103results about How to "Changing the dielectric constant" patented technology

The invention relates to a memory, based on organic material and applied in combination with an organic integrated circuit (integrated plastic circuit). The invention particularly relates to a memory for a RFID-Tag (RFID-tags: radio frequency identification tags) and several methods for describing a memory.

The invention discloses a multi-walled carbon nanotube-loaded nano ferrofferic oxide (Fe3O4) catalyst and a preparation method and an application thereof. In the multi-walled carbon nanotube-loaded nano ferrofferic oxide catalyst, ferroferric oxide is distributed on the surface of the outer wall of the multi-walled carbon nanotube. The preparation process is simple, the cost is low, and easiness in industrialized popularization is realized. In the synthesized catalyst, the crystallinity of the Fe3O4 nano particles is high, the particle size is controllable, and the particles distribution is narrow. The catalytic activity of the multi-walled carbon nanotube-loaded nano ferrofferic oxide (Fe3O4) catalyst multi-walled carbon nanotube-loaded nano ferrofferic oxide (Fe3O4) catalyst (Fe3O4-MWCNTs) is high and the Fe3O4-MWCNTs is easy for being repeatedly used through magnetic separation. The Fe3O4-MWCNTs which is prepared by the method can be used as peroxide mimic enzyme and can be used as catalyst for organic pollutants which are difficult to degrade and for organic synthesis.

The invention discloses an ultra-wideband planar phased array antenna and a beam scanning method thereof, and relates to the technical field of antennas. The ultra-wideband planar phased array antennacomprises a dielectric substrate, and a liquid crystal phase shifter network which is externally applied with a bias voltage and arranged on the dielectric substrate, wherein the liquid crystal phaseshifter network is composed of a plurality of liquid crystal phase shifter units. An antenna unit array which covers a plurality of frequency bands is arranged above the liquid crystal phase shifternetwork; and the antenna unit array is composed of a plurality of antenna units, wherein the antenna unit is a Vivaldi antenna with a slot line, and a liquid crystal phase shifter is powered through amicrostrip line-slot line structure. Compared with the prior art, the problems that the ultra-wideband phase-controlled profile is high in profile degree, large in antenna loss and low in utilizationrate are solved.

The invention relates to a filter of tunable terahertz metamaterial and a preparation method thereof based on low-voltage-driven liquid crystal material with the aim of solving problems of an existing filter of tunable terahertz metamaterial such as fixed working wavelength, limited working bandwidth, narrow application scope, complicated structure and preparation technology and low reliability. The filter is in the structure of a multi-layer flat plate and comprises a glass substrate layer, a first metal structure layer, an insulation layer, a metal seed layer, a second metal structure layer, liquid crystal material and a glass cover plate. The preparation method comprises following steps: first, preparation of metal structure layers; second, preparation of the insulation layer; third, preparation of the metal seed layer; fourth, preparation of a mould structure used for electroplating; fifth, preparation of a periodic slit-metal structure; sixth, filling of liquid crystal material and covering with the glass cover plate. The filter of tunable terahertz metamaterial and the preparation method thereof based on low-voltage-driven liquid crystal material have following beneficial effects: the filter is low in needed voltage, simple in structure, wide in tuning range, high in response speed and good in chemical stability and is not sensitive to polarization; and the method is suitable for preparation of filter of tunable terahertz metamaterial filter of tunable terahertz metamaterial.

The invention provides a preparation method of a europium oxide (EUO) type molecular sieve. The preparation process comprises the steps: adding one or more of ethanol, propylene glycol, methyl alcohol and acetone with a proper amount to be taken as an organic solvent; filling a high-pressure inert gas into a high-pressure kettle, and carrying out sectional type crystallization under a certain condition; filtering and washing the product to be neutral; and drying, roasting to obtain the EUO molecular sieve. The organic solvent is added, so that a template agent precursor is promoted to be dissolved in an aqueous phase, and the generation of a template agent is accelerated; and therefore, the crystallization speed of the molecular sieve is accelerated, and the crystallization time of the molecular sieve is remarkably shortened.

The invention discloses a method to extract chromocor from duck bran, which comprises the following steeps: a, sorting duck kernel; removing impurity; grinding; sieving; separating out bran; b, controlling water in bran between 10% and 16%; entering into squeezing and swelling device; treating; getting puffy porous granular material; c, defatting the bran material; d, extracting several times with alcohol dissolvent; separating; merging filter liquor; e, condensing the filter liquor; cooling; aging; proceeding chromocor evolution; separating; washing; drying; getting the extract.

