25 results about "Dipole radiation" patented technology

Base station antennas include a reflector; a first plurality of cross-dipole radiating elements that are arranged as a first array of cross-dipole radiating elements, each cross-dipole radiating element comprising a first dipole radiator having a first dipole arm and a second dipole arm and a second dipole radiator having a third dipole arm and a fourth dipole arm; and a plurality of parasitic monopole elements that are associated with a first of the cross-dipole radiating elements, each parasitic monopole element including a monopole radiator, wherein at least half of each monopole radiator is positioned within a footprint of the first and second dipole radiators of the first of the cross-dipole radiating elements when the first of the cross-dipole radiating elements is viewed from the front.

Radiating elements comprise a first dipole radiator that includes a first dipole arm and a second dipole arm, a second dipole radiator that includes a third dipole arm and a fourth dipole arm and first through fourth electromagnetic bandgap structures that are coupled to distal end portions of the respective first through fourth dipole arms.

Radiating elements comprise a feed column, a first dipole radiator that includes a first dipole arm and a second dipole arm that are connected to the feed column, and a second dipole radiator that includes a third dipole arm and a fourth dipole arm that are connected to the feed column. The feed column, the first dipole radiator and the second dipole radiator are formed as a monolithic structure.

The invention belongs to the technical field of microwave antennas, and particularly provides an ultra-low-profile wide-angle scanning ultra-wideband tight coupling phased-array antenna based on double mountain-shaped dipoles. The ultra-wideband antenna comprises an ultra-low-profile wide-angle scanning ultra-wideband radiation structure (I) based on double-E-shaped dipoles, namely an improved double-E-shaped dipole radiation structure; a feed strip line and a balun structure (II), namely a strip line feeder using a gradually changed defected ground on a vertical plane and a balun structure at the tail end; and the feed microstrip line structure (III) is a microstrip line feeder line on a horizontal plane. According to the invention, the improved double-E-shaped radiation structure is applied to the tightly-coupled antenna, which is equivalent to the introduction of a plurality of LC parallel matching branches in a unit aperture, so that the impedance matching of an array can be greatly improved, especially the impedance matching of low frequency is improved, the low-frequency bandwidth is expanded, and the scanning capability is improved at the same time.

The invention discloses a dual-port coaxial feed circular polarization magnetoelectric dipole antenna, and belongs to the technical field of millimeter wave satellite communication antennas. The antenna comprises a first metal patch layer, a dielectric substrate a, a second metal patch layer, a dielectric substrate b and a metal ground which are sequentially stacked from top to bottom, the second metal patch layer comprises four radiation patches which are arranged in a rectangular array, and each radiation patch is composed of a square patch and a circular ring patch at an inner corner; a metal through hole is formed in the dielectric substrate and is connected with the radiation patch and the metal ground, so that a magnetoelectric dipole radiation path is formed; the first metal patch layer is provided with a probe patch a, the center of the second metal patch layer is provided with a probe patch b, and the probe patch a and the probe patch b form two space orthogonal inverted L-shaped feed probes through a short column and a long column respectively; and the inner conductors of the two feed ports are respectively connected with the long columns of the two probes. The antenna has the advantages of wide impedance bandwidth, wide beam coverage, low profile and easy integration, and is suitable for a low-orbit satellite communication terminal.

The invention discloses a system-integrated dipole antenna and a manufacturing method thereof, and relates to the technical field of antenna design, and the system-integrated dipole antenna comprises a dipole radiation module which is used for achieving the energy conversion between a radio frequency signal and a space electromagnetic wave; an integrated balun module and a transceiver circuit module are arranged on the circuit board; the integrated balun module is connected with the two metal radiation arms of the dipole radiation module through feeding points. The transmit-receive circuit module is electrically connected with the integrated Balun module, and performs signal transmission with the dipole radiation module through the integrated Balun module. Compared with a traditional separated antenna and a system architecture of a radio frequency front end, the system integrated dipole antenna realizes balance feed and differential interface integration, energy loss and the size of the system integrated dipole antenna are remarkably reduced, and the integration level and reliability of the system integrated dipole antenna are remarkably improved.

