124results about How to "Improve Radiation Performance" patented technology

The invention discloses a broadband scattering beam reconfigurable low RCS planar array antenna. The antenna array structurally comprises a metal radiation oscillator structure, a dielectric substrate, an offset line structure, a rectangular metal floor, a pin header, a slotted metal aluminum plate and a feed structure from top to bottom, the pin header penetrates through the dielectric substrate; the metal radiation array structure realizes phase regulation of the antenna unit on reflected electromagnetic waves and regulates the beam direction of scattered electromagnetic waves; the antenna array is composed of N * N antenna units, and N is greater than or equal to 2 and is a positive integer. According to the invention, broadband scattering phase reconstruction is realized, and the wide radiation characteristic of the antenna is realized by using the tight coupling design.

The invention discloses a circularly polarized dielectric resonator two-dimensional beam scanning phased-array antenna based on liquid crystal, and belongs to the technical field of microwave antennas. The antenna comprises an elliptic cylindrical dielectric resonator radiation structure, a sequential rotation feed network and a liquid crystal phase shifter structure based on a glass plate, wherein the elliptic cylindrical dielectric resonator radiation structure and the sequential rotation feed network are arranged on a flexible printed circuit board (FPC); the radiation structure and the feed network which are arranged on the FPC comprise a radiation unit, an FPC layer and a feed network; the liquid crystal phase shifter comprises a glass dielectric substrate, a liquid crystal layer, an inverted spiral microstrip line and a bias network; the elliptic cylindrical dielectric resonator radiation structure realizes wide impedance bandwidth and wide axial ratio bandwidth; the antenna array also uses a sequential rotation method, the axial ratio characteristic of the phased-array antenna is further improved, and the coupling feed structure is simplified by using the design that the L-shaped microstrip line is connected with the inverted spiral microstrip line after sequential rotation.

The invention relates to a millimeter wave broadband circularly polarized filtering antenna, which belongs to the technical field of wireless energy transmission and comprises an upper dielectric substrate, a lower dielectric substrate, an upper metal floor, a middle metal floor, a lower metal floor, a top patch array, cavity columns and short circuit via holes. The bottom metal floor is arranged on the lower surface of the lower dielectric substrate; the middle-layer metal floor is arranged on the upper surface of the lower-layer dielectric substrate; the upper-layer metal floor is arranged on the lower surface of the upper-layer dielectric substrate; the top-layer patch array is arranged on the upper surface of the upper-layer dielectric substrate; the cavity column penetrates through the middle-layer metal floor, the lower-layer dielectric substrate and the bottom-layer metal floor to define an I-shaped SIW cavity; a feed hole is formed in the I-shaped SIW cavity; the short-circuit via hole penetrates through the top-layer patch array, the upper-layer dielectric substrate and the upper-layer metal floor; and two same rectangular coupling grooves are respectively etched in the middle parts of the upper-layer metal floor and the middle-layer metal floor.

The invention discloses a multi-spectral-band compatible stealth coating based on a high-entropy alloy and a preparation method of the multi-spectral-band compatible stealth coating, and belongs to the technical field of functional high-entropy alloy coatings and preparation of the functional high-entropy alloy coatings. The problem that the visible light and infrared stealth effect of an existing stealth coating in a wide spectrum range is poor is solved. According to the preparation method, the high-entropy alloy film is prepared through the magnetron sputtering technology, efficient customization of material components and structures is achieved through scientific screening and optimal combination of elements and regulation and control of magnetron sputtering parameters, and therefore the high-entropy alloy film which is uniform, compact and excellent in performance is obtained. Test results show that the visible light band absorptivity of the high-entropy alloy coating is about 0.95, the infrared band emissivity of the high-entropy alloy coating is about 0.05, and multi-spectrum-band compatible stealth in the visible light and infrared spectrum range is achieved.

The embodiment of the invention provides electronic equipment. The electronic equipment comprises a grounding plate, an annular metal piece and a feed source, the annular metal piece and the grounding plate are arranged at an interval along the thickness direction of the electronic equipment, and the annular metal piece is closer to the back side of the electronic equipment relative to the grounding plate; wherein the annular metal piece comprises a feeding point and at least two grounding points, the at least two grounding points are used for being connected with the grounding plate to be grounded, and the at least two grounding points comprise a first target grounding point and a second target grounding point which are located on the two sides of the feeding point and are closest to the feeding point. The annular metal piece comprises a radiation part which is located between the first target grounding point and the second target grounding point and comprises the feeding point. And the feed source is electrically connected with the feed point to excite the radiation part to support receiving and transmitting of an electromagnetic wave signal of a preset frequency band. The invention also provides an antenna assembly. According to the invention, the communication performance in the head-hand state can be effectively improved.

