48results about How to "Narrow beam width" patented technology

A multiple beam antenna system is described. The system may include a mounting structure, a first wireless access antenna, a second wireless access antenna, and a radio frequency lens. The first and second wireless access antennas may be mounted to the mounting structure. Columns of radiating elements of the first and second wireless access antennas may be aligned with the radio frequency lens. The radio frequency lens may be modular in a longitudinal or radial direction, or in both directions. The radio frequency lens may include a plurality of compartments arranged to form a first cylinder made up of concentric, coaxial cylinders and a plurality of dielectric materials in at least some of the plurality of compartments.

A device for detecting an azimuth has a transmission array antenna having plural transmission antenna elements arrayed along an array axis and a receiving array antenna having plural receiving antenna elements arrayed along the array axis. A reception signal is acquired for each of channels by transmitting and receiving a search wave through each of the channels. The channels are arbitrary combinations of each of the transmission antenna elements and each of the receiving antenna elements. A first spatial frequency analysis is performed along the array axis of either ones of the transmission antenna elements and the receiving antenna elements using the reception signal. A second spatial frequency analysis is then performed along the array axis of the other ones of the antenna elements using results of the first spatial frequency analysis. An azimuth of a target is determined based on analysis results from the second spatial frequency analysis.

A pentagonal antenna array having a high aperture efficiency and a suitably high overall gain and low antenna noise temperature. The high aperture efficiency of this antenna system provides an overall system capacity suitable for broadband communication services. The antenna. array consists of five antenna elements each located at a separate vertex of a pentagon. The antenna elements are helical antennas to provide a narrow antenna beam width. The antenna array itself is supported on a base platter which may be steered to point at a satellite using conventional gimbal ring apparatus. The base platter is a planar reflector to reflect the antenna element radiation in the rear direction and thereby reduce the antenna backlobe levels. The input power and the signal transmitted are fed through a phasing / combining network. The phasing / combining network appropriately divides the signal and the input power and phases the signal, prior to feeding the signal to each of the five antenna elements.

The invention discloses an embattling method of logarithmic spiral array antennas. An antenna array uses N logarithmic spirals to embattle; a single logarithmic spiral line function is as follows: r=e, and an antenna unit is displaced on the logarithmic spiral line function r=e, wherein (r, phi) is a position coordinate of any point on the logarithmic spiral line under polar coordinates, r is a distance from the point to an original point (unit: wavelength), namely a relative wavelength number, phi is an angle relative to a polar axis (0 degree), and a is a parameter of the logarithmic spiral line function and is an optimizable constant for designing the array; the antenna unit n on each logarithmic spiral is arranged at the position of phi n along the spiral line function; the phase difference between adjacent units is delta phi; N spiral lines rotate 360 degrees / N rounding a rotating shaft in turn; r of the initial starting point of each logarithmic spiral line is the same; the phase position of the initial starting point of the first starting point on each spiral line is phi0; m array elements are respectively arranged on each spiral line from the initial starting point at an interval of delta phi; one array element can be placed at the center of the array, namely original point, or not; when the parameter a, delta phi and phi0 are determined, an array manifold is determined; and the total antenna unit number of N logarithmic spiral arrays is Nm+1.

A pentagonal antenna array having a high aperture efficiency and a suitably high overall gain and low antenna noise temperature. The high aperture efficiency of this antenna system provides an overall system capacity suitable for broadband communication services. The antenna array consists of five antenna elements each located at a separate vertex of a pentagon. The antenna elements are helical antennas to provide a narrow antenna beam width. The antenna array itself is supported on a base platter which may be steered to point at a satellite using conventional gimbal ring apparatus. The base platter is a planar reflector to reflect the antenna element radiation in the rear direction and thereby reduce the antenna backlobe levels. The input power and the signal transmitted are fed through a phasing / combining network. The phasing / combining network appropriately divides the signal and the input power and phases the signal, prior to feeding the signal to each of the five antenna elements.

This disclosure provides a communication system using a high-altitude aircraft traveling at relatively slow speeds, which can remain airborne for long periods of time. The communication system uses the airplane as a long term high altitude platform that relays signals between one or more ground-stations and / or satellites, aircraft, and the like. The ground-stations have narrow-beam antennas that are aimable, permitting the aircraft to maintain a larger station than would otherwise be possible using the narrow-beam antennas. The ground-stations adjust their aim based on information either gained by tracking the aircraft's signal, or transmitted by the aircraft to the ground-station.