The present invention relates to a radome which has excellent transmission loss of radio waves and structural strength, which can be easily produced, and which has favorable workability, and a method of producing the same. The radome includes an olefin woven material and a glass cloth, in which the olefin woven material and the glass cloth are impregnated with a matrix resin to be integrated with each other, and the glass cloth is disposed closer to an inner side of the radome than the olefin woven material. As the olefin woven material, a woven material formed of an ultrahigh molecular weight polyethylene fiber can be used. As the matrix resin, an epoxy resin, a vinyl ester resin, an unsaturated polyester resin, or a silicone resin can be used.

The invention discloses a full-flexible capacitive three-dimensional force touch sensor based on a spherical curved surface electrode. The full-flexible capacitive three-dimensional force touch sensorcomprises an inverted-mushroom-shaped contact, a semicircular convex groove, a flexible spherical curved surface common electrode, flexible rectangular excitation electrodes and a flexible substrate.The whole flexible substrate is in an uncovered cylindrical shape and serves as a bottom support; the inverted-mushroom-shaped contact serves as a top cover, the flexible substrate and the inverted-mushroom-shaped contact are connected through the semicircular convex groove, and an air cavity is formed in the flexible substrate. The flexible spherical curved surface common electrode and four flexible rectangular excitation electrodes are bonded in the air cavity; the flexible spherical curved surface common electrode is embedded in the lower surface of the inverted mushroom-shaped contact andis arranged in the center of the four flexible rectangular excitation electrodes; the four flexible rectangular excitation electrodes are uniformly arranged on the flexible substrate at intervals; and the flexible spherical curved surface common electrode and the flexible rectangular excitation electrode form four capacitors which are distributed in a spatial three-dimensional manner. The full-flexible capacitive three-dimensional force touch sensor has higher detection sensitivity and higher response speed, and can be used as the flexible electronic skin to be applied to the research fieldsof human-computer interaction, intelligent robots, medical rehabilitation and the like.

The invention discloses a Terahertz wave filter, which can be used for absorbing waves in specific frequency bands in Terahertz incident waves to realize filtering. The Terahertz wave filter is characterized by comprising a sub-wavelength metal grating layer of which the grating period is shorter than the incident wave length, a substrate layer which is carried below the sub-wavelength metal grating layer, and a temperature control device which is connected with the substrate layer and is used for controlling the temperature of the substrate layer, wherein the sub-wavelength metal grating layer comprises a metal grid bar and a medium grid bar. The Terahertz incident waves of specific frequencies undergo localized surface plasma resonance on the sub-wavelength metal grating layer, and Terahertz incident waves in frequency bands close to the resonant frequency are absorbed. When the temperature of the substrate layer is changed by the temperature control device, the resonant frequency is changed, and the frequency band of the absorbed waves is changed. By adopting the Terahertz wave filter, tunable filtering is realized.

The invention discloses a liquid crystal phase shifter, a phase shift method and a making method of the liquid crystal phase shifter. The phase shifter comprises a first substrate, a second substrate,a first electrode layer arranged on the side, facing the second substrate, of the first substrate, a second electrode layer and multiple isolation belts arranged between the first electrode layer andthe second substrate; the first substrate and the second substrate are subjected to paired box arrangement, the second electrode layer is arranged on the side, facing the first substrate, of the second substrate and comprises multiple electrically isolated electrode plates, the multiple isolation belts, the first electrode layer, the second electrode layer and a liquid crystal layer between the first electrode layer and the second electrode layer form multiple mutually independent sealing areas, each electrode plate corresponds to one sealing area, and liquid crystals with dielectric constants which are not exactly the same are sealed in the sealing areas. The degree of phase shift of the liquid crystal phase shifter is increased.

The invention discloses a semiconductor device and a manufacturing method thereof. The manufacturing method of the semiconductor device comprises the following steps of: forming a first medium layer, a first barrier layer and a first hard mask layer in sequence on the surface of a semiconductor substrate; etching the first hard mask layer, the first barrier layer and the first medium layer to form a first groove; forming first metal layers in the first groove and on the surface of the first hard mask layer; and performing a first chemical-mechanical grinding process, removing the first hard mask layer and a part of the first metal layers, and keeping a part of or all of the first barrel layer to form a first metal interconnection line. The first barrier layer is formed, so that the dielectric coefficient of the first medium layer can be prevented from varying, and the reliability of the semiconductor device is enhanced.

