Abstract: A lithium ion secondary battery containing a positive electrode mixture layer, a separation membrane, and a negative electrode mixture layer, in this order, wherein the positive electrode mixture layer contains a positive electrode active material, a first lithium salt, and a first solvent, the negative electrode mixture layer contains a negative electrode active material, a second lithium salt, and a second solvent different from the first solvent, and the separation membrane contains at least one resin selected from the group consisting of a resin containing, as a monomer unit, at least one monomer having a (meth)acryloyl group, and a resin containing, as a monomer unit, at least one olefin containing fluorine.

Abstract: Provided are separator systems for electrochemical systems providing electronic, mechanical and chemical properties useful for a variety of applications including electrochemical storage and conversion. Embodiments provide structural, physical and electrostatic attributes useful for managing and controlling dendrite formation and for improving the cycle life and rate capability of electrochemical cells including silicon anode based batteries, air cathode based batteries, redox flow batteries, solid electrolyte based systems, fuel cells, flow batteries and semisolid batteries. Disclosed separators include multilayer, porous geometries supporting excellent ion transport properties, providing a barrier to prevent dendrite initiated mechanical failure, shorting or thermal runaway, or providing improved electrode conductivity and improved electric field uniformity.

Abstract: Disclosed is a separator including: a porous polymer substrate having a plurality of pores; and a porous coating layer disposed on at least one surface of the porous polymer substrate and including a plurality of core-shell type polymer particles, wherein the core-shell type polymer particles have a core portion including a super-absorbent polymer, and a shell portion surrounding the core portion and including a low-absorbent polymer having a melting point of 80° C. or higher. An electrochemical device including the separator is also disclosed.

Abstract: Presented are electrochemical devices with in-stack reference electrodes, methods for making/using such devices, and battery cells with stacked electrodes segregated by electrode separator assemblies including thermal barriers and built-in reference electrodes. An electrochemical device, such as a lithium-class secondary battery cell, includes an insulated and sealed housing with an ion-conducting electrolyte located inside the housing. A stack of working electrodes is also located inside the device housing, in electrochemical contact with the electrolyte. At least one electrode separator assembly is located inside the device housing, interposed between a neighboring pair of (anode and cathode) working electrodes. The electrode separator assembly includes a separator layer fabricated with an electrically insulating material that is sufficiently porous to transmit therethrough the ions of the electrolyte.

Abstract: A battery disclosed herein has a wound electrode body. A positive electrode has a positive electrode active material layer including a lithium-transition metal complex oxide as a positive electrode active material and a positive electrode binder. A length of the positive electrode active material layer in a width direction is 100 mm or larger. A negative electrode has a negative electrode active material layer containing graphite as a negative electrode active material. A separator has a base material layer, a heat-resistant layer opposing the positive electrode, and an adhesive layer opposing the negative electrode. A content of ceramic particles in the heat-resistant layer is 90 mass % or higher. A content of adhesive layer binder in the adhesive layer is 15 mass % or higher.

Abstract: A battery module includes a cell stack in which a plurality of battery cell assemblies are stacked; a busbar assembly electrically connected to the cell stack; and a cover assembly covering the busbar assembly, wherein at least one of the plurality of battery cell assemblies includes at least two battery cells opposing each other; and a support member supporting the at least two battery cells, and wherein the busbar assembly is coupled to the support member.

Abstract: A lithium-ion cell includes a housing comprising a metallic tubular housing part made of aluminum or an aluminum alloy with a terminal circular opening. The cell further includes a contact element that closes the terminal circular opening of the tubular housing part, the contact element comprising a metal disk, a contact sheet metal member, a metal pole pin and an insulator. In addition, the cell includes an electrode-separator assembly having an anode, a cathode, and a separator with the sequence anode/separator/cathode. The electrode-separator assembly is in the form of a cylindrical winding with two terminal end faces and a winding shell located therebetween. The electrode-separator assembly is disposed in the winding and is axially aligned so that the winding shell abuts an inside of the tubular housing part.

Abstract: An electrochemical device includes a housing, an electrode assembly, and a first electrode. The electrode assembly is accommodated in an accommodation cavity of the housing. The first electrode includes a first plug-in portion. The first plug-in portion extends away from the accommodation cavity and protrudes beyond an outer surface of the housing. The first plug-in portion is configured to be snap fitted to a first jack of an external device. The first plug-in portion is provided with a groove or an elastic bulge. The groove or the elastic bulge of the first plug-in portion is configured to be snap-fitted to a first elastic bulge disposed protrusively on an outer wall of the first jack or the first groove provided on an inner wall of the jack respectively.