A dual-band antenna system configured to transmit and / or receive microwave beams over two or more frequency bands with substantially similar beam widths and substantially similar sidelobe levels is disclosed. The antenna system includes at least one reflector and at least one feed horn, the horn configured to provide a first efficiency over a first frequency band and lower efficiencies over one or more second frequency bands. The horn includes a substantially conical wall having an internal surface with a variable slope. The internal surface includes one or more slope discontinuities, wherein the slope discontinuities are configured to generate primarily TE1,m modes within the first frequency band and within the second frequency bands and generate TM1,n modes substantially only within the second frequency bands.

A patch antenna is provided with a metallic wall (1); a patch conductor (4) formed on a printed board (2), i.e., a dielectric substrate, by etching or the like; and a power feeding means for the patch conductor. The metallic wall (1) is bent forward along the both side surfaces of the printed board (2). The metallic wall (1) is inclined inward, and an interval between the both end portions is smaller than a radiation aperture dimension of the patch antenna when viewed from an antenna radiation direction. With such configuration, a directional beam width can be widened, and the directional beam width on a surface parallel to the polarization surface of linearly-polarized wave and the directional beam width on a surface orthogonally intersecting with the polarization surface of the linearly-polarized wave are accorded with each other.

The invention discloses a space-based step frequency time-sharing angle measurement radar spatial non-cooperative target imaging method. Aiming at the problem of high-resolution imaging of a spatial high-speed non-cooperative target through a space-based step frequency time-sharing and difference angle measurement radar, by reasonable radar parameter design and signal flow design, a target tracking algorithm is embedded in an imaging algorithm, the time-sharing sum / difference narrow beam radar two-dimensional tracking imaging function can be realized by utilizing a set of transmitting signal timing sequence, and the imaging of a space target beyond the range of radar beams in the imaging process is realized.

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 provides an antenna array and an antenna. The antenna array comprises first column elements and second column elements which are arranged side by side. The first column elements comprise at least one first radiation unit. The second column elements comprise at least one second radiation unit. The antenna array also comprises at least one microwave network. The microwave network is provided with two input port and two output ports. The two input ports are mutually isolated and accessed to a feed phase shift network. The two output ports are respectively connected with the first and second radiation units in the same horizontal direction, and the signals of which the range of the phase difference value is between + / -45 degrees can be outputted to the first and second radiation units at the two output ports when the electric signals are inputted from any one input port of the microwave network. With application of the scheme, narrowing of wave beam width can be realized when the physical size of the antenna is narrowed so that the gain of the antenna can be enhanced, and the miniaturization design of the antenna can be realized.

This invention relates to a monolithic folded F-P cavity used for semiconductor laser, which is composed of a monolithic optical element. The monolithic optical element is made of the material having low propagation loss for a certain spectrum range. Light entering through an input / output coupling surface of the monolithic optical element is reflected several times between the input / output coupling surface and at least two high reflection surfaces within the monolithic optical element, and then at least one part of the light exits through the input / output coupling surface along the path which is collinear with the incident light but in an opposite direction. By means of integrating reflecting and coupling parts of the folded F-P cavity within a single monolithic optical material, this invention greatly improves the reliability of the F-P cavity, and has other advantages, such as insensitive to outside interferences, smaller size, simpler structure and easy usage. A semiconductor laser using the monolithic folded F-P cavity is also provided.

The invention discloses a two-dimensional millimeter wave circularly-polarized wide-angle scanning phased-array antenna, and relates to the technical field of millimeter wave antennas. According to the technical scheme, an antenna radiation patch is connected with a rectangular parasitic patch through a high impedance matching microstrip line which is provided with a cross-carved equal length in the center and is used for carrying out impedance matching on the antenna, and a windmill-shaped microstrip radiation patch excitation equal-amplitude in-phase polarization orthogonal degenerate mode is manufactured on the symmetric center of a diagonal bisector of the corner of the antenna radiation patch; feed probes penetrate through the antenna dielectric layer and are connected with the antenna radiation patch through the four rectangular parasitic patches, the four feed probes 4 of each antenna unit feed through rotary feed structures which are equal in amplitude and sequentially differ by 90 degrees, and the windmill-shaped microstrip radiation patch is connected with rectangular blocks of the four rectangular parasitic patches of the four metallized probes for feed. feeding in equal-amplitude excitation with the phase difference of 90 degrees is performed in sequence to form circular polarization radiation, and the antenna arrays are arranged in a rectangular manner at equal intervals according to unit intervals to form an antenna array surface.

