2380 results about "Coaxial line" patented technology

The invention discloses a full-carbon coaxial line and a manufacturing method of the full-carbon coaxial line, and belongs to the technical field of integrated circuits. Graphene serves as a monatomic layer thickness, is coiled into a cylinder and form an inner conductor of the coaxial line with a small radius (can be as small as the nm level), and the inner conductor of the coaxial line transfers currents. Meanwhile, a signal layer or multiple layers of graphene serve(s) as an outer conductor of the coaxial line to form a boundary of electromagnetic waves in a space, and graphite oxide serves as medium materials between the inner conductor and the outer conductor to limit and guide oriented transmission of electromagnetic wave energy. The coaxial line is quite small in size and applicable to radio-frequency and microwave integrated circuits.

The invention discloses a circular polarized antenna with a wide wave beam width and a small size. The antenna comprises a square paster; two notch grooves of an open circuit of a terminal are arranged on the square paster, wherein the two notch grooves are mutually orthogonal; the paster is fixed on a square grounding reflecting surface by a coaxial line. And four short-circuit columns of the open circuit of the terminal are arranged on the reflecting surface, so that the size of the reflecting surface is reduced. According to the invention, a signal feeding technology is utilized to excite the two orthogonal notch grooves to work in a circular polarization mode. According to the invention, an impedance bandwidth reaches 19%, wherein a standing-wave ratio is less than 2; and a 3d axial ratio bandwidth reaches 3.8%. In an axial ratio bandwidth, a 3d B wave beam width reaches a value by adding 101.4 degrees with 1.4 degrees or subtracting the 1.4 degrees from the 101.4 degrees as well as a gain reaches a value by adding 5.76dBi with 0.18dBi or subtracting the 0.18dBi from the 5.76dBi. The circular polarized antenna has advantages of compact antenna dimension, light weight, low cost and easy manufacture. Especially, the circular polarized antenna has advantages of good impedance bandwidth, wide radiation wave beam, and high gain. Therefore, the circular polarized antenna can be widely applied to satellite communication and traffic navigation.

The invention relates to millimetric packaged electronic components for applications at high frequencies greater than 45 GHz. According to the invention, to facilitate the design of a system including MMIC chips working at these frequencies, it is proposed to use packages containing one or more chips, these packages making it possible to work at these frequencies and including two types of port: a port with transition by contactless electromagnetic coupling providing a connection with an antenna at the high working frequency F via a waveguide; and a port with microstrip or coaxial line type transition enabling a connection at a subharmonic frequency F/N (preferably N=6 or 4 or, if necessary, 3) of the working frequency.

A transmission line for downhole tools that make up all or part of a tool string for drilling and production of oil, gas, and geothermal wells that can withstand the dynamic gravitational forces and other accelerations associated with downhole excavations. The transmission line comprises a metal tube, or outer conductor, that houses a coaxial wire inner conductor. A non-metallic dielectric material is interposed between the inner and outer conductors. The outer and inner conductors and the dielectric are sufficiently compressed together so that independent motion between them is abated. Compression of the components of the transmission line may be achieved by drawing the transmission through one or more dies in order to draw down the outer conductor onto the dielectric, or by expanding the inner conductor against the dielectric using a mandrel or hydraulic pressure. Non-metallic bead segments may be used in aid of the compression necessary to resist the dynamic forces and accelerations of drilling.

The invention relates to an expansion shaft which comprises a cylindrical main body of the expansion shaft. The expansion shaft is characterized in that a hole in the same coaxial line of the main body is formed in the main body, an ejector rod in the same coaxial line of the hole is arranged in the hole, one end of the ejector rod is inserted into the main body, the other end of the ejector rod is connected with the end of the main body through threads, the ejector rod is provided with tapered ejection blocks, at least two radial through holes are arranged in positions, corresponding to the tapered ejection blocks, of the main body, an expansion rod is inserted into the radial through holes, and the lower end of the expansion rod presses the tapered ejection blocks in an abutted mode. The expansion shaft has the advantages of being simple in structure, convenient to use, easy to maintain and detect and low in cost.

The invention relates to a device for electrically connecting a coaxial line to a printed circuit card having at least two conductor tracks each extending to an edge of said card. The device has an outer contact and a center contact received inside the outer contact. The outer contact has a portion for connection to the card that is substantially tubular in shape, being provided with two diametrically-opposite slots which subdivide said connection portion into two jaws arranged to pinch between them said card inserted via its edge between said jaws, and the center contact has portion for connection to the card in the form of a clip into which the edge of the card is engaged when the card is inserted between the two jaws of the outer contact.

