30results about How to "Increase the effective radiation area" patented technology

A high-gain low-profile null feed array antenna comprises a metal cover plate, a metal side plate, a metal bottom plate and a feed source. The metal cover plate locates at the upper part, the metal bottom plate locates at the lower part and the metal side plate locates at the middle part; the metal cover plate, the metal bottom plate and the metal side plate are connected with each other to form a cavity in which the feed source is arranged; the metal cover plate is a metal flat plate which is provided with a group of gap units arranged periodically; the feed source comprises a feeding patch located in the middle of the housing and a group of passive parasitized patches around; the feeding patch and the parasitized patch are printed on the upper surface of a same dielectric substrate; the lower surface of the dielectric substrate is attached on the upper surface of the metal bottom plate; and the feeding patch is activated by a cable through a radio frequency coaxial joint. The antenna has the advantages of simple feeding, high gain of more than 20dBi, high caliber efficiency of more than 60 percent and low cost.

The invention discloses a flat double P type radiant tube which comprises a first straight tube, a three-way tube, a second straight tube, a third straight tube, a first bent tube and a second bent tube. A burner is fixed into a first straight tube mounting pipe, a central spray tube is a gas jet, four spray tubes on the outer side are air jets, the sections of all the spray tubes are elliptic, the proportion of a long edge and a short long edge of an ellipse is as same as that of a long edge and a short long edge of the section of a radiant tube body, and the first straight tube and the three-way tube are thickened. The flat double P type radiant tube has the advantages that the thickened first straight tube can effectively prevent tube wall failure caused by high-temperature corrosion, the thickened three-way tube can prevent bent tube deformation caused by heat stress, and the section of the radiant tube body is elliptic. Compared with a circular radiant tube consuming the same alloy steel, the effective radiant area of the radiant tube for a workpiece is enlarged, and the heat exchange amount of the radiant tube and the workpiece within unit time is increased. Burning flame diffuses towards two sides of the radiant tube, the radiant temperature of two side wall surfaces of the radiant tube is increased, and the temperature of the radiant tube is uniformly distributed.

The invention provides a mobile terminal, relates to the technical field of communication, and is used for increasing a radiating area of an NCF (Near Field Communication) antenna in the mobile terminal to improve the performance of the NCF antenna. The mobile terminal comprises a rear housing and a metal frame; a flexible printed circuit board is attached inside the rear housing; the flexible printed circuit board is provided with a first feed point, a second feed point, a first connection point and a second connection point; the first feed point is electrically connected with the first connection point; the second feed point is electrically connected with the second connection point; the first feed point and the second feed point are overlapped with a metal area; the first connection point and the second connection point are overlapped with a non-metal area; a third connection point and a fourth connection point are arranged on the metal frame; the third connection point is electrically connected with the first connection point; the fourth connection point is electrically connected with the second connection point; and the metal frame among a first metal routing, a second metal routing, the third connection point and the fourth connection point is formed into an annular loop, thereby realizing receiving and sending of NFC signals. The mobile terminal provided by the invention is used in manufacturing of the mobile terminal.

The invention discloses a low-frequency broadband efficient array forming structure based on a bent disc transducer, which mainly comprises a transmitting array. The transmitting array comprises a plurality of groups of transducer units, the transmitting array is formed by arranging a plurality of groups of same transducer units at equal intervals in the horizontal direction, and the postures of the transducer units in the transmitting array are consistent; the acoustic center distance between the transducer units is not greater than the half wavelength of the transducer units at a resonant frequency point, and therefore the near-field mutual radiation influence on each group of transducer units is kept consistent; each transducer unit is formed by arranging one or more bent disc transducers in the axial direction. Radiation impedance of the bent disc transducers can be changed by arraying the bent disc transducers according to a specific arraying mode, and therefore resonant frequencyof a transmitting array is reduced; working bandwidth is expanded, electro-acoustic efficiency is improved; the transmitting array is enabled to meet development requirements of a future maneuveringdetection system.

The invention provides a membrane type water cooled low NOx gas combustion device. A cylindrical membrane type water cooled combustion head, a ring-shaped water chamber, a flow sharing device, an air-fuel mixing device, an ignition and fire detection integrated device, a fan, an air inlet silencer, a burner connection flange, a water inlet and outlet, and a gas inlet are included, the membrane type water cooled combustion head is fixedly connected with the ring-shaped water chamber, the air-fuel mixing device is fixed on the ring-shaped water chamber, and the fan is connected with the air-fuelmixing device and provided with the air inlet silencer. The membrane type water cooled low NOx gas combustion device can be installed horizontally, vertically or obliquely, is convenient to disassemble and replace, and can be suitable for existing gas boilers with any forms. According to the membrane type water cooled low NOx gas combustion device, the structure is simple, processing is easy, theflue-gas temperature can be effectively lowered, internal flue-gas recirculation is formed, the effective radiating area of a furnace is increased, and the combustion flame front temperature is lowered, so that production of NOx is lowered.

