112results about How to "Increased beam width" patented technology

A wireless network base station for optimizing the beam width of a downlink traffic beam in real time is provided. The base station includes a transceiver for receiving a pilot strength signal and a power control signal from a mobile station. The base station further includes beam forming circuitry operable to form a downlink traffic beam spatially directed to serve the mobile station having a beam width set as a function of the received pilot strength signal and power control signal.

An exemplary method comprises positioning a first antenna to receive a first signal from a second antenna, the second antenna comprising energy absorbing material that functions to expand beamwidth, receiving the first signal from the second antenna, detecting a plurality of gains based on the first signal, repositioning the first antenna relative to the second antenna to a position associated with an acceptable gain based on the first signal, removing at least some of the energy absorbing material from the second antenna to narrow the beamwidth of the second antenna, receiving, by the first antenna, a second signal from the second antenna, detecting a plurality of gains based on the second signal, and repositioning the first antenna relative to the second antenna to a position associated with an increased gain of the plurality of gains based on the second signal, the increased gain being greater than the acceptable gain.

The invention relates to a preparation method of a spherical-crown transmitting transducer with high frequency and wide wave beam, comprising the following steps of: employing a spherical crown shape array distribution, cutting four sides of the spherical crown to form a square shape; distributing array elements according to a certain spacing distance and then filling polymer into clearances among the array elements; grouting matched layers, executing vacuumization treatment on the matched layers firstly, executing vacuumization treatment and heating in the grouting process; grouting a spherical-crown polyurethane layer outside the matched layers; connecting anodes, wherein the anodes of the array elements are connected in parallel; leading out an anode lead; adhering one side of the anode onto the spherical-crown surface of a foamed polyurethane pedestal; after solidifying a glue layer, sharing cathodes of the array elements and leading out a cathode lead; and adhering a backside lining of an assembled spherical-crown array with a backseat and leading out the lead from a routing groove. The invention is applicable to seaport monitoring, frogman detection, underwater target identification and obstacle avoidance and navigation of underwater vehicles, has the advantages of simple manufacturing process, wide width of high-frequency wave beams and high source grade of each watt.

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 belongs to the technical field of antennas, and discloses a broadband wide-angle-axial-ratio circularly-polarized patch antenna. The antenna comprises a radiator and a one-to-four feed network. The radiator is composed of four Y-shaped coupling structures and circular radiation sheets which are printed on a first dielectric plate and have the same specification, a ground printed on asecond dielectric plate, six L-shaped parasitic branches which are uniformly distributed around the ground and have the same specification, and four dielectric cylinders which play a role in supporting. The feed network is composed of a two-stage cascaded Wilkison power divider and a 90-degree phase shifter which are printed on a third dielectric plate. According to the invention, the circular radiation patch is fed in a coupling mode, the network adopts the Wilkison power divider and the 90-degree phase shifter which are printed on the medium and are in a multi-stage cascade mode, and the antenna is easy to process, low in profile, light in weight and wide in working bandwidth and can be applied to a navigation system and the like.

The invention relates to a shaping method of special channel wideband service wave beam, and a relative device, wherein the method uses user target direction as center, uses angle distance to form a plurality of narrow service beams, to be weighted and layered to synthesize wide service beam. The device comprises an antenna array, a multi-path amplifier, a multi-path receiving / sending signal machine, an ascending reach angle evaluation and base band processor, a descending wideband beam shaping weighting value generator, and a descending beam shaping unit. The invention can effectively improve beam width, which only stores the shape weighting values of one group of general narrow service beams with different directions, without differentiating different antenna states, with easy application, reduced the effect of narrow beam width on the property of intelligent antenna property, improved system stability and reliability.

An antenna arrangement for mobile communication, the antenna arrangement comprising a plurality of radiators (202, 203) for at least two different frequency bands, the plurality of radiators being placed on a reflector (204), wherein the plurality of radiators comprises a first group of radiators arranged to operate in a first frequency band of the at least two different frequency bands, wherein the plurality of radiators comprises a second group of radiators arranged to operate in a second frequency band of the at least two different frequency bands, the first group of radiators forming a first antenna, the second group of radiators forming a second antenna, wherein the radiators are cross-polarized, wherein the radiators (203) of the first group are of cross-type, and wherein the radiators (202) of the second group are of four-leaf type.