Abstract: A battery pack includes a battery module in which a plurality of battery cells are mounted; and a discharge member electrically connected to the battery module, wherein the discharge member comprises a frame member having an open upper portion and containing a coolant, an upper cover for covering the upper portion of the frame member, and a resistor mounted in the frame member, and wherein both ends of the resistor are exposed to the outside of the discharge member, and are electrically connected to the battery module.

Abstract: Provided is technique to suppress inside short circuit of a battery. A herein disclosed battery includes an electrode body, a battery case, and a first electrical collector member. The electrode body includes a first electrode, a second electrode, and a first electrode tab group connected to the first electrode. The battery case includes an outer package and a sealing plate. The outer package is configured to accommodate the electrode body and includes an opening. The sealing plate is configured to seal the opening. The first electrical collector member is connected to the first electrode tab group. The first electrical collector member includes a first area that is arranged along a surface at the electrode body side of the sealing plate. A first insulating member is arranged between the sealing plate and the first area. A second insulating member is arranged between the first area and the electrode body.

Abstract: Arrangements for a frequency adjustable filter, which includes at least a housing, which includes one or more cavities closed by a lid above the housing are disclosed. In an arrangement, there is, per a cavity forming a resonator, a first resonator element extending from the lid, a second resonator element extending from the bottom, the second resonator element partially overlapping the first resonator element, an adjusting bar extending inside an area in which the first and the second resonator elements are overlapping, the adjusting bar being arranged to move within said area, a first hole either in the lid or in the bottom, a driving shaft, and an actuator arranged to move the adjusting bar through the first hole by means of the driving shaft. At least the first resonator element, the second resonator element and the adjusting bar are positioned to have a common vertical central axis.

Abstract: A method of forming a composite material for use as an isolator or circulator in a radiofrequency device comprises providing a low temperature fireable outer material, the low fireable outer material having a garnet or scheelite structure, inserting a high dielectric constant inner material having a dielectric constant above 30 within an aperture in the low temperature fireable outer material, and co-firing the lower temperature fireable outer material and the high dielectric constant inner material together at temperature between 650-900° C. to shrink the low temperature fireable outer material around an outer surface of the high dielectric constant inner material to form an integrated magnetic/dielectric assembly without the use of adhesive or glue.

Abstract: In a transmission line, a hollow portion overlaps a first ground conductor layer in an up-down direction. In a first orthogonal direction, the hollow portion includes a first portion extending in a second orthogonal direction of a signal conductor layer. In the first portion, a portion at which a width of the first portion in the second orthogonal direction has a first portion maximum width value is a first portion maximum width portion. A portion at which the width of the first portion in the second orthogonal direction has a first portion minimum width value is a first portion minimum width portion. A portion at which the width of the first portion in the second orthogonal direction has a first portion intermediate width value is a first portion intermediate width portion located between the first portion maximum width portion and the first portion minimum width portion in the front-back direction.

Abstract: Power-combining devices and, more particularly, antenna structures for spatial power-combining devices are disclosed. Spatial power-combining devices include amplifier assemblies with amplifiers and antenna structures supported by body structures. Body structures may include inner surfaces that are closer to a center axis of the spatial power-combining device where the inner surfaces have peripheral edges that are inset from remainders of the body structures. Antenna structures are disclosed that are arranged within inset portions such that the antenna structures are bounded on one end by the body structures. When assembled, a portion of a coaxial waveguide section that engages with the amplifier assemblies may bound opposing ends of the antenna structures. By not having body structures bound both ends of antenna structures, amplifier assembly design may be improved to allow smaller sizes for higher frequency operation along with improved manufacturability.

Abstract: An antenna device includes a housing, a masking frame, and antennas. The housing includes a side wall, a bottom wall, a heat dissipation structure, and bumps. The side wall surrounds the heat dissipation structure. The bottom wall connects to an edge of the side wall and extends outwards relative to the side wall. Each one of the bumps is disposed on one of the side wall and the bottom wall. The masking frame is removably fastened on the housing and defines an accommodation space with the side wall and the bottom wall. The antennas are disposed in the accommodation space and covered by the masking frame. The bumps contact the antennas, respectively.

