Abstract: The present invention relates to linkers having a group of propiolyl, substituted acryl (acryloyl), or disubstituted propanoyl, and using such linkers for the conjugation of compounds, in particular, cytotoxic agents to a cell-binding molecule.

Abstract: The embodiments of the present disclosure disclose a low-frequency oscillator unit and an antenna. The low-frequency oscillator unit comprises multiple oscillator arms extending outward along the central axis of the low-frequency oscillator unit and spaced apart from each other. The oscillator arm include a dielectric substrate and a conductive layer provided on the dielectric substrate. The conductive layer includes multiple spiral shaped first conductor parts and multiple second conductor parts arranged along the extension direction of the oscillator arm. Adjacent first conductor parts are connected by two spaced second conductor parts, and adjacent first conductor parts are symmetrically arranged.

Abstract: A base station antenna including a substrate, a plurality of oscillators, a control assembly, and a dielectric plate is provided. The substrate includes a first surface and a second surface disposed opposite to the first surface. The plurality of oscillators are disposed on the first surface of the substrate. The control assembly is disposed on the second surface of the substrate and electrically connected to the plurality of oscillators. The dielectric plate is disposed corresponding to the first surface of the substrate, and the plurality of oscillators are disposed between the first surface and the dielectric plate. Through the above arrangement, the base station antenna can have lower construction cost and debugging labor cost, and can eliminate influences of an antenna cover on antenna radiation performance at the same time.

Abstract: An oscillator antenna unit and an antenna are disclosed. The oscillator antenna comprises a plurality of oscillator arms and a guiding sheet. The plurality of oscillator arms extend outwards along a middle axle of the oscillator antenna unit and are arranged at an interval from one another. Extension directions of the oscillator arms form a first plane, and the guiding sheet parallel to the first plane is arranged above the oscillator arms and has a predetermined interval therewith. The antenna comprises at least two oscillator antenna units arranged in an array. Therefore, the technical solution of the embodiment of the present disclosure may improve the isolation and achieve a better decoupling effect.

Abstract: Disclosed is a feed network, which includes a printed circuit board, two microstrip power dividers and two microstrip combiners, and the two microstrip power dividers and two microstrip combiners arranged on the printed circuit board. A microstrip structure of each microstrip power divider is configured to realize impedance matching. Input ends of the two microstrip power divider are configured as two input ends of the feed network, two input ends of each microstrip combiner are respectively connected to one output end of each microstrip power divider, and output ends of the two microstrip combiners are configured as two output ends of the feed network, so that a multiple-input multiple-output feed network is realized. Therefore, when the feed network is applied to a base station antenna, all the radiation units are arranged in a linear matrix to achieve the effect of miniaturization of the base station antenna.

Abstract: The present disclosure discloses a phase shifter including a circuit board, a substrate, and a plurality of cables. Each of the plurality of cables includes a first insulation layer, an outer conductive layer and an inner conductive layer. The outer conductive layer is surrounded by the first insulation layer. The inner conductive layer is spaced apart from the outer conductive layer. The circuit board is electrically connected to the inner conductive layer of each of the plurality of cables. The substrate includes a plurality of tubes for ground, and the circuit board is disposed on the substrate. At least a part of each of the plurality of cables passes through at least one of the plurality of tubes, and the first insulation layer of each of the plurality of cables is positioned between the outer conductive layer and the corresponding tube and forms electrical coupling between the outer conductive layer and the corresponding tube.

Abstract: A use of one or more lipid compounds in the delivery of nucleic acids, and a lipid nucleic acid mixture, pharmaceutical composition or kit comprising the lipid compounds and nucleic acids. The lipid compounds provided above can promote the absorption, particularly oral absorption, of nucleic acids, and promote the entry of nucleic acids into target sites in a subject in need thereof.