The invention relates to the field of low-scattering array antennas, in particular to a conformal dual-polarization low-scattering array antenna. According to the scheme, the antenna comprises a dielectric substrate 1, a dipole radiation patch 2, a parasitic patch 3, a wave-absorbing material 4, a feed balun 5 and a metal floor 6, the dielectric substrate 1 and an outer skin of a platform are conformal, the dipole radiation patch 2 subjected to modification and hollowing treatment is printed on the upper surface of the dielectric substrate 1, the parasitic patch 3 is printed on the lower surface of the dielectric substrate 1, and the dielectric substrate 1 is printed on the dielectric substrate 1. The wave-absorbing material 4 is attached to the lower surface of the dielectric substrate 1 and is conformal with the dielectric substrate 1, and the feed balun 5 penetrates through the dielectric substrate 1, the wave-absorbing material 4 and the metal floor 6 and is connected with radiation arms on the two sides of the dipole radiation patch 2 respectively. According to the invention, the antenna scattering can be effectively reduced by shaping and hollowing out the dipole radiation patch, and the standing wave performance can be improved and the scattering can be reduced by loading the parasitic structure and the wave-absorbing material in the space below the dielectric substrate. The method is suitable for the stealth platform.

Antennas include a first radiating element that is configured to operate in a first operating frequency band, and a second radiating element that is configured to operate in a second operating frequency band that encompasses higher frequencies than the first operating frequency band. The first radiating element includes a first dipole radiator having first and second dipole arms and a second dipole radiator having third and fourth dipole arms. The first dipole arm includes a first metal region that substantially surrounds a first non-metal interior region, and the first non-metal interior region is configured so that currents induced on a first portion of the first metal region by RF energy emitted by the second radiating element substantially cancel currents induced on a second portion of the first metal region by the RF energy emitted by the second radiating element.

The application provides a high-gain dual-polarized dipole antenna, which comprises a first dielectric plate, a second dielectric plate, a reflecting plate, a first coaxial cable, a second coaxial cable, a first 1:2 power divider, a second 1:2 power divider, an antenna radiator and four feed baluns; the first dielectric plate is arranged in parallel above the middle part of the second dielectric plate, the reflecting plate is printed on the lower surface of the second dielectric plate, and the first 1:2 power divider and the second 1:2 power divider are printed on the upper surface of the second dielectric plate; the antenna radiator is printed on the upper surface of the first dielectric plate and comprises four dipole radiation arms; the four feed baluns are arranged between the first dielectric plate and the second dielectric plate, and one feed balun is arranged below every adjacent two dipole radiation arms in the circumferential direction. The application realizes wide bandwidth, high gain and good directional radiation performance through a simple and compact structure.

An antenna and a communication device are disclosed, and relate to the field of communication device technologies. The antenna includes a ground plane and at least one group of antenna elements disposed on the ground plane. One group of antenna elements include two dipole radiation arms and two monopole radiation arms. A feed point is provided on the dipole radiation arms and / or the monopole radiation arms. The dipole radiation arms are provided with a support structure. For a same group of antenna elements, both the two dipole radiation arms are disposed in parallel to the ground plane via the support structure; both the two monopole radiation arms are vertically disposed on the ground plane; and both the two dipole radiation arms are located between the two monopole radiation arms, and the two dipole radiation arms and the two monopole radiation arms are in a same plane.

The invention relates to an antenna structure of an automobile tire pressure sensor, and the antenna structure comprises a radiation section which is of a spiral coil structure and is configured to be in a normal mode radiation mode under the working frequency and generate an electric dipole radiation field and an equivalent magnetic dipole radiation field at the same time, and the phases of the two radiation components are the same. The limitation of a single radiation mode of a traditional loop antenna is broken through, the symmetrical spiral dipole structure is adopted, the antenna can excite electric dipole radiation and equivalent magnetic dipole radiation at the same time, the two radiation components are the same in phase, far fields are overlapped in the same phase, and the radiation gain of the antenna is remarkably higher than that of the traditional loop antenna. The radiation gain can be effectively improved, the TPMS signal transmission reliability is greatly improved, and the packet loss rate is reduced.

Base station antennas include a reflector; a first plurality of cross-dipole radiating elements that are arranged as a first array of cross-dipole radiating elements, each cross-dipole radiating element comprising a first dipole radiator having a first dipole arm and a second dipole arm and a second dipole radiator having a third dipole arm and a fourth dipole arm; and a plurality of parasitic monopole elements that are associated with a first of the cross-dipole radiating elements, each parasitic monopole element including a monopole radiator, wherein at least half of each monopole radiator is positioned within a footprint of the first and second dipole radiators of the first of the cross-dipole radiating elements when the first of the cross-dipole radiating elements is viewed from the front.

