99 results about "Antenna bandwidth" patented technology

Techniques for dynamic polarization selection by antenna bandwidth are disclosed herein. An example device includes a first antenna configured to transmit signals within a first bandwidth range, a second antenna configured to transmit signals within a second bandwidth range that is different from the first bandwidth range, one or more processors, and one or more memories communicatively coupled to the first antenna, the second antenna, and the one or more processors. The memories store instructions that, when executed by the one or more processors, cause the device to: transmit, by the first antenna, a first signal at a first frequency included within the first bandwidth range, determine that a second signal is to be transmitted at a second frequency that is different than the first frequency, determine that the second frequency is included within the second bandwidth range, and transmit the second signal using the second antenna.

The invention discloses a double-frequency circularly polarized antenna element, which belongs to the technical field of antennas and comprises a high-frequency-band radiation unit and a low-frequency-band radiation unit. The high-frequency band radiation unit comprises a first dielectric substrate and a first feed probe. A first radiation patch is embedded in one end face of the first dielectric substrate, and the first radiation patch is provided with two symmetrical chamfers. The top end of the first feed probe passes through the first through hole and is fixedly connected with the first radiation patch. The low-frequency-band radiation unit comprises a second dielectric substrate, a second radiation patch and a third dielectric substrate. The second radiation patch is arranged on the second dielectric substrate. The second dielectric substrate is provided with a second metalized through hole. The third dielectric substrate is provided with a Chebyshev Balun feed printed line. The antenna element provided by the invention not only can realize the circular polarization of the antenna, but also can reduce the coupling between antennas of different working frequency bands while expanding the bandwidth of the antenna, improve the isolation between two working frequency band ports, and reduce the cross polarization.

The invention discloses a Terahertz broadband high-gain Vivaldi antenna based on a CPW (Coherent Plane Waveguide) rotary slot line structure, and belongs to the field of Terahertz communication. The antenna adopts an integrated single-layer metal structure on the top layer of a dielectric substrate, and is divided into a radiation arm and a CPW rotating slot line balun along the axial direction. The inner side edge of the radiation arm is a smooth exponential change curve, and the middle exponential gradual change groove forms a broadband traveling wave radiation channel. Periodic grid choke grooves are loaded on the outer side edge so as to suppress edge surface waves and improve a directional diagram. The feed part adopts a CPW to slot line balun structure to realize conversion from an unbalanced mode to a balanced mode, and a fan-shaped radial branch knot is utilized to form a broadband virtual short circuit boundary at a feed point to ensure unidirectional efficient transmission of energy. In addition, a group of string-shaped director patches are arranged in the opening area of the exponential gradual change groove along the central axis, and the wave beam is guided through phase correction. The terahertz planar antenna effectively solves the problems of limited bandwidth and insufficient gain of the terahertz planar antenna, and has the characteristics of compact structure, easiness in integration, excellent radiation performance and the like.

The invention relates to the technical field of wireless communication, and discloses a liquid crystal antenna and communication equipment, and the liquid crystal antenna comprises a liquid crystal box and a metal waveguide; the liquid crystal box at least comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is located between the first substrate and the second substrate. The metal waveguide is located on the side, away from the second substrate, of the first substrate. The liquid crystal box further comprises a first metal layer which is located on the side, away from the metal waveguide, of the first substrate. The first metal layer is grounded, and the first metal layer comprises two hollow grooves; the length direction of the metal waveguide is the same as that of the hollow groove; in the direction perpendicular to the plane where the first substrate is located, the metal waveguide and the two hollowed-out grooves are at least partially overlapped. The communication equipment comprises the liquid crystal antenna. According to the invention, insertion loss can be effectively reduced, antenna bandwidth is improved, and antenna gain is ensured.

This application provides an antenna, antenna array, and communication device, aiming to construct more degrees of freedom and antenna ports within a limited antenna panel size. The antenna includes: four independent feed points; and four helical arms corresponding one-to-one with the four feed points, each helical arm connected to its corresponding feed point. The helical end of each helical arm can be connected to its corresponding feed point using an open-circuit stub structure, and / or, the end of each helical arm can be coupled to a parasitic patch, and / or, the spacing w between two adjacent helical arms satisfies: w ≤ λ / 10, where λ is the operating wavelength. This design provides four degrees of freedom and widens the antenna bandwidth. Within the limited antenna panel size, this is beneficial for improving system throughput.

