49results about How to "Withstand high power" patented technology

The invention relates to a multi-point excitation loudspeaker array which is characterized in that: the array comprise a basin rack which is provided with at least five independent sound cavities, a number of the sound cavities is an odd number, each sound cavity is provided with a loudspeaker unit, all loudspeaker units are arranged in straight lines in the basin rack and are on a same installation plane, and distances between adjacent loudspeaker units are same. The invention has the characteristics of ingenious structure, simplicity and compactness, the loudspeaker units are arranged in an easily realized mode, when adding the loudspeaker units, small directive change of the whole array is ensured, total harmonic distortion and unevenness of the array are decreased, thus a sound pressure level of the array is raised, sound quality and reliability are ensured, and the array can be designed as a component integrated in a flat television or an external accessory of the flat television to improve the sound quality further. The multi-point excitation loudspeaker array has the advantages of good frequency response, excellent directive, large bearing power, small distortion, a high sound pressure level and the like.

The invention discloses a terahertz waveguide polarization attenuating device, comprising a housing, an electromagnetic wave transceiving unit arranged in the housing, a first off-axis paraboloid mirror, a second off-axis paraboloid mirror, a polarization grid, a turntable and a microwave absorbing assembly. The device has the advantages of wide working band range, large attenuation dynamic range,high attenuation precision and large bearing power, and each module of the device can be conveniently disassembled. In the case of large frequency range span, the module can be simply replaced to form the attenuation device in the required frequency band.

The invention provides a miniaturized high-gain dual-polarized omnidirectional antenna comprising a V-polarized antenna, an H-polarized group array antenna and an H-polarized subarray feeder panel. The V-polarized antenna comprises M half-wave vibrators which are arranged on the V-polarized antenna substrate and V-polarized antenna feeders which are connected with the half-wave vibrators. The H-polarized group array antenna comprises N H-polarized array units which are arranged in parallel to form the array. Each H-polarized array unit comprises a dielectric disc. The circumference of the dielectric disc is provided with X H-polarized vibrators and H-polarized antenna feeders which are connected with the H-polarized vibrators. The V-polarized antenna is arranged at the external side of theH-polarized subarray feeder panel in parallel. The H-polarized array units are arranged to be intersected with the H-polarized subarray feeder panel and the V-polarized antenna. The H-polarized subarray feeder panel performs feeding to the H-polarized array units, wherein M, N and X are natural numbers greater than or equal to 1. The omnidirectional antenna of being high-gain, omnidirectional, dual-polarized, high-isolation, high-power, short and beautiful, simple in structure and economical and durable can be provided for the outdoor WIFI wireless access point.

The invention relates to a strip-shaped loudspeaker box with mirror image type low-frequency radiators. A box body is in a long flat strip shape. Low-frequency radiator installation holes symmetrical in position are formed in the upper and lower surfaces of the right half part, in the long axis direction, of the box body respectively, and the two low-frequency radiators are correspondingly installed in the two upper and lower low-frequency radiator installation holes in a mirror symmetry mode. A mid-low-pitch loudspeaker installation hole is formed in the left half part, in the long axis direction, of the box body, a mid-low-pitch loudspeaker is installed in the mid-low-pitch loudspeaker installation hole, and the mid-low-sound loudspeaker radiates sounds towards the part over the box body. A high-pitch loudspeaker installation table is arranged on the front side face of the left end, in the long axis direction, of the box body, a high-pitch loudspeaker is installed on the high-pitch loudspeaker installation table, and the high-pitch loudspeaker radiates sounds towards the part right ahead of the box body. The strip-shaped loudspeaker box has the acoustic properties of being small in distortion, good in low frequency, capable of bearing high power and excellent in high-frequency performance; the transient stability of the loudspeaker box can be improved, and thus the loudspeaker box can achieve a good sound effect when radiating low-frequency sounds.

