51results about How to "No dielectric loss" patented technology

The invention discloses an air dielectric cylindrical lens antenna. The air dielectric cylindrical lens antenna comprises a metal disc-shaped parallel plate waveguide, a feed source antenna and arc-shaped metal support plates, wherein the metal disc-shaped parallel plate waveguide comprises an upper metal disc and a lower metal disc, the upper and the lower inner surfaces of the metal disc-shaped parallel plate waveguide are planes or arc-shaped surfaces, a central cavity of the metal disc-shaped parallel plate waveguide forms an air dielectric cylindrical lens, an annular boss is arranged below the edge of the upper disc of the metal disc-shaped parallel plate waveguide, the annular boss is arranged above the edge of the lower disc of the metal disc-shaped parallel plate waveguide, the feed source antenna is arranged between the two annular bosses, the feed source antenna is embedded in an arc-shaped groove between the arc-shaped metal support plates on the edges of the two metal discs, and the arc-shaped metal support plates are connected with the two metal discs through screws. The feed source antenna is a horizontal polarization gradient groove antenna or a horizontal polarization gradient groove antenna array.

The invention discloses a high-isolation small-sized radial power distributor / synthesizer. The high-isolation small-sized radial power distributor / synthesizer comprises a radial power distributor / synthesizer of an inserted resistor diaphragm and a rectangular waveguide-circular waveguide mode conversion structure, wherein the radial power distributor / synthesizer of the inserted resistor diaphragm comprises an input circular waveguide port, an impedance transformation structure and more than one output rectangular waveguide; the three structures are connected in sequence; the rectangular waveguide-circular waveguide mode conversion structure comprises an input rectangular waveguide, a one-into-four power distribution network, a waveguide expansion transition structure and an output circular waveguide which are connected sequentially. The power distributor / synthesizer can realize power multiplexing, wide band, low loss, small size, easy assembly and power distribution / synchronization of port isolation.

The invention provides a halogen-free low-dielectric-loss epoxy resin composition, which comprises the following components in parts by weight: 5-20 parts of a SMA resin, 150-200 parts of an epoxy resin, 60-90 parts of a curing agent A, 40-70 parts of a curing agent B, 70-100 parts of packing, 0-13 parts of a flame retardant, 0.3-1 part of a curing accelerator, 0.7-1 part of a coupling agent, and 70-100 parts of a solvent, wherein the curing agent A is one or more of diamino sulfobenzide, diamino diphenylmethane, diamino diphenyl ether, amino paraxylene, dicyandiamide, phenolic novolac resin, bisphenol-A phenolic resin, and phosphorus-containing phenolic resin; and the curing agent B is an active ester curing agent. The invention also provides a prepreg and a laminated board prepared by using the composition. The epoxy resin composition and prepreg and laminated board disclosed by the invention can achieve a halogen-free flame retardant effect, and have low dielectric constants and dielectric losses.

A solar air conditioner consists of tubular energy collectors, an energy-storing part, an automatic light-electric inter-compensator, an exchanger, one-way valves, solenoid three-way valves, a condenser, a distiller, a pressure-reducing throttle valve, an enhancer, pressure-regulating valves, a relay console, a blower, and conveying and conducting pipes. Its outdoor unit consists of the tubular energy collectors and energy storing part with the exchanger and the automatic light-electric inter-compensator inside. The exchanger is connected with the condenser and then enhancer via one-way valves and solenoid three-way valves and pressure-regulating valves. The distiller with the relay console and blower is connected with the condenser and enhancer at both ends of the distiller respectively. The said inter-compensator is connected with relay console via electric wires. The conveying and conducting pipes make connection of all parts. It has a simple structure, saves energy, runs in a closed loop at low cost stably and durably, without media loss and noise, and is easy to be used widely.

