166results about How to "Increase antenna gain" patented technology

The invention provides an ultra-wideband antenna. The ultra-wideband antenna comprises a dielectric substrate, wherein a radiation unit, a feeding structure and a ground plane are printed on the dielectric substrate; the radiation unit is a forked chip; the feeding structure is a coplanar waveguide feeding structure; and the ground plane is a coplanar waveguide ground plane. The ultra-wideband antenna has a coplanar waveguide structure, so that a single planar printed antenna structure can be realized; the ultra-wideband antenna can be easily integrated with a microwave integrated circuit; the coplanar waveguide ground plane can serve as the ground plane of the whole antenna, and particularly for the coplanar waveguide structure with a wideband slot structure, wideband work can be realized, and the electromagnetic interference of outside on the antenna can be effectively avoided; and wideband impedance bandwidth can be easily realized, and the efficiency of the antenna is improved, so that higher antenna gain can be achieved.

In a phase-controlled antenna array for mobile devices, in particular designed for flying device, groups of controllable passive antenna elements are arranged in concentric circles around an active central antenna element. The arrangement of additional similar planar antenna arrays among the original antenna array is especially advantageous with regard to bundling the emission characteristic.

The invention relates to an OAM generator based on a parabolic reflector and a circular-ring-shaped array feed source. The OAM generator shown in the picture (a) is composed of the circular-ring-shaped array feed source, the rotary parabolic reflector and a supporting mechanism. A structure of the circular-ring-shaped feed source is shown in the picture (b) and used for generating an original OAM radio frequency wave beam, N array elements distributed at equal intervals along the circumference are utilized, the stimulation amplitudes of the array elements are equal, and phases are shown in the mode shown in the specifications, wherein n represents the serial number of the array elements, l represents an OAM mode, a spiral phase item in the shape shown in the specifications can be formed in an array factor of the feed source, and an OAM radio frequency wave beam with the pattern number being l can be generated. When the OAM mode of the generator during working needs to be adjusted, only the phase relation among various array element currents needs to be reset. The rotating parabolic reflector is used for improving the quality of the OAM radio frequency wave beam and can narrow the OAM radio frequency wave beam, directionality and radiation gains can be improved, and the transmission distance of an OAM radio frequency carrier is increased. The OAM generator based on the parabolic reflector and the circular-ring-shaped array feed source can be applied to a wireless communication system, and compared with the existing wireless technology, the system capacity and the spectrum effectiveness can be greatly improved.

The invention discloses a high-isolation four-port diversity antenna for mobile communication, which comprises a dielectric substrate, a grounding plane, a feed network, four electromagnetic dipoles, four L-shaped ribbons, four aerial microstrip transmission lines and a vertical copper line, wherein the four electromagnetic dipoles are annularly and evenly arranged on the square grounding place at intervals; one L-shaped ribbon and one aerial microstrip transmission line are arranged in each electromagnetic dipole, and the L-shaped ribbons are connected with the feed network through the aerial microstrip transmission lines; and one end of the vertical copper line is vertical to the center of the grounding plane. According to the invention, in the working bandwidth, the radiation efficiency of four modules all exceed 80 percent; and compared with the major traditional diversity antennas with a boardband mode, the high-isolation four-port diversity antenna can provide a wider radiation range in different polarization modes, thereby greatly improving the system property. In addition, when the high-isolation four-port diversity antenna is used for an array structure, additional angle flexibility can be formed in aspects of wave beam control and wave beam forming.

The invention relates to an antenna array sparse construction and a directional diagram comprehensive method based on quantum bat searching. An overall optimal position of a scattered quantum bat group is obtained based on a quantum bat searching mechanism, and the overall optimal position is mapped as a sparse antenna array. On the basis of a constructed sparse antenna array, an overall optimal quantum position and an optimal mapping position of a continuous quantum bat group are obtained based on the quantum bat searching mechanism. Therefore, the optimal excitation amplitude of the antenna array is obtained.