The invention relates to a sound box based on an oppositely buckled passive radiator. The sound box comprises a prolate box body, a high pitch loudspeaker mounting hole and a mid-bass loudspeaker mounting hole distributed along the length direction of the box body are opened in the top of the box body, a high pitch loudspeaker unit is mounted in the high pitch loudspeaker mounting hole, and a mid-bass loudspeaker unit is mounted in the mid-bass loudspeaker mounting hole; a passive radiator unit is mounted on the right side of the mid-bass loudspeaker unit through a radiator bracket, and the central axial line of the passive radiator unit is mutually parallel to the central axial lines of the high pitch loudspeaker unit and the mid-bass loudspeaker unit; the radiator bracket is provided with two sound outlets which are symmetrically arranged at 180 degrees, the two sound outlets respectively face to front and back side faces of the box body, and sound outlet holes communicated with the sound outlets are respectively formed in the front and back side faces of the box body. The sound box provided by the invention both has the advantages of the passive radiator sound box and can perfect the defects of poor vertical transient stability, high cut-off frequency and large total loss Ql value, so as to ensure a good sound effect for the sound box.

The present invention provides a protecting component which realizes small size and slimness and senses the heating of a resistance heating component for reliable operation thereby improving reliability, and a protecting device with the protecting component. The protecting component (10) comprises the following components: a ceramic chip body (12); a fusible alloy fuse component (20) which is configured on a surface of the ceramic chip body (12); the resistance heating component (25) which is configured in a through hole (24); and leading-out leads (15-17) which are configured to a back surface. The heating component (25) is composed of a resistor with a preset resistance value and is in a filling state because the heating component is embedded in the through hole (24). Therefore the heat of the resistor causes the fusible alloy fuse component (20) to operate correctly and quickly through the ceramic chip body (12) with excellent heat conductivity. Particularly, the protecting component has the following practical effects: enlarged bearing power of the resistance heating component (25), effectively exerted space efficiency, and facilitated back length reduction, size reduction and slimming.

The invention relates to a thin type loudspeaker sound box. The thin type loudspeaker sound box comprises a box body for containing at least one thin type loudspeaker, a low-frequency sound-guiding plate is arranged right above sound radiation of the thin type loudspeaker, at least a tweeter unit is arranged in the box body, an upper shell of the box body, close to the tweeter unit, is provided with high-pitch radiating grooves to improve the reliability of the tweeter unit during long-term full-load operation, and the thin type loudspeaker is formed by a frame, a U-yoke, a magnet, a T-yoke, a voice coil, a cone with edges, a positioning support plate, and a wiring board. The cone with the edges and the positioning support plate are specially designed so that the overall structural height is reduced on the precise of not reducing the output sound pressure level of the loudspeaker, and the installation and the application in the thin type sound box can be facilitated. According to the thin type loudspeaker sound box, the low-frequency tone quality can be improved with thinner structure, and the reliability is improved.

The invention relates to a full-band television transmitting antenna based on rhombic oscillators. Dipole group arrays are rhombic dipole group arrays which are formed by four pairs of rhombic dipoles through coaxial arrangement; a multi-section broadband adjustable power divider feed network is divided into a vertical part and a horizontal part, the horizontal part is parallel to a reflecting board, the external conductors of the vertical part and the horizontal part are connected by square copper blocks, and the square copper blocks are fixed on the reflecting board; the external conductor of the output end of the multi-section broadband adjustable power divider feed network is connected with the internal side strip of a strip-shaped parallel line, and the internal conductor stretches out to be connected with the external side strip of the strip-shaped parallel line; and one end of the a balun transmission line is connected with the center of the external side strip of the strip-shaped parallel line, and the other end is connected with the square copper blocks. A mode of parallel feeding of the rhombic dipole group arrays is adopted so that working bandwidth of which standing-wave ratio less than 1.2 is enabled to be more than 360MHz, and a full-band transmitting function is realized; and bearing power is high, manufacturing cost is low, and thus the full-band television transmitting antenna based on the rhombic oscillators is especially suitable for a decimetric wave band ground television transmitting system.

The invention relates to a digital television transmitting antenna based on an E-shaped patch. The digital television transmitting antenna comprises a formation plate, the E-shaped patch, a rectangular parasitic patch, an input connector and a retaining screw, wherein the rectangular parasitic patch, the E-shaped patch and the formation plate are orderly arranged in parallel from top to bottom to form a main structure of a stacked antenna; the E-shaped patch is provided with two symmetric rectangular gaps, and the length of a middle wing is smaller than that of two sides; an outer conductor of the input connector is fixed on the formation plate, and an inner conductor of the input connector penetrates through the formation plate and is connected to the E-shaped patch to feed; the rectangular parasitic patch at the upper layer is coupled by the E-shaped patch to feed. The digital television transmitting antenna based on the E-shaped patch provided by the invention satisfies the use requirement of a terrestrial television broadcasting transmitting system by adopting a multi-resonator technology to improve the impedance bandwidth and power handling of antennas; the invention has the characteristics of being wide in working band, high in gain, small in input standing-wave ratio, high in power handling, simple in processing, convenient in debugging and the like, and is applicable to a terrestrial television transmitting antenna system of a decimeter wave band.