The invention provides an ultra-wide band multi-path coaxial power distribution synthesis structure based on a high-odor oval function curve. A coaxial gradual change structure based on the high-odor oval function curve is adopted, an input signal enters a high-odor oval function curve coaxial gradual change structure from an input end coaxial connector, and is distributed onto a circular disc in a uniform-amplitude and same-phase way, multi-path coaxial probes in uniform distribution are led out from the edge of the circular disc to be coupled onto a plurality of independent amplifier assemblies corresponding to the multi-path coaxial probes for respectively carrying out power amplification, each coaxial probe adopts a step cylinder structure with the wider upper part and the narrower lower part, the amplified multi-path signal is synthesized and output through a structure completely identical to a power splitter structure. The ultra-wide band multi-path coaxial power distribution synthesis structure has the advantages that the difficult problem of high-power synthesis of the ultra-wide frequency band is solved, the high-odor oval function curve coaxial gradual change structure is adopted, in addition, the step coupling probe conversion is carried out, the signal energy high-efficiency distribution and synthesis of the ultra-wide frequency band are realized, the structure is compact and symmetrical, the heat radiation performance is good, the high-degree modular design is adopted, the processing and the assembly are simple, and the reliability is high.

A multi-purpose solar energy air conditioner is disclosed. The left and right pressure tanks containing liquid ammonia and installed on heat absorbing plate have upper ports communicated with inlet of condenser whose outlet is communicated with inlet of heat exchanger via pressure reducing valve. The outlet of heat exchanger is communicated to the lower ports of said pressure tanks. The case of heat exchanger is connected via three-way valve to lower port of evaporator. The another way of said three-way valve is linked to water return inlet of solar heat collector. The hot water outlet of said collector is communicated with heat accumulator communicated with vapour tank. Its advantages include simple structure, low cost, long service life and high efficiency.

A mobile terminal antenna employing a metal frame as a radiation body comprises the metal frame, a system floor, a first metal connection strip, a second metal connection strip, a lumped inductor anda coaxial feeding port, wherein the system floor is rectangular, a left side and a right side are long sides, an upper side and a lower side are short sides, the system floor is encircled by the metalframe, a gap exists between the metal frame and the system floor, the metal frame is connected with the first metal connection strip, the second metal connection strip and the system floor, the lumped inductor is welded onto the second metal connection strip, an outer conductor of the coaxial feeding port is welded onto the system floor, and an inner conductor crosses the gap and is welded onto the metal frame. The antenna is of a pure metal structure, no dielectric loss is generated, and high radiation efficiency is achieved; the metal frame is used as the radiation body, a traditional antenna structure is not needed, and the internal space of the mobile terminal is almost not occupied; and the mobile terminal antenna is applicable to various small-size mobile terminals with representative of a mobile phone.

The invention relates to a compound crystal variation modification method of ramie fiber. The compound crystal variation modification method comprises following steps: the ramie fiber is delivered into a sealed container; a modification medium is added; the pressure of the sealed container is increased to be as large as a modification pressure, and then is decreased instantaneously; the ramie fiber is subjected to vacuumization, high speed centrifugation spinning drafting and microwave radiation; and the modification medium is removed so as to obtain the compound crystal variation modified ramie fiber.

The invention discloses a halogen-free flame-retardant low-pressure packaging material with ultra-low dielectric property and a preparation method thereof. The halogen-free flame-retardant low-pressure packaging material is prepared from dimer acid, dibasic acid, diamine, polyether diamine, difunctional polyphenylene ether, diisocyanate, a halogen-free flame retardant, an antioxidant, a hydrolysisstabilizer, a UV stabilizer, a colorant, phosphoric acid, and dibutytin laurate. The invention also discloses a preparation method of the halogen-free flame-retardant low-pressure packaging materialwith ultra-low dielectric property. The packaging material disclosed by the invention has ultra-low dielectric loss and halogen-free flame retardant performance, and is suitable for electronic components which are manufactured with low-pressure injection molding process and can be applied to the field of high-frequency communication, and especially suitable for the field of fast and efficient packaging of sensitive high-frequency electronic components.

The invention relates to a composite method for modifying a flax fabric via crystal lattice change. The method comprises the following steps: putting the flax fabric into an enclosed container; filling a modification medium; boosting to a modification pressure; releasing pressure momentarily; performing combined treatment of vacuum pumping, high-speed centrifugal rotary traction and microwave radiation, and removing the modification medium to obtain the flax fabric modified via crystal lattice change. The flax fabric modified via crystal lattice change has the advantages of increased pores, lower degree of crystallization and yarn softness, and the size stability, softness, dyeing performance and the like of a product are enhanced; a method for releasing pressure momentarily is adopted, so that the bulkiness and softness of the fabric are enhanced greatly; combined treatment of vacuum pumping, high-speed centrifugal rotary traction and microwave radiation is adopted, so that the quality of the fabric is further enhanced, and the modification efficiency is increased greatly.

