173results about How to "Improving Impedance Matching Performance" patented technology

A novel package includes a substrate including an upper surface ground plane connected to a lower surface ground plane by vias through the substrate, a die located on the upper ground plane and including a die pad, a transmission path including, on the upper surface of the substrate, a bonding pad connected to a first transmission line itself connected to a transition pad, and on the lower surface of the substrate, a second transmission line connected to the transition pad by a via through the substrate. A wire bond extends from the bonding pad to the die pad. A portion of the upper surface ground plane and the lower surface ground plane are connected by vias defining opposing walls on either side of the transmission path for signal isolation. A low pass filter for compensating wire bond inductance includes: a first capacitance formed between the bonding pad and at least the lower surface ground plane, the wire bond inductance, and a second capacitance formed between the die pad and at least the upper surface ground plane.

A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is curved in alternating sections. The wireless communication device is coupled to the wave antenna to provide wireless communication. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its curved structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breakage that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

An antenna module is provided. The antenna module includes a radiator, a feed pin, a ground element, a first parasitic arm, a second parasitic arm and an impedance matching unit. The radiator includes a first section and a second section, wherein an end of the first section is connected to the second section, and the first section is perpendicular to the second section. The feed pin is connected to another end of the first section. The first parasitic arm is parallel to the second section, wherein an end of first parasitic arm is connected to the ground element, and the first parasitic arm couples with the second section of the radiator. The impedance matching unit is connected to the second section and the ground element. The second parasitic arm is partially parallel to the first section, and the second parasitic arm couples with the first section of the radiator, and an end of the second parasitic arm is connected to the ground element.

The invention relates to a fire-retardant type wide-frequency-band high-power compound wave-absorbing material and a preparing method thereof. The material comprises an outer shell, an inner core and a base, wherein the outer shell is a polyhedron formed by a set of pyramids arranged side by side, the wedges of the pyramids are towards the same side, the inner core is located inside the outer shell, the base is located at the bottom of the outer shell, the outer shell is made of non-woven cloths, the inner core and the base are made of polyurethane foams, the inner surface and the outer surface of the outer shell are respectively provided with a first fire-retardant wave-absorbing agent layer in a coating mode, and the inner core and the base are immersed in second fire-retardant wave-absorbing agents. Both the first fire-retardant wave-absorbing agents and the second fire-retardant wave-absorbing agents comprise acetylene black, alpha-SiC, aluminum hydroxide, kaolin, pentaerythritol, and App-3. The corresponding preparing method comprises the steps of preparing the outer shell, preparing the inner core and the base, and inserting the inner core into the outer shell, and therefore the wave-absorbing material is obtained. The wave-absorbing material has good wave absorbing performance and fire retardance, and the preparing method is simple and easy to implement.

The invention provides a radio frequency coaxial electric coupler with a quick-locking device. The quick-locking device comprises a plug quick-locking device and a socket quick-locking device. The back of an elastic jack catch (16) of the plug quick-licking device is fixed on the plug outer conductor (11). The front portion of the elastic jack catch (16) extends with a snap joint (161). A cone face of the snap joint (1611) is arranged on the front lateral surface of the snap joint (161). The cone face of the snap joint (1611) of the elastic jack catch (16) enables the snap joint (161) to contract inward along the radial direction under the effect of the external force. The periphery of the elastic jack catch (16) is provided with a columnar-shaped unlocking sleeve (15). The plug quick-locking device refers to that a block groove (222) is formed on the front end of an outer conductor (22) of the plug along the axial direction. A catching groove (223) is formed radially outward on the wall of the block groove (222). The quick-locking device of the electric coupler has the advantages of being simple in structure, quick in product assembling, and saving the production cost of the quick-locking device.