The invention discloses a low-profile broadband dual polarization omni-directional antenna. The antenna comprises a vertical polarization monopole antenna and a horizontal polarization loop antenna which are arranged side by side, and the loop antenna is composed of four rotational symmetric arc-shaped dipoles. A metal cylinder wraps a monopole feed probe to increase the monopole bandwidth, and parasitic units and directors are loaded outside dipole arms to increase impedance bandwidth of the loop antenna and gain out-of-roundness of the loop antenna on azimuth planes is reduced. The low-profile broadband dual polarization omni-directional antenna basically comprises an upper medium plate (1), a lower medium plate (2), plastic screws (3), a round patch (4), a loop patch (5), the feed probe (6), the metal cylinder (7), a metal floor (8), metal short circuit columns (9), arc-shaped printed dipoles (10), L-shaped feed baluns (11), the parasitic units (12), the directors (13), a coaxial line (14), 100 ohm microstrip lines (15) and a small metal wafer (16).

A high speed video cable carries signals according to the High-Definition Multimedia Interface (HDMI) or DisplayPort standards, and includes a raw cable and may include a boost device. The raw cable includes coaxial lines of a characteristic cable impedance higher than the impedance implied in the standards. The correct impedance is observed at the sending end by shunt resistors mounted in the first cable connector. The resultant loss of signal may be made up with the boost device mounted in the connector at the other end of the cable in the case of a long cable. Increasing the cable impedance reduces the inherent loss of the raw cable thus permitting the use of low cost material such as tinned wires. Similar advantages are obtained regardless whether Shielded Twisted Pairs (STP) or coaxial lines are used.

The invention discloses a mixed type underwater navigation detector which comprises a bow compartment, a main chamber, an electronic control chamber and a peak tank which are coaxially and sequentially connected, wherein the bow compartment and the peak tank are communicated with an outside water area; the main chamber and the electronic control chamber are sealing chambers; two wings are symmetrically installed at a connection position of the main chamber and the electronic control chamber; a sonar height gauge and an acoustic transceiver are installed in the bow compartment; a non-contact electric energy and signal transmission assembly is sleeved outside the main chamber; a gesture adjustment system and a buoyancy adjustment system are installed in the main chamber; the buoyancy adjustment system is installed on the front portion of the main chamber; buoyancy is adjusted through movement of a piston; two sides of the piston are isolated and sealed through rolling membranes; electronic equipment for controlling an aircraft is installed in the electronic control chamber; and a propeller propelling system and a steering control system are fixed on the peak tank. The mixed type underwater navigation detector has characteristics of underwater gliders and autonomous underwater vehicles, and can be abutted with an underwater connection platform to conduct non-contact charging and data transmission, so that continuous operational capability and applied range of underwater aircrafts can be increased.

The present invention relates to a double magnetic path structure of large-stroke electromagnetic vibration table. Said double magnetic path structure includes coaxially successively-connected first magnetic body, first central magnetic ring, central magnetic pole, second central magnetic ring and second magnetic body. Said first magnetic body and second magnetic body are respectively fixed in the outer shell interior, a cylindrical coil and an outer magnetic pole are coaxially cover-mounted on the exterior of central magnetic pole, and two ends of said outer magnetic pole are fastened with outer shell end port. Said invention also provides the working principle said double magnetic path structure and its concrete operation method.

A plasma generating apparatus has a plasma-generating vessel into which a gas is introduced. A coaxial line is inserted into the plasma-generating vessel. The coaxial line is insulated from the vessel with an insulator. The coaxial line has a central conductor and an outer conductor, to both of which microwave is supplied from a magnetron. That part of the central conductor which is located inside the plasma-generating vessel has, disposed therein, permanent magnets which form a cusp field. A seed plasma is formed around the permanent magnets by microwave discharge. A direct-current voltage is applied from a direct-voltage source between the outer conductor 24 and the plasma-generating vessel. Upon this application, electrons in the seed plasma move toward the inner wall of the plasma-generating vessel and are accelerated to ionize the gas. The ionized gas serves as seeds to cause arc discharge between the outer conductor and the plasma-generating vessel to generate a main plasma. By disposing an extracting electrode at the opening of the plasma-generating vessel, ion beams can be extracted from the main plasma.