The invention provides a direct-current path integrated broadband strip-line combiner which comprises a cavity, a cover plate and a transmission wafer, wherein the bottom of the cavity body is provided with a plurality of teflon bases, the transmission wafer is arranged on the teflon bases, the two sides of the cavity are respectively provided with a connector, the transmission wafer is connected with the inner conductors of the connectors, and the cover plate is fixed on the cavity through screws. The combiner skillfully physically merges a direct-current path and a radio frequency channel together without an extra direct-current path. The combiner is simple in structure, easy to produce, small in volume, excellent in performance, and large in bearing power; and radio frequency and DC (direct current) share the transmission wafer without the extra direct-current path, and the transmission wafer is prepared through one-step forming, so that the combiner is low in cost, easy to machine, high in assembling efficiency, and suitable for mass production.

The invention discloses an overmoded high power pulse detector. A hot carrier effect of a strong electric field in a semiconductor is taken as a basic working principle, and measurement is realized according to resistance variation of the semiconductor. The detector comprises a WR2.8 standard waveguide with a smaller outlet surface, a WR2.8-WR8.0 transition waveguide with an outlet surface changing from small to large, a WR8.0 standard waveguide with a relatively larger outlet surface, a semiconductor detection chip and a matching load at the rear end. The peak power which can bear a pulse can reach 100 W, the response speed is smaller than 1 ns, and the difficulty in detection chip processing and detector integration is relatively smaller. The detector is suitable for high power pulse measurement in a frequency range of 0.3-0.4 THz.

The invention relates to a surface-mounted microwave circulator with novel port structure, wherein, a shell is of semi-open cylindrical cavity structure; the side wall of the shell is provided with three port slot holes; bosses are respectively arranged on the positions on the side wall of the shell, corresponding to the three port slot holes; the semi-open cylindrical cavity of the shell is internally provided with a permanent magnet, a uniform magnetic conducting strip, a ferrite, a central conductor and a temperature compensation strip; the top of the shell is covered with a cover board; the central conductor extends out of the cavity through the port slot holes on the side wall of the shell; the three bosses on the side wall of the shell are provided with through holes, and each through hole is provided with a port pin insulator; each port pin insulator is provided with a port pin; and the three port pins are electrically connected with the central conductor. The package structure obviously improves the reliability of the microwave circulator and obviously enhances the welding qualification rate without changing the performances of the circulator. The surface-mounted microwave circulator has the advantages of small volume, excellent performances, high power handling, wide temperature range and the like, thus being applicable to large-scale production.

The invention discloses a full-band double-layer trapezoidal digital television transmitting antenna, which includes an antenna unit, a connector, and a reflection plate. The connector supplies powerto the antenna unit. The connector and the antenna unit are fixed to the reflection plate. The antenna unit includes two groups of double-layer trapezoidal dipole units, adjustable insulating screws,a first feeding metal strip, a second feeding metal strip, a stepped linear impedance converter, a balun structure and a support structure. The stepped linear impedance converter includes a vertical linear impedance converter, a horizontal stepped impedance converter, and a compensating complex impedance connector which are connected successively. The full-band double-layer trapezoidal digital television transmitting antenna can cover the full frequency band of a digital television, can withstand large power, has a low voltage standing wave ratio, low cost, and high gain, and is easy to debug.

The invention discloses an ultra-wideband frequency band synthesis circuit. The ultra-wideband frequency band synthesis circuit comprises a through path and a coupled path. A low frequency band input port and a synthesis output port are arranged on two ends of the through path. A high frequency band input port and a load port are arranged on two ends of the coupled path. The through path and the coupled path are composed of microstrip lines. The microstrip lines are made of ceramic sheets or white sapphire sheets. Both the thickness and the width of the microstrip lines are 0.127 mm, and coupled gaps among the microstrip lines are 0.127mm. The ultra-wideband frequency band synthesis circuit has the advantages that 250KHz-70GHz frequency band synthesis bandwidth requirements are met, the borne power is relatively large, the loss of the frequency high end is less than that of a conventional method, and the power of the high end is saved.