A narrow-band laser device for exposure apparatus that allows to reduce damage to, and to hence extend the life of, optical elements such as chamber windows, output coupling mirrors or the like. A ring resonator is provided in an amplification stage laser of the narrow-band laser device for exposure apparatus that comprises an oscillation stage laser and an amplification stage laser. An OC, a high reflection mirror and a high reflection mirror are arranged to be offset, for instance, relative to a longitudinal direction axis of discharge electrodes. As a result, the beam width of laser light injected through the OC of the amplification stage laser becomes wider as the beam shifts inside the ring resonator, in each round trip within the ring resonator. The energy density of laser light in the optical elements of the amplification stage laser becomes reduced thereby, thus prolonging the life of the optical elements.

The invention discloses a miniature wide beam dual polarization microstrip antenna comprising a radiation substrate with four miniature radiation sheets and a feed network substrate nested in a support frame; the radiation substrate is arranged on the top of the feed network substrate; the feed network substrate is provided with two intersected feeders, the bottom face is provided with a metal base board, and the intersected positions of the feeders are connected through a bridge element; a feed probe is connected between each miniature radiation sheet and the feeder, and a short circuit rod is connected between each miniature radiation sheet and the metal base board; in addition, a support rod is arranged between the radiation substrate and the feed network substrate, and two ends of the support rod are connected with the radiation substrate and the feed network substrate respectively; one side of the bottom face of the metal base board is provided with a radio frequency joint connected with the feed portions of two intersected feeders. The miniature wide beam dual polarization microstrip antenna realizes miniature, wide beam, and dual polarization features.

The invention discloses a large-scale antenna dome electrical performance compensation method based on reflector shaping, and aims to solve the problem that an antenna dome excessively affects antenna electrical performance. According to the technical scheme, the method includes calculating antenna far field according to aperture field; drawing a far field pattern and extracting electrical performance indicators; calculating the aperture field penetrating the antenna dome; calculating coordinates of points on a shaped reflector; calculating the aperture field penetrating the antenna dome the antenna dome after reflector shaping; calculating the far fields of an antenna with a dome before and after reflector shaping, and drawing far field patterns and extracting electrical performance indicators; comparing the far field patterns and electrical performance indicators of an antenna without a dome, the antenna with the dome before and after reflector shaping, if electrical performance requirements are met, outputting the far field patterns and electrical performance indicators of the antenna without a dome, the antenna with the dome before and after reflector shaping; if not, performing fine-tuning on the shaped reflector, and repeating the processes till the electrical performance meets the requirements. By the aid of the method, the electrical performance of a system of an antenna with a dome can be optimized effectively, and the method can be applied in antenna dome analysis and design.

An antenna system for a transmitter comprising an array of antennas and control means. The antennas are arranged to transmit over all or part of the transmitters coverage area The control means control the number of antennas that are used to transmit a signal in dependence on the width of the signal to be transmitted.

The invention relates to an omnidirectional circularly polarized antenna, in particular to a low-profile omnidirectional circularly polarized antenna with a wide axial-ratio beam on a pitching surface. The low-profile omnidirectional circularly polarized antenna comprises a dielectric substrate, a round monopole radiator and a hexagonal radiator, wherein the round monopole radiator is arranged in the center of the antenna and comprises an upper-layer round metal patch and a lower-layer round metal patch, the upper-layer round metal patch and the lower-layer round metal patch are right opposite to each other and are surface-mounted at two sides of the dielectric substrate, six metal patch short-circuit via holes are formed between the upper-layer round metal patch and the lower-layer round metal patch in a penetrating way, dual-L shaped gaps are formed in two edges of the via holes, the hexagonal radiator is arranged around the round monopole radiator and comprises an upper layer and a lower layer, the upper layer and the lower layer are surface-mounted at the two sides of the dielectric substrate, each layer comprises six groups of S-shaped matching transmission lines, a rectangular metal patch and a round metal sheet, and the hexagonal radiator penetrates through the dual-L shaped gaps and are connected with the via holes of the round monopole radiator. By the low-profile omnidirectional circularly polarized antenna, the problems of narrow 3dB axial-ratio beam and large volume of an existing circularly polarized antenna are solved. The low-profile omnidirectional circularly polarized antenna is suitable for wireless communication.