The invention relates to a connecting structure for LED light strip efficacy high-efficiency conversion hollow glass curtain walls. An aluminum alloy casing pipe is fixedly sheathed on an aluminum alloy column, and a bolt nut clamping slot is formed in the middle part of the front end face of the aluminum alloy casing pipe, aluminum alloy subframe clamping slots are respectively formed in both sides of the front end face, and a controller mounting slot is formed in the rear end of the aluminum alloy casing pipe; a rabbet is provided with an aluminum alloy pressing plate; an aluminum alloy subframe consists of front end slot frames, a support plate and rear end slot frames; each front end slot frame is an LED light strip efficacy high-efficiency conversion hollow glass curtain wall bonding frame, and an aluminum alloy pressing piece is inserted into the rear end slot frames, and is connected with the aluminum alloy casing pipe through the front end slot frames, a bolt hole in the support plate and the rear end slot frames, and a bolt nut is located in the bolt nut clamping slot in the front end face of the aluminum alloy casing pipe; clamping strips are respectively inserted into the clamping slots in both sides of the front end face of the aluminum alloy casing pipe; faces of the clamping strips are in contact with the faces of the rear end slot frames of the aluminum alloy subframe; two pieces of LED light strip efficacy high-efficiency conversion hollow glass are bonded onto the support plate and the rear end slot frames of the aluminum alloy subframe in a butt joint manner through powerful bonding mats and structural silicone sealant.

The invention discloses a broadband frequency selection surface for planar dual-polarization millimeter waves, belongs to the technical field of antenna engineering, and relates to a dual-polarizationfrequency selection surface. The frequency selection surface is formed by splicing and combining frequency selection surface unit arrays. The frequency selection surface unit is of a metal square annular structure. Each side of the annular structure is provided with two strip-shaped dipoles which extend inwards: a first dipole and a second dipole, wherein the height of the first dipole is largerthan that of the second dipole, the included angles between the dipoles and the corresponding annular structure edges are the same and are not 90 degrees, and the opening directions of acute angles formed by the dipoles and the corresponding annular structure edges are consistent. A traditional annular unit is not suitable for an integrated connection structure and needs to be supported by a medium. A traditional dipole-shaped unit is small in passband width and high in in-band loss. By adopting the deformed square annular unit, the bandwidth similar to that of a traditional annular unit and the lower in-band loss are obtained, and the method can be achieved through metal machining.

A solar air conditioner consists of tubular energy collectors, an energy-storing part, an automatic light-electric inter-compensator, an exchanger, one-way valves, solenoid three-way valves, a condenser, a distiller, a pressure-reducing throttle valve, an enhancer, pressure-regulating valves, a relay console, a blower, and conveying and conducting pipes. Its outdoor unit consists of the tubular energy collectors and energy storing part with the exchanger and the automatic light-electric inter-compensator inside. The exchanger is connected with the condenser and then enhancer via one-way valves and solenoid three-way valves and pressure-regulating valves. The distiller with the relay console and blower is connected with the condenser and enhancer at both ends of the distiller respectively. The said inter-compensator is connected with relay console via electric wires. The conveying and conducting pipes make connection of all parts. It has a simple structure, saves energy, runs in a closed loop at low cost stably and durably, without media loss and noise, and is easy to be used widely.

The invention discloses a full metal circular polarization and liner polarization 8-shaped wave beam antenna of a millimeter wave. Two antenna radiation units are respectively mounted on two rectangular feed waveguides which are connected or not connected with each other; the two rectangular feed waveguides are connected with a double-T-shaped waveguide splitter; each antenna radiation unit is provided with a cross-shaped coupling gap; a pair of isosceles triangle radiation slots which are distributed in a central symmetry way are formed in the two diagonal line directions and positioned on the upper surface of a rectangular radiation cavity; the rectangular radiation cavity is fixed above the cross-shaped coupling gap; the arm E and the arm H of the double-T-shaped waveguide splitter are input ends; the two side arms are respectively connected with two hollow conducting cavities. According to the antenna disclosed by the invention, the 8-shaped wave beam shape and width are realized by adjusting an angle; full metal can be used for extremely harsh environments, such as low-temperature and high-temperature environments; meanwhile, the full metal circular polarization and liner polarization 8-shaped wave beam antenna of the millimeter wave has the advantages of compact structure, low side lobe and back lobe, wide application range, low requirement for machining precision, easiness in implementation, low cost and the like, and is very suitable for millimeter-wave band.