The present invention relates to a system and a method for simultaneously performing circulation utilization on sewage, sludge and domestic garbage. The system is characterized by comprising an oxidant supply system, a membrane enrichment system, a garbage pretreatment system, a material input system, a reactor and an energy recovery system, wherein the oxidant supply system provides a high temperature and high pressure oxidant to the reactor, the membrane enrichment system is used for performing concentration separation on sewage to obtain concentrated water and produced water, the material input system provides a high temperature and high pressure pulping material to the reactor, the critical gas of the reactor provides the heating source of the heating oxidant and the pulping material for the oxidant supply system and the material input system, and a water vapor outlet and the produced water outlet of the membrane enrichment system are connected to electrolysis equipment. According to the present invention, the system simultaneously contains the supercritical water reactor and the membrane enrichment system so as to simultaneously treat high concentration sewage, sludge and domestic waste, wherein the high concentration sewage is concentrated by using the membrane enrichment system, and the concentrated sewage, the grinded sludge and the domestic garbage are mixed and matched to form the pulping material having sufficient fluidity.

The invention discloses a high-sensitivity capacitive flexible three-dimensional force tactile sensor based on a bionic mushroom structure. The high-sensitivity capacitive flexible three-dimensional force tactile sensor includes a hemispherical contact used as a top cover and a flexible substrate used as a bottom support, the hemispherical contact and the flexible substrate are connected through an annular fixing piece, and flexible hemispherical common electrodes and four flexible spherical curved surface excitation electrodes are arranged inside the hemispherical contact and the flexible substrate at intervals to form four capacitors which are spatially and stereoscopically distributed, and the whole capacitor is of a mushroom-shaped structure. The sensor provided by the invention has higher detection sensitivity and faster response speed, and can be applied to the research fields of electronic skin, flexible wearable electronic devices, soft robots, intelligent prostheses, man-machine interaction and the like.

The invention discloses a reflective dual-layer liquid crystal phase shifting unit based on a patterned graphene electrode. The reflective dual-layer liquid crystal phase shifting unit comprises an upper medium substrate layer, a middle medium substrate layer and a lower medium substrate layer, a first liquid crystal layer is injected into a gap formed between the upper medium substrate layer andthe middle medium substrate layer, the lower surface of the upper medium substrate layer is provided with a plurality of metal patches which are sequentially connected in series through a connecting line, and a metal microstrip structure is formed; the upper surface of the lower medium substrate layer is fully covered with a metal layer, and a metal grounded electrode is formed; and a second liquid crystal layer is injected into a gap formed between the middle medium substrate layer and the metal grounded layer, and a graphene patch layer which has the same structure as the metal microstrip structure and has the different thickness is arranged on the upper surface of the middle medium substrate layer to serve as a graphene electrode. According to the phase shifting unit, electricity tuningof dielectric constants of two layers of liquid crystal materials can be achieved, and therefore the working bandwidth of the phase shifting unit is increased; and meanwhile, by changing the bias voltage of the graphene electrode, the chemical potential energy of graphene can be changed, and then the working bandwidth of the phase shifting unit is further increased.

The invention discloses a preparation method of a three-dimensional framework polymer-based high-dielectric composite material based on a core-shell structure, and relates to the technical field of high-dielectric composite materials. The preparation method comprises the following steps: pretreatment of foamed nickel, preparation of foamed nickel / barium titanate, and preparation of the polymer-based high-dielectric composite material, wherein the polymer-based high-dielectric composite material is divided into three kinds, namely, foamed nickel / barium titanate / epoxy resin, a nickel oxide / barium titanate / epoxy resin composite material and a nickel oxide (nickel) / barium titanate / epoxy resin composite material. According to the prepared polymer-based high-dielectric composite material, a dielectric constant up to 8000 can be obtained under the condition that the loss is lower than 0.1, the dielectric constant and the loss can be conveniently changed by adjusting the electrophoretic deposition amount, the sintering temperature and the oxidation temperature, and the preparation method of the polymer-based high-dielectric composite material has the advantages of being simple, easy to operate, high in applicability and practicability and the like.