The invention proposes a multi-layer structure-based millimeter wave array antenna. By the multi-layer structure-based millimeter wave array antenna, the gain is improved, and meanwhile, the miniaturization of the millimeter wave array antenna is achieved. The multi-layer structure-based millimeter wave array antenna comprises (m*n) antenna units, a first dielectric plate and a second dielectric plate, wherein the first dielectric plate and the second dielectric plate are vertically laminated, an internal grounding plate is printed on an upper surface of the first dielectric plate, an externalgrounding plate is printed on a lower surface of the second dielectric plate, (m*n) radiation gaps are etched in the internal grounding plate, the antenna units are fixed on the internal grounding plate and are arranged right above the radiation gaps, a feeding network is arranged between the first dielectric plate and the second dielectric plate and is used for performing coupling feeding on theantenna units, each antenna unit comprises a multi-layer dielectric plate, a metal plate is printed on an upper surface of each layer of dielectric plate, a round opening is formed in a plane centerof each layer of metal plate, and adjacent metal plates are connected via a metal through hole encircling an outer side of the round opening so as to form a round horn structure of which a caliber surface is gradually increased from bottom to top.

The invention provides a cylindrical integrated active phased-array antenna. 96 linear radiation arrays are arranged in parallel to form a cylindrical array phase, each linear radiation array includes 8 radiation units and 8 phase shifters, and wave beam scanning in the pitching surface is realized; and each radiation column is connected with a switch array via a T / R assembly, the switch array divides the 96 linear radiation arrays into four groups, and a power amplifier is connected via an circulator. According to the invention, an independent antenna can be used to realize omnidirectional scanning with neither increase of array planes nor addition of mechanical scanning, the complexity and power consumption of an antenna system are reduced, and problems in heat radiation and the like are solved.

The invention provides a multichannel frequency modulated continuous wave SAR (synthetic aperture radar) imaging method. The technical scheme includes that the multichannel frequency modulated continuous wave SAR imaging method includes transmitting frequency modulated continuous wave signals by a channel and receiving the same by M channels simultaneously, and acquiring M channels of azimuths of undersampled two-dimensional frequency modulated continuous wave SAR echo signals; subjecting the acquired M channels of signals to two-dimensional Fourier transform, performing Doppler defuzzification in a two-dimensional frequency domain and acquiring equivalent single-channel signals eliminating azimuth aliasing; focusing the equivalent single-channel signals in the two-dimension frequency domain to obtain two-dimensional high-resolution frequency modulated continuous wave SAR images. Compared with existing single-channel frequency modulated continuous wave SAR imaging method, the multichannel frequency modulated continuous wave SAR imaging method can be operated in the mode with longer operation distance, wider measuring band width and higher imaging resolution under the condition of same transmission power, and application of the frequency modulated continuous wave SAR is broadened.

A high-gain low-profile null feed array antenna comprises a metal cover plate, a metal side plate, a metal bottom plate and a feed source. The metal cover plate locates at the upper part, the metal bottom plate locates at the lower part and the metal side plate locates at the middle part; the metal cover plate, the metal bottom plate and the metal side plate are connected with each other to form a cavity in which the feed source is arranged; the metal cover plate is a metal flat plate which is provided with a group of gap units arranged periodically; the feed source comprises a feeding patch located in the middle of the housing and a group of passive parasitized patches around; the feeding patch and the parasitized patch are printed on the upper surface of a same dielectric substrate; the lower surface of the dielectric substrate is attached on the upper surface of the metal bottom plate; and the feeding patch is activated by a cable through a radio frequency coaxial joint. The antenna has the advantages of simple feeding, high gain of more than 20dBi, high caliber efficiency of more than 60 percent and low cost.

The invention provides a dual-frequency and dual-polarization common-aperture waveguide horn planar array antenna, which comprises square waveguide horns, waveguide orthogonal mode couplers, antenna units formed by the square waveguide horns and the waveguide orthogonal mode couplers and an arrangement mode of the plurality of antenna units on the plane, and is characterized in that the horn aperture of each square waveguide horn antenna is square in shape, and the structure of each square waveguide horn antenna is a three-layer step transition square pyramid horn; each waveguide orthogonal mode coupler is an orthogonal mode coupler of a longitudinal coning branch structure, a common port of the waveguide orthogonal mode coupler is connected with a waveguide port of the square waveguide horn to form to form a waveguide horn antenna supporting the dual-frequency and dual-polarization common aperture, namely, an antenna unit; and the antenna units are arranged on the plane so as to forma planar array antenna. The planar array antenna manufactured according to the technical scheme provided by the invention has the characteristics of dual frequency, dual polarization and common aperture.