The invention discloses a four-direction pattern reconfigurable antenna. The antenna is of a rotational symmetric structure composed of a single-layer dielectric substrate and a double-layer four-direction radiation structure. The antenna takes an electric dipole structure as a basic radiation structure, directional radiation of the antenna is realized by introducing a reflection structure, radiation gain of the antenna is improved by introducing a guide structure, impedance matching of the antenna is improved and bandwidth of the antenna is broadened by adding a U-shaped groove structure in the electric dipole radiation structure, and in order to realize reconfiguration of a directional diagram of the antenna, the antenna is provided with a U-shaped groove structure. An antenna structure is rotated, four pairs of PIN diodes and corresponding control circuits are added in parallel double lines of a feed structure, and the radiation direction of the antenna is controlled by controlling the opening and closing states of the PIN diode pairs. Due to introduction of the reflection structure and the guide structure, the directional radiation capability and the antenna gain of the antenna are improved, the communication distance is increased, and the working bandwidth of the antenna can be widened; the design of the direct-current feed structure enables the radiation direction of the antenna to be controlled more flexibly.

The invention provides a broadband wide-angle tight coupling dipole array antenna working at a Ka wave band. The broadband wide-angle tight coupling dipole array antenna is composed of a plurality of antenna units arranged in a matrix mode. Each unit comprises a single-layer Rogers 5880 dielectric substrate, a bottom-layer metal floor, an upper-layer wide-angle matching layer and a tight dipole radiation layer; wherein the tail ends of vibration arms of the bow-tie-type dipole units are mutually overlapped to enhance coupling, the hyperbolic impedance transformers realize conversion from unbalance to balance and broadband matching, the short-circuit metal wires inhibit common-mode resonance, and the wide-angle matching layer is a frequency selective surface formed by rectangular metal patches. Passive edge units are additionally arranged on the two sides of the array, outer side short-circuit lines are removed to slow down the truncation effect, the metal wall and the floor are integrally machined, the active standing-wave ratio within 27.5-35 GHz is smaller than or equal to 2.1 when + / -50-degree scanning is supported, and the efficiency is larger than or equal to 80%. The antenna has the advantages of low profile, high integration, wide bandwidth angle and high radiation efficiency, and is suitable for a millimeter wave communication system.

The invention discloses a low-profile wide-angle scanning tight coupling array antenna loaded with resistive rings, and aims to solve the technical problem that the existing low-profile tight coupling array antenna cannot simultaneously realize the comprehensive performance of ultra wide band and wide-angle scanning. The upper surface of a dielectric block in the low-profile wide-angle scanning tight coupling array antenna is a metasurface, a first dielectric plate is inserted into the lower portion of the dielectric block, a dipole is printed on the upper surface of the first dielectric plate, resistive rings are arranged on the two sides of the dipole respectively, a parasitic patch is printed on the lower surface of the first dielectric plate, and the parasitic patch is printed on the lower surface of the dielectric block. The strip-shaped Marchand balun is arranged perpendicular to the floor, and the upper portion of the Marchand balun is connected with the dipole. The resistive ring is introduced into the dipole radiation array plane, so that the variation amplitude of input impedance in a broadband is slowed down, the maximum scanning angles of the E plane and the H plane of the formed phased-array antenna array reach + / -60 degrees, the active standing-wave ratio is smaller than 3, the unit profile height is only 0.062 lambda 1, and the low profile requirement is met.

The present application relates to the field of low scattering array antenna, and particularly relates to a conformal dual-polarized low scattering array antenna. The scheme comprises a dielectric substrate 1, a dipole radiation patch 2, a parasitic patch 3, a wave absorbing material 4, a feed balun 5, and a metal floor 6. The dielectric substrate 1 is conformal to the outer skin of a platform. The dipole radiation patch 2 is printed on the upper surface of the dielectric substrate 1 after being shaped and hollowed. The parasitic patch 3 is printed on the lower surface of the dielectric substrate 1. The wave absorbing material 4 is attached to the lower surface of the dielectric substrate 1 and is conformal to the dielectric substrate 1. The feed balun 5 penetrates the dielectric substrate 1, the wave absorbing material 4 and the metal floor 6 and is connected to the two side radiation arms of the dipole radiation patch 2 respectively. The present application can effectively reduce the antenna scattering by shaping and hollowing the dipole radiation patch. The space below the dielectric substrate is loaded with a parasitic structure and a wave absorbing material, which can improve the standing wave performance and reduce the scattering. The present application is suitable for stealth platforms.