The present invention relates to a rainwater sensor. It is formed from two groups of metal foil strips attached to an insulant baseplate surface and insulating water-proofing layer attached to the surface of said two groups of metal foil strips. Said two groups of metal foil strips are formed into two electrodes of capacitor. Said invention also provides the application of the above-mentioned rainwater sensor in preparation of automatic wiper controller. Besides, said invention also provides its working principle.

The invention discloses a green aldehyde-free biological adhesive and a preparation method thereof. The green aldehyde-free biological adhesive is prepared from the following raw materials in parts byweight: 10-15 parts of defatted soybean protein powder, 5-8 parts of sodium hydroxide solution, 25-35 parts of polyvinyl alcohol, 8-12 parts of hexamethylenetetramine, 1-3 parts of modified nanometersilicon dioxide, 80-85 parts of ethanol, 15-20 parts of preservative, 0.5-1 part of denaturant, and 0.05-0.1 part of surfactant. The adhesive has the beneficial effects that the adhesive has excellent water resistance.

The invention relates to a toxic and harmful gas detection sensor and method, and belongs to the technical field of gas detection. The toxic and harmful gas detection sensor comprises a shell, a dielectric substrate, a sensitive dielectric film, an artificial plasmon resonator and a metal microstrip transmission band; the top of the shell is open-mouthed; the dielectric substrate is horizontally arranged and located in the shell, and the lower surface of the dielectric substrate is fixedly connected with the inner wall of the bottom end of the shell; the sensitive dielectric film is fixedly connected to the upper surface of the dielectric substrate; the artificial plasmon resonator is fixedly connected to the sensitive dielectric film; and one end of the metal microstrip transmission bandis fixedly and electrically connected with the artificial plasmon resonator, the other end of the metal microstrip transmission band penetrates the shell, and the metal microstrip transmission band isfixedly connected to the sensitive dielectric film. The gas detection sensor is small in size, low in power consumption, high in external interference resistance, easy to integrate and high in detection sensitivity.

A parasitic radiation electrode (3) and a driven radiation electrode (4) are formed at an interval on the surface of a dielectric base (2). A material (8) for permittivity adjustment is provided in an interval (S) between the parasitic radiation electrode (3) and the driven radiation electrode (4) where capacitance is created. The material (8) for permittivity adjustment has a lower permittivity than the dielectric base (2), so that the permittivity between the parasitic radiation electrode (3) and the driven radiation electrode (4) is below the permittivity of the dielectric base (2), reducing the capacitive coupling between the parasitic radiation electrode (3) and the driven radiation electrode (4). As a result, the resonance interaction between the parasitic radiation electrode (3) and the driven radiation electrode (4) decreases, thus improving antenna performance, without taking measures, such as an increase in the interval (S) between the parasitic radiation electrode (3) and the driven radiation electrode (4) and a decrease in permittivity of the dielectric bases (2), which may obstruct the miniaturization of a surface-mount antenna (1).

The invention discloses a thermally tuned frequency selective surface based on a BST film and a processing technology. The frequency selective surface comprises a base layer, an intermediate dielectric layer and a frequency selective surface metal layer which are sequentially in close contact from bottom to top, wherein the frequency selective surface metal layer includes electrodes arranged at two sides and a plurality of FSS (Frequency Selective Surface) structural units arranged between the two electrodes, a micron-scale electric heating unit is further connected between the two electrodes,and the plurality of FSS structural units are arranged in the electric heating unit at equal intervals to form a periodic array. The invention has the significant effects that the temperature of theBST film is controlled through introducing a micron-scale electric heating wire according to the mechanism of thermal tuning, and the dielectric constant of the BST film is indirectly controlled through changing the current size, so that the transmission frequency of the BST film is enabled to be changed, and the dielectric tunabilty of the terahertz frequency band is realized.

The invention discloses a touch screen, a touch screen manufacturing method and a display device. Positioning sensitivity of touch points of the touch screen can be improved. The touch screen comprises a substrate, a plurality of first electrode assemblies, a plurality of second electrode assemblies and an insulating sealed cavity, the first electrode assemblies are positioned on the substrate and distributed along a first direction and comprise first electrodes and second electrodes arranged on different layers, the second electrode assemblies are positioned on the substrate and distributed along a second direction intersected with the first direction and comprise third electrodes and fourth electrodes, a hollow stereoscopic area is enclosed by the first electrodes, the second electrodes, the third electrodes and the fourth electrodes at the intersections of the first electrode assemblies and the second electrode assemblies, and the cavity is positioned in the hollow stereoscopic area and contain magnetic materials.