The invention relates to an antenna assembly and a vehicle. The antenna assembly comprises a dielectric body, a first antenna structure, a second antenna structure and a metal frame body. The projections of the plurality of second antenna structures on the dielectric body along the thickness direction of the dielectric body are arranged around the circumferential direction of the first antenna structure, the plurality of second antenna structures are rotationally symmetrical about the center of the first antenna structure, and each second antenna structure is coupled with the first antenna structure. The metal frame body is arranged around the periphery of the first antenna structure, and the metal frame body is connected with the dielectric body. The low-profile antenna structure is realized, the influence caused by the surface wave effect of the dielectric body is improved, the mutual coupling interference between double frequencies is reduced, and the antenna gain and the antenna bandwidth are improved. Besides, the metal frame body can restrain back lobe level energy, capacitance coupling is formed between the first antenna structure and the metal frame body, capacitance coupling is formed between the second antenna structure and the metal frame body, the antenna miniaturization design is further achieved, the overall size is reduced, and the installation space can be prevented from being limited.

The invention discloses an antenna housing framework for a broadband phased-array antenna, and belongs to the technical field of phased-array antennas. Which comprises a phased-array antenna body on which an antenna housing is arranged, and is characterized in that the antenna housing comprises an antenna housing upper layer, an antenna housing interlayer and an antenna housing lower layer; at least one of two sides of each layer in the three-layer structure of the antenna housing is provided with a radiation patch which is integrated with the antenna housing; the patch size of the radiation patch arranged on the antenna radiation surface of the phased-array antenna body and the patch size of the radiation patch arranged in the three-layer structure of the radome are sequentially reduced from bottom to top. According to the invention, the radiation patch is directly integrated on the antenna housing, so that the radiation patch becomes an organic component of a phased-array antenna radiation system; the radome is changed from a pure protection part to a key part with an active antenna bandwidth expansion function; the working bandwidth of the phased-array antenna can be effectively expanded on the premise that the complexity and the manufacturing cost of the phased-array antenna body are not greatly increased.

The invention relates to the technical field of antennas, in particular to a bandwidth-enhanced circularly-polarized reconfigurable microstrip antenna. Comprising a dielectric substrate and a metal floor attached to the lower surface of the dielectric substrate, and an annular patch, a driving branch knot, two parasitic branch knots and a direct current bias line are attached to the upper surface of the dielectric substrate. An inner conductor and an outer conductor of the coaxial cable are connected with the driving branch knot and the metal floor respectively, the driving branch knot excites a TM11 mode of the circular ring through an electric coupling path and excites a resonant mode of the parasitic branch knot through another magnetic coupling path, and the resonant parasitic branch knot excites another TM11 mode of the circular ring through electric coupling. And the circular polarization bandwidth with two axial ratio zero points is enhanced. The bias network controls the on-off of the diode on the parasitic branch knot through the DC voltage loaded by the coaxial cable so as to realize circular polarization reconfiguration. The antenna has the advantages of being compact in structure, enhanced in bandwidth, reconfigurable in circular polarization and low in profile, and compared with a circular polarization reconfigurable antenna of the same size, the bandwidth is expanded by more than one time, and the application range is wide.

According to the terminal antenna bandwidth and isolation cooperative enhancement method, an antenna is arranged on the edge of a dielectric substrate, one face of a metal patch is attached to the inner side of a rear cover of terminal equipment, the other face of the metal patch is opposite to one face of the dielectric substrate (middle frame), and the metal patch is composed of a plurality of sub metal patches. On one hand, the sub-metal patches are effectively excited by the antenna to realize bandwidth expansion, and on the other hand, the sub-metal patches counteract an original coupling path to realize isolation enhancement. The metal patches are arranged on the periphery of the antenna, and the size and the position of the metal patches are optimized, so that the antenna can realize wide bandwidth and high isolation under the condition of extremely small clearance and distance. The method can be widely applied to the fields of mobile communication terminal equipment, Internet of Things terminal equipment and the like.