The invention discloses a self-packaging filtering slot antenna based on a folded substrate integrated waveguide cavity. The self-packaging filtering slot antenna comprises a first metal layer, a first dielectric substrate, a second metal layer, a second dielectric substrate, a third metal layer, a third dielectric substrate, a fourth metal layer, a fourth dielectric substrate and a fifth metal layer, the first metal layer is arranged on the upper surface of the first dielectric substrate; the second metal layer is arranged on the upper surface of the second dielectric substrate; the third metal layer is arranged on the upper surface of the third dielectric substrate; and the fourth metal layer and the fifth metal layer are respectively arranged on the upper surface and the lower surface of the fourth dielectric substrate. The novel filtering antenna provided by the invention has the characteristics of miniaturization, high selectivity, wide stop band and self-packaging, and can be well applied to the field of wireless communication systems.

The utility model relates to the technical field of antenna structures, and provides a dual-port omnidirectional antenna, which comprises a dielectric substrate; the first antenna main body unit and the second antenna main body unit are arranged on the same surface of the dielectric substrate, the frequency bands of the first antenna main body unit and the second antenna main body unit are different, and the first antenna main body unit and the second antenna main body unit are arranged at intervals along the diagonal line of the dielectric substrate; the first antenna main body unit comprises a main body part and a first extension branch, the first extension branch bends and extends from one end, close to the second antenna main body unit, of the main body part and is spaced from the main body part to form a resonant filtering structure, and the resonant filtering structure is used for generating a radiation zero point in a corresponding frequency band of the second antenna main body unit; the second antenna main body unit is provided with a bending slot, the bending slot is used for generating a radiation zero point in a corresponding frequency band of the first antenna main body unit, and the dual-port omnidirectional antenna is beneficial to miniaturization, good in isolation and excellent in radiation performance.

The utility model relates to a radiation oscillator, a low-frequency radiation antenna and a multi-band antenna. Wherein the radiation oscillator comprises a radiation structure, and the radiation structure is used for radiating a signal and comprises a radiation arm; and the first decoupling structure is arranged at the radiation arm and comprises a first branch knot and a second branch knot, and the longitudinal axis of the first branch knot and the longitudinal axis of the second branch knot intersect with each other. According to the utility model, the first decoupling structure is arranged in the radiation oscillator, so that the interference current coupled by the newly arranged decoupling structure and the interference current coupled by the radiation structure can be mutually and approximately counteracted, and high-frequency suppression on the radiation arm of the low-frequency oscillator is realized. In this way, the low-frequency radiation oscillator can reduce the interference of other radiation oscillators such as a high-frequency radiation oscillator to the low-frequency radiation oscillator, so that the radiation performance of the radiation oscillator is improved, meanwhile, the interference of the low-frequency radiation oscillator to other radiation oscillators is reduced, and the radiation performance of other radiation oscillators is improved.

The invention discloses a mutual coupling improved microwave and millimeter wave common-aperture antenna based on electromagnetic band gap multiplexing, particularly relates to the technical field of microwave and millimeter wave communication, and solves the problems that most of microwave and millimeter wave common-aperture antenna design schemes in the prior art cannot apply a microwave MIMO (Multiple Input Multiple Output) technology; in the prior art, MIMO application is not taken into collaborative design consideration, a solution for MIMO performance loss caused by mutual coupling and the like is lacked, and due to the restriction between microwave and millimeter wave antenna designs, the technical problems of bandwidth reduction, gain reduction, beam forming capability deficiency and the like of sub-antennas are difficult to avoid; according to the technical scheme, extra functions are achieved by multiplexing millimeter wave antennas, mutual coupling between microwave MIMO antennas is restrained, and then the MIMO performance enhancement effect is achieved; the performance of the millimeter wave antenna is reinforced by multiplexing the structure of the microwave antenna part; according to the invention, the performance of the dual-band antenna is improved on the premise of avoiding performance loss.

