44results about How to "Improve radiation efficiency" patented technology

An ultra-wideband end-fire antenna with a common aperture embedded in a metal carrier includes a metal cavity with a coaxial cable compartment on one side. A radiator module is connected to the bottom of the metal cavity via a radiator fixing slot. The radiator module includes a common aperture antenna substrate. A low-frequency radiator is printed on the side of the common aperture antenna substrate closer to the coaxial cable compartment, and a high-frequency radiator is printed on the side farther from the coaxial cable compartment. This invention utilizes a dual-band antenna in a common aperture design to enhance the channel capacity and anti-fading capability of the communication system. At the same time, by achieving the antenna's carrier conformal characteristics, high isolation, and miniaturization, it enriches the antenna's application scenarios and improves the overall performance of the communication system.

The invention discloses a quasi-single-mode circular waveguide conical horn antenna, a radar and a communication device. The quasi-single-mode circular waveguide conical horn antenna comprises a circular waveguide section and a conical horn section. Conductor loss is reduced by remarkably increasing the diameter of the circular waveguide, and axial periodic annular grooves are formed in the inner wall of the circular waveguide to form a spatial mode filter and a selective attenuation high-order mode, so that high radiation efficiency and high mode purity are realized at the same time in a millimeter wave frequency band. And the conical horn section adopts an index profile to realize high-directionality radiation. The antenna structure effectively solves the technical problems of large loss and impure mode in a millimeter wave high-frequency band in the traditional design.

The application provides an X-band broadband high-gain radar metasurface antenna and a design method thereof. The metasurface antenna comprises, from top to bottom, a metasurface layer, an intermediate metal layer and a lower microstrip feed line layer. The metasurface layer comprises at least one metasurface unit. An asymmetric chamfer structure is designed on each metasurface unit. A center fork-shaped slot is arranged at the center of each metasurface unit, and four embedded parasitic branches are arranged at four side edges, respectively. Rectangular coupling slots corresponding to each metasurface unit are arranged on the intermediate metal layer. Feed lines corresponding to each metasurface unit are arranged on the lower microstrip feed line layer. The design method provided in the application can improve the design efficiency.

This utility model discloses a WLAN antenna structure and a microcomputer, relating to the field of antenna technology. The WLAN antenna structure includes an antenna unit, which includes a dielectric substrate, an antenna ground plane, and radiating stubs. The radiating stubs are connected to the antenna ground plane, and the radiating stubs and the antenna ground plane are located on the same side of the dielectric substrate. The antenna unit is disposed in the microcomputer with the motherboard spaced apart and isolated from each other, and is connected by a feed line.

The application relates to the technical field of circularly polarized antennas, and discloses a small-sized circularly polarized reconfigurable metasurface antenna for assisting satellite communication, which is provided with a dielectric layer provided with a plurality of metal through holes, metal resonance structures arranged on the upper and lower surfaces of the dielectric layer and a metal ground plate; the metal resonance structure comprises a plurality of metaline units arranged in a periodic mode along a horizontal direction, each metaline unit comprising: an upper metal stub, a metal main arm and a lower metal stub arranged in a sequential mode along a vertical direction; a first PIN diode is connected with the metal main arm at a positive electrode and connected with the upper metal stub at a negative electrode; a second PIN diode is connected with the lower metal stub at a positive electrode and connected with the metal main arm at a negative electrode; and the metal ground plate is connected with the metal stubs of the metal resonance structure through the metal through holes. PIN diodes are integrated between the metal main arm and the two side grounding metal stubs, the on and off states are switched by controlling the bias voltage, and the polarization direction is adaptively adjusted.

