377 results about "Cross slot" patented technology

A substrate integrated waveguide (SIW) slot full-array antenna fabricated employing printed circuit board technology. The SIW slot full-array antenna using either single or multi-layer structures greatly reduces the overall height and physical steering requirements of a mobile antenna when compared to a conventional metallic waveguide slot array antenna. The SIW slot full-array antenna is fabricated using a low-loss dielectric substrate with top and bottom metal plating. An array of radiating cross-slots is etched in to the top plating to produce circular polarization at a selected tilt-angle. Lines of spaced-apart, metal-lined vias form the sidewalls of the waveguides and feeding network. In multi-layer structures, the adjoining layers are coupled by transverse slots at the interface of the two layers.

A duplex polarization antenna includes a radiation array set on a reflection earth plate, four support conductors constituting two mutual vertical unbalanced transformers and supporting the radiation array on the reflection earth plate. The radiation array is formed by four equivalent conducting rings with symmetric lines and their heads and tails are connected, each forms a branch of the ring and a branch of a cross slot. The cross conductor has four symmetric lines, two of which belong to the conduction rings, the other two are the diagonal lines of cross conductors. The support conductors are connected to the diagonal lines of the earth plates and the cross conductors, the activated radiation array has two mutual vertical electromagnetic field owning vector E parallel to the diagonal.

The present invention discloses a method for suppressing cross-slot interference in a time-slotted CDMA system. The method includes: determining, by a base station, positions of cross slots according to configuration information of local cell and configuration information of co-frequency adjacent cells, and performing multi-cell channel estimation on the cross slots to obtain channel estimation results; determining, by the base station, code channel configuration information of the co-frequency adjacent cells, grouping the determined code channels and determining the code channels of the co-frequency adjacent cells involved in a joint detection; and performing, by the base station, the joint detection according to the multi-cell information estimation results and the determined code channels of the base stations involved in the joint detection to obtain detection data. With the present invention, interference from a base station transmitting downlink signals in cross slots to a base station receiving uplink signals in the corresponding slot may be reduced, and the system capacity and the stability may be improved.

A self-positioning and self-starting, tapered thread, orthodontic bone screw (25) for use in intra-oral corrections that serves as a craniomaxillofacial rigid post for orthodontic appliance fixation. The tip of the bone screw incorporates a defined sharp pin-point tack tip (2) to easily pierce the soft tissue and initially penetrate into the host bone for alignment and penetration. In series with the tack tip is a self-tapping, double, tapered thread (11) which allows an orthodontist to insert the bone screw post into the host bone in a single operation without the need for opening or flapping the surrounding soft tissue. As the bone screw penetrates the bone site, the tapered threads (24) allow for easy thread pick-up into the host bone while the increasing outer diameter of the thread (26) rigidly locks into the crestal bone. Once attached and fixated in the host bone, the distal cylindrical dome shaped driver head (12) acts as the fixation post for the anchorage of orthodontic appliances. Incorporated into the cylindrical dome shaped driver head are several attachment features including cross holes (13) and a snap-on undercut groove (19) for attaching orthodontic appliances either individually or simultaneously. The dome shaped head also incorporates a spline driver feature for easy pick-up, assembly and insertion of the screw with a corresponding spline driver tool (27) that allows the screw to be driven with either a standard square or cross slot driver feature.

A crossed slot fed microstrip antenna (100). The antenna (100) includes a conducting ground plane (125), which has at least one crossed slot (125), and at least two feed lines (105). The feed lines (105) have respective stub regions (115) that extend beyond the crossed slot (125) and transfer signal energy to or from the crossed slot (125). The antenna (100) also includes a first substrate (150) disposed between the ground plane (120) and the feed lines (105). The first substrate (150) includes a first region and at least a second region, the regions having different substrate properties. The first region is proximate to at least one of the feed lines (105).

The invention discloses a synchronization method of femtocell and macrocell. The method comprises the following steps: determining the propagation time delay TAB between femtocell and macrocell; calculating the difference of the guard period length of macrocell and the twice of the TAB, using the difference value as the guard period length of femtocell; and determining the TS0 initial position offemtocell to be the initial position postponement TAB relatively to the TS0 of macrocell, wherein a time slot which is the twice of TAB is between the uplink time slot and downlink time slot of femtocell. The invention also discloses an access method of the user equipment (UE). By using the synchronization method and access method of the invention, when the proportions of the uplink time slots and downlink time slots of femtocell and macrocell are the same respectively, the interference of cross slots can be avoided and the normal access of UE can be ensured.