According to the electronic equipment, a second radiating body and a first radiating body are arranged at an interval, and the second radiating body comprises a second free end, a second feeding point, a first grounding point, a second grounding point, a third feeding point and a third free end; the first feed source is electrically connected to the first radiator and excites the first radiator to support receiving and transmitting of a first wireless signal and excites the first radiator and part of the second radiator to support receiving and transmitting of a second wireless signal together, and the first radiator is a main radiator of the second wireless signal; the second feed source is electrically connected to the second feed point and excites the first radiation section between the second free end and the first grounding point to support receiving and transmitting of a third wireless signal and a fourth wireless signal; the third feed source is electrically connected to the third feed point and excites the second radiation section between the second grounding point and the third free end to support a fifth wireless signal, and the frequency band of the fifth wireless signal and the frequency band of the second wireless signal are at least partially overlapped. Based on this, the electronic device can be miniaturized and can have better antenna performance.

The invention discloses a low-profile ultra-wideband antenna and a working method thereof, and the antenna comprises a radiator which carries out the effective radiation of the antenna at a first frequency band; the antenna feed body and the radiating body are partially projected and overlapped along the direction vertical to the ground plane, and the projected and overlapped parts are mutually coupled to form a coupled feed structure; the antenna feed body is used for transmitting energy to the radiator and serves as the radiator to provide impedance matching in a second frequency band; the coupled feeding structure is used for carrying out coupled feeding, realizing impedance matching of the first frequency band and expanding the impedance bandwidth of the first frequency band; the branch antenna is used for providing radiation in a third frequency band and assisting the radiation of the parasitic antenna in a fourth frequency band; the parasitic antenna provides radiation in a fifth frequency band. The antenna is used for realizing ultra-wide frequency band coverage in a limited space, and good radiation performance and impedance matching effect can be provided in each frequency band.

The invention provides a broadband wide-beam dielectric resonator antenna, which belongs to the technical field of wireless communication and antennas and structurally comprises a dielectric resonator serving as a main antenna radiator, a dielectric substrate A, a metal floor, a dielectric substrate B, a metal microstrip line and a U-shaped metal cavity from top to bottom in sequence. The U-shaped metal cavity serves as a main element of the antenna for realizing a wide beam, is placed at the bottom of the antenna, and is used for introducing vertical current and horizontal current for supplementary radiation; and the metal floor is connected with the U-shaped metal cavity. According to the invention, the bandwidth of the dielectric resonator antenna is expanded through the mode of exciting and combining the grooves and the fundamental mode of the dielectric resonator; the U-shaped metal cavity is formed by bending the floor of the dielectric resonator antenna, so that the beam width of the antenna on the E surface and the H surface is widened. In a working frequency band, the beam widths of the two surfaces are both greater than 180 degrees, so that a radiation effect with stable wide beam characteristics in a relatively wide frequency band is realized; through a method of introducing a metal sheet on the floor, the high-frequency gain is improved while the beam width is maintained.

The invention provides a substrate integrated trapped wave mirror image dielectric waveguide S-shaped circularly polarized antenna, which belongs to the field of antennas and comprises an S-shaped dielectric radiator, a metalized through hole, a microstrip feeder line, a first metal grounding plate, a first dielectric substrate, a second metal grounding plate and a second dielectric substrate, the S-shaped dielectric radiator is embedded in the first dielectric substrate and located in the center of the antenna, the lower surface of the S-shaped dielectric radiator is tightly attached to the second metal grounding plate, the upper surface of the S-shaped dielectric radiator is not covered, a plurality of metalized through holes penetrate through the first dielectric substrate and are arranged on the periphery of the S-shaped dielectric radiator in an array mode, and a gap is formed in the second metal grounding plate. The microstrip feeder is located on the lower surface of the second dielectric substrate and is perpendicular to the gap. The end, away from the gap, of the microstrip feeder is connected to a feed port in the second dielectric substrate. Circular polarization is easy to realize by combining the bent dielectric structure with the slot coupling feed at the bottom, and the radiation efficiency of the antenna is improved by using the notch mirror image structure in the antenna design.