A circularly polarized patch antenna uses a square quarter-wavelength conductive plate, spaced away from a slightly larger backing conductor. Excitation uses a coaxial feed stem pair, whereof respective inner conductors join the patch at orthogonal locations on a reference circle, and outer conductors intrude past points of joining to the backing conductor to establish gaps that interact with patch and backing conductor size and spacing to jointly establish terminal impedance. A parasitic element in the propagation path broadens bandwidth, while a frame behind serves to define a cavity reflector. A power divider behind the frame converts a single applied broadcast signal into two equal signals with orthogonal phase, which signals are delivered to the feed stems with equal-length coaxial lines.

A planar antenna including slot arrays configured to set a narrow interval between elements so as to perform beam scanning in a wide angle range while keeping low loss and low profile. The planar antenna includes: a coaxial line including an inner conductor, an outer conductor provided so as to surround a circumference of the inner conductor, and both ends short-circuited; a feeding mechanism for exciting the coaxial line; and a plurality of slots formed on the outer conductor with a certain angle with respect to a tube direction of the coaxial line and having approximately a resonance length.

The invention discloses a planar-broadband dual-polarization base station antenna and belongs to the field of mobile communication base station antennae. The planar-broadband dual-polarization base station antenna mainly solves the problems that an existing base station antenna is complex in structure and has difficulty in being integrated with other devices. The planar-broadband dual-polarization base station antenna comprises radiation oscillators (1), feed baluns (2), a baffle board (3), coaxial cables (4), supporting columns (5) and a dielectric material plate (6). The radiation oscillators (1) are dual-polarization planar oscillators at +/-45 degrees, and the feed baluns (2) are planar feed baluns at +/-45 degrees. The radiation oscillator at -45 degrees and the feed balun at +45 degrees are printed on the upper surface of the dielectric material plate (6), and the radiation oscillator at +45 degrees and the feed balun at -45 degrees are printed on the lower surface of the dielectric material plate (6). The dielectric material plate (6) is fixed to the square baffle board (3) through the supporting columns (5). According to the planar-broadband dual-polarization base station antenna, planarization of the radiation oscillators and the feed baluns are achieved, meanwhile, the structure of the baffle board is simplified, and a stable directional diagram characteristic can be obtained in broadband.

The invention specifically relates to a reduced graphene oxide and nano cerium oxide composite microwave absorbing material and a preparation method thereof. The method comprises the following steps: preparing graphene oxide by using an improved Hummers method; mixing a graphene oxide aqueous solution with cerium nitrate in a mass ratio of 1:25, and adjusting the pH value to 10; and by using a one-step hydrothermal method, simultaneously generating nano cerium oxide and reducing the graphene oxide, so that a reduced graphene oxide and nano cerium oxide composite microwave absorbing material is obtained. The microwave absorption parameters of the composite material are tested by using a vector network analyzer, and the microwave reflection loss of the composite material is calculated by using a classical coaxial line theory. Results show that the reduced graphene oxide and nano cerium oxide composite microwave absorbing material has excellent microwave absorbing properties, high absorption strength and wide absorption band, and compared with nano cerium oxide, the microwave absorbing properties are greatly improved. Thus, the reduced graphene oxide and nano cerium oxide composite microwave absorbing material disclosed by the invention has broad application prospects, and is of great significance to the expansion of industrial application of rare earth oxides and the national defense construction.

An elliptically polarized (EP) dielectric block antenna comprises a linearly polarized (LP) dielectric block antenna and a wave polarizer integrated with the LP dielectric block antenna. The wave polarizer converts the LP wave of the LP dielectric block antenna into an EP wave or a circularly polarized (CP) wave. The wave polarizer is directly integrated with the LP dielectric block antenna by fabricating inclined slots on faces of the dielectric block at an oblique angle to the LP wave direction of polarization. This provides a very compact EP or CP antenna with a broadside or omnidirectional radiation pattern. The EP or CP antenna is excited by an inner conductor of a SubMiniature version A (SMA) connector that can be directly connected to a coaxial line thereby providing a simple feed network for the antenna.