The invention relates to a three-dimensional ultra-wideband Vivaldi antenna, and belongs to the technical field of electromagnetic fields and microwaves. The antenna is expanded in the H-plane direction, and a traditional planar antenna is converted into a three-dimensional antenna, so that the radiation aperture area of the antenna is effectively increased, and the radiation efficiency of the antenna is improved. The antenna comprises a feed structure and a double-radiation structure, the feed structure is composed of a coaxial line, a microstrip line and two microstrip line-to-parallel double lines, and the double-radiation structure is composed of two Vivaldi antennas which are the same in shape and are in mirror symmetry. Under the condition that the size of the E surface of the antenna is kept unchanged, the radiation aperture area is increased through the three-dimensional design, the radiation efficiency of the antenna and the aperture utilization rate of the array antenna are effectively improved, the technical problems that a traditional planar Vivaldi antenna is low in radiation efficiency, and the aperture is wasted during array application are solved, and the antenna is suitable for large-scale popularization and application. And miniaturization of the array antenna can be realized to a certain extent. In addition, the antenna structure form has high universality and can be suitable for antennas in other forms.

The utility model provides a high-performance terminal antenna and a mobile terminal device, the high-performance terminal antenna comprises a first radiation antenna and a second radiation antenna, and the first radiation antenna and the second radiation antenna are mutually coupled and connected to form a coupling gap. The first radiating antenna comprises a first antenna branch knot, a second antenna branch knot, a third antenna branch knot and a feeding point which are connected in sequence, and the feeding point is electrically connected with the first antenna branch knot; the second radiating antenna comprises a grounding point and a fourth antenna branch knot, and the grounding point and the feeding point are arranged on the two sides of the coupling gap respectively. According to the high-performance terminal antenna of the utility model, not only can the main branches extending the radiation area be mutually coupled, but also the overall radiation frequency and radiation efficiency of the antenna can be effectively improved.

The invention discloses a miniaturized ultra wide band antenna, a UWB positioning terminal and a positioning method thereof. The antenna comprises a dielectric substrate, a radiation unit, a grounding plate and an excitation source, wherein the radiation unit, the grounding plate and the excitation source are stacked on the same outer surface of the dielectric substrate; the grounding plate and the radiation unit are arranged at intervals; the excitation source is arranged between the radiation unit and the grounding plate, and is electrically connected with the radiation unit and the grounding plate. The grounding plate and the radiation unit form a radiation loop, a first ultra-wideband pulse electric signal generated by the excitation source is converted into a first electromagnetic pulse signal, and the first electromagnetic pulse signal is emitted to the space; and a second electromagnetic pulse signal reflected by the positioning target in the space is converted into a second UWB pulse electric signal and the second UWB pulse electric signal is transmitted to the excitation source, so that the UWB positioning terminal obtains the positioning information. The antenna is compact in structure and low in cost, the optimal balance among the size, the cost and the regulation compliance is ensured, and the UWB terminal equipment is promoted to develop in a more compact, more economical and more compliant direction.

The application discloses a copper film structure and a transparent antenna. The copper film structure comprises a copper foil substrate layer, a first blackening layer and a second blackening layer. The copper foil substrate layer comprises a first surface and a second surface arranged oppositely. The first blackening layer is formed on the first surface and is arranged to reduce the gloss of the first surface, so that the gloss of the first surface is reduced to less than a preset gloss value. The second blackening layer is formed on the second surface and is arranged to reduce the gloss of the second surface, so that the gloss of the second surface is reduced to less than the preset gloss value. The technical scheme can effectively improve the problem that the existing transparent antenna is difficult to balance between high conductivity and low visual visibility.

The invention provides electronic equipment and an antenna control method thereof, and relates to the field of communication, antennas are arranged on a frame and a rear cover, and antenna switching can be formed in a scene of switching a horizontal screen state and a vertical screen state, so that sufficient antennas can meet communication requirements in multiple scenes, and the communication quality of the electronic equipment in different use scenes is improved.

The application discloses a planar vortex orbit angular momentum antenna based on artificial surface plasmons. The application comprises a resonant antenna and a feeding system; the resonant antenna comprises an artificial surface plasmon metal ring and a first dielectric plate; the feeding system comprises a second dielectric plate, an air dielectric layer, a metal ground, a third dielectric plate and a feeding network; two microstrip stubs are arranged on the third dielectric plate, and a small metal disc is arranged at the end of each microstrip stub; the microstrip stubs are connected with the feeding network through metal vias; the surface impedance of the slotted unit of each artificial surface plasmon unit in the artificial surface plasmon metal ring is the same or different. The application can emit a vortex wave beam carrying a precisely defined orbit angular momentum on a plane, and through synthesizing multiple wave beams at a fixed frequency, the multiple wave beams can be superimposed to form a new wave beam, so that the shape of the wave beam can be controlled. The wave beam scanning can be realized by adjusting the surface impedance distribution of each wave beam.