The invention belongs to the technical field of vacuum furnaces, and particularly relates to a vacuum sintering furnace uniform in coke discharge and easy to clean, which comprises a furnace body, a nitrogen heating shunt box is arranged at a furnace door of the furnace body, and nitrogen introduced from the furnace door is heated and uniformly discharged into the furnace body; a carbon felt, a graphite plate and a heating body group are sequentially arranged on the inner side of the furnace body, the heating body group is connected with an external power supply through a power connection device, and the power connection device is used for electrifying and heating the heating body group and adjusting the position of the heating body group according to the filling amount of nitrogen; a coke discharging device is arranged in the middle of the furnace body, and coke gas generated by heating in the furnace body bursts through a sealing device of a coke discharging pipeline in the furnace of the coke discharging device and is discharged from an external coke discharging pipeline through a check valve; the invention solves the problems of non-uniform distribution of injected nitrogen in the furnace chamber, cold impact of injected normal-temperature nitrogen on local workpieces at the furnace door, incomplete coke discharge, low efficiency, difficult maintenance and the like.

This application provides an electronic device, which includes a first device body and a second device body. The first device body has a folded state and an unfolded state relative to the second device body. The first device body includes a first frame and a first metal radiating plate. The first frame has a first antenna radiator and first slits located on both sides of the first antenna radiator. The first metal radiating plate is electrically connected to the first antenna radiator. The second device body includes a second frame and a second metal radiating plate. The second frame has a second antenna radiator and second slits located on both sides of the second antenna radiator. The second metal radiating plate is electrically connected to the second antenna radiator. The first antenna radiator has a feed connection point. The first antenna radiator is positioned corresponding to the second antenna radiator. The first slit is positioned corresponding to the second slit. In the folded state, the first antenna radiator and the second antenna radiator are coupled together through the first metal radiating plate and the second metal radiating plate.

The application discloses a kind of millimeter wave broadband filtering antennas with wide-angle beam scanning function and array, from top to bottom include broadband radiator, metal ground layer and microstrip line feed layer in sequence, the broadband radiator includes first rectangular patch, second rectangular patch and driving patch;By controlling the size of first metal patch, second metal patch and driving patch, the resonant frequency of broadband radiator is regulated;By adjusting the distance between first rectangular patch, second rectangular patch and driving patch, and the spacing of adjacent first metal patch and adjacent second metal patch, the coupling amount of broadband radiator is regulated, and the bandwidth of broadband radiator is further regulated.The application has simple and compact structure, wide impedance bandwidth, and can cover four millimeter wave frequency bands.

The present application relates to the technical field of metallurgical production, in particular to a method for reducing the mixing amount of coke oven gas in lime double-D kiln by oxygen-enriched combustion, specifically, oxygen injection guns and oxygen-enriched valve groups are installed in the air pipeline of the lime double-D kiln to control the oxygen flow, the lime double-D kiln is started, mixed gas containing coke oven gas and converter gas is introduced, the oxygen-enriched valve groups are then started, the oxygen enrichment degree is set from 1% and gradually increased, and the highest oxygen enrichment degree does not exceed 9%, the air-fuel ratio and the excess air coefficient are simultaneously reduced, and the mixed gas flow is reduced. By the method of oxygen-enriched combustion, the oxygen content in the calcination combustion-supporting air is increased, the combustion efficiency is improved, the combustion temperature is optimized, the air demand and the combustion product generation amount are reduced, the heat taken away by the flue gas is reduced, thereby the heat loss of exhaust gas can be reduced, the theoretical combustion temperature and the furnace gas radiation capacity can be improved, and the energy consumption can be greatly reduced.

The present invention discloses a horizontal plane 360-degree beam continuous scanning antenna, comprising a three-polarized radiator and a three-way phase-shifted feeding network connected to each other, wherein the three-polarized radiator is used as the radiator of the antenna to realize the scanning switching of the beam; the three-way phase-shifted feeding network is used to excite the feeding port of the three-polarized radiator, and the feeding phase of the three ports is controlled at the same time. It proposes a new phase-controlled Huygens radiation source structure, which only uses phase control to realize the continuous scanning of the beam in the horizontal plane and the arbitrary angle pointing of the beam, while also taking into account the advantages of miniaturization and low cost, meeting the application requirements of intelligent wireless communication systems.