The invention discloses a circularly polarized ceramic antenna based on coupling and feeding of a strip line via multiple slots, comprising an upper microstrip antenna radiator, an upper dielectric substrate, a medium dielectric substrate, a lower feed strip line and a coaxial feeder, wherein the lower feed strip line comprises a dielectric substrate layer, upper and lower metal floor layers attached to the upper and lower surfaces of the dielectric substrate and a metal feeder in the middle of the dielectric substrate layer; feed slots formed by three cross slots are arranged in the center of the upper metal floor of the strip line; the metal feeder couples and feeds the upper microstrip antenna structure via the slots; and the upper and lower metal floor layers of the strip line are connected by cylindrical via holes. The antenna adopts the feed slots formed by three cross slots to increase operation bandwidth and the 3dB circularly polarized axial ratio bandwidth, adopts the squarering dielectric substrate and the strip line for coupling and feeding to increase the gain, has the characteristics of miniaturization, band broadening and compact structure, and is convenient in processing and integration.

The antenna element comprises: an electrically conductive ground plane (2) on which two orthogonal symmetrically crossing slots (3) are formed; a radiating patch (1) supported in a spaced relationship on the one side of the said ground plane; conductive feeding tracks (4) supported on the other side of the said ground plane and electromagnetically coupled with the slots (3). One of the ends of each feeding track (4) is input / output port (5) of the antenna element and the other end is disposed after the slot (3), so as the feeding tracks (4) to cross the slots (3). A compensating capacitive element (6) couples the ends of the feeding tracks (4) laid after the slots (3).

Novel tools and techniques are provided for implementing FTTx, which might include Fiber-to-the-Home (“FTTH”), Fiber-to-the-Building (“FTTB”), Fiber-to-the-Premises (“FTTP”), and / or the like. In some embodiments, a method might include routing an F1 line(s) from a central office or DSLAM to a fiber distribution hub (“FDH”) located within a block or neighborhood of customer premises, via at least an apical conduit source slot. From the FDH, an F2 line(s) might be routed, via any combination of apical conduit main slot(s), cross slot(s), far-side slot(s), missile bore(s), bore hole(s), and / or conduit(s) (collectively, “Apical Conduit Components”), to a network access point (“NAP”) servicing one or more customer premises. An F3 line(s) might be distributed, at the NAP and from the F2 line(s), to a network interface device (“NID”) or optical network terminal (“ONT”) at each customer premises, via any combination of the Apical Conduit Components, which include channels in at least portions of roadways.

A crossed-slot antenna is fabricated using rectangular sheet of metal. A crossed-slot is etched or stamped in the sheet of metal. A feed structure is similarly formed in the sheet of metal. Sidewalls are integrally formed with the sheet of metal and are bent to form a rectangular box. A circuit board is attached to the rectangular box. An air-filled cavity is defined by the sheet of metal, the sidewalls, and the circuit board. Alternatively, a crossed-slot antenna with a solid cavity is fabricated using a sheet of plastic. Ridges are formed in a cross pattern on the sheet of plastic. The sheet of plastic is plated with metal. The metal is removed from a surface of the sheet of plastic, exposing the ridges.

The invention comprises a triform fitting 1, essentially made from non-metallic composite materials including several strengthening cross ribs 4 for joining symmetrical flanges 3 and a longitudinal flange 2. The symmetrical flanges3 include cross slots 8 for receiving the run-out 16 of the webs 11 of several T-shaped internal stringers 9 that form part of the torsion boxes 6. The feet 10 of the stringers 9 are joined along one of their faces to the skins 7 of the torsion boxes 6, while the end zones of the free faces of said feet 10 are placed against the outer face of the symmetrical flanges 3 of the triform fitting 1. This ensures that the symmetrical flanges 3 of the triform fitting 1 remain inside the torsion boxes 6. Alternatively, the fitting 1 may not include the cross slots 8.