The application discloses a low-profile wideband antenna for a 5G-WiFi frequency band. The low-profile wideband antenna comprises a dielectric substrate and a metal radiation layer arranged on the upper surface of the dielectric substrate. The metal radiation layer comprises a rectangular patch and two identical U-shaped patches, and the two identical U-shaped metal patches are arranged close to the radiation edge and the non-radiation edge of the rectangular patch at the same time, so as to surround the rectangular patch. Two longitudinal metal slots are loaded on the rectangular patch, and a horizontal line rectangular slot is arranged to enhance the bandwidth of the antenna. The low-profile wideband antenna can ensure that the antenna has a low antenna profile and has sufficient bandwidth to cover WLAN 5.2GHz (5.15-5.36GHz), WLAN 5.8GHz (5.725-5.825GHz) and WiMAX 5.5 (5.25-5.825GHz).

The application discloses a binary antenna with ultra-wideband and high isolation and a design method thereof, and mainly solves the problem that the bandwidth of the existing traditional antenna is too narrow to adapt to the demand of a wideband communication system. The application comprises a dielectric substrate, a metal floor and two symmetrical cone monopole antennas and a symmetrically designed antenna decoupling matching network (DMN), wherein the DMN is formed by bending eleven groups of transmission lines with fixed length and width, the first seven groups are used for decoupling of the antenna, and the last four groups are used for matching adjustment. Through the DMN, high port isolation (> 20 dB) between the two cone monopole antennas is realized. The DMN designed in the application has high design freedom, and compared with other decoupling technologies, a wider decoupling bandwidth is realized.

This application discloses a wide-beam cavity antenna element and its phased array antenna. The cavity antenna element includes a first radiating patch, a first dielectric layer, a second radiating patch, an adhesive layer, a second dielectric layer, and a metal ground layer arranged sequentially. The first radiating patch has a first chamfer on each diagonal and a first U-shaped slot in its center. The second radiating patch has a second chamfer on each diagonal and a second U-shaped slot in its center. This application adopts a dual-radiating patch structure, with the first and second radiating patches located in different dielectric layers, effectively expanding the antenna bandwidth and improving radiation efficiency. The double-layer square microstrip patch design is compact and facilitates miniaturization and integration. The first radiating patch incorporates the first chamfer and the first U-shaped slot, while the second radiating patch incorporates the second chamfer and the second U-shaped slot, increasing the current path and transforming the original single resonant point into three resonant points within the frequency band, significantly widening the antenna's impedance bandwidth.

The invention belongs to the technical field of antenna and radio frequency circuit integration, and discloses a cavity antenna circuit integrated metamaterial and a preparation method thereof. By removing part of the dielectric substrate to construct the artificial cavity, space is provided for a radio frequency functional circuit, and efficient coplanar integration of the antenna and the radio frequency circuit is realized. According to the invention, the mutual restriction of the thickness of the dielectric substrate on the antenna bandwidth and radio frequency circuit design can be overcome, the design flexibility and stability are improved, and the application scene is expanded. Through cavity and space stacking integration, the problem that in the prior art, an antenna and a radio frequency circuit are machined on the same layer of substrate at the same time, and consequently the design requirements of the antenna and the radio frequency circuit are contradictory is solved, the artificial cavity is formed in the bottom of the antenna medium, and the radio frequency function circuit executing the electromagnetic function is arranged in the artificial cavity, so that the antenna efficiency is improved. The prepared cavity antenna circuit integrated metamaterial can simultaneously exert the optimal performance of the two parts of an antenna and a radio frequency circuit, and the design flexibility is greatly improved.

The low-profile vehicle-mounted antenna comprises a PCB monopole antenna, the PCB monopole antenna comprises a board body, antenna radiation patterns are arranged on the front face and the back face of the board body respectively, the board body directly feeds through a cable, and a printing grounding structure is arranged on the board body, forms electromagnetic coupling with the cable and is used for expanding the bandwidth of the antenna. According to the low-profile vehicle-mounted antenna, the antenna radiation patterns are arranged on the two sides of the plate body respectively, so that a low-profile flat structure is achieved, and the height of the antenna is reduced. And meanwhile, by reasonably utilizing the coupling effect of the cable and the printed grounding structure on the radiation patch, the bandwidth of the antenna is expanded, and the full-band stable performance is realized. And direct feeding is realized through the cable without an additional and complex feed network, so that the effects of simplifying the structure and reducing the cost are achieved.