The invention relates to a novel high-performance conformal array antenna, and solves the technical problems of low gain, narrow bandwidth and poor anti-interference capability. The antenna comprisesconformal array antenna units arranged in an array, wherein the conformal array antenna units use a traveling wave antenna feeding structure with two-port feeding, and the size is reduced through thefractal technology, so that the radiation influence of a curved surface on the antenna units is reduced; a slot coupling feed structure is adopted to improve the bandwidth of the antenna units, reducethe surface wave loss of the antenna unit and enable the radiation element to be better isolated from the feed network. A liquid crystal tuning circuit is adopted to apply a liquid crystal material to an antenna unit; the liquid crystal equivalent dielectric constant is changed through electric tuning, so that the resonant frequency of the antenna unit is changed, the radiation characteristic ofthe conformal array antenna unit in a required frequency band is controlled, the contribution of different antenna units to a main wave beam is controlled, the anti-interference capability is enhanced, the problem is better solved, and the conformal array antenna can be used in an antenna.

The invention relates to an X-band satellite-borne phased-array antenna. The X-band satellite-borne phased-array antenna comprises an antenna cover, an installation plate and a plurality of same antenna units, wherein centers of the plurality of antenna units are arranged on the installation plate in an equilateral triangle lattice mode, the antenna cover covers the plurality of same antenna unitsand is fixed with the installation plate, each antenna unit is a multi-layer microstrip antenna and comprises a radiation patch, an antenna unit shell, an SMA coaxial connector, a grounding plate, abottom-layer dielectric plate, an upper-layer dielectric plate and a parasitic patch, an inner core of the SMA coaxial connector sequentially penetrates through the installation plate, the grounding plate and the bottom-layer dielectric layer and is connected with the radiation patch, an outer skin of the SMA coaxial connector is fixedly connected with the installation plate, the installation plate is connected with the grounding plate, the radiation patch is arranged on the center of the bottom-layer dielectric plate, the parasitic patch is arranged in the center of an upper surface of the upper-layer dielectric plate, an air medium is arranged between the bottom-layer dielectric plate and the upper-layer dielectric plate, and the peripheries of the bottom-layer dielectric plate, the grounding plate and the upper-layer dielectric plate are fixed with the antenna unit shell.

A two-frequency one pole antenna includes a microwave base plate, radiation elements and transmission line among which, the radiation elements are composed of a central radiator and several radiationarms, the central radiator generates a resonant modal, the arms generate another resonant modal, thus the said antenna can operate on two different frequencies In actual practice, every radiation armcan be set symmetrically and leaking two corresponding sidewalls of the radiator and electromagnetic coupling efficiency between the arms and the radiator makes the impedance good matching.

A circular polarization antenna includes a substrate, a ground plane, a tuning stub, a feeding element, and a cavity structure. The substrate has a first surface and a second surface. The feeding element is disposed on the first surface of the substrate. The ground plane is disposed on the second surface of the substrate and has a hole. The tuning stub is disposed on the second surface of the substrate and connected to the edge of the hole. The cavity structure is connected to the ground plane and configured to reflect an electromagnetic wave. The circular polarization antenna has higher antenna gain or higher antenna beamwidth.

The invention discloses a display device, a color film substrate, a mobile terminal and a driving method of the mobile terminal. The display device comprises an array substrate, a color film substrate and an antenna device, wherein the color film substrate and the array substrate are arranged oppositely; one side, which faces the substrate array of the color film substrate, is provided with a shielding layer; the antenna device is arranged on one side, which is far away from the array substrate, of the shielding layer. Thus, the antenna device can be integrated on the display device, so that space occupied by the antenna device can be reduced, the overall size of the mobile terminal is reduced, and thinning of the mobile terminal is facilitated.