The invention discloses a broadband high-gain metal lens antenna based on four-ridge waveguide. The antenna comprises a lens formed by a plurality of lens units and a feed source horn positioned on a focal plane of the lens, and each lens unit consists of a square waveguide and four ridges positioned in the centers of four walls of the square waveguide. The problem that a traditional lens antenna is difficult to realize wide gain bandwidth and high aperture efficiency at the same time is solved; the antenna disclosed by the invention is high in gain and wide in working gain bandwidth, and can meet the requirement of millimeter wave long-distance communication; and according to the antenna, far-field high-gain radiation is achieved, meanwhile, dual-polarization scanning is achieved in two dimensions, and the antenna is suitable for the application scene of millimeter wave multi-beam scanning.

This invention discloses a photocatalytic ozone tube. The photocatalytic ozone tube comprises: an end cover, an ultraviolet lamp tube fixed on the end cover, a tubular network electrode, a quartz tube and a stainless steel tube. The ultraviolet lamp tube is set in the tubular network electrode to form a photocatalytic region between the ultraviolet lamp tube and the tubular network electrode. The tubular network electrode is in the stainless steel tube, and the quartz tube is between the tubular network electrode and the stainless steel tube to form an ozone generation tube. The oxidation rate and efficiency of ozone are increased by photocatalysis, thus ozone is decomposed into OH free radicals. Neutral, acidic and basic organic matters that cannot be degraded by ozone alone can be oxidized with an oxidation rate 10-10 to the power 4 times that of ozone or ultraviolet. In this photocatalytic ozone tube, organic matters can be completely degraded into CO2 and water.

The invention relates to a composite crystal change modification method of cotton fiber. According to the method, the cotton fiber is placed in a closed container, a modification medium is added, pressure is raised to modification pressure, then, the pressure is released instantly, the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is used for removing the modified medium, and therefore composite crystal change and modified cotton fiber can be obtained. According to the crystal change and modified cotton fiber, pores are increased, degree of crystallinity is reduced, the fiber is soft, and size stability, flexibility, dyeing performance and the like of products are improved; the method of pressure instant release is adopted, and the fluffiness and flexibility of the fiber are improved greatly; the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is adopted, therefore, fiber quality is further improved, and modification efficiency is greatly improved.

The invention relates to a compound crystal transition modification method of flax yarn. The flax yarn is arranged in a sealed container, a modification medium is injected in the container, the pressure is increased to the modification pressure, then the pressure is released instantly, vacuumizing, high speed centrifugation rotation traction and microwaves act jointly, the modification medium is removed, and the compound crystal transition modified flax yarn is obtained. The crystal transition modified flax yarn is larger in hole, lower in crystallinity and is soft, and improves the size stability, softness, dyeing property and the like of products. Through the method of releasing the pressure instantly, the fluffiness and softness of the yarn are largely improved. Through the joint action of vacuumizing, high speed centrifugation rotation traction and microwave radiation, the quality of the yarn is further improved, and the modification efficiency is largely improved.

The invention relates to a composite crystal change modification method of cotton / ramie blended fabrics. According to the method, the cotton / ramie blended fabrics are placed in a closed container, a modified medium is added into the container, pressure is raised to modification pressure, then, the pressure is released instantly, then the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is used for removing the modified medium, and therefore composite crystal change and modified cotton / ramie blended fabrics can be obtained. According to the crystal change and modified fabrics, pores are increased, degree of crystallinity is reduced, the fabrics are soft, and size stability, flexibility, dyeing performance and the like of products are improved; the method of pressure instant release is adopted, and therefore the fluffiness and flexibility of the fabrics are improved greatly; the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is adopted, quality of the fabrics is further improved, and modification efficiency is greatly improved.