The present application relates to a kind of high radiation resistance of control rod for stack entropy rare earth zirconate ceramic material and its preparation method and application, belong to nuclear reactor neutron absorption rod material technical field.The control rod ceramic material provided by the present application is prepared by using europium oxide, dysprosium oxide, thulium oxide and zirconium oxide as raw materials, according to certain proportion, after ball milling, calcination, green body forming and green body sintering process, and then processing to obtain the middle entropy rare earth zirconate ceramic material that can be applied to control rod.The rare earth zirconate ceramic material has excellent radiation resistance, large neutron absorption cross section and low reactivity value loss, and has high density, excellent thermal conductivity and low thermal expansion coefficient, and shows good application prospect in the field of control rod materials.

The present invention discloses a directional pattern reconfigurable phase bit antenna and a two-dimensional beam scanning array thereof, belonging to the field of communication technology. The directional pattern reconfigurable phase bit antenna comprises a miniaturized electromagnetic metasurface, a metal patch unit, a dielectric resonator, a phase 1 bit coupling feeding slot, a reflector radiation slot, a phase bit switching circuit, a reconfigurable reflector slot switching circuit, a feeding microstrip line, a switching DC bias circuit, a metal floor, a metal reflector plate and a nylon screw. The array elements in the two-dimensional scanning digital multi-beam array based on a one-dimensional linear array are composed of directional pattern reconfigurable phase bit antennas. The present invention solves the limitation that the existing one-dimensional linear array is difficult to realize two-dimensional multi-beam scanning of the linear array, the limitation that the traditional digital bit array uses a patch radiator resulting in a large size and difficulty in forming an array for wide-angle scanning, the disadvantage of the narrow bandwidth of the traditional digital bit array, and the design limitation that the traditional two-dimensional beam scanning array requires large-scale array elements and occupies a large space.

The utility model provides an antenna module and terminal equipment, and the antenna module comprises a metal frame, the metal frame comprises a first radiation arm, the first radiation arm is provided with a first feeding point and a first grounding point, the first feeding point is connected with a first signal, and the first grounding point is grounded; the first end of the first conductive part is connected with the metal part close to the first radiation arm, the second end of the first conductive part is grounded, and the first conductive part is used for reducing coupling current on the metal part. According to the antenna module and the terminal equipment disclosed by the invention, the first end of the first conductive part is connected with the metal part, and the second end of the first conductive part is grounded, so that the coupling current on the metal part can be guided into the ground by utilizing the first conductive part, and the first signal freely radiated on the metal part is effectively reduced; therefore, the radiation efficiency of the first signal on the first radiation arm is improved, the radiation performance of the antenna module is improved, and the use requirements are met.

The invention belongs to the technical field of antennas, and relates to a marine rescue inflatable antenna, which comprises a base body part, a radiation part and a feed part, the base body component is of a rotary body structure, and an axial air band gap is formed in the center of the rotary body structure so that the base body component can form a cylindrical structure. A closed cavity is formed in the cylindrical structure and is filled with gas, so that the inflatable antenna for sea rescue is formed; the radiation part is arranged on the side surface of the base body part to radiate an antenna signal; the feed component is connected with the radiation component. According to the invention, the efficiency and success rate of sea rescue can be improved.

The invention discloses a whole-body irradiation accelerator, and the accelerator comprises a beam generation device which is used for generating an irradiation beam; the treatment bed is positioned below the beam generating device and is used for bearing a lying patient; and the motion control device is used for controlling the irradiation beam or the treatment bed to move along the longitudinal direction of the lying patient during irradiation so as to realize whole-body irradiation of the lying patient. Due to the fact that in the irradiation period, the patient is subjected to irradiation treatment in a lying mode, the body position is easy to maintain, and the treatment bed is located below the beam generating device, the patient can evenly absorb the irradiation beam, and the irradiation effect is excellent.

The present invention provides a low-radiation anti-fouling coated glass and a preparation method thereof, belonging to the technical field of glass preparation; the preparation process thereof comprises the following steps: preparation of a fluorine-tantalum doped zinc oxide film precursor solution; synthesis of a chain transfer agent; preparation of a modified fluorine-containing copolymer; preparation of a functional film mixed solution; cleaning of a glass substrate; and low-radiation anti-fouling coated glass. The present invention adopts a sandwich structure coating of a zinc oxide film doped with fluorine and tantalum, a silver film, and a zinc oxide film doped with fluorine and tantalum. In the sandwich structure, the silver film is located in the middle layer, and the zinc oxide films doped with fluorine and tantalum are located on both sides. The sandwich structure forms a multilayer film system, which greatly improves the reflectivity of the glass to infrared radiation and achieves a better low-radiation effect. Moreover, the functional film is coated to further achieve a low-radiation effect and increase the anti-fouling ability.