The invention discloses an azimuthal multi-channel FMCW SAR sliding bunching imaging method. The method comprises: frequency-modulation continuous wave signals are emitted by a channel and the frequency-modulation continuous wave signals are received simultaneously by azimuthal M channels to obtain-path azimuthal under-sampling frequency-modulation continuous wave sliding bunching SAR echo signals; a Deramping operation is carried out on each path of echo data at an azimuth to eliminate a change of a Doppler center with time; azimuth reconstruction is carried out on the M-path echo data after the Deramping operation to obtain one path of echo data; frequency domain zero filling and Ramping operation are carried out on the echo data after azimuth reconstruction to obtain a non-aliasing scene echo signal; and imaging processing is carried out on the obtained non-aliasing scene echo signal to obtain a focused SAR image.

The invention discloses a dual directional antenna self-adaptive alignment communication method, which comprises the steps of: step 1), zeroing an azimuth angle and a pitch angle of a ground directional antenna; step 2), zeroing an azimuth angle of an airborne antenna; step 3), calculating a target angle theta 2a of the azimuth angle of the airborne antenna according to GPS position information of the airborne antenna and the ground directional antenna by means of an airborne antenna control module, and calculating a target angle phi 2a of the azimuth angle of the ground directional antenna and a target angle phi 2p of the pitch angle of the ground directional antenna according to the GPS position information of the airborne antenna and the ground directional antenna by means of a ground antenna control module; step 4), and rotating the airborne antenna by means of an airborne antenna servo module, rotating the ground directional antenna by means of a ground antenna servo module, and completing real-time alignment. The dual directional antenna self-adaptive alignment communication method adopts a precise and convenient calibration mode, improves the tedious and complicated calibration mode of the traditional system, and improves the competitiveness of products from the viewpoints of reliability and cost.

The invention discloses a terahertz wave generator based on graphene. The teraHertz wave generator comprises a substrate, a graphene film and a terahertz photoconductive antenna, wherein the graphene film is formed on the substrate and the terahertz photoconductive antenna is used for coupling Sierpinski fractal geometrical shape of the terahertz wave. According to the invention, bar-shaped electrodes are arranged at the two ends of inverse fractal antenna; a bias voltage is applied between the electrodes; the graphene film is pumped through femtosecond pulse laser; the electron motion in the graphene film is excited; the terahertz wave is irradiated under the effect of the bias voltage; the terahertz wave is coupled with the free space through the photoconductive antenna. Due to the high electronic mobility and the characteristic of easily generating terahertz wave of the graphene and the coupling function of the photoconductive antenna with similar characteristic, the emission efficiency of terahertz wave is increased, the antenna gain is increased, the power consumption and propagation loss of the antenna are reduced and the radiant power of the terahertz wave is increased.

The invention discloses a three-axis stabilized and four-axis tracked shipborne on-the-move antenna which comprises a transverse rolling transmission part, wherein the transverse rolling transmission part comprises a transverse rocking arm, a transverse rolling big belt pulley, a transverse synchronous belt and a transverse rolling small belt pulley, the transverse rocking arm is of an U-shaped beam structure, the U-shaped beam structure comprises a cross beam, the top of a web plate of an U-shaped beam body is provided with a lug in an outward extension way, one end of a transverse rocking arm support is fixedly arranged on a directional rotation support, the other end of the transverse rocking arm support is connected with the cross beam of the transverse rocking arm through a rotation shaft, the transverse rolling big belt pulley is fixedly arranged on the cross beam of the transverse rocking arm, and the transverse rolling big belt pulley and the transverse rolling small belt pulley synchronously and positively / inversely rotate through the transverse rolling synchronous belt to lead the transverse rocking arm to shake from side to side. The rotation of a transverse rocking shaft is added on the basis of the traditional directional, pitching and polarization rotation to lead a boat body to face with composite motion such as rolling, pitching and steering, the composite motion, adaptive to the boat body, of the on-the-move antenna is achieved by the transverse rolling transmission part, and the satellite tracking stability of the shipborne on-the-move antenna during the extreme swinging of the boat body is improved.