The invention relates to a pneumatic combined plate type single seed precision seed metering device, which comprises a shell. A seed inlet, an air inlet, and a seeding port are formed on the shell, and a seed cleaning piece and a seed pushing piece are fixed in the shell; a seed plate is arranged in the shell and consists of a plate center, a rubber indent belt, and an outer ring which are sleeved; and holes are formed at the peripheries of the plate center, the rubber indent belt, and the outer ring at interval correspondingly. A circle of strip-shaped groove is formed on the inner side of the circumference of the plate center; the rubber indent belt is provided with a hemispherical indent; a cross slot is formed at the bottom of the indent; and a conical hole is formed on the outer ring so as to be naturally connected with the indent. The seed cleaning piece is close to the seed inlet and can slide in the plate center groove and cannot pass through the cross slot at the bottom of the rubber indent. The seed pushing piece is close to the seeding port and can slide in the plate center groove and pass through the cross slot at the bottom of the rubber indent; a seed brush is tangential to the outer ring of the seed plate; and a brush axle is parallel to a transmission shaft of the seed plate. The seed metering device is also provided with a seed blocking piece and a seed protection rubber piece. The pneumatic combined plate type single seed precision seed metering device effectively guarantees the links of filling seeds, cleaning the seeds, protecting the seeds and discharging the seeds, and realizes precision seeding.

An antenna apparatus and method includes an orthogonal slot antenna which overcomes the limitations associated with RF choke between the adjacent slots through various feed techniques. A cavity backed cross-slot antenna includes a horizontal slot antenna, a vertical slot antenna sharing a center portion with the horizontal slot antenna, a first feed for the horizontal slot antenna, and a second feed for the vertical slot antenna, the first feed and the second feed provided to the shared center portion. Another cavity backed cross-slot antenna includes a horizontal slot antenna, a vertical slot antenna, the horizontal slot antenna and the vertical slot antenna share a center portion therebetween, a first feed feeding both halves of the horizontal slot antenna, and a second feed feeding both halves of the vertical slot antenna.

An end effector has one or more vortex chucks to support a wafer, and at least two detectors for detecting different portions of the wafer before the wafer is picked up. If one of the detectors detects a wafer and the other one does not, an alarm is generated to alert an operator that the wafer is possibly cross slotted in the wafer cassette. Each detector includes a light emitter and a light receiver. The light emitter emits a light beam at an angle to a surface defined by an ideally flat wafer when the wafer is supported by the end effector (the actual wafers do not have to be flat). The angle is not more than 45°, and is between 6° and 12° in some embodiments. Other features and embodiments are also provided.

The invention provides a circularly polarized F-P resonant cavity antenna with high gain and low RCS, and aims to simplify the structure of the antenna and reduce the manufacturing cost of the antenna. The antenna comprises an upper dielectric plate and a lower dielectric plate, a wave-absorbing surface is printed on the upper surface of the upper dielectric plate, a partial reflection surface isprinted on the lower surface, the wave-absorbing surface comprises N*N wave-absorbing units arranged in a periodic manner, the wave-absorbing units adopt annular patch structures, four edges of the wave-absorbing units are provided with gaps, resistances are loaded on the gaps, the partial reflection surface comprises N*N partial reflection surface units arranged in a periodic manner, the partialreflection surface units adopt square patch structures, the center of each partial reflection surface unit is provided with a cross slot with different length and width, four edges of the partial reflection surface unit are provided with rectangular grooves, a rectangular metal patch is printed on the upper surface of the lower dielectric plate, a floor is printed on the lower surface, the rectangular metal patch and the floor are connected through a coaxial line, and a high-impedance surface formed by an area array formed by periodic arrangement of a plurality of strip-shaped metal patches isprinted around the rectangular patch.

The invention discloses a high-gain dual-frequency circularly polarized antenna based on a metasurface. The working frequency bands are a K wave band and a Ka wave band. A metal layer of the antenna comprises a micro-strip ring feeder line, a grounding plane with a cross slot and a metasurface. The micro-strip ring feeder line at the lowest position is coupled with the slotted grounding plane at the middle position. The electromagnetic wave energy is coupled to the metasurface of the uppermost layer and is radiated out. The sequential rotation structure of the micro-strip ring feeder line cangenerate a phase difference of 90 degrees so as to excite circular polarization. According to the feed structure, a wide axial ratio bandwidth can be realized; the metasurface can influence the axialratio bandwidth and gain of high and low frequency bands; the gain of the antenna in two frequency bands is greater than 5dBic; and the single-port feed dual-frequency circularly polarized antenna hasgood radiation characteristics in two frequency band bands, and is compact in structure and easy to process, so that antenna has a good application prospect in a wireless communication system.