Abstract: Disclosed is a radome structure for vehicle-mounted radar devices, in which a planar heating element 2 is laminated and fixed onto a substrate 1 of the radome, a local recess 3 is provided so as to protrude from the substrate 1, a connecting body 4 for electrically connecting an electrode of a heater wire 21 of the planar heating element 2 to a power supply line 5 to the planar heating element 2 is accommodated in the recess 3, and the recess 3 is filled with an insulating resin 6 so as to embed and seal the connecting body 4. It is possible to simplify a connection structure and a waterproof structure of a connecting portion for electrically connecting the heater wire and the power supply line of the radome, and reduce the manufacturing cost of the radome structure having a snow melting function.

Abstract: Disclosed is an electronic device including a first circuit board including a first surface facing a first direction and a second surface facing a second direction opposite to the first direction; a second circuit board including a third surface facing the first direction and a fourth surface facing the second direction; an interposer disposed between the first circuit board and the second circuit board; an antenna disposed at the first surface of the first circuit board; a first electronic component disposed on the second surface of the first circuit board and electrically connected with the antenna; and a thermal interface material (TIM) disposed between the second surface of the first circuit board and the third surface of the second circuit board and contacting a surface of the first electronic component.

Abstract: An antenna substrate according to the embodiment includes a substrate; an antenna pattern layer on the substrate; a first insulating layer including a resin and an inorganic filler on the substrate and the antenna pattern layer; and a second insulating layer including a resin and an inorganic filler on the first insulating layer, and wherein the second insulating layer has a higher dielectric constant and thickness than the first insulating layer.

Abstract: A display structure according to an embodiment may include: a cover glass forming an outer face of the display structure, a display panel disposed under the cover class, a first dielectric layer having a first periphery formed at least in part on an outer side of a periphery of the display panel, and disposed under the display panel, a second dielectric layer disposed on a first face of the first dielectric layer adjacent to the display panel, and a third dielectric layer disposed on a second face corresponding to the first face of the first dielectric layer. A second periphery of the second dielectric layer and a third periphery of the third dielectric layer, corresponding to the first periphery of the first dielectric layer, may be formed on an inner side of the first periphery. The first dielectric layer may have a first permittivity. The second dielectric layer and the third dielectric layer may each have a permittivity greater than the first permittivity.

Abstract: A radio frequency and electromagnetic emission shield employed on wireless personal and portable electronic devices, containing one or more layers of radio frequency (RF) or electromagnetic (EM) screening material, shielding the user from harmful RF or EM radiation, or a redirection antenna that receives all RF signals, and redirects those signals away from the user. The RF emission shield may be contained within a plurality of outer layers, providing a secure fit to a wireless electronic device and an outer layer providing an easy grip for the user.

Abstract: An example method performed by a wireless-power-transmitting device including an antenna array is provided. The method includes, based on a location of the wireless-power-receiving device, selecting a first value for a first transmission characteristic that is used for transmission of electromagnetic waves by a first antenna group, and a second value, distinct from the first value, for the first transmission characteristic that is used for transmission of electromagnetic waves by a second antenna group. The method also includes transmitting to the location of the wireless-power-receiving device, by the first antenna group, first electromagnetic waves with the first value for the first transmission characteristic, and transmitting to a focal point that is further from the wireless-power-transmitting device than the location of the wireless-power-receiving device, by the second antenna group, second electromagnetic waves with the second value for the first transmission characteristic.

Abstract: A radome assembly for an antenna, comprises: a mounting ring comprising an annular bonding surface; a layer of radome fabric or film bonded to the annular bonding surface and extending radially inwardly and radially outwardly of the bonding surface; and an annular enclosing element located radially outwardly of the bonding surface which encloses or covers at least a portion of the fabric of film radially outward of the annular bonding surface.

Abstract: An antenna system and method for fabricating an antenna are provided. The antenna system includes a substrate and an antenna. The antenna includes a conductive particle based material applied onto the substrate. The conductive particle based material includes conductive particles and a binder. When the conductive particle based material is applied to the substrate, the conductive particles are dispersed in the binder so that at least a majority of the conductive particles are adjacent to, but do not touch, one another.

Abstract: A ground-penetrating radar device comprises a frame, a radar antenna, and an antenna assembly, wherein the antenna is part of the antenna assembly. Further the GPR device comprises a mount for adaptively mounting the antenna assembly to the frame and a ground support for supporting the frame on the ground. In an operational state, the mount prevents a horizontal displacement of the antenna assembly relative to the frame in two horizontal directions. In the operational state, the mount further allows a vertical displacement of the antenna assembly relative to the frame and a tilting of the antenna assembly relative to the frame.