The invention provides a back-fed millimeter wave broadband double ridged horn antenna, belongs to the technical field of microwave and millimeter wave signal processing, and relates to a millimeter wave broadband horn antenna. The back-fed millimeter wave broadband double ridged horn antenna comprises a coaxial line excitation part, a ridge waveguide part and a double ridged horn part, wherein the coaxial line excitation part is formed by orderly connecting a coaxial line, a mode converting part and an impedance matching part; the mode converting part is formed by connecting a shielding panel line provided with a ridge and a coaxial line on the ridge side; the impedance matching part is stepped gradient double ridged waveguide; the ridge waveguide part is standard double ridged waveguide; and two ridges of the double ridged horn part are extended from two ridges of the ridge waveguide part to a mouth of a horn. The antenna adopts a back-fed structure, electromagnetic waves are fed in from the back of the ridge waveguide parallel to the ridge waveguide transmission direction, the coaxial line and the waveguide are positioned in the same axes, and a small voltage standing wave ratio can be obtained; and through mode conversion and impedance matching, the antenna can have satisfactory characteristics in a broadband range between 18 and 40GHz, and is characterized by wide frequency band, compact structure and good performance.

The invention discloses a point-to-multi-point two-way optical fiber coaxial mixed full-service broadband access system based on an IEEE802.3ah protocol and the technology thereof (i.e. an EPON + ECAN broadband access network system). The system seamlessly transplants an IEEE802.3ah EPON protocol and the technology thereof into a passive coaxial cable user distribution network from a passive optical network (EPON), so that 802.3ah passes through PON from the front end and is seamlessly transplanted to PCN (passive cable network) so as to realize the broadband access of P2MP. The system comprises the passive optical network (EPON) on the front end and a coaxial network system close to a user terminal, so that one optical fiber arrives at a building and one coaxial cable enters a household, so as to provide two-way data and broadcasting television services. The system comprises a coaxial line terminal CLT, a coaxial network unit CNU, an SNMP remote network management system for managing the communication between the CNU and the CLT and a method for realizing 20 to 100Mb/s broadband data access between the CLT and the CNU within the frequency band of 5 to 65MHz, and compositing and decomposing data signals and broadcasting television signals.

The invention, suitable for the field of mobile communication base station antenna, discloses a wideband double frequency mobile communication base station antenna, which comprises a low frequency radiation unit array, a high frequency radiation unit array, a low frequency feed network, a high frequency feed network and a reflection plate. The low frequency unit enhances bandwidth by introducing parasitic radiation patch. Tail ends of two pairs of radiation arms of the high frequency radiation unit are bent, the high frequency radiation unit array is nested in blank region remained by the lowfrequency radiation unit, and the radiation unit array is fixed axially to the reflection plate. The high and low frequency radiation units are etched on the same surface of medium base plate of antenna radiation body, and L-shaped coupled micro-strip feed lines are etched on the other surface of the medium base plate of the antenna radiation body. High and low frequency micro-strip power dividers disposed on the reflection plate are connected with the high and low frequency radiation units respectively through a coaxial line, each signal is input to the radiation unit corresponding to each array in uniform amplitude and constant phase way, and such symmetrical feed mechanism ensures that the antenna can obtain good directional diagram property.

The invention discloses a multi-frequency circularly polarized stacked micro-strip antenna, formed by stacking a plurality layers of metal sheets and medium plates arranged between every two metal sheets, wherein an inner conductor and an outer conductor which are coaxial are respectively connected with the upper layer of metal sheet and an earthing plate to feed electricity, and electromagnetic coupling between every two layers of metal sheets is used for feeding the electricity to the middle layer of metal sheet, thereby forming a plurality of circularly polarized micro-strip antennas; and parameters of the various layers of metal sheets and the medium plates are designed by the conventional design method of the micro-strip antenna, and various working frequencies of the antenna are relatively independent, so that combinations of any frequency points can be achieved; and radiation characteristics and resonance characteristics in the various frequency bands are respectively determined by the upper layer of metal sheet and the medium board on the corresponding positions. The multi-frequency circularly polarized stacked micro-strip antenna disclosed by the invention has the advantages of being simple and compact in structure, low in cost and easy in implementation; satellite signals in the various frequency bands can be received just by a single-port feed interface without a power divider, a coupler, a phase-shift network or other circuits, so that the emitting and receiving circuits are simple; and the multi-frequency circularly polarized stacked micro-strip antenna additionally has the advantages of small size, great beam width and the like.