The invention provides a broadband horizontal polarization waveguide slot antenna array, which comprises a radiation slot layer, a slot coupling layer, a feed network layer and a standard waveguide interface, and is characterized in that the radiation slot layer is provided with 16 independent ridge waveguides, 16 V-shaped slots are cut on each ridge waveguide, each ridge waveguide is blocked by three cavity isolation walls to form four ridge waveguide sections, and each cavity isolation wall is provided with one V-shaped slot. Four V-shaped slots are distributed on each ridge waveguide section, 64 I-shaped coupling slots are formed in the slot coupling layer, the I-shaped coupling slots are located under the ridge waveguide sections, and the feed network layer adopts a flattened narrow-edge ridge waveguide design. Comprising a five-order one-to-two ridge waveguide power divider, a ridge waveguide-to-common waveguide converter, a multi-branch waveguide impedance transformer and an E-plane T-shaped joint. The antenna has the beneficial effects that the antenna is light in weight and low in profile; the antenna bandwidth is improved; the antenna structure is simple.

The application discloses a miniaturized broadband folded dipole base station antenna and relates to the technical field of base station antennas.The miniaturized broadband folded dipole base station antenna comprises a metal reflecting plate, a dielectric plate, a support column assembly and a feed point, the dielectric plate is fixed on the metal reflecting plate through the support column assembly, the surface of the dielectric plate is printed with a microstrip line assembly in the shape of a whole rectangular ring, and the feed point is arranged on the microstrip line assembly and serves as a simulation port of simulation software.The antenna profile height and cross-sectional area are reduced, and the antenna bandwidth is improved through mode fusion and microstrip line coupling.

The invention discloses a low-profile ultra-wideband patch antenna based on hybrid electromagnetic coupling. The low-profile ultra-wideband patch antenna comprises a dielectric substrate, a metal floor, a feed column, a magnetic coupling parasitic patch, a main feed half-mode patch and an electric coupling parasitic patch, wherein the magnetic coupling parasitic patch, the main feed half-mode patch and the electric coupling parasitic patch are arranged in sequence; the feed column directly feeds power to the main feed half-mode patch, the magnetic coupling parasitic patch is directly connected with the main feed half-mode patch, and a row of short circuit columns connected with the metal floor are arranged at the connection position of the magnetic coupling parasitic patch and the main feed half-mode patch. The magnetic coupling parasitic patch is loaded on the short-circuit edge of the main feed half-mode patch, namely the position with the largest magnetic field, and the electric coupling parasitic patch is loaded on the open-circuit edge of the main feed half-mode patch, namely the position with the largest electric field. And the antenna forms an overall layout in which the three half-mode patches are connected in a mixed coupling form. According to the layout, two parasitic patches of magnetic coupling and electric coupling are introduced into the same structure, so that a patch antenna in a mixed coupling form is realized, and the bandwidth of the antenna is expanded.

The invention provides a moving and standing wave electrode composite loading microwave photon receiving antenna and a signal receiving method thereof.The antenna comprises a dual-band combined plane patch antenna and a lithium niobate film moving and standing wave electro-optical modulation chip, a high-frequency antenna and a moving wave electrode are mutually connected through gold wire bonding, and a low-frequency antenna and a standing wave electrode are mutually connected through gold wire bonding; and a single beam of light wave is modulated by the two electrodes in sequence by using a cascade light path. The signal receiving method comprises the steps of light wave injection, dual-band signal induction and loading, sequential modulation based on the lithium niobate electro-optical effect, photoelectric conversion and signal extraction. Through the traveling wave and standing wave electrode composite loading and optical domain modulation mechanism, the bottleneck that the bandwidth of a traditional antenna is limited by impedance matching is broken through, high-sensitivity receiving is achieved within the ultra-wide band of 10 MHz to 20 GHz, and meanwhile the ultra-wide-band antenna has the advantages of being compact in structure and high in electromagnetic interference resistance and is suitable for ultra-wide-band weak field detection and high-precision electromagnetic signal receiving.