Abstract: A method performed by an electronic device, includes: generating a beamforming signal by using a first antenna and a second antenna; increasing a first input value of a first power amplifier and a second input value of a second power amplifier, based on performance of the beamforming signal being deteriorated; measuring a first output value of the first power amplifier based on the increased first input value and measuring a second output value of the second power amplifier based on the increased second input value; and determining, based on the measured first output value and the measured second output value, at least one of the first power amplifier or the second power amplifier is deteriorated in performance, and connecting a first attenuator or a second attenuator electrically to the deteriorated power amplifier.

Abstract: This disclosure provides an antenna system to improve communication flexibility. The antenna system includes a radio frequency unit, a divider, a first modulator, a second modulator, a first antenna and a second antenna. The radio frequency unit is configured to generate a first radio frequency signal. The divider is configured to divide the first radio frequency signal into first and second radio frequency sub-signals. The first modulator is configured to adjust a first electrical downtilt of the first radio frequency sub-signal and send the adjusted first radio frequency sub-signal to the first antenna for transmission. The second modulator is configured to adjust a second electrical downtilt of the second radio frequency sub-signal and send the adjusted second readio frequency sub-sibnal to the second antenna for transmission. The adjustion is based on a target downtilt of the first radio frequency signal and a mechanical downtitlt of the first or second antenna.

Abstract: An electronic device having an antenna structure is disclosed. The antenna structure includes a substrate, a first radiating portion, a second radiating portion connected to the first radiating portion, a grounding portion, a shorting portion connected between the second radiating portion and the grounding portion, a third radiating portion, a first grounding extension portion connected between the third radiating portion and the grounding portion, and a first capacitive element coupled between a first section and a second section of the shorting portion. The coupling of the shorting portion, the first grounding extension portion, and the third radiating portion generates a first operating frequency band, and the coupling of the first radiating portion, the shorting portion, the first grounding extension portion, and the third radiating portion generates a second operating frequency band, which is higher than the first operating frequency band, through the matching of the first capacitive element.

Abstract: An electronic device according to various embodiments of the present disclosure may comprise: a first housing; a second housing configured to accommodate at least a portion of the first housing and to guide a sliding motion of the first housing; a flexible display including a first display area connected to the first housing, and a second display area extending from the first display area and capable of bending or rolling; a circuit board disposed in the first housing and movable in response to the sliding motion of the first housing; an antenna structure formed on an outer surface of the second structure, and including a first part and a second part that are symmetrical about a first axis perpendicular to the sliding motion direction; and a feeding structure disposed on the circuit board configured to feed power to the antenna structure.

Abstract: An antenna is provided, which includes: a main stub, a first parasitic stub, and a second parasitic stub. The first parasitic stub and the second parasitic stub are respectively arranged on two sides of the main stub. The first parasitic stub and the second parasitic stub are configured to excite resonances to improve main resonance efficiency or expand bandwidth. A frequency of the resonance excited by the first parasitic stub is greater than a frequency of a resonance excited by the main stub. A frequency of the resonance excited by the second parasitic stub is less than the frequency of the resonance excited by the main stub.

Abstract: An antenna includes a reflector, a radiating element extending forwardly of the reflector, and a director positioned forwardly of the radiating element. The director includes a plurality of passive impedance elements that provide frequency-dependent reactances to currents induced therein responsive to electromagnetic radiation generated by the radiating element. The plurality of passive impedance elements include: (i) a primary capacitive element, (ii) a first series LC circuit having a first inductor therein electrically connected to a first portion of the primary capacitive element, and (iii) a second series LC circuit having a second inductor therein electrically connected to a second portion of the primary capacitive element.

Abstract: Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Abstract: A wearable device is provided. The wearable device includes a substrate and a first antenna module. The first antenna module includes a first magnetic core and a first antenna wire coil. The first magnetic core is disposed on the substrate. A first angle is formed between the first magnetic core and the substrate. The first antenna wire coil is wound disposed on the first magnetic core.

Abstract: An antenna device is provided that includes an antenna circuit and a resistance circuit. The antenna circuit has a first inductor. The resistance circuit has a second inductor and is electrically connected to the antenna circuit. The first inductor has a first winding and a core arranged inside the first winding. The second inductor has a second winding that comprises an air-core coil.

Abstract: A patch antenna comprising: a planar radiating element; a parasitic element provided at a position spaced apart from an end portion of the radiating element in a plan view when the radiating element is viewed from a direction perpendicular to a surface of the radiating element; and a cable electrically connected to the radiating element and configured to supply power to the radiating element, wherein an axis of the cable passing through a position where the cable is electrically connected to the radiating element is spaced apart from a center of the parasitic element.