The invention discloses a circularly polarized microstrip antenna, and mainly solves the problems that an existing satellite high speed communication antenna is narrow in frequency band, low in gain, and large in size. The circularly polarized microstrip antenna comprises a radiating unit (1), a dielectric lens (2), a support pillar (3), a parasitic patch layer (4), a patch layer (5), a floor layer (6) and a feed network layer (7). The radiating unit (1) is formed by the parasitic patch layer (4) and the patch layer (5), the floor layer (6) and the feed network layer (7) are adhered on the lower portion of the patch layer (5) in sequence, an orthometric double-fed feed unit is arranged at the back face of the feed network layer (7), and the feed unit extends to the right edge of the feed network layer (7)through feeder lines, and is welded with a sub-miniature-A (SMA) coaxial interface to carry out feed. The dielectric lens (2) is fixed above the parasitic patch layer (4) through the support pillar (3). The circularly polarized microstrip antenna has the advantages of being high in gain, wide in frequency band, small in structure, and capable of being used in various mobile communication base stations.

The invention relates to an antenna and a mobile terminal. The antenna comprises at least two antenna units and connecting units, wherein one end of each connecting unit is fixedly connected with the end parts of the antenna units connected with the connecting unit, and the other end of each connecting unit is in sleeve joint with the antenna units connected with the connecting unit. By use of the structural design, when the antenna is in an extending state, as the antenna is provided with the plurality of antenna units and the connecting units are made of an insulating material, the antenna can form an array antenna, and has the maximum polarization format of directivity, higher antenna gain of the antenna maximum polarization direction can be realized than an omnidirectional antenna under the coverage of weak signals. When the antenna is in a retracted state, the plurality of antenna units retract and are electrically conducted to form a small-sized antenna radiator, and at the moment, the antenna is in the format of the omnidirectional antenna, has the omnidirectional gain, and can realize omnidirectional transmitting and receiving under the coverage of strong signals. Therefore, the antenna provided by the invention realizes the compatible design of directional and omnidirectional polarization modes.

The invention discloses a broadband, high-gain and double-slot Vivaldi antenna, which comprises a dielectric plate, a double-slot tapered slot line, edge waves and a feed element, wherein one surface of the dielectric plate is provided with a metal layer as the upper surface; the double-slot tapered slot line is arranged at the upper surface of the dielectric plate and is in an exponential gradient trumpet-shaped opening; the edge waves are arranged on the upper surface of the dielectric plate; and the feed element is arranged on the lower surface of the dielectric plate and is used for feeding the tapered slot line. By the technical scheme disclosed by the invention, the radiation gain of the Vivaldi antenna within a complete working band can be improved.

Multiaerial system is composed of two pieces of plane type monopole antenna and two pieces of plane type inversion F antenna. The inversion F antenna is perpendicular to the monopole antenna. Vertical distance between two pieces of feed line is 15mm. It is 4mm of distance between the feed point of inversion F antenna and central line at Z-axis direction of dielectric plate, where two pieces of monopole antenna and two pieces of plane type inversion F antenna are located at. It is 26mm of distance between upper edge of inversion F antenna and upper edge of T type ground plane. Position of plane type inversion F antenna on the said dielectric plate is located above plane type monopole antenna vertically. Radiating elements in two pieces of plane type inversion F antenna are near to ends of two sides of dielectric plate or folded to T type ground plane. Advantages are: small size, little relativity between antennae, large gain and according with requirement of mobile communication.

The invention discloses a multi-beam phased antenna system, and relates to a beam forming system in the field of microwave communication. The multi-beam phased antenna system comprises an antenna array (M array elements), an N-out-of-M switching assembly, an N-channel filter assembly, an N-channel power amplification / low noise amplification assembly, an N-channel frequency conversion assembly and an N-channel baseband processing assembly. In the system, a planar directional antenna is used for forming a round array, beam forming is carried out by combination of antenna selection, and M beams can be generated to achieve horizontal 360-degree coverage. The multi-beam phased antenna system has the advantages of multi-beam omnibearing coverage, small size, light weight and the function of instant spot beam mutual communication, and is applicably used as an antenna system in microwave communication, and the application demand of a vehicle-mounted, ship-bone or lift-off platform can be met.