The invention relates to a digital television transmitting antenna of a horn structure. The digital television transmitting antenna of the horn structure comprises a horn shaped dipole array, a branch feeder conductor, a multi-section wideband tunable power divider network, an input connector and a reflector plate; the horn shaped dipole array is composed of multiple pairs of horn shaped dipoles in a coaxial arrangement and forms a horizontally polarized antenna array; an output end of the multi-section wideband tunable power divider network is connected with the branch feeder conductor; the branch feeder conductor and an inner surface of a metal tube form a coaxial line; the branch feeder conductor stretches out from one dipole of each pair of the horn shaped diploes, and is connected with another dipole; an outer conductor of the input connector is fixed on the reflector plate, and an inner conductor of the input connector penetrates through the reflector plate and is connected with an input end of the multi-section wideband tunable power divider network. The digital television transmitting antenna of the horn structure provided by the invention satisfies the use requirement in a terrestrial radio and television transmitting system by improving the impedance bandwidth and power handling of array antennas, and has the characteristics of being wide in working band, small in input standing-wave ratio, high in power handling, simple in processing, easy in debugging and the like.

The invention discloses an electric-control switching multi-polarization horn antenna, and relates to the technical field of a communication antenna. The horn antenna comprises a horn antenna body andalso comprises a polarization controller and a polarization switching device, wherein the control module is used for enabling the horn antenna to work in modes of horizontal polarization, vertical polarization, left-hand circular polarization or right-hand circular polarization by controlling a linear polarization control generation module, a circular polarization control generation module and apolarization selection module. By the antenna, rapid switching among different polarization modes can be achieved, and switching employs electric switching rather than artificial antenna replacement.With the adoption of the antenna, the test time can be effectively reduced, the frequency of replacing the antenna by a tester is reduced, and the characteristic of a tested device under various polarization modes is more accurately measured.

The invention discloses a full-duplex meteoric trail communication device based on a single antenna, and relates to the field of meteoric trail communication. The device comprises a link controller, a modem, a transceiver, a power amplifier, and a diplexer. The device employs the diplexer which is large in withstood power, is small in incoming loss, and is high in receiving and transmitting isolation. A receiving channel and a transmitting channel are combined into one full-duplex channel under the condition of guaranteeing the communication performance of a system. The full-duplex communication between different meteoric trail communication devices can be completed through one antenna, thereby reducing the number of antennas, reducing the requirements for an antenna construction field, and shortening the starting construction time of meteoric trail communication. The device is large in withstood power, is high in receiving and transmitting isolation, is simple and convenient in starting construction, is high in integration degree, is stable and reliable in performance, is especially suitable for a meteoric trail communication occasion where the antenna construction field is limited and there are special requirements for starting construction.

The invention relates to a virtual seven-channel strip sound box. A left-end-arranged loudspeaker is arranged on the left end face of a strip box body; a right-end-arranged loudspeaker is mounted on the right end face of the strip box body; the left-end-arranged loudspeaker and the right-end-arranged loudspeaker are symmetrical to each other in a mirrored manner; a left-front-arranged loudspeaker, a middle-front-arranged loudspeaker and a right-front-arranged loudspeaker are mounted on the front lateral surface of the strip box body; the middle-front-arranged loudspeaker is positioned at the middle position of the strip box body in the long axis direction; the left-front-arranged loudspeaker and the right-front-arranged loudspeaker are symmetrically arranged at both left and right sides of the middle-front-arranged loudspeaker; a left-top-arranged loudspeaker and a right-top-arranged loudspeaker which are bilaterally symmetrical are mounted at the top of the strip box body; a projection position of the left-top-arranged loudspeaker on a plane is positioned between the left-front-arranged loudspeaker and the middle-front-arranged loudspeaker; and a projection position of the right-top-arranged loudspeaker on the plane is positioned between the middle-front-arranged loudspeaker and the right-front-arranged loudspeaker. The virtual seven-channel strip sound box disclosed by the invention can achieve a stereoscopic surrounding effect, improves transient stability of a sound system, and is low in distortion, good in low frequency and high in bearable power.