The invention provides intelligent glasses and a communication method thereof, and relates to the technical field of wearable equipment. The smart glasses include a frame, legs extending from the frame, a first antenna, a second antenna, a multiple-input multiple-output antenna, and a processor. The first antenna is arranged on the mirror frame, and the first antenna carries out communication on the L1 frequency band of the GPS frequency. The second antenna is arranged on the mirror frame and is separated from the first antenna, and the second antenna carries out communication on the L5 frequency band of the GPS frequency. The multiple-input-multiple-output antennas are arranged at the ends of the glasses legs, and the processors are arranged at the positions, close to the glasses frame, of the glasses legs and are connected with the first antennas, the second antennas and the multiple-input-multiple-output antennas respectively. According to the intelligent glasses disclosed by the invention, a high-precision positioning and navigation system which can be applied to a global satellite navigation system is realized, and the accuracy and the safety of the positioning system are improved.

The invention discloses a metal package capable of simultaneously improving the heat dissipation capability of a chip and the gain of a back-fire antenna on a terahertz chip, and the metal package comprises a top dielectric layer, a first metal layer, a second metal layer, a bottom dielectric layer and a third metal layer which are sequentially stacked from top to bottom, four bent transmission lines adopting 0-degree / 0-degree / 180-degree / 180-degree phase excitation are integrated; the second metal layer is a reflecting layer, and four strip-shaped gaps corresponding to the feed transmission lines are etched in the second metal layer; the third metal layer is a guide layer and comprises a metal plane and ten metal columns extending downwards. Through the multi-layer metal packaging structure, on the premise that the aperture of the chip is not increased, the gain and the radiation efficiency of the antenna are effectively improved, the working temperature of the chip is reduced, and the antenna is suitable for an integrated on-chip system of a terahertz frequency band.

The invention relates to the technical field of terahertz communication, in particular to a terahertz radiation source SiP module and a design method thereof, and the terahertz radiation source SiP module comprises a packaging shell, a built-in power amplifier chip, a packaging substrate, a metal micro coaxial feed network and an antenna array. The feed network is integrated in an antenna array and is composed of a plurality of stages of T-shaped micro coaxial power dividers, and a part of ports are provided with two impedance conversion structures, so that broadband impedance matching within a 110-170GHz frequency band is realized. The output end of the power amplifier chip is connected with the input end of the feed network through the packaging substrate, the broadband radiation unit of the antenna array is in butt joint with the output port of the feed network, and amplified terahertz signals are radiated to a free space. The module optimizes the performance through integrated design, is suitable for high-frequency terahertz communication and detection scenes, and has the characteristics of compact structure, wide frequency band and high efficiency.

The application provides a hierarchical structure heat management fiber film integrated with a phase change core layer and a burr skin layer and a preparation method thereof, and the hierarchical structure heat management fiber film comprises the phase change core layer and the burr skin layer wrapped outside the phase change core layer, wherein the burr skin layer comprises PAN fibers and ZnO nanorods grown on the surfaces of the PAN fibers, and the phase change core layer comprises a PVDF hydrophobic sacrificial framework and PEG phase change materials carried on the PVDF hydrophobic sacrificial framework. By constructing a rough burr skin layer with a diffuse reflection characteristic, the risk of rupture of a smooth core-shell structure in a thermal cycle is avoided, and efficient cooperation of radiation heat dissipation and latent heat buffering is achieved.

This invention discloses an X-band direction-finding antenna and antenna device. The antenna includes an array layer, a cavity layer, and a network layer stacked sequentially from front to back. An antenna array is disposed on the array layer, and an array port is disposed on the antenna array. The array port is connected to the network layer and an output terminal disposed on the antenna through the cavity layer. The antenna device includes an antenna and an antenna support, with the antenna disposed on the antenna support. This X-band direction-finding antenna has a high degree of integration, small size, and light weight, achieving miniaturization. Simultaneously, it exhibits a low standing wave ratio and high element radiation efficiency in the X-band.