The invention discloses a multi-spectral broadband anticorrosion stealth coating material. The coating sequentially comprises a camouflage painting coating layer, a graphene anticorrosion coating layer and a radar wave absorbing coating layer from the outside to the inside. The camouflage painting coating layer is a matt polyaspartate polyurea system containing a high-performance pigment, and hasvisible and near-infrared camouflage functions; the graphene anticorrosion coating layer is an epoxy zinc-rich/aluminum-rich system containing graphene, and has anticorrosion and infrared stealth functions; and the radar wave absorbing coating layer is an epoxy resin system containing a wave absorbing material, and has a broadband wave absorbing function. Materials of the camouflage painting coating layer, the graphene anticorrosion coating layer and the radar wave absorbing coating layer are respectively prepared by adding corresponding resins, assistants and pigment fillers at certain proportions according to a certain sequence proportion, and performing high-speed dispersion and grinding. The compatibility among the coating layers is good, and the multi-spectral broadband anticorrosionstealth coating material can be applied to camouflage stealth and corrosion protection in the fields of military vehicles, military devices, power stations, emitting devices and the like.

The invention discloses a ferrite-based ceramic composite material as well as a preparation method and application thereof. The composite material is composed of ferrite, a carbon nanotube and a ceramic material, wherein the ferrite and the ceramic material are cladded on the tube wall of the carbon nanotube, and the ceramic material is one or several kinds of aluminum oxide, aluminum nitride, and silicon nitride. The three phases of materials, namely, the ferrite, the carbon nanotube and the ceramic, are compounded to make the advantages and disadvantages of all phases of materials complementary, so that the electrical conductance of the composite material is increased, the impedance matching performance of the composite material is improved, the wave absorption performance of the composite material is made adjustable, the structure and function integration of the ferrite-based ceramic material is realized, and thus, the application range of the composite material in the high-tech field is expanded. In addition, the powder of the composite material is prepared by adopting a coprecipitation hydrothermal method and is further prepared into a block material by adopting a microwave sintering method, and the ferrite-based ceramic composite material has the advantages that all phases are dispersed uniformly, the densification degree of the sintered material is high, the production cost is low, and the large-scale industrialization is easy to realize.

A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna may be in the form of a polygonal, elliptical curve and/or coil shape. The wireless communication device is coupled to the wave antenna to provide wireless communication. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its curved structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breakage that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

The invention discloses a centimeter wave-millimeter wave compatible absorbing composite material. The material has a five-layer structure including a substrate which is an irregular surface made of a random material, a topmost first layer which is composed of a W-shaped hexagonal ferrite absorbent and a acrylic resin adhesive, a second layer which is composed of a carbonyl iron powder absorbent and an epoxy resin adhesive, a third layer which is composed of an Fe85Si1Al6Cr8 nanocrystalline sheet-like absorbent and an epoxy resin adhesive, a fourth layer which is composed of a polycrystallineiron fiber absorbent and an epoxy resin adhesive, and a fifth layer which is composed of a short carbon fiber/carbon black mixed absorbent and a polyurethane adhesive. The material can well solve theproblem of poor centimeter wave-millimeter wave compatible absorbing performance in the prior art, and is a composite wave-absorbing material compatible with electromagnetic waves of centimeter wave-millimeter wave bands.

The invention provides a double-layer allotype surface cement-based absorption material and a preparation method thereof, which relate to the cross technology field of electromagnetism and material science. Cement is adopted as a matrix, polystyrene foam and pulverized fuel ash are adopted as admixtures, an appropriate microwave absorption agent is compounded, and the obtained double-layer allotype surface cement-based absorption material is low in cost, energy saving and environmentally-friendly; a traditional panel material is subjected to surface shape designs such as a double-layer shape, a triangular shape, a sinusoidal shape, a semicircular shape and a right-angle groove shape, so that a series of double-layer allotype surface cement-based absorption material with a favorable electromagnetic absorption performance is prepared, the density and the thickness are small, the effective absorption bandwidth smaller than -10dB within the range of 1.7 to 18GHz is 13GHz or more, and the minimum reflectance is less than -30dB.