The invention discloses a Ka-band standing wave type series-fed microstrip line array antenna, a Ka-band standing wave type series-fed microstrip area array antenna and manufacturing methods thereof.The microstrip line array antenna comprises a dielectric substrate, a ground layer, a main feed line, a feed line and a series-fed microstrip line array. The main feed line and the series-fed microstrip line array are both connected to the upper surface of the dielectric substrate. The ground layer is connected to the lower surface of the dielectric substrate. The series-fed microstrip line arraycomprises a first impedance transform matcher and a plurality of array elements. The microstrip area array antenna includes a dielectric substrate, a ground layer, a main feed line, a plurality of second impedance transform matchers, and a plurality of series-fed microstrip line arrays. The main feed line, the plurality of second impedance transform matchers and the plurality of series-fed microstrip line arrays are all connected to the upper surface of the dielectric substrate. The ground layer is connected to the lower surface of the dielectric substrate. One end of the series-fed microstripline array is open-circuited, and the other end of the series-fed microstrip line array is connected to the main feed line through the second impedance transform matchers. The incident wave and the reflected wave are superimposed on the main feed line to realize standing wave transmission. The antenna structure is simplified by using the compact structure and simple design of the series-fed network.

The invention relates to a planar multi-pole sub-vector receiving array system which can work within a low-frequency range of 20-1000 Hz and has high array gain and a small-size narrow beam. The planar multi-pole sub-vector receiving array system comprises nine vector array elements, a cylindrical voltage-resistant array body, an upper covering plate, a lower covering plate, twenty-seven signal amplification filtering circuit unit, a signal collecting unit, a power supply battery unit and a connecting wire, wherein the nine vector array elements are arranged into a 3*3 planar array on the upper covering plate of the cylindrical array body, an O-shaped ring is used for achieving watertightness between the array elements and the upper covering plate of the array body and is fixed through a bolt, the twenty-seven signal amplification filtering circuit unit, the signal collecting unit, the power supply battery unit and the connecting wire are arranged inside the cylindrical array body, and the whole system has no cable output. The planar multi-pole sub-vector receiving array system is small in size, light in weight and convenient to use, can obtain good array processing gain and an ideal wave beam width at a low-frequency stage, and can largely improve the technical level of a hydroacoustic detection system.

The invention provides a broadband radiation unit and an antenna. The broadband radiation unit comprises two pairs of polarized orthogonal radiators, each radiator comprises two radiation arms which are vertically connected with each other and a decoupling unit which is connected between the two radiation arms and forms a closed loop together with the two radiation arms, the decoupling unit is used for reducing mutual coupling with the high-frequency radiation unit, and the two adjacent radiation arms of the two adjacent radiators are arranged in parallel. According to the broadband radiationunit, the mutual coupling with the high-frequency radiation unit is effectively reduced, the isolation degree and the directional diagram performance of the antenna are improved, the equivalent aperture of the broadband radiation unit is larger, the beam width is narrower, the sector edge level is more quickly reduced, and the unit gain of the broadband radiation unit is greatly improved.

The invention provides a base station antenna, which comprises at least one radiating element (120), a reflecting plate (110) and a function board, wherein the reflecting plate (110) is arranged on one side of the at least one radiating element (120) and is used for reflecting electromagnetic wave; the function board and the reflecting plate (110) are respectively arranged on two sides of the at least one radiating element (120); the function board comprises multiple micro-structure units (220). According to the base station antenna provided by the invention, the function board with a conductive geometric structure is arranged, so that the antenna gain can be increased.