The invention provides a circularly polarized antenna and Internet of Things equipment. The circularly polarized antenna comprises an antenna radiator, a feed wire, a first fixing structure and a second fixing structure. According to the circularly polarized antenna disclosed by the invention, the circularly polarized wave can be effectively generated through the frame body, the first branch knot and the second branch knot in the antenna radiator, so that the problem of polarization mismatch is reduced, and the signal receiving quality and the system communication efficiency are improved. The feed wire and the antenna radiator are matched with a proper projection coincidence area, and an air coupling feed mode is adopted to transmit energy to the antenna radiator, so that efficient signal transmission and excellent circular polarization characteristics of the circularly polarized antenna are realized. In addition, circularly polarized waves are realized through the structural design of the antenna radiator and the feed wire, so that the circularly polarized antenna is small in size, high in gain and easy to conform.

The present application relates to whip antenna technical field, specifically to carbon fiber whip antenna structure and forming method. The existing carbon fiber whip antenna conduction performance is poor, the resistance value is large, the radiation efficiency is low. The carbon fiber whip antenna structure includes first metal joint, carbon fiber tube and second metal joint and the conductive wire connecting two metal joints. Its forming method is that the first metal joint and the second metal joint are installed at both ends of the mold; carbon fiber prepreg is laid; the conductive wire is wound; carbon fiber prepreg is laid again; the antenna outer surface is wrapped with metal mesh; the metal mesh is wound and fixed with the conductive wire; the connecting part of the metal mesh and the first metal joint and the second metal joint is wound with carbon fiber prepreg respectively; compaction and solidification; demolding. The carbon fiber whip antenna has good conduction performance, small resistance value, high resistance radiation efficiency, light structure quality, excellent mechanical properties, fatigue resistance, corrosion resistance, large power bearing, high radiation efficiency, long service life, high efficiency of the workpiece.

The invention provides an electronic device. The electronic equipment comprises a front shell, a floor and an antenna assembly, the front shell comprises a frame part, the floor comprises a first edge and a second edge which are connected in a bending manner, the antenna assembly comprises a first antenna, and the first antenna comprises a first radiator and a first feed source; at least part of the first radiating body is arranged corresponding to the long side of the floor, the first radiating body comprises a first main radiating body and a first parasitic radiating body, the first main radiating body comprises a first end, a first feeding point and a first coupling end which are arranged in sequence, and the first parasitic radiating body comprises a second coupling end and a second end which are arranged in sequence; the first main radiating body and the first parasitic radiating body are positioned on the frame part; the first feed source is electrically connected to the first feed point, excites a first resonant mode to support a first sub-band of a first target band, and a second resonant mode to support a second sub-band of the first target band, the first resonant mode including a parasitic mode of the first parasitic radiator, and the second resonant mode including a zero-order mode of the floor.

This invention belongs to the field of ultrasonic sensing and microelectromechanical systems (MEMS) packaging technology, specifically relating to a multi-segment acoustic packaging structure and optimization method for a PMUT ultrasonic transducer. The multi-segment acoustic packaging structure for a PMUT ultrasonic transducer includes a base, a PMUT chip, and an acoustic cavity. The acoustic cavity includes a front cavity section, a tapered transition section, a conduit section, and a waterproof and acoustically permeable membrane. A first minimum gap is formed between the radiating surface of the PMUT chip and the bottom surface of the front cavity section; a second minimum gap is formed between the waterproof and acoustically permeable membrane and the outlet end of the conduit section. Furthermore, the acoustic cavity serves as either a transmitter or a receiver. When used as a transmitter, the depth of the front cavity section is greater than that of the front cavity section when used as a receiver, and the inner diameter of the conduit section is smaller than that of the conduit section when used as a receiver. This packaging structure, through optimization of geometric parameters and acoustic characteristics, achieves differentiated performance improvements for the transmitter and receiver, increasing the transmitted sound pressure and directivity, and expanding the bandwidth and receiving angle of the receiver.

