32results about How to "Reduce profile height" patented technology

In a method for designing a multi-step tension prestressed girder, prestress is appropriately introduced with respect to a relationship between a load and stress, for each step of construction, so that the height of a profile of the girder can be reduced. In a method for fabricating a multi-step tension prestressed girder, prestress is appropriately introduced with respect to a relationship between a load and stress, for each step of construction, so that the height of a profile of the girder can be reduced.

A connector includes a first connector provided with a first insulating member and a first contact, and a second connector provided with a second insulating member and a second contact which is electrically connected with the first contact by fitting the first and second insulating members together. A fitting projection is provided in one of the first and second insulating members so as to project toward the other of the first and second insulating members. A fitting recess, into which the fitting projection is fitted when the first and second insulating members are fitted, is provided in the other of the first and second insulating members. The fitting projection includes an engaging recess which extends entirely across the fitting projection in one direction. The fitting recess includes an engaging projection which is engaged with the engaging recess when the first and second insulating members are fitted together.

A low-sidelobe plate array antenna includes a radiation layer and a feed layer. The radiation layer is superimposed on the feed layer and includes a first plate and a radiation array disposed on the first plate. The radiation array is formed by n2 radiation units which are distributed in 2(k-1) rows and 2(k-1) columns. Each radiation unit in the radiation layer is constituted by two first radiation assemblies and two second radiation assemblies. Each first radiation assembly comprises a first rectangular bar, a first rectangular cavity, a second rectangular cavity and a third rectangular cavity. The first rectangular cavity, the second rectangular cavity and the third rectangular cavity in the first radiation assembly are stacked in presence of an azimuth deviation to form a three-layer coupled structure, and the first rectangular bar located in the first rectangular cavity can better restrain cross polarization and reduce the sidelobe.

An airfoil blade (2) of a bearingless rotor of a helicopter. Said airfoil blade (2) has a pitch axis from a tip end to a root end and said root end is provided with junction means for a separable junction arrangement of said airfoil blade (2) with a flexbeam head (13), and a control cuff (4, 22). Said junction arrangement is mechanical with removable fasteners respectively removable connecting said root end of said airfoil blade (2) to said control cuff (4, 22) and said flexbeam head (13). Said root end comprises at least two openings (7, 8) being asymmetric with regard to said pitch axis.

The invention discloses a side punching die. The side punching die comprises an upper die panel, a transfer panel, a driving block, a side punching male die, a guide panel, a pressure panel, an insert, a lower die panel, a lower die insert and a cushion block, wherein the transfer panel is fixed to the bottom of the upper die panel; the upper end of the driving block is fixed to the transfer panel, and the lower end of the driving block is a bevel; the side punching male die is fixed to the bevel; the side punching male die can be driven by the driving block to punch holes in workpieces; the guide panel comprises a top panel and an inclined panel; the top panel is fixed to the transfer panel, the inclined panel is provided with a guide hole, and the guide hole is matched with the side punching male die; the pressure panel is fixed to the transfer panel; the insert is fixed to one side of the pressure panel and matched with the inclined panel; and the lower die insert is fixed to the lower die panel; the cushion block is fixed to the lower die insert and used for limiting the guide panel. The side punching die provided by the invention is used for side punching on punched panels, guiding is conducted by arranging the guide panel on the transfer panel, and the side punching die is driven through the driving block to complete side punching on the panels. Compared with the prior art, the occupied space is obviously reduced, and the development cost and storage space of the die are reduced.

The invention provides a dual-polarized ceiling antenna which comprises a reflecting plate, at least three horizontally-polarized antenna radiating elements which are uniformly distributed around the periphery of the upper surface of the reflecting plate, a vertically-polarized antenna radiating element which is arranged in the center of the upper surface of the reflecting plate, a horizontally-polarized antenna power division network used for enabling the horizontally-polarized antenna radiating elements to carry out in-phase consistent feeding, a first feeder and a second feeder, wherein the horizontally-polarized antenna power division network is arranged on the lower surface of the reflecting plate, each horizontally-polarized antenna radiating element is electrically connected with the horizontally-polarized antenna power division network, the first feeder is electrically connected with the horizontally-polarized antenna power division network, and the second feeder is electrically connected with the vertically-polarized antenna radiating element. The dual-polarized ceiling antenna has the advantages of high radiant gain, uniform signals, reasonable directionality, high isolation and the like; and meanwhile, the height of an antenna outline can be reduced.