An antenna includes a ground plane, a dielectric, and an active radiating element. The dielectric is disposed on the ground plane, and the active radiating element is embedded in the dielectric for transmitting and / or receiving an RF signal. The antenna also includes a feeding element and a passive radiating element. The feeding element extends into the dielectric and is electrically coupled to the active radiating element. The passive radiating element is disposed on the ground plane and surrounds a periphery of the dielectric for perturbating the RF signal. The ground plane has a plurality of edges. At least one of the edges extends as a curvilinear lip. The curvilinear lip extends in a direction opposite the passive radiating element for directing the RF signal and for preventing abrupt discontinuity of the RF signal.

The invention discloses a leaky-wave antenna with a step impedance composite left-right-hand structure. The leaky-wave antenna comprises a dielectric substrate, a step impedance radiation array arranged on the dielectric substrate, two microstrip feeders and two transitions, wherein the back of the dielectric substrate is provided with a metal layer which is a grounding surface of the antenna; thetransitions connect the microstrip feeders and the step impedance radiation array; the step impedance radiation array is composed of multiple radiation units with the same shape and size; the radiation units are arranged in parallel at equal intervals, the adjacent radiation units are provided with electromagnetic field coupling therebetween but not directly connected through a conductor; and metallized via holes are located at the central positions of rectangular patches and connect from the top surface of the dielectric substrate to the metal layer at the bottom surface. The miniaturizationof the leaky-wave antenna is realized. Meanwhile, the radiation efficiency is improved, the radiation stopband is improved, and continuous scanning from forward to backward is achieved.

The invention discloses a circularly-polarized cross dipole GPS navigation antenna. The antenna comprises an upper dielectric substrate, a lower dielectric substrate, an intermediate dielectric substrate, a radiation unit, a parasitic unit and a feed unit, wherein the upper dielectric substrate and the lower dielectric substrate are arranged in parallel; the intermediate dielectric substrate is arranged between the upper dielectric substrate and the lower dielectric substrate and is perpendicular to the upper dielectric substrate and the lower dielectric substrate; and a reflecting plate is arranged on the lower surface of the lower dielectric substrate. The antenna is small in size, is large in bandwidth, is wide in beam, and can be well applied to GPS satellite navigation terminal devices.

Aspects described herein relate to a network for providing air-to-ground wireless communication in various cells. The network includes a first base station array, each base station of which includes a respective first antenna array defining a directional radiation pattern that is oriented in a first direction, wherein each base station of the first base station array is disposed spaced apart from another base station of the first base station array along the first direction by a first distance. The network also includes a similar second base station array where the second base station array extends substantially parallel to the first base station array and is spaced apart from the first base station array by a second distance to form continuous and at least partially overlapping cell coverage areas between respective base stations of the first and second base station arrays.

The invention provides a satellite navigation circularly polarized microstrip antenna. A triangular Y-shaped groove microstrip radiation unit is adopted, which has the characteristics of high radiation efficiency, high low-elevation gain, wide band, wide wave beam and minimization, and is particularly suitable for receiving low-elevation satellite signals and increasing the center accuracy of an antenna phase. The satellite navigation circularly polarized microstrip antenna comprises a metal radiant panel, a dielectric substrate and a metal reflection bottom plate, wherein the metal radiant panel and the metal reflection bottom plate are arranged on the upper surface and the lower surface of the dielectric substrate respectively; the metal radiant panel is triangular; the triangular radiant panel is provided with a Y-shaped groove; the Y-shaped groove comprises three strip-shaped open grooves; the starting ends of the three strip-shaped open grooves converge in an intersecting way, and the tail ends point to the three edges of a triangle respectively; the triangular radiant panel provided with the Y-shaped groove is used for controlling surface current flow, and radiating circularly polarized waves; and the edges of the strip-shaped open grooves of the Y-shaped groove are provided with coaxial feeding points for feeding electromagnetic wave signals.

The invention provides an air target quick capturing method of monopulse radar. By means of the method, a target searching and capturing capability of the radar can be remarkably improved on conditions of low signal-to-noise ratio and high-speed target movement, thereby realizing quick target capturing. The air target quick capturing method is realized through a technical solution which is characterized in that DSP embedded software is composed of a three-channel constant false-alarm rate detecting module, a wave beam direction adjusting module, a target parameter estimating module, a sequence position correlation module and a slide window accumulation confirmation module, wherein the method comprises the steps of inputting summation, direction difference and pitch difference three-channel distance images, performing constant false-alarm rate determination on the three-channel distance images, thereby obtaining a target signal with a highest amplitude; then changing elapse main triggering time, and adjusting the wave beam according to a designed strategy; performing target parameter estimation by means of a phase and a difference type monopulse measured angle; determining a fact that target correlation successes or fails by means of sequence position correlation; performing sliding window type accumulation on the correlation result, determining the accumulation result, and outputting the target information which is successively captured through the monopulse radar.