The invention discloses a radial multi-beam gap waveguide slot antenna array applied to a microwave band. The radial multi-beam gap waveguide slot antenna array comprises three parts of a gap waveguide radial feeding network, a slot antenna array and a coaxial-gap waveguide conversion structure. By a design of a bottom-layer feeding network and each slot sub-array in a top layer in a radial direction, generation of random numbers of radial wave beams can be achieved, the size and the direction of each wave beam are independently adjustable, and a beam split phenomenon is proposed according toa certain radial asymmetric construction mode of the antenna.

The invention relates to a novel planar double inversed-L antenna comprising two patches, one feeder line, one grounding plate and one short-circuit pin. The two patches are juxtaposed on the same plane to form the upper half part of the novel planar double inversed-L antenna, wherein one patch is connected with the grounding plate through the short-circuit pin, and the other patch is connected with the grounding plate through the feeder line. The short-circuit pin and the feeder line are respectively arranged on the apexes of the two patches. The novel planar double inversed-L antenna adoptsthe coaxial feeding form, has simple structure, small size and large gain, is easy to integrate and regulate, causes no dielectric loss and can be widely applied to the wireless communication field.

The invention relates to a composite crystal change modification method of a cotton fabric. According to the method, the cotton fabric is placed in a closed container, a modification medium is added, pressure is raised to modification pressure, then, the pressure is released instantly, the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is used for removing the modified medium, and therefore a composite crystal change and modified cotton fabric can be obtained. According to the crystal change and modified cotton fabric, pores are increased, degree of crystallinity is reduced, the fabric is soft, and size stability, flexibility, dyeing performance and the like of products are improved; the method of pressure instant release is adopted, and the fluffiness and flexibility of the fabric are improved greatly; the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is adopted, therefore, fabric quality is further improved, and modification efficiency is greatly improved.

The invention relates to an LED (light emitting diode) high-efficient conversion hollow glass curtain wall and a manufacturing method. The LED high-efficient conversion hollow glass curtain wall forms an LED hollow glass display layer by overlapping a glass or toughened glass layer and an LED lattice glass mold layer, wherein one surface of the LED lattice glass mold layer is embedded with a layer of conductive metal lattice network formed by an LED positive pole and negative pole, or one surface of the LED lattice glass mold layer is provided with a conductive metal lattice network formed by conductive films; an LED chip is positioned on a crossed point of the conductive metal lattice network; the back glass or back toughened glass is adhered at the back of the LED lattice glass mold layer through a hollow aluminum strip, and the area of the back glass or back toughened glass is less than that of the LED lattice glass mold layer, so that periphery parts of the LED lattice glass mold layer are exposed; and an aluminum alloy subframe is formed by a front slot, a hollow cavity and a rear slot.

The invention provides an ultra-wide band multi-path coaxial power distribution synthesis structure based on a high-odor oval function curve. A coaxial gradual change structure based on the high-odor oval function curve is adopted, an input signal enters a high-odor oval function curve coaxial gradual change structure from an input end coaxial connector, and is distributed onto a circular disc in a uniform-amplitude and same-phase way, multi-path coaxial probes in uniform distribution are led out from the edge of the circular disc to be coupled onto a plurality of independent amplifier assemblies corresponding to the multi-path coaxial probes for respectively carrying out power amplification, each coaxial probe adopts a step cylinder structure with the wider upper part and the narrower lower part, the amplified multi-path signal is synthesized and output through a structure completely identical to a power splitter structure. The ultra-wide band multi-path coaxial power distribution synthesis structure has the advantages that the difficult problem of high-power synthesis of the ultra-wide frequency band is solved, the high-odor oval function curve coaxial gradual change structure is adopted, in addition, the step coupling probe conversion is carried out, the signal energy high-efficiency distribution and synthesis of the ultra-wide frequency band are realized, the structure is compact and symmetrical, the heat radiation performance is good, the high-degree modular design is adopted, the processing and the assembly are simple, and the reliability is high.