Abstract: The embodiments of the present disclosure disclose a low-frequency vibrator unit, an antenna component, and a base station. A vibrator arm is provided to bend towards the bottom, and a director is provided with a window corresponding to an extension branch. Therefore, in an aspect, the vibrator arm occupies less space, such that more low-frequency vibrator units may be arranged in the same space. In another aspect, the window provided in the director reduces influences thereof on a high-frequency vibrator unit below and improves a cross-polarization ratio of the antenna component, such that signal space directivity of the antenna component is stronger. In yet another aspect, the antenna component occupies less space in the base station.

Abstract: The embodiment of the present disclosure provides a vibrator antenna unit and an antenna, wherein the vibrator antenna unit includes a support base, vibrator arms and a leading member arranged on the support base. The vibrator arms extend outward from the center axis of the vibrator antenna unit and are spaced apart from each other. Each vibrator arm includes a conductive layer and a solder resist layer, and the conductive layer is hollowed out to form multiple filtering branches. The leading member is located at the top of the vibrator antenna unit and has a space with multiple vibrator arms. Therefore, the vibrator antenna unit may improve isolation and achieve better decoupling effect through the vibrator arms with the filtering branches in conjunction with the leading member.

Abstract: The present disclosure provides a phase shifting device and a base station antenna. The phase shifting device comprises a driving module, a transmission rack plate, and a plurality of annular phase shifters. The driving module comprises a transmission rod. The transmission rack plate comprises a transmission nut, through which the transmission rack plate is pivotally connected to the transmission rod of the driving module. The plurality of annular phase shifters are disposed on the periphery of the transmission rack plate at intervals and are respectively engaged with the transmission rack plate. The rotation of the transmission rod drives the transmission nut to move back and forth on the transmission rod, and along with the back and forth movement of the transmission nut, the transmission rack plate drives the plurality of annular phase shifters to rotate.

Abstract: Disclosed is a base station antenna, which includes a substrate and an antenna sub-array. The antenna sub-array includes a feeding plate, a plurality of radiation units, and two metal baffles. The feeding plate is disposed on the substrate. The plurality of radiation units are disposed on the feeding plate along a first direction and electrically connected to the feeding plate. The two metal baffles are respectively disposed on two sides of the feeding plate along a second direction perpendicular to the first direction, and each metal baffle extends along the first direction. Each metal baffle is provided with an opening slot, and the length of the opening slot along the first direction corresponds to a wavelength of a center frequency of the base station antenna. Therefore, the base station antenna can achieve the technical effects of converging the horizontal beam width and optimizing the cross polarization ratio.

Abstract: An actuator includes a drive mechanism, a shift mechanism, a screw rod mechanism and a base. The drive mechanism includes a first output shaft and a second output shaft. The shift mechanism includes a gear bracket and a first transmission gear. The first transmission gear has a rotation center extending in a first direction. The screw rod mechanism includes a number of screw assemblies, and each screw assembly includes a push rod. The second output shaft is configured to be able to drive the gear bracket to move along a second direction, so that the first transmission gear is able to mate with different screw rod assemblies. The first output shaft is configured to be able to drive the first transmission gear to rotate around its own rotation center, and then drive the screw assembly to move, so as to move the push rod.

Abstract: The present disclosure provides a low band dipole and a multi-band multi-port antenna arrangement, wherein the low band dipole has four dipole arms, and the four dipole arms are horizontally and mutually perpendicularly placed in a “+” shape and adjacent two mutually perpendicular dipole arms are fed therebetween. The antenna arrangement includes a main reflector, at least one column of low band dipole array disposed on the main reflector, and at least one column of high band dipole array adjacent to the at least one column of the low band dipole array, wherein at least one low band dipole in each column of the at least one column of low band dipole array satisfies the following condition: the low band dipole has four dipole arms, and the four dipole arms are horizontally and mutually perpendicularly placed in a “+” shape, and adjacent two mutually perpendicular dipole arms are fed therebetween to form a +/?45 degree polarization.