An electrically small antenna system modulates the Q factor of the antenna during electrical transmission to decrease the Q factor during signal transitions between frequency states thereby affecting an improved trade-off between antenna bandwidth and operating efficiency.

The application provides a broadband wide-angle scanning microstrip antenna unit structure and an antenna array. On the basis of ensuring a low profile of the antenna, the broadband wide-angle scanning capability of the microstrip patch antenna is realized through structural design, meanwhile, space is reserved as a design area of an optical radar, and an antenna unit for integrated design of an optical / electrical radar array is realized. Technical problems that the antenna bandwidth is narrow in the prior art, and the profile, volume and weight of the antenna affect the performance of the radar are solved.

The scheme discloses a POS machine miniaturization large-bandwidth high-efficiency antenna, which uses a small antenna size to excite a low-frequency working mode of a mainboard, uses components such as a camera FPC and an NFC coil which are not conducive to the antenna to expand the frequency, realizes better low-frequency bandwidth, changes the disadvantage into an advantage, optimizes the shape of the antenna working at a high frequency and places the antenna at a suitable position to excite the NFC coil and the rear camera FPC to generate a low-frequency resonance, thereby expanding the antenna bandwidth to a low frequency enough to cover common low-frequency communication frequency bands, and finally realizes a very small space-occupied and very high-efficiency large-bandwidth antenna.

The invention discloses an underground target positioning method and device based on L-shaped antenna array space sampling, and belongs to the technical field of ground penetrating radars. According to the method, a one-transmitting-multiple-receiving L-shaped antenna array is adopted to move at a constant speed in the scanning direction, and echo signals of multiple positions are obtained through continuous space sampling; performing two-dimensional direction of arrival estimation on each sampling point to obtain a parallel direction angle and an orthogonal direction angle of the target; angle change curves of different targets are separated through angle calibration and data association processing; and finally, fitting an angle change rule based on a genetic algorithm, and inverting a three-dimensional coordinate of the underground target. The method overcomes the contradiction between the resolution and the signal bandwidth of a traditional ground penetrating radar, reduces the dependence on the antenna bandwidth and the system hardware, achieves the high-precision and low-cost three-dimensional positioning of the dot frequency signal for multiple targets, and is suitable for the fields of geological exploration, road detection, underground pipeline detection and the like.

The invention discloses a radiation and scattering integrated microstrip antenna based on an artificial magnetic conductor, and belongs to the technical field of microwave antennas. The antenna comprises a microstrip antenna, four first artificial magnetic conductor (AMC) arrays and four second AMC arrays, the microstrip antenna is located in the center, and the four first AMC arrays and the four second AMC arrays are distributed on the periphery in a chessboard structure mode. Compared with the original microstrip antenna, the radiation-scattering integrated microstrip antenna based on the artificial magnetic conductor has the advantages that the antenna bandwidth is basically unchanged, the gain of the antenna is improved, and the radiation performance of the original radiation antenna is not influenced; the RCS of the antenna is effectively reduced in a broadband, the overall profile is low, and the antenna can be used in the fields of modern wireless communication systems, electronic reconnaissance and confrontation and the like.

This invention relates to the field of millimeter-wave radar and discloses a millimeter-wave antenna. The millimeter-wave antenna of this invention includes a feed line and multiple antenna elements connected to the feed line. The multiple antenna elements include a feed-end antenna element and a terminal antenna element connected to the feed line's feed end and end, as well as one or more trapezoidal antenna elements. The millimeter-wave antenna of this invention has a wide antenna bandwidth; the antenna linear arrays can be very close together, which is beneficial for selecting smaller element spacing during antenna linear array layout design. Furthermore, when forming a planar array, reducing the spacing between adjacent antenna linear arrays can reduce the lateral dimension of the antenna planar array.

This invention relates to the field of dual-polarized antenna manufacturing technology, specifically to an easily fed broadband dual-polarized reconfigurable transmission antenna array, comprising: a feed antenna, a DC bias network, and two or more dual-polarized reconfigurable elements. Each dual-polarized reconfigurable transmission antenna element is formed by two identical reconfigurable transmission elements orthogonally arranged on the same plane. Each reconfigurable transmission element contains two linearly polarized dipoles arranged in the same direction, forming a receiving and transmitting structure consisting of an active receiving dipole and a passive asymmetric transmitting dipole. The two dipoles are separated by a common ground point and connected by a metallized via. A dipole is connected in parallel next to each dipole element as a passive parasitic bypass to extend the antenna bandwidth. The receiving dipole integrates two pin diodes.