The present invention provides a wideband wide beam circularly polarized dielectric resonant antenna and a design method thereof. The antenna comprises a cylindrical microwave dielectric radiation unit, a dual-layer circuit substrate, a microstrip circuit, a coaxial feed and a choke sleeve. The cylindrical microwave dielectric radiation unit is arranged on the upper-layer circuit substrate of thedual-layer circuit substrate, and the dual-layer circuit substrate comprises an upper layer, an intermediate layer and a lower layer. The upper layer is a copper clad floor with an intersected gap, the intermediate layer is a rectangular microstrip, and the lower layer is a circular patch. The upper layer and the lower layer are connected via a metal via hole, the choke sleeve is connected with the lower-layer circular patch, and the coaxial feed penetrates the choke sleeve and is connected with the rectangular microstrip via the metal via hole. The antenna enables the bandwidth and the beam width to be increased, at the same time, has a lower structure complexity.

The invention discloses a millimeter wave passive multi-beam array device for a mobile terminal and an implementation method of the millimeter wave passive multi-beam array device; the device is provided with a dipole antenna array with double-sided printing, a feed network formed by a dielectric substrate integrated waveguide, a passive beam forming network and a micro-strip feed network. The millimeter wave passive multi-beam array can also be formed, and the characteristics of low profile, easiness in integration and H-surface wide beam coverage can be achieved; an antenna array is fed through the phase shift characteristics of the different input ports of the passive beam forming network, so that the beam scanning characteristic of the E surface and the multi-beam characteristic can beobtained; and by adoption of the scheme of the three pairs of electric dipole antenna arrays, the three-dimensional space coverage requirement of the terminal equipment over the hemisphere can be met, wherein the main space region meets the double polarization requirement.

The invention belongs to the technical field of wireless communication, and particularly relates to a multi-beam antenna based on a metasurface. The invention aims to solve the technical problem thatan existing multi-beam antenna needs a complex beam forming network. The multi-beam antenna based on the metasurface comprises an upper dielectric substrate, a metasurface layer, a middle dielectric substrate, a feed network layer, a lower dielectric substrate and a grounding plate which are coaxially arranged in sequence from top to bottom, wherein an air layer is arranged between the middle dielectric substrate and the feed network layer; the beam width and gain of the antenna are improved by arranging the upper dielectric substrate; the electromagnetic field distribution above the feed network layer is improved by additionally arranging the metasurface layer on the middle dielectric substrate and arranging the feed network layer below the middle dielectric substrate, so that the beams are enabled to be inclined in a pitch angle plane. The antenna does not need to design a complex beam forming network, the metasurface and the dielectric substrate are used for realizing multiple beams, the structure is simple, and the beams can be changed in an azimuth plane.

The invention discloses a millimeter wave differential feed dual-polarization wide-beam magnetoelectric dipole antenna. The antenna comprises four square metal patches, a differential coaxial feed structure, four groups of metal via holes, a dielectric substrate, a metal floor and a vertical metal fence, and the differential coaxial feed structure comprises a cross-shaped metal patch and four feed coaxial lines located under the metal floor. According to the invention, a differential dual-polarization coaxial feed form is adopted, the antenna has the characteristics of low cross polarization and good polarization diversity capability, has the characteristic of wide beam by adding the vertical metal column fence around the magnetoelectric dipole antenna, and can be applied to a linear phased array, and the bandwidth can cover a 5G millimeter wave frequency band.

The antenna radiating element includes an antenna configured to transmit a signal having one or more measurable characteristics and a shroud surrounding the antenna and configured to change the one or more measurable characteristics.

The invention provides a circularly polarized reconfigurable four-arm helical antenna. The circularly polarized reconfigurable four-arm helical antenna comprises a radiation main body and a feed network. The on and off of a radio frequency diode are controlled through direct current bias, the radiation main body can be changed into a left-handed four-arm helix or a right-handed four-arm helix, simultaneously the output signals of the feed network are correspondingly adjusted to delay at 90 degrees anticlockwise in sequence or delay at 90 degrees clockwise in sequence, and then a reconfigurablefunction of left-hand circular polarization and right-hand circular polarization is realized. The circularly polarized reconfigurable four-arm helical antenna is compact in integral structure, smallin volume, relatively wide in directional diagram wave beam, good in front-to-rear ratio and relatively small in cross polarization, has a circularly polarized reconfigurable function, so that the antenna is conveniently applied in circularly polarized wireless communication systems such as radio frequency identification and satellite communications.