The invention provides a wideband wide beam circular polarization medium resonator antenna suitable to X wave band, and belongs to the field of antennas. The antenna includes a medium substrate of which the right side is covered with a layer of metal surface mount device, a rectangular medium resonator which is arranged on the metal surface mount device, and an L-shaped feed microstrip antenna which is arranged on the back side of the medium substrate. The 4 corners of the bottom part of the rectangular medium resonator are dug out 4 same dimension rectangular medium blocks, and cross-slot-coupled the L-shaped microstrip antenna feed are adopted, so that the features of the wideband of the antenna area realized. The antenna is advantaged by wide frequency band, low profile, easiness to process, high stability of directional diagram within the working frequency band and wide wave beam width.

This invention discloses a method and a device for using cross slot resources in the time division duplex CDMA system conditions for using cross slots, assigning cross slot resources for users according to the designed conditions of using cross slots when a user applies for cut-in monitoring the cut-in user status in the cross slot to regulate and maintain the cross slot resources assigned to users. The device for realizing the said method is composed of a designing device, a storage device, a monitor device and a cross-slot distribution device.

The invention provides a microstrip reflective array unit loaded with a cross slot on the ground. The microstrip reflective array unit comprises a patch, a low-dielectric constant dielectric substrate, a high-dielectric constant dielectric substrate, a floor loaded with a cross slot, a foam layer and a floor, wherein the floor loaded with the cross slot is a metal flat plate opened with the cross slot at the middle, the foam layer is a honeycomb flat plate made of foam material or paper, and all adjacent layers are in close contact. Further, the invention also provides a microstrip reflective antenna. The antenna comprises a feeding source and a microstrip reflective array, wherein the feeding source is a pyramidal horn antenna, the microstrip reflective array comprises a plurality of microstrip reflective array units loaded with the cross slots on the ground, which are transversely, longitudinally and uniformly arranged. The unit loaded with the cross slot, provided by the invention, can work in two polarization directions perpendicular to each other, and different polarizations are completely independent to one another. The reflective array antenna has the performance of line-polarized wave conversion.

The invention provides an uplink and downlink slot time resource configuration method based on interference perception in a TDD system, which is applied to a communication network comprising a source base station, a target base station, as well as a user terminal in the source base station and a user terminal in the target base station, and the method comprises: judging whether the base station-to-base station interference is larger than a preset threshold value or not, if yes, canceling the uplink and downlink slot time resource configuration, and if no, continuously executing the next step; judging whether the interference measurement of the target base station on the user terminal in the source base station is larger than a preset threshold value or not, if no, executing the uplink and downlink slot time resource configuration, and if yes, executing the next step; judging whether the interference measurement of the source base station on the user terminal in the target base station is larger than a preset threshold value or not, if yes, canceling the uplink and downlink slot time resource configuration, and if no, executing the uplink and downlink slot time resource configuration. By the information interaction between the base stations, the flexible configuration of uplink and downlink slot time resources is realized, and the crossing slot time interference problem brought by the flexible configuration of the uplink and downlink slot time resources in different network structures is solved.

The screw bolt with nuts in the two end include screw bolt end plane, head nut, inward concave hidden nut, screw bolt, nut, spanner, inner hexagon spanner and Philips driver. The screw bolt has two nuts in its two ends, and its tail end has inward concave hidden nut without affecting the use of the thread on the screw bolt. The inward concave hidden nut may be in the shape of inward concave hexagonal slot or crossed slot for matching the inner hexagon spanner and the Philips driver separately. The present invention makes it possible to complete the screw-in and screw-out job in one work plane only.

The invention discloses a portable detection device for detecting a sighting line zero position of an infrared sniperscope, and belongs to the technical field of infrared optics detection. The conventional detection device is not a shaped special instrument. The detection device provided by the invention is characterized in that: a sealed hood is fastened on a base; a black body, a round disc target, a planar reflector and an off-axis parabolic mirror are fixed on the base and positioned in the sealed hood; a buckling base is fixed on the base and positioned out of the sealed hood. An infrared window is formed on the lateral wall of the sealed hood and opposite to the buckling base; a cross slot hole and a plurality of different round holes are formed on the round disc target; and the centre of the cross slot hole and the centers of a plurality of round holes are positioned on the same circle of the round disc target. The off-axis parabolic mirror, the infrared window and the buckling base are sequentially arranged by taking the axis of parallel light reflected by a reflector on the off-axis parabolic mirror as an axis. The black body, the centre of the cross slot hole or the center of one of the plurality of round holes and the planar reflector are coaxially arranged on one side of the axis of the reflector on the off-axis parabolic mirror as an axis sequentially.