The invention relates to the technical field of antennas, in particular to a dual-band 5G micro-strip antenna. The dual-band 5G micro-strip antenna includes a dielectric substrate, the dielectric substrate includes a first surface and a second surface, metal foil is laid on the first surface of the dielectric substrate, and the first surface of the dielectric substrate serves as a grounding plane of the antenna; the first surface and the second surface of the dielectric substrate are both provided with metal patches and further include feeder ports, the feeder ports feed the metal patches through coaxial lines or micro-strip lines, the inner diameter of each coaxial line is connected to the first surface, the outer diameter of each coaxial line is connected to the second surface, the metal patches are dendritic, and each metal patch includes a plurality of polygonal radiating bodies; the antenna is small in thickness and simple in structure and can solve the communication problem of small equipment, the work efficiency is effectively improved, and compared with a traditional antenna, the antenna area is reduced.

The invention relates to the technical field of microwaves and antennas, and particularly discloses a cavity-backed ultra-wideband antenna device used in radio systems such as radar and communication. The cavity-backed ultra-wideband antenna device is characterized by being provided with a small log-periodic antenna, a metal cavity and a wideband microwave wave-absorbing material layer, wherein the small log-periodic antenna is arranged in the metal cavity; the wideband microwave wave-absorbing material layer is arranged at the bottom of the inner side of the metal cavity; and the small log-periodic antenna is of a micro-strip printed circuit structure. Compared with the prior art, the cavity-backed ultra-wideband antenna device has the obvious advantages of small size, low cost and the like.

Examples disclosed herein describe an antenna with antenna elements that may be selectively activated and deactivated to define active apertures. The active apertures may be of different shapes and sizes. An antenna may include one active aperture or multiple active apertures at a point in time. These one or more active apertures may be reconfigured, e.g., by deactivating the active antenna elements and activating other antenna elements.

The invention discloses a dual-polarized broadband antenna array with a high-isolation suspended microstrip line for balanced feeding. The antenna array mainly comprises an antenna body and a feed network for feeding the antenna body, the antenna body is formed by arranging a plurality of antenna units. The antenna unit comprises an upper dielectric plate, a middle dielectric plate, a lower dielectric plate, a first polarization coaxial probe and a second polarization coaxial probe. A radiation patch is printed on the upper surface of the upper dielectric plate and is connected with the firstpolarization coaxial probe and the second polarization coaxial probe, and a grounding reflection plate is printed on the lower surface of the lower dielectric plate. Compared with the prior art, the dual-polarized broadband antenna array has the advantages of high isolation, the high gain and the wide impedance bandwidth.

The invention discloses a radar adaptive sidelobe cancellation algorithm and an adaptive sidelobe cancellation system. A radar adaptive sidelobe cancellation system comprises a main channel and a plurality of auxiliary channels. A main channel signal is weighted by a main antenna and then synthesized, is used for determining the target direction, and has the characteristics of strong directivity, narrow beam width, low sidelobe level and the like. Auxiliary channel signals are independently sent in by auxiliary antennas, the auxiliary antennas are low-gain omnidirectional antennas, and the gain of the auxiliary antennas is equivalent to the minor lobe level of the main antenna. When a desired signal and interference simultaneously arrive at the main and auxiliary antennas, a desired signal component in each auxiliary channel is far smaller than a desired signal component in the main channel, and the interference amplitude is roughly equivalent. If real-time weighted summation is carried out on the auxiliary channels to compensate for the fixed phase difference caused by the wave path difference between the main channel and the auxiliary channel, and then subtraction operation is carried out on the output of the main channel, interference can be cancelled in a self-adaptive mode.

The invention belongs to the technical field of antennas, and particularly relates to a Ka-band high-gain substrate-integrated waveguide ripple antenna and system. The antenna comprises a dielectric layer, a first metal layer and a second metal layer, wherein the first metal layer is attached onto an upper surface of the dielectric layer, the second metal layer is attached onto a lower surface ofthe dielectric layer, a through hole is formed in each of the first metal layer and the second metal layer, the shapes of the through holes are same, the vertical positions of the three through holesare corresponding to each other, a plurality of hollow concentric rings are arranged on the first metal layer, a metal via hole structure is arranged on the dielectric layer, and the first metal layercommunicates with the second metal layer by the metal via hole structure. The invention also provides an antenna system. The antenna system comprises a matched waveguide, a standard rectangular waveguide and the antenna, wherein the matched waveguide is connected with the second metal layer, and the standard rectangular waveguide is connected with the matched waveguide. The antenna has the advantages of high gain, wide bandwidth, narrow E-surface and H-surface main lobe beam width, low cross polarization and the like.