Abstract: A wireless device comprises a radiating system that comprises and a radiating structure that operates in at least two frequency regions. The radiating structure comprises: a ground plane layer having a first connection point; a single radiation booster having a first connection point; a radiofrequency system comprising a first input port, a plurality of external output ports, and a plurality of branches, at least some of the plurality of branches being connected to a common point connected to the first input port, wherein each of the plurality of external output ports provides operation in at least one of the at least two frequency regions of operation; and a first internal port defined between the first connection point of the radiation booster and the first connection point of the ground plane layer, the first internal port being connected to the first input port of the radiofrequency system.

Abstract: A band-pass filter may include a first electrical conductor extending a first distance; a second electrical conductor extending from the first electrical conductor, the second electrical conductor may extend a second distance at least partially parallel to the first distance; and a third electrical conductor extending a third distance parallel to and between the first electrical conductor and the second electrical conductor. The first and third electrical conductors may at least partially overlap along a first length, and the first and third electrical conductors may be electromagnetically coupled at least along the first length. The second and third electrical conductors may at least partially overlap along a second length, and the second and third electrical conductors may be electromagnetically coupled at least along the second length. The first length may correspond to a first frequency. The second length may correspond to a second frequency.

Abstract: A production method of a communication device includes a step of forming an antenna substrate and a circuit substrate independently from each other. The production method also includes a step of joining the antenna substrate and the circuit substrate simultaneously with joining of a power feeding pad and a power feeding path. In brief, the production method executes two discrete steps: forming the circuit substrate and forming the antenna substrate. This improves a production yield of the communication device as compared with the circuit substrate and the antenna substrate are produced in a single step.

Abstract: A multi-modal antenna for use in magnetic resonance applications, the multi-modal antenna including an elongate first conductive element, an elongate second conductive element at least partially aligned with and spaced from the first conductive element and a dielectric material at least partially separating the first and second conducting elements so that the first and second conductive elements are electromagnetically coupled and/or electrically connected, and wherein at least one of the first and second conducting elements are configured to be electromagnetically coupled and/or electrically connected to an RF system so that the multi-modal antenna can at least one of transmit and receive RF electromagnetic signals for performing magnetic resonance imaging or spectroscopy.

Abstract: A communication antenna comprises an electrically conductive base assembly at a lower section of the antenna; a loading coil assembly, at a midsection of the antenna, and electrically connected to the base assembly; and a re-entrant capacitive hat assembly, at an upper section of the antenna, and electrically connected to the loading coil assembly, wherein the re-entrant capacitive hat assembly includes: a hat housing and a support tube longitudinally extending through the hat housing a domed shaped endcap and an insulative bushing.

Abstract: A dielectric waveguide antenna and manufacturing method, as well as a quasi-helical antenna device. The electrically conducting features within the dielectric waveguide antenna are manufactured using standard printed circuit board (PCB) manufacturing technology. Internal elements of the PCB antenna construction may be capacitively coupled or galvanically coupled. The final outer form of the dielectric waveguide antenna is machined by turning on a lathe, and the final outer form is accurately aligned and registered to the electrically conducting features within. The quasi-helical antenna device comprises a repeating, periodic, chain of substantially straight conductive segments that are wound about a central axis. The quasi-helical antenna is fabricated within a planar printed circuit.

Abstract: The disclosure relates to an antenna arrangement, including an antenna mounted inside a radome. The antenna arrangement further includes a mounting arrangement arranged to mount the antenna arrangement to an antenna platform. The antenna is a tapered slot antenna, the radome has an aerodynamic shape, and the mounting arrangement includes two antenna fastening means and an antenna radio frequency connector arranged to interact with corresponding antenna platform fastening means and an antenna platform radio frequency connector arranged on the antenna platform.

Abstract: An antenna device. The antenna device includes a carrier element having at least one first strip conductor and having a second strip conductor; at least one fastening structure, which is formed in or on the carrier element; at least one antenna element, which is arranged or fastened on or in the fastening structure and is connected to the strip conductor; a transmitter device, which is arranged on the carrier element and is connected to the second strip conductor, and is designed to transmit a transmitter signal to the at least one antenna element and/or to receive a transmitter signal from the at least one antenna element.