The invention provides a noise-damping friction pad system, and the use of such a system in disc brakes, where the coefficient of friction of the outer friction pad differs by at least 2% from the coefficient of friction of the inner friction pad to reduce brake squeal noise. The inner friction pad and outer friction pad may each comprise at least one cross slot though the surface of each pad that is not in contact with the backing plates to further reduce brake squeal noise. The friction pads may be made of a ceramic composition a lomet composition, or one friction pad may be made of a ceramic composition and the other friction pad made of a lomet composition.

A boot for constant-velocity universal joint comprises a major-diameter cylindrical portion 2, a minor-diameter cylindrical portion 3 being separated away from and being put in place concentrically with the major-diameter cylinder portion 2, and having a smaller diameter than that of the major-diameter cylindrical portion 2, and an intermediate portion 10 connecting the major-diameter cylindrical portion 2 with the minor-diameter cylindrical portion 3. The intermediate portion 10 comprises a stretchable bellows portion 19 being connected with the minor-diameter cylindrical portion 3 integrally, and a rigidity-producing portion 11 being connected with the bellows portion 19 and the major-diameter cylindrical portion 2 integrally. The rigidity-producing portion 11 enlarges diametrically from the bellows portion 19 toward the major-diameter cylindrical portion 2, and additionally at least an outer peripheral surface 101 of the rigidity-producing portion 11 has a plurality of shoulders 61 in a stepwise manner. By means of the rigidity-producing portion 11, the rigidity at around the major-diameter cylindrical portion is enhanced, and thereby it is possible to suppress deformation at the time of assembling.

The invention discloses a method for realizing butt joint of steel pipes by the aid of an axial cross plug board and a butt joint part. Two end of the cross plug board is embedded into steel pipe axial cross recesses at butt joint ends of the two steel pipes, the other ends, which are not embedded into respective the steel pipe axial cross recesses of the two steel pipes, of the cross plug boards are integrally in butt joint with angle steel, or at least one intermediate steel pipe is further serially connected between the butt joint ends of the two steel pipes. The two steel pipes are connected rigidly in a cross plug board butt joint mode, various internal force including axial force, bending moment, shearing force, torque and the like can be effectively transmitted, construction is carried out conveniently and safely, the steel pipes can be connected by bolts without welding an a field installation process, construction installation is carried out conveniently, the connection quality does not rely on the technical level of welding workers, fire hazards can be avoided due to a non-welding working mode, the method is wide in application range, multiple steel pipes in the same type can be axially connected in the cross plug board butt joint mode, and different types of steel pipes with different outer diameters, different section shapes, different wall thickness and the like also can be axially connected in the plug board butt joint mode.

The invention relates to the technical field of biological culture equipment and particularly relates to a work fixture for batch ordered transfer of culture vessels. The work fixture comprises a shell; a shell cover matched with the shell is fixedly arranged on the shell by a cross recessed countersunk head screw; a cam shaft is penetrated into the axis of the shell and the shell cover; a guide pipe is penetrated along the axis of the cam shaft; the guide pipe is connected with the lower part of the cam shaft by a second spring; the top of the guide pipe is provided with a connector; a sliding chute is formed between the shell cover and each side of the shell; each of the sliding chutes is internally provided with a strip-shaped sliding block; a connecting groove is formed in the end, corresponding to the axis of the shell, of each of the sliding blocks; a deep groove ball bearing is fixedly arranged in each of the connecting grooves by a pin shaft; the ends, far away from the connecting grooves, of the sliding blocks are provided with clamping jaws extending to the outer part after passing through clamping grooves; and the sides, located at the axis of the shell, of the clamping grooves are provided with guide posts. The work fixture is compact in structure, long in service life, small in dimension and capable of greatly increasing the transfer efficiency of the culture vessels and reducing the labor intensity.

The invention discloses a shredding box for a kitchen, which comprises a box body, a first row of knives, a second row of knives and an anvil block. Blocky vegetables are put in the box body and are slightly positioned by the anvil block; the first row of knives move downwards, and first knife edges pass through gate slots to cut the vegetables into pieces; under the situation of keeping the first row of knives immobile, the second row of knives are rotated to be vertical; the second row of knives move downwards, and second knife edges pass through the grate slots and cross slots to cut the pieces into filaments. The shredding box disclosed by the invention is convenient and quick and simple in structure; the knife edges are inside the box body, so that the safety of a user is ensured; meanwhile, the shredding effect is obvious, so that everyone can become a chef.