An electronic circuit module includes a circuit board, electronic components, a burying layer, and a conductive film. The circuit board includes a first principal surface on which first electrodes are provided, a second principal surface on which second electrodes including grounding electrodes are provided, and a side surface connecting the first principal surface and the second principal surface. The electronic components are connected to the first electrodes. The burying layer is provided on the first principal surface of the circuit board with the electronic components buried therein. The conductive film is connected to the grounding electrodes. The outer surface of the burying layer includes markings with protruding shapes with respect to the outer surface of the burying layer. The conductive film covers the outer surface of the burying layer.

The invention relates to a digital phased array antenna with multi-bit quantization, comprising a plurality of antenna sub-arrays arranged in a matrix, and a plurality of feed structure layers arranged under the antenna sub-array, each of the feed structure layers To feed multiple adjacent antenna sub-arrays, each antenna sub-array only receives the feed from one feed structure layer, and the antenna sub-arrays include 180° phase shift unit layers from top to bottom, 90° phase shift The unit layer and the 45° phase shift unit layer, the 180° phase shift unit layer and the 90° phase shift unit layer, the 90° phase shift unit layer and the 45° phase shift unit layer are sequentially connected through respective metal via structures. The present invention integrates three switch phase shifters (the radiation layer can also realize the phase shift function at the same time) by stacking up and down and cascading, which not only realizes the phase control of 3-bit quantized numbers, but also effectively reduces the cascading loss.

The invention relates to a coupled feeding inverted F antenna which comprises a bottom plate, an insulating cover and an antenna body. The antenna body is sealed and packed on the bottom plate through the insulating cover. The antenna body comprises a left radiating body and a right radiating body, wherein the left radiating body and the right radiating body are oppositely and symmetrically arranged. The outer lateral edge of a left radiator is supported by the bottom plate in an insulating mode, a coupled feeding piece supported by a feeding rod is arranged under the middle of the left radiator, the coupled feeding piece and the left radiator are arranged and coupled in parallel, the feeding rod is connected with a feeding opening under the bottom plate, and the inner lateral edge of the left radiator is supported by the bottom plate through a ground connection column and penetrates through the bottom plate to be outwards connected with the ground. The outer lateral edge of a right radiator is supported by the bottom plate in an insulating mode, a coupled ground connection piece supported by a ground connection rod is arranged under the middle of the right radiator, the coupled ground connection piece and the right radiating body are coupled and arranged in parallel, the ground connection rod is connected with a ground connection opening under the bottom plate, and the inner lateral edge of the right radiator is supported by the floor through the ground connection column.

The invention provides an antenna element having a feed unit, a first radiation unit and a second radiation unit, wherein the feed unit includes two differential feed circuits and four grounding ends. Each differential feed circuit includes an input end and two output ends. The first radiation unit includes a first radiation body. The second radiation unit includes four second radiation bodies and four grounding elements. According to the antenna element provided by the invention, through feeding of the first radiation body and the second radiation bodies in a coupled feeding manner, the number of solder joints can be reduced; and through arrangement of the second radiation bodies extending in a serpentine form, the profile height of the antenna element can be reduced and the requirements of customers on miniaturization of a base station are met.

A lateral spine implant has a lateral spine cage and an associated lateral spine plate with one or more folding vertebral attachment arms, each arm configured for attachment to vertebral bone, The ability of the one or more arms to fold allows the lateral spine plate to be inserted / implanted at a lower profile height than traditional lateral spine plates. The lateral spine plate is meant to be used at times of intended or unintended compromise of the anterior longitudinal ligament (ALL) to prevent interbody cage migration, but may be adapted for any lateral plating application. Once expanded, each attachment arm is configured to receive a bone screw for securing the attachment arm to a vertebra, the bone screw retained by rotating cam lock nuts of the attachment arm.