The invention discloses a high-frequency-band dielectric material characteristic measurement method, and belongs to the technical field of microwave antenna material characteristic measurement. The method includes building a lens antenna model in three-dimensional full-wave electromagnetic simulation software, performing primary simulation on the lens antenna model, obtaining a group of far-field radiation pattern test parameters, and wherein a lens of the lens antenna model is made of a to-be-tested high-frequency-band dielectric material; manufacturing a lens antenna according to the lens antenna model, and performing actual far-field radiation pattern test to obtain actual far-field radiation pattern test parameters; performing post-simulation, only changing the dielectric constant and the loss angle tangent in the lens antenna model, and performing simulation to obtain N groups of far-field radiation pattern test parameters of the lens antenna model; and comparing the post-simulation result with actual far-field radiation pattern test parameters to obtain dielectric constants and loss tangent values corresponding to a group of simulation values closest to the actual measurement result. According to the invention, the dielectric material characteristics of the high-frequency-band dielectric material sample to be measured can be conveniently and accurately obtained, and the cost is low.

The invention discloses an antenna with an adjustable wave width. The antenna comprises a switch device, a radiation device and a phase shifter; the switch device comprises a first input branch, a second input branch, a first output branch, a second output branch and a switching switch component; the radiation device comprises a first radiation unit and a plurality of second radiation units; eachsecond phase-shifting output port is connected with each second radiation unit in a one-to-one correspondence mode; the output port of the first output branch is connected with the input port of the phase shifter, and the input port is connected with the output port of the first input branch through the switching switch component; the output port of the second output branch is connected with the first radiation unit, and the input port is connected with the output port of the second input branch through the switching switch component; the input port of the second input branch is connected witha first phase-shifting output port; and the output port of the first input branch is connected with the input port of the second output branch through a switching switch component. Therefore, the beam width of the antenna vertical plane can be changed, and the requirements of different coverage scenes can be met.

A fractional beam forming network antenna includes a beam forming network and a plurality of antennas. The network includes input ports, output ports, and at least one delay device. The beam forming network couples input ports to the output ports through the at least one delay device. The antennas are vertically disposed relative to each other, and coupled to the output ports. At least two of the antennas include a different elevation tilt and / or azimuth rotation relative to each other. A method of fractional beam forming is provided, which includes coupling, using a beam forming network, input ports to output ports through at least one delay device; disposing a plurality of antennas vertically relative to each other; coupling the antennas to the output ports; and rotating at least two of the antennas in different elevation and / or different azimuth relative to each other.

The invention discloses a dipole antenna array with a bunching effect as a theoretical model, provides two ultra-low profile omnidirectional antenna systems with bunching effects based on the theoretical model, and belongs to the technical field of antennas. Compared with a single dipole (namely an uncompressed beam), the dipole antenna array disclosed by the invention has the advantages that narrower beam width and higher gain are obtained, the bunching target is realized, and theoretical guidance is provided for the design of an actual antenna system. According to the two ultra-low profile omnidirectional antenna systems with the bunching effect, the remarkable bunching effect and gain improvement effect are achieved while the ultra-low profile is kept, and the two ultra-low profile omnidirectional antenna systems can be well applied to a limited space and a specific scene; and the design has great frequency flexibility, and an antenna system working at other frequencies (such as 2G, 4G and the like) can be easily designed, so that corresponding theories and engineering technologies in the antenna field are further enriched and developed.

The invention discloses a dual-polarized broadband antenna array with high isolation suspension microstrip line balanced feed. The antenna array mainly consists of an antenna body and a feed network for feeding the antenna body. The antenna body is composed of The antenna unit is arranged, and the antenna unit includes an upper dielectric board, a middle dielectric board, a lower dielectric board, a first polarized coaxial probe and a second polarized coaxial probe, and the upper surface of the upper dielectric board is printed A radiation patch is prepared and connected to the first polarized coaxial probe and the second polarized coaxial probe, and a ground reflection plate is printed on the lower surface of the lower dielectric board. Compared with the prior art, the invention has high isolation, high gain and wide impedance bandwidth.