The invention provides a miniature loudspeaker, which comprises a shell, a vibration system and a magnetic circuit system, and is characterized in that a support plate is arranged in the shell; a first through hole is formed in the support plate; the vibration system comprises a voice coil, a first vibrating diaphragm, a diaphragm, a second vibrating diaphragm, a hollow first connecting piece clamped between the first vibrating diaphragm and the diaphragm, and a hollow second connecting piece clamped between the diaphragm and the second diaphragm, wherein the first vibrating diaphragm, the diaphragm and the second vibrating diaphragm are sequentially arranged at intervals along the short axis direction of the voice coil; the first vibrating diaphragm and the second vibrating diaphragm arefixedly held on the shell; the diaphragm is fixedly held on the support plate and covers the first through hole; the first vibrating diaphragm is connected with the voice coil; the first vibrating diaphragm, the shell, the support plate and the diaphragm form a first vibrating diaphragm front cavity; a second through hole is formed in the diaphragm; a third through hole is formed in the second vibrating diaphragm; and the first vibrating diaphragm front cavity is communicated with the outside through the hollow structure of the first connecting piece, the second through hole, the hollow structure of the second connecting piece and the third through hole in sequence. According to the miniature loudspeaker provided by the invention, higher bass performance can be realized.

The invention relates to a horn antenna, in particular to a plane horn antenna capable of achieving gap embedding amplitude calibration. The antenna comprises a micro-strip feeder line (1), a horn antenna body (2) and gaps (3), wherein the micro-strip feeder line (1), the horn antenna body (2) and the gaps (3) are integrated on a dielectric substrate (4). The micro-strip feeder line (1) is connected with an antenna port (5) and an antenna narrow port (6). The horn antenna body (2) is composed of a first metal plane (8), a second metal plane (10) and two rows of metallization via hole horn side walls (11), four sub-horns are formed in the horn antenna body (2) through the middle gap (14), the left gap (20) and the right gap (21) forming the gaps (3), one ends of the four sub-horns are close to the antenna narrow port (6), and the other ends of the four sub-horns are close to but no reach an antenna aperture face (19). The aperture efficiency and the gain of the antenna can be improved.

The invention provides a packaging sandwich antenna with a function of gap embedded phase amplitude calibration, and relates to a horn antenna. The antenna comprises micro-strip feeder line (1), a horn antenna (2) and gaps (3), wherein the micro-strip feeder line (1), the horn antenna (2) and the gaps (3) are integrated on a dielectric substrate (4); the dielectric substrate (4) is located on the inner layer of a three-dimensional package (5); one end of the micro-strip feeder line (1) is connected with an internal circuit (8) through a coplanar waveguide (7) on the packaging side surface; the horn antenna (2) comprises a bottom surface metal plane (9), a top surface metal plane (10) and metallized via hole horn side walls (11); a middle gap (16), a left gap (17) and a right gap (18) are formed in the bottom surface metal plane (9) and the top surface metal plane (10); four sub-horns are arranged in the horn antenna (2), one end of each sub-horn faces the micro-strip feeder line (1), and the other end of each sub-horn is closer to but does not reach an antenna aperture surface (12). With the adoption of the antenna, the antenna gain can be improved.

The invention relates to an antenna which comprises a first dielectric substrate and a second dielectric substrate. Metal sheets are arranged on two surfaces of the dielectric substrates, space area of the antenna is used fully, and the antenna can be operated at low operating frequency under the environment and simultaneously meets requirements for miniaturization, low operating frequency and broadband multi-mode. In addition, a multiple input multiple output (MIMO) antenna with a plurality of the antennas is further related. The MIMO antenna has high isolation.

The invention discloses an aviation airborne knife-shaped antenna, relates to the technical field of aviation airborne antennas, and solves the problems that most of existing conductor antennas and outer antenna shells are of closed integrated structure design, and parts are inconvenient to disassemble for maintenance and replacement. The aviation airborne knife-shaped antenna comprises shell antenna plates, each shell antenna plate comprises air deflectors, a blocking and leaning surrounding strip and a positioning wedge block, the front ends and the rear ends of the two shell antenna platessymmetrically and obliquely support the two air deflectors, and the two shell antenna plates are bilaterally symmetrical and jointly support to form a shell of a main body; a threaded locking rod is hoisted in the middle of a groove in the bottom of a mounting seat in a cross-brace manner; a through groove is formed in the top end supporting and connecting plate of the shell antenna plate, and thetop end section of the lifting antenna plate is inserted into the through groove in an abutting mode. The two rows of squeezing and pushing plates can be limited and slide between the squeezing and pushing plates and the top plate of the mounting base through the two limiting barrier strips, and the squeezing and pushing plates are prevented from rotating along with screwing and shaking of the threaded locking rod.