The invention relates to an anti-symmetric Vivaldi ground penetrating radar antenna. The anti-symmetric Vivaldi ground penetrating radar antenna comprises a double-surface printed circuit board and a microstrip line arranged on the printed circuit board, the upper surface and the lower surface of the printed circuit board are respectively provided with a lung-lobe-shaped antenna pole in an etched manner, the two antenna poles are arranged in symmetry, an edge of each antenna pole comprises a straight line, a first index gradient curve, a semi-elliptical curve, and a second index gradient curve connected in sequence, end parts of the antenna poles formed by the straight lines and the second index gradient curves are connected with the microstrip line to form a closed loop, and the central frequency of 450 MHz, 470 MHz, or 500 MHz is provided. Compared with the prior art, the anti-symmetric Vivaldi ground penetrating radar antenna is advantaged by ultra wide band and high antenna gain etc., the requirements of the detection distance and the resolution can be satisfied, and the anti-symmetric Vivaldi ground penetrating radar antenna is applicable to nondestructive tests of shield tunnels.

The invention relates to and discloses a hybrid-feeding slot array antenna. A substrate integrated waveguide and a traditional rectangular metal waveguide hybrid feeding mode are employed, a radiationarray is a substrate integrated waveguide slot array, a power division and differential network is of a waveguide single-layer planar structure and is arranged below the radiation array, a feeding port is arranged in a back surface of the antenna, and antenna aperture is not occupied. The antenna has the advantages of high aperture utilization ratio, high grain, relatively wide bandwidth, low profile and the like.

The embodiment of the invention provides an electronic device which comprises a first shell and a second shell, the second shell being connected with the first shell through a rotating piece, and thesecond shell can rotate around the rotating piece relative to the first shell; and at least two first antenna radiators, arranged on the rotating part, positioned on the two sides of the axis of the rotating part and used for transmitting millimeter wave radio frequency signals. When the unfolding state of the first shell and the second shell is smaller than a preset angle, the radiation directions of the at least two first antenna radiators point to at least two different directions. When the unfolding states of the first shell and the second shell are greater than or equal to a preset angle,the radiation directions of the at least two first antenna radiators are the same. The at least two first antenna radiators are arranged on the rotating part, so that the coverage range of antenna radiation beams can be increased, the antenna gain can be improved, the antenna quality can be improved, and the communication stability can be ensured.

The invention relates to an FPGA based real-time imaging signal processing method of an azimuth multi-channel FMCW SAR and an FPGA. The method comprises the steps that 1) a reconstruction matrix is calculated; 2) azimuth multi-channel data is reconstructed; 3) distance migration correction and distance compression are carried out on reconstructed echo data; and 4) azimuth inverse Fourier transform is carried out on the reconstructed echo data to obtain an SAR image. The step 2) further comprises that S2.1) echo data of different channels are zeroized at interval along the azimuth, and azimuth Fourier transform is carried out; 2.2) points in the same position in the azimuth of the different channels after azimuth Fourier transform are combined to a vector, the vector is multiplied by the reconstruction matrix, and azimuth data after reconstruction is obtained; and 2.3) the step 2.3) is carried out repeatedly on data of different range gates to obtain the reconstructed echo data. Thus, the image processing quality can be improved.

The invention relates to a high-gain yagi antenna based on a dielectric resonator high-order mode and a metamaterial. The high-gain yagi antenna comprises a dielectric substrate, a reflector, a feed network, a driving unit and a metamaterial. The driving unit is a rectangular dielectric resonator working in a high-order mode. The meta-material formed by a plurality of mutually parallel long-strip-shaped metal strips is arranged on the upper surface of the dielectric substrate, and the long-strip-shaped metal strips are perpendicular to the driving unit. The feed network is a pair of feed micro-strip lines transitioned from a differential micro-strip line to a coplanar micro-strip line, and excites the dielectric resonator driving unit. Because of the application of the high-order mode TE3delta1 and the loading of the metamaterial, the antenna gain can reach 10.6dBi. The antenna gain can be improved by 2.3dBi by loading the metamaterial. The actual measurement result is well matched with the simulation result.