The application discloses a polarized direction adjustable electromagnetic pulse directional radiation system, which comprises a movable rotating support, a directional radiation line grid antenna and a high-voltage differential pulse source. The directional radiation line grid antenna comprises an upper line grid, a lower line grid, an upper edge roll, a lower edge roll, a loading loop and a load resistor. The input ends of the upper line grid and the lower line grid are respectively connected to the upper differential output electrode and the lower differential output electrode of the high-voltage differential pulse source, the output end of the upper line grid is connected to the upper edge roll, the output end of the lower line grid is connected to the lower edge roll, one end of the loading loop is connected to the upper edge roll through an upper adapter plate, and the other end of the loading loop is connected to the lower edge roll through a lower adapter plate. The load resistor is arranged on the loading loop. The directional radiation line grid antenna is arranged on the movable rotating support, and the directional radiation line grid antenna can rotate with the rotating shaft as the center. The system has high radiation efficiency, the polarized direction is adjustable, and a polarized direction adjustable electromagnetic pulse radiation environment can be generated.

The application provides an antenna structure and a wireless communication device with the antenna structure. The antenna structure comprises a first substrate, a second substrate, at least one first radiation unit, a feed source and a ground plane. The first substrate is bent to form a receiving space for receiving the second substrate. The feed source is arranged on a first surface of the second substrate, the ground plane is arranged on a second surface of the second substrate, and the at least one first radiation unit is arranged on an upper surface of the first substrate. The feed source is electrically connected to the at least one first radiation unit to feed the first radiation unit with an electrical signal, and the ground plane is electrically connected to the at least one first radiation unit to provide the first radiation unit with a ground. The antenna structure provided by the application has higher antenna gain and can meet the design requirements of antenna operation.

The utility model discloses a kind of cascaded antenna device and radar.The cascaded antenna device includes waveguide feed layer, waveguide wiring layer and slit radiating layer;Waveguide feed layer includes at least two interface regions, several waveguide interfaces are provided in each interface region, and waveguide interface penetrates waveguide feed layer;Waveguide feed layer is provided with at least two waveguide chips on the side away from waveguide wiring layer, and one waveguide chip corresponds to one interface region, and at least two waveguide chips are cascaded by power divider;Slit radiating layer includes several radiation slits, and each radiation slit penetrates slit radiating layer;Waveguide interface and radiation slit one-to-one correspond;Several propagation paths are formed on waveguide wiring layer, and one propagation path is used to connect one waveguide interface and its corresponding radiation slit.The cascaded antenna device provided in the scheme is simple in process, low in cost, flexible in layout, and has the advantages of multi-channel, large aperture, high radiation efficiency, etc., to provide the basis for improving environmental perception effect.

The invention relates to the technical field of rectangular waveguide slot antennas, and particularly discloses an I-shaped slot radiation antenna based on electromagnetic metamaterial design. Comprising a rectangular waveguide with a cavity, electromagnetic metamaterial structures which are arranged in the cavity and are axially and symmetrically arranged along the length direction of the rectangular waveguide, and an I-shaped gap which is arranged on the upper surface of the rectangular waveguide and is communicated with the cavity; the thicknesses of the two groups of electromagnetic metamaterial structures are axially increased along the length direction of the rectangular waveguide; and the I-shaped slot is arranged on one side of the metal short circuit surface close to the rectangular waveguide. One-way transmission is realized by introducing the electromagnetic metamaterial, the working bandwidth, the radiation efficiency and the gain of the rectangular waveguide slot antenna are improved by combining the I-shaped slot, and the standing-wave ratio is reduced.

The present disclosure relates to a middle frame assembly and an electronic device, the middle frame assembly comprising a middle frame body and a tuning circuit, the middle frame body being provided with at least two adjacent antenna branches, a gap being provided between the adjacent antenna branches, the tuning circuit being provided at the gap and connected to the two adjacent antenna branches; wherein at least one of the two adjacent antenna branches operates in a traveling wave mode, and the tuning circuit is used for transmitting electromagnetic waves between the two adjacent antenna branches, so that one of the two adjacent antenna branches acts as a magnetic parasitic branch of the other antenna branch. The present disclosure connects the two adjacent antenna branches by providing the tuning circuit at the gap, transmits electromagnetic waves between the antenna branches, configures the two adjacent antenna branches as a magnetic parasitic mode in the same direction, generates a superimposed magnetic field in the same direction, and thus improves the radiation efficiency of the antenna.