A cross-dipole radiating element includes a feed stalk having a base and a distal end that is positioned forwardly of the base, a first dipole radiator mounted at the distal end of the feed stalk, the first dipole radiator including a first dipole arm and a second dipole arm, and a second dipole radiator mounted at the distal end of the feed stalk, the second dipole radiator including a third dipole arm and a fourth dipole arm. The feed stalk includes a first ground line, a first signal trace that at least partially overlaps the first ground line, and a transmission line segment that extends from the first ground line and / or the first signal trace, and the transmission line segment includes a transmission line signal trace that is short-circuited to a ground conductor of the transmission line segment.

The application discloses a Luneberg lens antenna array applied to high-speed rail 5G communication, which comprises a cylindrical multilayer dielectric Luneberg lens and a plurality of broadband dual-polarized dipole antennas from top to bottom. The broadband dual-polarized dipole antenna comprises an impedance matching layer, a dipole radiation structure, a feed balun, a fixed plate and an aluminum reflecting plate from top to bottom. The impedance matching layer is composed of an impedance matching layer dielectric substrate and a rectangular parasitic patch arranged on the lower surface of the impedance matching layer dielectric substrate. The application aims at the demand of high-speed rail 5G signal coverage application for antennas at present, and provides a Luneberg lens antenna array applied to high-speed rail 5G communication. The beam convergence characteristics of the cylindrical Luneberg lens are utilized in the structure to narrow the horizontal plane half-power beam width of the antenna without affecting the vertical beam width of the antenna, improve the gain of the antenna and reduce the intercell interference with other base stations.

The invention discloses a time-modulation low-scattering strong-coupling broadband array antenna with diodes integrated on an array plane, and relates to the technical field of antennas. The array antenna adopts a multilayer printed board technology, and comprises a wide-angle impedance matching layer, a dielectric substrate printed with a dipole radiation unit and an array plane integrated diode circuit, and a metal reflection floor integrated with a microstrip power divider. Strong coupling between the dipole radiation units is realized through the coupling gaps. The array surface integrated diode circuit comprises a first group of diodes and a second group of diodes. The first group of diodes is loaded at a dipole coupling gap and is used for regulating and controlling the access state of a parasitic metal structure. And the second group of diodes are loaded at the joint of the feed balun and the dipole and are used for reconstructing a feed mode. According to the invention, through time sequence regulation and control of the array plane integrated diode, on the premise of ensuring basic stability of antenna radiation characteristics, time modulation and frequency spectrum shift of a scattered field are realized by using a compact array plane integrated structure, and a radar cross section of the antenna in a 2-3GHz working frequency band is effectively reduced.

The present invention relates to a base station antenna comprising a first array configured to emit electromagnetic radiation within a first frequency band to form a first antenna beam, the first array comprising a first column of radiating elements arranged substantially along a first longitudinal axis of the base station antenna, the first column comprising pairs of first and second radiating elements, the first radiation element is a cross dipole radiation element; and the second radiating element pair comprises a pair of second radiating elements which are arranged on two sides of the first longitudinal axis in a manner of facing each other, wherein each second radiating element comprises a first radiating arm and a second radiating arm which extend in opposite directions approximately along the first longitudinal axis respectively, and a third radiating arm which extends towards the first longitudinal axis approximately perpendicular to the first radiating arm and the second radiating arm. The invention also relates to a multiband base station antenna.

The utility model relates to an antenna and a wireless communication device. The antenna includes: an antenna substrate; the first antenna is of a monopole radiation structure, the second antenna is of a dipole radiation structure, and the first antenna and the second antenna are arranged on the antenna substrate in the length direction of the antenna substrate; wherein the first antenna is used for omni-directionally radiating a signal of a first frequency band, the second antenna is used for omni-directionally radiating a signal of a second frequency band, and the frequency range of the first frequency band is at least partially different from that of the second frequency band; the first antenna has a horizontal polarization direction and a vertical polarization direction, and the second antenna has a vertical polarization direction, so that the isolation degree of the first antenna and the second antenna is greater than an isolation degree threshold value. The antenna can support multi-band broadband, and the isolation between the first antenna and the second antenna and the antenna efficiency are ensured.