The invention provides an antenna unit, an antenna assembly and terminal equipment, which can be applied to the technical field of communication. The antenna unit comprises a radiator, a dielectric substrate and a feed unit, the radiator comprises a first metal layer and a second metal layer, the first metal layer is attached to the upper surface of the dielectric substrate, the second metal layer is attached to the lower surface of the dielectric substrate, and a gap is formed in the second metal layer; the first metal layer comprises a first metal strip and a second metal strip which are L-shaped and have opposite break angles, and the first metal strip and the second metal strip are respectively coupled with the second metal layer; the first metal strip comprises a feeding point, the feeding unit is coupled with the feeding point, and the feeding unit is coupled with the second metal layer at a grounding point to achieve grounding. The design of the L-shaped bevel metal strip can optimize the radiation performance of the antenna unit and improve the radiation efficiency. The feed unit and the second metal layer are coupled at the grounding point, thereby realizing effective grounding, reducing electromagnetic interference, and improving performance and stability of the antenna unit.

The present disclosure relates to a dual-polarized radiation unit for an antenna, an antenna and an antenna system. A dual-polarized radiation unit for an antenna includes: four dipoles, wherein radiation arms of the four dipoles are planar and symmetrical about the two mutually perpendicular lines, wherein the two mutually perpendicular lines divide the radiation unit into four regions, and a center portion of the four regions is direct current-conducting, and wherein each of the four regions has a hollow region.

This utility model discloses a circuit board, an antenna device, and an electronic device. The circuit board includes a substrate, a first radiating arm, a second radiating arm, and a first ground layer. The substrate includes a first clearance area and a second clearance area spaced apart along a first direction. The first radiating arm is disposed in the first clearance area and has a first ground portion. The second radiating arm is disposed in the second clearance area and has a second ground portion. The first ground layer is disposed on the substrate and offset from the first and second clearance areas. At least a portion of the first ground layer is disposed between the first and second clearance areas to separate the first and second radiating arms. The first ground layer is grounded to both the first ground portion and the second ground portion. This circuit board can meet the isolation requirements of adjacent antennas, facilitating the integration of the radiating arms of the antenna device onto the circuit board, thereby contributing to the miniaturization of electronic devices.

The invention discloses a radio frequency chip integrated packaging structure and technology, and the structure comprises the following steps: carrying out the primary packaging of a first line which is parallel and is uniformly arranged at intervals, and forming a first packaging layer; holes are drilled in the surface of the first encapsulation layer to expose all end points of the first lines, metal is electroplated on the exposed end points to fill the drilled holes, wiring connecting columns are electroplated on a set of diagonal end points arranged on the two edge first lines, and first stand columns are electroplated on the other exposed end points; electroplating a wiring layer on one surface of the encapsulation layer, and electrically rearranging the wiring connecting columns; the electrical end of the bare chip is electrically connected and mounted with the corresponding wiring layer, and the bare chip and the wiring layer are encapsulated again to form an encapsulation layer II; drilling holes in the surface of the encapsulation layer II to expose the end points of the upright posts I, and electroplating upright posts II on the exposed end points to fill the drilled holes; the bare chip is located in the geometric center of the three-dimensional coil, the induction current and the signal intensity are optimal, the three-dimensional coil has the more omnidirectional induction characteristic, and stable coupling can be kept.

The embodiment of the utility model provides a wireless network expander. The wireless network expander comprises a circuit board, a first shielding assembly, a first antenna and a second antenna, the first shielding assembly comprises a shielding cover body and a heat dissipation piece, the shielding cover body is arranged on the circuit board, and the heat dissipation piece is arranged on one side of the shielding cover body. In the first direction parallel to the circuit board, the first antenna and the second antenna are located on the two opposite sides of the first shielding assembly and electrically connected with the circuit board. Therefore, the mutual interference between the first antenna and the second antenna is reduced, and the radiation performance of the wireless network expander is improved. And the portability of the wireless network expander is also facilitated.