to a method for improving the transceiver isolation degree of a vehicle-borne millimeter wave radar antenna. According to the method, the isolation degree of transceiver antennasis effectively improved by controlling the radiation levels of receiving and transmitting antenna array patterns in airspaces near plus or minus 90 degrees. By adopting multiple columns of receivingand transmitting antennas, the widths of antenna radiating patches in the direction of a transmitting and receiving array are simultaneously controlled, and the coupling on a spatial radiation path ofthe transmitting and receiving antennas is effectively controlled. When a single-column form is employed by receiving and transmitting, the isolation degree of the transceiver antennas is about 35dBunder the same spacing condition, the widths of the transmitting antenna patches in the direction of the array is adjusted, and so that the isolation degree of the transceiver antennas is increased toabout 55dB.

The invention discloses a novel environment-friendly release agent of metal templates and methods for preparing and using the same, and relates to technical field of release agents. The novel environment-friendly release agent of metal templates comprises, in parts by weight, 30-80 parts of waste engine oil, 1-20 parts of an emulsified complex additive, 0.1-10 parts of a thickening agent, 0.1-10 parts of an oiliness agent, 0.1-1 part of a fungicide, 0.1-0.5 part of a defoamer, 0.1-1.0 parts of a corrosion inhibitor for aluminum, and 10-60 parts of tap water. The release agent improves the release effect.

The invention relates to the laser field and discloses a large-aperture polarization independent high-power isolator. The large-aperture polarization independent high-power isolator comprises a first birefringent prism, a 45-degree faraday rotator, a second birefringent prism and a beam combiner, all of which are orderly arranged in the forward transmission direction of a light path, wherein the first birefringent prism and the second birefringent prism both are reflective polarizing beam splitting prisms; a half-wave plate is optically cemented on a light transmission surface at the magneto-optical crystal side of the faraday rotator. The birefringent prisms of the reflective polarizing beam splitting prisms are employed to divide light transmitted in the isolator into two beams of polarized light, the polarization directions of the two beams of polarized light are perpendicular to each other and a large separation angle is formed between the two beams of polarized light, and a pair of total-reflection optical elements is employed to further reflect two sub-beams of the returned light so that the two sub-beams are deviated away from the forward transmitted light, and therefore, the large-aperture polarization independent high-power isolator is realized; the half-wave plate is added on the side of the magneto-optical crystal so that the isolation of the isolator is enhanced, and as a result, the high-power isolator is enabled to be more stable and reliable and can be prevented from being burnt out.

A shallow trench isolation is formed in a semiconductor substrate adjacent a MOS transistor. The shallow trench is filled with a fill material while other processing steps are performed. The fill material is later removed through a thin well etched into layers above the trench, leaving the trench hollow. A thin strain inducing layer is then formed on the sidewall of the hollow trench. The well is then plugged, leaving the trench substantially hollow except for the thin strain inducing layer on the sidewall of the trench. The strain inducing layer is configured to induce compressive or tensile strain on a channel region of the MOS transistor and thereby to enhance conduction properties of the transistor.

The invention is an rotary steerable tool. The improved rotary steerable tool comprises a control tube that slides vertical within a mandrel in response to changes in drilling fluid pressure, thereby opening and closing a channel between the mandrel and a piston chamber in a rotationally isolated sleeve. With the channel open, a piston in the piston chamber is exposed to the drilling fluid. When the drilling pressure is sufficient to cause the piston to move, the piston forces a deflection pad outward. After the deflection pad engages a borehole wall, any additional increases in pressure force the opposing side of sleeve toward the opposite wall, thereby tilting the direction of any attached drill bit. An optional guide lug and alignment sleeve orient the deflection pad with respect to other components.

The invention provides an optical separator, consisting of an inlet optical fibre head, a separation body, two self-focus lenses and an outlet optical fibre head which are sequentially arranged; the separation body consists of a displacement-typed crystal, 45DEG Faraday rotary plate, a half-wave plate and a displacement-typed crystal which are sequentially arranged and fixedly connected with each other; the separated surfaces of the two displacement-typed crystals are parallel to each other, with the same separation quantity and reverse separation directions. The facing surfaces of the inlet optical fibre head and the first self-focus lens are parallel to each other and the facing surfaces of the outlet optical fibre head and the second self-focus lens are parallel to each other; the optical axes of the two self-focus lenses are parallel to each other, with the same focal length and coincident adjacent focal surfaces; the internal end surface of the inlet optical fibre head and the internal end surface of the outlet optical fibre head are arranged at an object/image conjugation position. The optical separator solves the technical problems of large volume and high cost in the background technique, and has the advantages of good separation effect and eliminating the polarization mode dispersion.

The invention relates to a multi-target measurement and control ground station system. The system comprises a phased-array antenna subsystem, a receiving and demodulation subsystem and a data processing and monitoring subsystem; the phased-array antenna subsystem comprises an antenna feed module, a digital acquisition module and a digital beam forming module; the antenna feed module comprises a planar array antenna and a blind compensation linear array antenna; the digital acquisition module is used for carrying out power division, filtering, amplification, down-conversion and AD acquisition digitization on multiple paths of radio frequency signals; the digital beam forming module is used for receiving the multiple paths of digital target signals and performing digital beam forming, and each target correspondingly forms one digital beam signal; the receiving and demodulating subsystem comprises a plurality of receiving and demodulating modules and is used for receiving and demodulatingthe plurality of digital beam signals; and the data processing and monitoring subsystem is used for carrying out unified network time service and real-time monitoring on other equipment in the system. The measurement and control requirements of a plurality of large-airspace aircrafts and long-distance aerospace flight targets are met, the problems of cross-modulation and intermodulation interference and ENOB compression under the condition that a plurality of targets are located at different distances are solved, the time service precision is improved, and the system integration is improved.

The present document discloses an antenna unit and a terminal. The antenna unit disclosed by the present document includes an antenna circuit board, at least two neighboring antennas and an electromagnetic coupling module used for isolating coupling signal transmission between two neighboring antennas, wherein the electromagnetic coupling module is connected in series between the two neighboring antennas. The present document uses the electromagnetic coupling module to isolate signal transmission between the two neighboring antennas, i.e., electric signals in the two antennas are unable to be transmitted to opposite end, thereby reducing signal coupling between the neighboring antennas and improving the isolation between the two neighboring antennas.