The invention belongs to the technical field of microwave antennas, and particularly provides an ultra-low cross polarization wide-angle scanning low-profile tight coupling phased-array antenna loaded with a sagittal moon shape. The antenna comprises a vector penetrating moon-shaped wide angle matching layer (I), a dipole radiation structure (II), a Double-Y balun structure (III) and a feed microstrip line structure (IV). The vector-through moon-shaped wide-angle matching layer provided by the invention fuses the design of a metasurface and a polarization grid, and realizes dual functions: the wide-angle scanning capability of the array is improved in the main polarization direction, and the cross polarization radiation is remarkably suppressed in the cross polarization direction through a negative equivalent dielectric constant effect. The layer can be manufactured on the same PCB, and the structural complexity is not increased. In order to expand the low-frequency bandwidth, a feed network, a dipole, a short-circuit probe and a metal floor are utilized, a loop current mode is introduced at low frequency according to the mirror image principle, and the mode is equivalent to magnetic dipole radiation. Finally, 5: 1 bandwidth (0.8-4GHz) and E / H plane 45-degree scanning are realized, cross polarization is respectively lower than-54 dB and-30 dB, and the profile is only 0.089 times of low-frequency wavelength.

The application discloses a low-profile ultra-wideband tightly coupled antenna array with a super large frequency multiplication ratio, which comprises an array unit, the array unit comprises a first dielectric substrate, a second dielectric substrate, a wide-angle matching layer metal sheet, a dipole radiation unit, a capacitive coupling metal sheet, an intermediate dielectric substrate, a gable gap resistance sheet, a metal floor and a three-layer tapered balun; the wide-angle matching layer metal sheet is printed on the top intermediate layer of the first dielectric substrate and the second dielectric substrate; the dipole radiation unit is printed directly below the wide-angle matching layer metal sheet; the capacitive coupling metal sheet is printed on the front and back sides of the dipole radiation unit and the outer sides of the first dielectric substrate and the second dielectric substrate; the intermediate dielectric substrate is printed on the middle of the outer side of the first dielectric substrate; the gable gap resistance sheet is printed on the outer surface of the dielectric substrate; the metal floor is located at the bottom of the antenna unit; and the three-layer tapered balun is arranged between the metal floor and the dipole antenna radiation unit. The application has the advantages of super wide bandwidth, low profile and simple structure and is beneficial to processing and production.

The invention belongs to the technical field of antennas, and relates to a flexible high-directionality antenna structure which comprises a flexible dielectric substrate, and the flexible dielectric substrate forms a three-dimensional antenna body of a hollow cuboid structure in a surrounding mode. A first antenna radiation metal sheet is arranged on the top surface of the dielectric substrate; the dielectric substrate is provided with a second antenna radiation metal sheet which is distributed in a circle in the surrounding direction of the dielectric substrate. The part, located on the bottom surface of the dielectric substrate, of the second antenna radiation metal sheet forms a waveform structure of a rectangular wave; the first antenna radiation metal sheet and the second antenna radiation metal sheet form a magnetoelectric dipole radiation pair; and a feed structure of the antenna is arranged on one side surface of the dielectric substrate. The antenna structure disclosed by the invention can work in a specific frequency band, and better performance and compatibility can be realized; a flexible material and an internal filling material are adopted, so that the whole material of the antenna is soft and has self-adaptability; by optimizing the form of the Huygens antenna, better directional radiation and impedance matching are realized on a specific frequency band, and the stability of the antenna is ensured.

The application discloses an anti-metal wide-bandwidth RFID tag antenna and belongs to the technical field of radio frequency identification antennas. The antenna comprises a dielectric substrate, a radiation structure arranged on the surface of the dielectric substrate and a feed structure electrically connected with the radiation structure; the radiation structure comprises a perpendicular magnetic ring structure and dipole radiation arms arranged on both sides of the feed structure, wherein the middle part of the feed structure is used for connecting an RFID chip, and the two ends of the feed structure form a vertically closed loop with a metal mounting surface through a short-circuit structure. The perpendicular magnetic ring structure is used for generating a radiation field type mainly in a magnetic dipole mode, so as to reduce the influence of a metal surface on the radiation performance of the antenna; the dipole radiation arms introduce an electric resonance mode through electromagnetic coupling with the feed structure, and form a double-resonance working mechanism with the magnetic ring structure. By adjusting the structural parameters of the dipole radiation arms, the adjustment of the working frequency and impedance characteristics of the antenna can be realized. The antenna has simple structure and small size, is suitable for the application of an ultra-high frequency RFID tag in a metal environment, and can be used for passive Internet of Things application scenarios.