Abstract: A dipole antenna unit and a base station antenna are disclosed. The dipole antenna unit includes two support plates, each support plate being provided with a first copper-clad region, the first copper-clad region including a balun and a first dipole arm connected to the balun, and a second dipole arm coupled to the first dipole arm in a non-contact manner is further arranged. Therefore, the dipole antenna unit and the base station antenna using the same according to the embodiments of the present disclosure have high hetero-polarization isolation and a high cross polarization ratio, an intermodulation index is improved, a structure is stable and reliable, and reduction of an overall size of the dipole antenna unit and the base station antenna is facilitated.

Abstract: The present disclosure provides a low band dipole and a multi-band multi-port antenna arrangement, wherein the low band dipole has four dipole arms, and the four dipole arms are horizontally and mutually perpendicularly placed in a “+” shape and adjacent two mutually perpendicular dipole arms are fed therebetween. The antenna arrangement includes a main reflector, at least one column of low band dipole array disposed on the main reflector, and at least one column of high band dipole array adjacent to the at least one column of the low band dipole array, wherein at least one low band dipole in each column of the at least one column of low band dipole array satisfies the following condition: the low band dipole has four dipole arms, and the four dipole arms are horizontally and mutually perpendicularly placed in a “+” shape, and adjacent two mutually perpendicular dipole arms are fed therebetween to form a +/?45 degree polarization.

Abstract: The embodiments of the present disclosure disclose a low-frequency vibrator unit, an antenna component, and a base station. A vibrator arm is provided to bend towards the bottom, and a director is provided with a window corresponding to an extension branch. Therefore, in an aspect, the vibrator arm occupies less space, such that more low-frequency vibrator units may be arranged in the same space. In another aspect, the window provided in the director reduces influences thereof on a high-frequency vibrator unit below and improves a cross-polarization ratio of the antenna component, such that signal space directivity of the antenna component is stronger. In yet another aspect, the antenna component occupies less space in the base station.

Abstract: The embodiments of the present disclosure disclose a vibrator arm and a vibrator structure. The vibrator arm comprises an extension branch and a bending branch, and the bending branch bends to one side of the extension direction of the extension branch. Thus, the space occupation of the vibrator arm is reduced, especially when the number of the vibrator arm is large, the antenna formed through the vibrator arm is smaller and the structure is more compact.

Abstract: The embodiments of the present disclosure provide an antenna vibrator and an antenna, and the antenna vibrator includes a radiation board. A center region of the radiation board is provided with a plurality of slits, and the radiation board is bent downwards at a peripheral region of each slit to form a support portion and a hollowed-out hole. The support portion serves to support and connect. At the same time, by forming the slit on the radiation board, the isolation of the vibrator is optimized, and the cross polarization ratio after the vibrator being arrayed may meet conventional index without adding a boundary condition.

Abstract: The embodiments of the present disclosure provide an antenna vibrator and an antenna, and the antenna vibrator includes a radiation board. The radiation board is a polygon, a part of the radiation board bends downward to form a plurality of support portions and a plurality of hollowed holes, and a plurality of corners of the radiation board bend downward to form a plurality of bending angle portions. The support portion serves to support and connect. At the same time, by forming the bending angle portion on the radiation board, isolation of the vibrator is optimized, and after the vibrator is arrayed, a cross-polarization ratio meets a conventional indicator in a case of not adding a boundary condition.

Abstract: The embodiments of the present disclosure provide an antenna vibrator and an antenna, and the antenna vibrator includes a radiation board. A partial region of the radiation board is bent downwards to form a plurality of support portions and a plurality of corresponding first hollowed-out holes, and a region between two adjacent first hollowed-out holes is bent downwards to form a plurality of bending portions and a plurality of corresponding second hollowed-out holes. The support portion serves to support and connect. At the same time, by forming the bending portion and the second hollowed-out hole on the radiation board, the isolation of the vibrator is optimized, and the cross polarization ratio after the vibrator being arrayed may meet conventional index without adding a boundary condition.