The application discloses an electronic device, and relates to the technical field of antenna design, which comprises a processor, an acoustic device, an antenna and a resonance module. The antenna comprises a radiation branch and a resonance branch. When a feed line transmits a current through a feed end of the antenna, two electromagnetic waves with different phases are generated on the antenna. One of the electromagnetic waves is generated by the current passing through the feed end and the radiation branch, and the other electromagnetic wave is generated by the current passing through the feed end, the resonance module, the resonance branch and the radiation branch. Therefore, the phases of the two electromagnetic waves are different, two resonances are generated, and the bandwidth of the antenna is expanded. Finally, on the basis of guaranteeing the wireless performance of the electronic device, the high requirement of the electronic device assembly process caused by the influence of the acoustic device on the antenna bandwidth can be relatively reduced.

The utility model relates to a middle frame assembly and electronic equipment, and the middle frame assembly comprises a middle frame and a first compensation circuit, the middle frame comprises a supporting part and a frame surrounding the supporting part, the frame is provided with a breaking joint, the frame located at one side of the breaking joint forms a first antenna radiator, and the first antenna radiator has a plurality of working frequency bands; the first end of the first compensation circuit is grounded, the second end of the first compensation circuit is connected with the first antenna radiator, and the first compensation circuit is configured to be used for improving the radiation efficiency of a target frequency band in the multiple working frequency bands of the first antenna radiator. Therefore, the antenna performance of the electronic equipment can be improved, the mode of improving the radiation performance of the target frequency band by changing the size of the frame structure is replaced, the production period of the electronic equipment is shortened, and the production efficiency of the electronic equipment is effectively improved. In addition, due to the arrangement of the first compensation circuit, the antenna bandwidth of the electronic equipment can be widened, and the antenna performance of the electronic equipment is further improved.

The invention discloses a circularly polarized phased-array antenna unit and an antenna array, and belongs to the technical field of antennas. The circularly polarized phased-array antenna unit comprises a first substrate layer, a second substrate layer, a fourth substrate layer, a fifth substrate layer and a fourth metal ground layer which are arranged in sequence; parasitic patches, radiation patches and bridge strip lines are laid on the first substrate layer, the second substrate layer and the fourth substrate layer respectively. The bridge strip line is electrically connected with the radiation patch through the L-shaped feed probe, and the bridge strip line can generate two signals with the phase difference of 90 degrees. The antenna array comprises a plurality of array units in a rectangular array; the array unit comprises four circular polarization phased array antenna units, and the four antenna units are arranged in an annular array. According to the invention, the bandwidth of the antenna is expanded, the broadband performance of the antenna is optimized, and the processing cost is reduced.

The utility model relates to the technical field of wireless communication, and discloses a novel wide-frequency-band ceramic antenna. The novel wide-frequency-band ceramic antenna comprises a first ceramic antenna, a second ceramic antenna and a third ceramic antenna which are stacked together from top to bottom and have the same size, the first ceramic antenna and the third ceramic antenna are provided with transmitting and receiving end electrodes and feed electrodes; the first ceramic antenna, the second ceramic antenna and the third ceramic antenna are provided with transverse electrodes and longitudinal electrodes, and the transverse electrodes and the longitudinal electrodes are provided with metal through holes. The first, second and third ceramic antennas are stacked to reduce the antenna volume and reduce the installation difficulty; the first ceramic antenna and the third ceramic antenna are respectively provided with a transmitting and receiving end receiving electrode and a feed electrode, and a plurality of transmitting and receiving end electrodes and feed electrodes are arranged, so that the antenna bandwidth is effectively enhanced, and the radio frequency performance and the frequency band coverage range are enhanced. The metal through holes are additionally formed in the antenna electrode, distributed inductance is increased, the standing wave bandwidth and the gain bandwidth of the antenna are enhanced, and the frequency band coverage range of the antenna is increased. The utility model further discloses a wireless temperature and humidity sensor.