This disclosure relates to an antenna structure and an electronic device. The antenna structure includes: a first radiator for radiating satellite frequency band signals; a second radiator, perpendicular to the extension direction of the first radiator, for radiating cellular frequency band signals; a third radiator, which forms a gap with the end of the second radiator away from the first radiator, for radiating both satellite frequency band signals and cellular frequency band signals; and a first antenna switch, one end of which is grounded and the other end electrically connected to the end of the second radiator away from the third radiator; wherein, when the third radiator operates in satellite frequency band signal mode, the feed point of the second radiator switches to an off state, the first antenna switch switches to an on state, and the second radiator and the third radiator couple to generate resonance.

The utility model relates to the technical field of concrete brick production, in particular to a curing kiln supporting rapid hardening treatment, which comprises a curing kiln main body, an axial flow fan and a stainless steel heat preservation shell, a curing cavity is arranged in the curing kiln main body, and a cover plate covers the top of the curing kiln main body. A stainless steel heat preservation shell is arranged on the outer side of the curing kiln body, external connection frames are arranged on the two sides of the stainless steel heat preservation shell, axial flow fans are embedded in the inner sides of the external connection frames, and the outer sides of the axial flow fans are covered with filtering and adsorbing nets. Carbon fiber radiant panels are symmetrically arranged on the top wall of the curing cavity, a high-pressure rotational flow atomizing nozzle is arranged at the middle end of the top wall of the curing cavity, and a motor box is arranged at the bottom of the curing kiln body. The problems that in the prior art, an existing curing kiln is low in temperature and humidity control precision, long in hardening period, high in energy consumption and the like are solved, and the requirement for rapid hardening of high-performance concrete products is difficult to meet.

According to the high-isolation antenna array based on the MEMS technology and the preparation method, the characteristic of high processing precision of the silicon-based MEMS technology is utilized, the size of the antenna array is accurately controlled, the performance consistency in the W wave band is ensured, the loss caused by processing errors is effectively reduced, the radiation efficiency and the gain stability of the antenna are improved, and the antenna array is suitable for large-scale popularization and application. The formed antenna array is miniaturized and high in integration level, batch production is facilitated, production cost is reduced, a shielding cavity formed by the third TSV columns and an isolation structure formed by the first TSV columns and the second TSV columns are designed, space coupling of signals in the transmission process from a radio frequency signal line to a feed probe is effectively restrained, and the antenna array is more compact in structure and more compact in structure. The antenna array isolation degree is improved, the performance of the antenna is remarkably improved, the performance deterioration caused by array pattern distortion and cross coupling change during large-angle beam scanning is effectively reduced by optimizing the antenna array layout and the low cross coupling design, a wider scanning angle range is supported, and the space coverage capacity of the antenna array is improved.

The embodiment of the application discloses a waveguide antenna array and a millimeter wave radar, and relates to the technical field of communication. The waveguide antenna array comprises a radio frequency interface layer, a waveguide power division network layer and a radiation layer which are sequentially stacked. The radio frequency interface layer is provided with at least one radio frequency chip interface, the radio frequency chip interface is a transition structure of waveguide to microstrip, the waveguide power division network layer comprises a waveguide power divider in communication with the radio frequency chip interface, and the radiation layer comprises a plurality of radiation antenna units, each of which is provided with a plurality of radiation slots, and the plurality of radiation antenna units are in one-to-one correspondence with the plurality of waveguide branches in communication. In the above manner, the embodiment of the application can realize direct docking between the waveguide antenna array and the radio frequency chip, eliminate the additional loss introduced by the external connector, improve the interface matching and signal transmission efficiency, realize the integration of the waveguide antenna array and the radio frequency chip at the same time, and meet the application requirements of miniaturization and high integration of the millimeter wave radar.