Abstract: An antenna device includes a metal layer for forming an antenna element in a predetermined planar shape and a ground arranged on a lower side of the metal layer. The metal layer forms a first metal forming the planar shape, a notch portion formed at the first metal, and cutting out a part of an edge of the planar shape, a second metal being an electromagnetic field coupling element arranged with a predetermined distance spaced from the first metal inside the notch portion, and a feeder line formed outside the planar shape, and to be connected with the second metal via an opening portion of the notch portion. For the second metal, a width at the opening portion is smaller than a maximum width at a portion more inside the notch portion than the opening portion.

Abstract: The present disclosure relates to an antenna RF module and an antenna apparatus including the antenna RF modules. The antenna RF module includes an RF filter arranged on a front surface of a main board, a radiation element module arranged on a front surface of the RF filter, at least one reflector grill pin arranged between the RF filter and the radiation element module and grounding (GND) the radiation element module, outside air being introduced from in front of the RF filter to in back of the RF filter or being discharged from in back of the RF filter to in front of the RF filter through the at least one reflector grill pin, and a radome combined with the front surface of the RF filter and protecting the radiation element module from the outside.

Abstract: A low profile phased array antenna that is configured to be manufactured using additive manufacturing techniques is provided. In one or more embodiments, the phased array can include a plurality of signal ears, ground ears, and clustered pillars that can be arranged in relation to a base plate such that each component of the antenna can be manufactured from a single piece of material, thereby allowing for the use of additive manufacturing techniques which can substantially reduce the cost and time of the manufacturing process. The phased array can include a signal ear that include one or more posts that interface with an airgap located within a base plate of the array, wherein the size of the airgap in relation to the size of the post is configured to achieve an optimal level of impedance matching.

Abstract: This disclosure relates generally to metasurface beam steering antenna and method of setting antenna beam angle. Conventional approaches perform electronically beam steering using phase array which requires bandwidth with higher data rates. The present disclosure enables metasurface antennas tilt antenna beam in a given direction, where the varactor diodes are operated in reverse bias so that different values of capacitors combination lead to electronic beam scanning. The processor of the metasurface beam steering antenna receives a command having an input angle to tilt the angle beam position. The processor processes the command by mapping the input angle with the set of c-shaped copper patch combination having the capacitor values using a predefined lookup table for setting the antenna beam angle based on a reference voltage generated by the varactor diode. The lookup table is iteratively updated with the capacitor values of the c-shaped copper patches.

Abstract: Antenna-directivity adjustment is implemented by adjusting an antenna of a radio communication device in horizontal, vertical, and rotation angles in response to received-signal levels and cross-polarization discriminations. Received-signal levels (RSL) are measured by moving the antenna of the radio communication device in horizontal and vertical directions. Cross-polarization discriminations (XPD) are calculated according to received-signal levels (RSL) measured by changing vertical polarization and horizontal polarization on a transmit side and a receive side with the antenna when rotated and an interference level measured between vertical polarization and horizontal polarization. An antenna direction is adjusted to maximize received-signal levels and cross-polarization discriminations.

Abstract: A base station antenna includes a calibration circuit that has a plurality of pairs of directional couplers and an antenna array that includes a plurality of columns of radiating elements. The first polarization radiators of the radiating elements in each column are electrically connected to a first directional coupler of a respective one of the pairs, and the second polarization radiators of the radiating elements in the column are electrically connected to a second directional coupler of the respective one of the pairs. The directional couplers may be arranged in a manner that reduces in-column coupling and/or that reduces cross-column coupling between adjacent columns of radiating elements.

Abstract: The present disclosure relates to an antenna assembly, which comprises: a feeder panel; an array of radiating elements mounted on the feeder panel; an array of parasitic elements mounted on the feeder panel, in which, at least a portion of the radiating elements in the array of radiating elements are surrounded by a plurality of spaced-apart parasitic elements, respectively, and at least a portion of the parasitic elements in the array of parasitic elements each comprise a first parasitic subcomponent extending in a first direction and a second parasitic subcomponent extending in a second direction perpendicular to the first direction. In addition, the present disclosure also relates to a base station antenna comprising the antenna assembly. This is capable of effectively improving the cross-polarization performance of the base station antenna and improving the radiation boundary of the base station antenna.

Abstract: Base station antennas are provided. A base station antenna includes a reflector having a first surface and a second surface that is opposite the first surface. The antenna includes first and second feed boards having first and second integrated beamforming networks, respectively, on the first surface of the reflector. The antenna includes a first plurality of high-band radiating elements that extend forward from the first feed board. The antenna includes a second plurality of high-band radiating elements that extend forward from the second feed board. Moreover, the antenna includes a plurality of low-band radiating elements on the first surface of the reflector.