The invention discloses a double-absorption-peak adjustable metamaterial wave-absorbing body based on liquid crystals. Each wave-absorbing unit comprises both upper and lower layer medium substrates;liquid crystal layers are injected into gaps between the upper and lower layer medium substrates; a metal resonant unit is arranged on the lower surface of each upper layer medium substrate; each metal resonant unit comprises a plurality of short dipole metal patches which are sequentially connected in series and a plurality of long dipole metal patches which are sequentially connected in series;the plurality of short dipole metal patches which are sequentially connected in series are conected with a first metal electrode by metal wires; and the plurality of long dipole metal patches which are sequentially connected in series are connected with a second metal electrode by metal wires. The double-absorption-peak adjustable metamaterial wave-absorbing body has double absorption frequencies;by powering up different electrodes, the variation of either of absorption peak frequencies can be limited within a small range, and large-range regulation is implemented for the other absorption peak frequency; and according to the double-absorption-peak adjustable metamaterial wave-absorbing body disclosed by the invention, under a perpendicular incident wave, when any one resonant point is regulated, absorptivity of over 93% can still be kept.

The invention discloses a microstrip antenna with the phase shifting function. The microstrip antenna comprises a substrate, a metal ground plane, a signal transmission line and a radiation patch, wherein the metal ground plane is located on the upper surface of the substrate. The microstrip antenna further comprises a ferroelectric dielectric layer, the metal ground plane is located on the lower surface of the ferroelectric dielectric layer, the signal transmission line is attached to the upper surface of the ferroelectric dielectric layer, and a direct-current bias voltage and a high-frequency electromagnet wave signal are superimposed and are added between the signal transmission line and the metal ground plane. The microstrip antenna has the advantages of being simple in structure, small in high-frequency loss, low in noise, low in cost and the like.

The invention discloses a porous dielectric material, a preparation method thereof and a capacitive pressure sensor, and the preparation method comprises the following steps: mixing a liquid metal with a liquid prepolymer of a polymer according to a preset proportion to form a mixed solution; adding a curing agent of the polymer into the mixed solution to form a liquid mixture of the liquid metaland the polymer; fully mixing the liquid mixture with a soluble filling material, and carrying out curing treatment to form a cured structure; and dissolving the soluble filling material by using a specific solvent to finally form the solid porous dielectric material with a variable dielectric constant. The capacitive pressure sensor comprises two electrode plates and a flexible dielectric layer located between the two electrode plates, and the flexible dielectric layer is made of the porous dielectric material. The porous dielectric material has a variable dielectric constant and good flexibility; and the capacitive pressure sensor has relatively high sensitivity.

The embodiment of the invention provides electronic equipment, a charging method and a charging device. The electronic equipment comprises a charging interface, a capacitance detection sensor and a processor, wherein the charging interface comprises a metal shell; the metal shell is connected with the capacitance detection sensor, and the capacitance detection sensor is used for detecting the capacitance value of the metal shell; the processor is connected with the capacitance detection sensor and the charging interface, and the processor is used for obtaining the corresponding temperature according to the capacitance value of the metal shell and adjusting the charging power of the charging interface according to the temperature. According to the embodiment of the invention, the temperature of the charging interface can be obtained through the capacitance detection sensor, so as to adjust the charging power of the charging interface when the metal shell is overheated, thereby preventing the charging interface from being burnt due to overheating.

The invention relates to a hydrogen concentration sensor based on a microstrip antenna and a system thereof, in particular to the field of hydrogen sensing. The sensitive adsorption layer of the hydrogen concentration sensor is made of a hydrogen sensitive material. The hydrogen sensitive material is relatively sensitive to hydrogen, and absorbing surrounding hydrogen, the dielectric constant andthe volume are changed. When the hydrogen concentration around the hydrogen concentration sensor is relatively high, the hydrogen sensitive adsorption layer absorbs hydrogen in the surrounding air, the distance and the dielectric constant between the radiation patch and the grounding plate are changed. The microstrip antenna is composed of the radiation patch, the sensitive adsorption layer, the insulating layer and the grounding plate. The resonant frequency of the microstrip antenna is related to the distance between the radiation patch and the grounding plate and the dielectric constant. Bymeasuring the change condition of the resonant frequency of the microstrip antenna and according to the corresponding relation between the change condition of the resonant frequency of the microstripantenna and the hydrogen concentration, the hydrogen concentration to be measured is obtained.