The invention relates to a ferroferric oxide/molybdenum disulfide/carbon fiber composite wave-absorbing material and a two-step reaction preparation method thereof. The preparation method comprises the following steps: firstly, carrying out surface treatment on chopped carbon fibers, mixing the chopped carbon fibers with sodium molybdate and thioacetamide, and carrying out hydrothermal reaction soas to grow a layer of self-assembled molybdenum disulfide nano-sheet on the surfaces of the carbon fibers; and secondly, carrying out hydrothermal reaction so as to modify the surface of a molybdenumdisulfide/carbon fiber composite wave-absorbing material with certain ferroferric oxide magnetic nano-particles, so that the impedance matching of the composite material is further improved, and themicrowave absorption performance of the material is further improved by virtue of high magnetic loss of the magnetic nano-particles. The composite wave-absorbing material is an ideal wave-absorbing material simultaneously having small density, high temperature resistance, high resistance loss (carbon fibers) and dielectric loss (3D nano-molybdenum disulfide) and magnetic loss (ferroferric oxide magnetic nano-particles) and excellent impedance matching performance and oxidation resistance and further has huge practical and application values in the production of composite wave-absorbing materials.

The invention provides an ultra-wideband high-gain antenna based on a radial disk impedance converter. According to the ultra-wideband high-gain antenna, the radial disk technology is introduced into the ultra-wideband antenna design for the first time, the design of the radial disk impedance converter is added to a feeding position of the antenna, the ultra-wideband operation problem of different transmission line converters in a feeding system can be solved, and the effect that an antenna radiator can achieve effective conversion and directed radiation of electromagnetic energy under the condition of wideband feeding can be guaranteed. Meanwhile, a ridge waveguide structure with electric field and magnetic field centralizing effects is adopted, and two side surfaces of a ridge waveguide cavity used for energy exchange adopt a triangular ridge structure with an ultra-wideband property, thereby guaranteeing the effect that electromagnetic waves of different frequencies have well matched electromagnetic energy conversion cavities. The ultra-wideband high-gain antenna based on the radial disk impedance converter adopts the large-diameter gradually changing and ridge directional horn radiator design technologies, can achieve high gain and directed radiation of the antenna within ultra-wideband, and can control polarization characteristic and directional diagram sidelobes of the antenna.

First touch patterns of a touch display device are disposed on a first substrate, and have bridge units and first electrode portions. The first electrode portions are disposed spaced from each other. The bridge units are connected with adjacent two of the first electrode portions. A second substrate is disposed opposite to the first substrate. A liquid crystal layer is disposed between the first substrate and the second substrate. One of the bridge units has two first portions, a second portion and two third portions. The first portions are located on the first electrode portions, and directly contact with the first electrode portions. The third portions are located on two of the first portions, and the second portion is located between two of the third portions. The first portion has a first width, and the second portion has a second width smaller than the first width.

An optical module is provided. The optical module includes a circuit board, wherein the circuit board includes a surface layer, a reference layer, and an intermediate layer positioned between the surface layer and the reference layer. The surface of the surface layer is provided with a first row of golden fingers and a second row of golden fingers, and the first row of golden fingers is closer tothe edge of the circuit board than the second row of golden fingers. At a projection area for by projecting that second row of goldfinger onto the intermediate layer, the intermediate layer is hollowed out to form a hollowed-out area. The hollowed-out area can be formed so that the second row of goldfingers does not flow back through the intermediate layer, but through a reference layer formed therewith, which is conducive to improving the impedance matching effect of the high-speed signal. The hollowed-out area can be formed so that the second row of goldfingers does not flow back through theintermediate layer but through a reference layer formed therewith.

The invention relates to the technical field of wireless communication, and provides a liquid-state metal-based antenna and a preparation method therefor, and an antenna radiation symmetrical vibrator. The antenna comprises a control unit, an antenna feeder line, a supporting sleeve, an air pressure balance cavity, a base and two flexible side plates which are prepared from a piezoelectric material with an inverse piezoelectric effect; a ventilating opening is formed in the top of the air pressure balance cavity, and the bottom is connected with the top of the supporting sleeve; openings are formed in the left and right sides of the base respectively, and the two flexible side plates cover the corresponding openings to form a hollow cavity with the base in a jointly surrounding manner; thebottom of the supporting sleeve is connected with the hollow cavity, and the hollow cavity is filled with liquid-state metal; one end of the antenna feeder line is inserted in the bottom of the basewhile the other end is electrically connected with a transceiver; and the control unit is electrically connected with the flexible side plates and used for applying voltages of corresponding values tothe flexible side plates according to a to-be-received frequency signal. The liquid-state metal-based antenna is small in size, convenient to carry, high in radiation gain, electromagnetically compatible, large in frequency band width, and high in impedance matching.