The invention discloses a single-feed circularly polarized RFID reader-writer antenna, which comprises radiation patches, a grounding probe, an FR4 dielectric plate, a perturbation ring patch, a coaxial connector and a metal floor, the radiation patches comprise a square patch and four 270-degree fan-shaped patches, and are positioned on the upper surface of an upper dielectric plate; the four 270-degree fan-shaped patches comprise a first fan-shaped patch, a second fan-shaped patch, a third fan-shaped patch and a fourth fan-shaped patch, and the circle centers of the four fan-shaped patches coincide with the four right-angle vertexes of the square patch respectively. According to the single-feed circularly polarized RFID reader-writer antenna, by introducing the perturbation ring patch, the impedance matching performance of the antenna is improved, and the circular polarization bandwidth of the antenna is broadened; the gain of the antenna is improved by adopting the grounding probe;in addition, the antenna has the characteristics of the simple structure, low cost, the light weight and the like, and is very suitable for application of ultrahigh frequency radio frequency identification reader-writer antennas in China and multiple countries.

The invention relates to an antenna structure and terminal equipment. The antenna structure is applied to the terminal equipment, and the antenna structure comprises a partial conductive shell which is provided with a first gap; and a radiator arranged on the inner side of the conductive shell, wherein the radiator is provided with a second gap, the second gap is covered on the first gap, and the radiator and the conductive shell can be coupled at the first gap and the second gap to form an antenna for receiving and transmitting at least one frequency band. According to the embodiment of the invention, the wireless signal is transmitted and received through the coupling of the radiator and the conductive shell, and the use of a spring needle or an elastic sheet and other type of feed mechanisms can be avoided, so that the feed structure and the installation process required for transmitting and receiving the wireless signal at the first gap of the conductive shell are simplified, and the antenna manufacturing efficiency is improved.

The invention discloses a loudspeaker and electronic equipment, and the loudspeaker comprises a magnetic circuit system which comprises a first magnet part and a second magnet part which are arranged at an interval, a first magnetic gap is formed between two opposite opposite magnetic poles at the upper parts of the first magnet part and the second magnet part, and a second magnetic gap is formed between two opposite opposite magnetic poles at the lower parts of the first magnet part and the second magnet part, and the magnetic pole distribution directions of the two opposite opposite magnetic poles at the upper part and the two opposite opposite magnetic poles at the lower part are opposite; the axial direction of a flat voice coil is perpendicular to the vibration direction of the vibrating diaphragm, the flat voice coil is provided with two first wire sections which are distributed in the vibration direction at intervals, and the two first wire sections are located in the first magnetic gap and the second magnetic gap respectively; a long-strip-shaped shell forms an accommodating space, the accommodating space is used for accommodating and fixing the vibration system and the magnetic circuit system, the shell is provided with a first end part and a second end part which are opposite to each other, the first end part is connected with the vibrating diaphragm, and the width size of the first end part is larger than that of the second end part.

The invention relates to a horn antenna, in particular to a three-dimensional encapsulation surface antenna capable of achieving gap embedding amplitude calibration. The antenna comprises a metallization perpendicular via hole feeder line (1), a horn antenna body (2) and gaps (3), wherein the metallization perpendicular via hole feeder line (1), the horn antenna body (2) and the gaps (3) are integrated on a dielectric substrate (4) which is located on the topmost face of a three-dimensional encapsulation part (5), and one end of the metallization perpendicular via hole feeder line (1) is connected with an internal circuit (8). The horn antenna body (2) is composed of a bottom face metal plane (6), a top face metal plane (9) and metallization via hole side walls (11), the gaps (3) are formed in the bottom face metal plane (6) and the top face metal plane (9), and four sub-horns are formed in the horn antenna body (2) through the middle gap (17), the left gap (18) and the right gap (19), and electromagnetic wave energy in the antenna is distributed on an antenna aperture face (12) at equal amplitude. The aperture efficiency of the antenna can be improved.

The invention provides a radiometer. The radiometer comprises a lamp source, a host and a supporting device used for supporting the lamp source and the host, wherein the lamp source and the host are oppositely arranged in parallel up and down; the lamp source comprises a lampshade, a lamp holder and an LED chip arranged on the lamp holder, the LED chip is arranged in the lampshade, and the LED chip comprises a UVB lamp bead, a UVA lamp bead and a blue light lamp bead; and the host comprises a radiation intensity probe, and the radiation intensity probe is used for detecting the radiation intensity of UVB, UVA and blue light. The radiometer can establish ultraviolet and blue light related biological detection models at the same time.