The invention relates to a compound crystal variation modification method of ramie fiber. The compound crystal variation modification method comprises following steps: the ramie fiber is delivered into a sealed container; a modification medium is added; the pressure of the sealed container is increased to be as large as a modification pressure, and then is decreased instantaneously; the ramie fiber is subjected to vacuumization, high speed centrifugation spinning drafting and microwave radiation; and the modification medium is removed so as to obtain the compound crystal variation modified ramie fiber.

The invention relates to a composite crystal change modification method of cotton yarn. According to the method, the cotton yarn is placed in a closed container, a modification medium is added into the container, pressure is raised to modification pressure, then, the pressure is released instantly, the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is used for removing the modified medium, and therefore composite crystal change and modified cotton yarn can be obtained. According to the crystal change and modified cotton yarn, pores are increased, degree of crystallinity is reduced, the yarn is soft, and therefore size stability, flexibility, dyeing performance and the like of products are improved; the method of pressure instant release is adopted, and the fluffiness and flexibility of the yarn are improved greatly; the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is adopted, therefore, yarn quality is further improved, and modification efficiency is greatly improved.

The invention provides a chip packaging method and packaging structure, and the method comprises the steps: arranging a cavity on a glass substrate according to the size of a chip; embedding a chip into the cavity, and grinding and etching the chip and / or the glass substrate, so that the front surface and the back surface of the chip are respectively flush with the two surfaces of the glass substrate; curing the front surface of the chip and the surface of the glass substrate flush with the front surface of the chip, and wiring on the surface; and coating the back surface of the chip and the surface of the glass substrate which is flush with the back surface of the chip with metal coatings. According to the chip packaging method and the chip packaging structure provided by the invention, signal loss can be reduced, the packaging volume can be reduced, and good heat dissipation performance can be provided.

The invention provides a high-isolation radial power synthesis amplifier with broadband air micro-strips, which comprises a high-isolation radial power divider / synthesizer with broadband air micro-strips and at least one power amplifier module. The high-isolation radial power divider / synthesizer with the broadband air micro-strips comprises an input waveguide, a coaxial transition structure, a radial waveguide, the radial air micro-strips and at least one output waveguide, wherein the coaxial transition structure is arranged between the input waveguide and the radial waveguide, the center of the radial waveguide is connected with the input waveguide through the coaxial probe transition structure, the air micro-strips in radial distribution are connected to the periphery of the radial waveguide, a film resistor disc is pasted between each two adjacent air micro-strips, and each air micro-strip is connected with one output waveguide. The high-isolation radial power synthesis amplifier with the broadband air micro-strips can realize high-efficiency broadband power synthesis with one-division multiplexing and in single-mode operation.

A high-isolation miniaturized radial power splitter / combiner, including a radial power splitter / combiner inserted into a resistive diaphragm and a rectangular waveguide-circular waveguide mode conversion structure; the radial power of the inserted resistive diaphragm The distribution / synthesizer includes an input circular waveguide port, an impedance transformation structure, and more than one output rectangular waveguide, and the above three structures are connected in sequence; the rectangular waveguide-circular waveguide mode conversion structure includes sequentially connected input rectangular waveguides, one-to-four-way power Distribution network, waveguide expansion transition structure, output circular waveguide. The power distributing / combining device of the present invention can realize power distributing / combining with primary power division and multiplexing, broadband, low loss, miniaturization, easy assembly, and port isolation.

The invention discloses a planar dual-polarized millimeter-wave broadband frequency selective surface, belongs to the technical field of antenna engineering, and relates to a dual-polarized frequency selective surface. The frequency selective surface is formed by splicing and combining frequency selective surface unit arrays. The frequency selective surface unit is a metal square ring structure, and each side of the ring structure is provided with two strip-shaped dipoles protruding inward: The first dipole and the second dipole, the height of the first dipole is greater than the second dipole, and the included angle between each dipole and its corresponding ring structure side is the same and not 90°, each dipole The direction of the acute angle opening between the sub and its corresponding ring structure side is consistent. The traditional ring unit is not suitable for the integrated connection structure and requires dielectric support; the traditional dipole-shaped unit has a small passband bandwidth and high in-band loss. By adopting the deformed square ring unit, the invention obtains the bandwidth similar to the traditional ring unit and lower in-band loss, and can be realized through metal processing.