The invention discloses an automatic spiral hole-milling unit comprising a cutter rotation system, a radial deflection system, a revolution system and a sleeve with an inner hole. The axis of the inner hole of the sleeve is eccentrically arranged relative to the axis of an outer circumference of the sleeve. A stand is connected outside the sleeve. The cutter rotation system comprises a drive unit with a cylindrical shell. The drive unit can be rotatably arranged inside the inner hole of the sleeve. An output shaft of the drive unit is connected with a clamping apparatus holding a cutter. The output shaft of the drive unit is in offset arrangement relative to the axis of the shell of the drive unit. The radial deflection system comprises a stepping motor with an electromagnetic brake. A flange of the stepping motor is fixedly connected with the sleeve, and an output shaft of the stepping motor is fixedly connected with the shell of the drive unit coaxially. The revolution system comprises an electric rotating motor; the inner ring of the electric rotating motor is fixedly connected on the sleeve, and the outer ring of the electric rotating motor is fixed on the frame. When used for processing of high-strength materials difficult to cut and process, the automatic spiral hole-milling unit obviously improves the processing efficiency and the processing quality.

The invention relates to a rocker type four-wheel robot comprising a main box body, a differential balancer, a left rocker, a right rocker and wheels, wherein the shell of the differential balancer is fixedly connected with the main box body of the rocker type four-wheel robot, and two projecting shafts of the differential balancer are respectively connected with the two rockers positioned at both sides of the man box body; two landing legs are connected with a connection joint at a certain included angle, and the tail ends of the landing legs are connected with conical gear tumblers; the landing legs are in a cylinder shape and internally provided with reducing motors, the reducing motors are connected with input bevel gears of the conical gear tumblers connected to the tail ends of the landing legs, and the wheels are connected with output shaft coaxial lines of the conical gear tumblers; the upper ends of the landing legs are provided with holes, a power supply of the reducing motors and control cables penetrate through the holes, and the control cables are introduced into the main box body of the rocker type four-wheel robot through a cable introducing device arranged on the main box body of the rocker type four-wheel robot. The rocker type four-wheel robot can be adapted to uneven terrains and can be used as a movable robot platform for outdoor search, environment detection and search and rescue after disasters.

The invention provides a feeding device which comprises a feeding trolley and a locking part. The trolley comprises a frame and a tray. The frame comprises a top plate, a screw rod and a nut. A hole is formed in the top plate. The nut is fixed to the position of the upper hole in the upper surface of the top plate through a bearing. The nut and the hole share the same coaxial line. The nut is arranged on the screw rod in a sleeving manner. The lower end of the screw rod penetrates the hole and extends out of the lower surface of the top plate. The upper end of the screw rod is fixed to the bottom of the tray. The feeding device has the beneficial effects of being simple in structure, convenient to use and practical.

An electronic direct reading counter of a meter comprises a plurality of number reading wheels and a plurality of carry coupling wheels installed on one side of the number reading wheels in parallel through a wheel shaft and corresponding to the number reading wheels. The electronic direct reading counter is characterized in that the plurality of number reading wheels are sectioned by the coaxial line and installed on a counter support at intervals, a permanent magnet and a magnetic shielding plate are respectively arranged on shaft core parts on two sides of each number reading wheel, a magnetic induction angle sensor corresponding to the coaxial line of the shaft core permanent magnet of the number reading wheel is respectively arranged between the number reading wheels, and the magnetic induction angle sensor is installed on an assembly circuit board of the magnetic induction angle sensor in welding mode. The electronic direct reading counter has the advantages of being capable of achieving 360-degree full-circle measurement of the number reading wheel and accurate and stable in reading. The measurement resolution rate depends on analog-to-digital conversion actual accuracy. The number wheel carries '0' when meeting '9', and number is read from low order to high order in carry. Enough referenced information is provided, repeated code and error code cannot happen, electronic components are reduced substantially, and product fault risk is greatly reduced.

A plasma processing apparatus includes a cathode 54 having a large diameter part 56 and a long thin small diameter part 58, and the upper end surface of the large diameter part 56 faces the plasma forming space 76. The substrate 66 which is to be processed is mounted on the upper end surface of the large diameter part 56. The lower end of the small diameter part 58 is connected via the matching circuit 60 to the high frequency power source 62. The transmission path within the chamber comprises a large diameter coaxial line, a small diameter coaxial line and a radial line which connects them. The large diameter coaxial line includes the large diameter part 56, the first side wall 42 and the insulator 70. The radial line includes the lower surface of the large diameter part 56, the upper surface of the bottom plate 46 and the gap 72 between them. The small diameter coaxial line includes the small diameter part 58, the second side wall 68 and the gap 74. Appropriate impedance matching is achieved between the two coaxial lines and the radial line.