The invention discloses a miniature antenna unit capable of controlling wave beam widths and a large-scale antenna array capable of controlling wave beam widths. The miniature antenna unit comprises a radiation plate, a dielectric layer, a micro-strip slot antenna substrate and a reflecting cavity; the dielectric layer is arranged between the radiation plate and the front surface of the micro-strip slot antenna substrate; the dielectric constant of the dielectric layer is greater than that of air; the micro-strip slot antenna substrate is a high-dielectric-constant substrate; and the dielectric constant of the high-dielectric-constant substrate is greater than 3.5; and the reflecting cavity is formed in the reverse surface of the micro-strip slot antenna substrate. The miniature antenna unit and the large-scale antenna array are small in size, and the wave beam widths can be controlled by changing the dielectric constant of the dielectric layer in the antenna unit and the dielectric constant of the high-dielectric-constant substrate.

The invention discloses a wide-beam magnetic dipole antenna, comprising a semicircular magnetic dipole structure and an elongated parasitic unit, wherein the semicircular magnetic dipole structure comprises two semicircular patches of the same radius and a vertical short circuit wall, the two semicircular patches are symmetrically placed in parallel up and down, and the vertical short circuit wallis connected to the two semicircular patches along the diameter direction of the semicircular patches; the elongated parasitic unit is placed along the central axis of the semicircular magnetic dipole structure, and is connected to the upper surface of the semicircular magnetic dipole structure; and the semicircular magnetic dipole structure is in a non-fully enclosed structure. The invention hasthe characteristics of small volume, high gain, low profile and simple structure, and has wide application prospects in various wireless sensing and radio frequency identification systems of the Internet of Things.

The invention relates to the communication field, the embodiment of which discloses a polarization compensation device used for transmitting signals by an antenna in the mobile communication. The method of the embodiment of the invention comprises the steps; polarized deflection caused by the dispersion of a reflecting surface is compensated by the structure of a spherical multilayer film; the coefficients of an incident field and a transmitted field are calculated by a transition matrix method; an extendible strut bar is utilized to adjust the longitudinal position of the spherical multilayer film. According to the method of the invention, the polarized deflection caused by the dispersion of the reflecting surface is compensated by the simply added spherical multilayer film, meanwhile, the width of the wave beams of the transmitting antenna is increased and the alignment requirements of a receiving end are reduced, so as to reduce the realization complexity of receiving equipment. The method of the invention slightly promotes the far gain of the antenna.

An antenna arrangement for mobile communication, the antenna arrangement comprising a plurality of radiators (202, 203) for at least two different frequency bands, the plurality of radiators being placed on a reflector (204), wherein the plurality of radiators comprises a first group of radiators arranged to operate in a first frequency band of the at least two different frequency bands, wherein the plurality of radiators comprises a second group of radiators arranged to operate in a second frequency band of the at least two different frequency bands, the first group of radiators forming a first antenna, the second group of radiators forming a second antenna, wherein the radiators of the first group have the same antenna aperture, e.g. the same antenna aperture length, as the radiators of the second group.

The invention belongs to the technical field of charging equipment and discloses a remote-controlled intelligent charging pile. A charging transformer is connected with a charging coil in an inductionplate mounted in a roadbed near an equipment cabinet through a cable; a plurality of induction plates and charging coils are arranged; the plurality of charging coils run in parallel; the charging oils are connected with an AC / DC voltage stabilizing unit, a high frequency power amplification unit and an energy transmission unit in sequence through leads; the AC / DC voltage stabilizing unit adoptsa reverse excitation circuit; the high frequency power amplification unit adopts a high frequency power amplification circuit; and input direct current is transformed into MHz sinusoidal alternating current to be used as an excitation source and so on input into a magnetic resonance unit by the energy transmission unit. According to the remote-controlled intelligent charging pile, by arranging theplurality of induction plates in the roadbed, wireless charging of an automobile can be realized to avoid a problem that multiple automobiles queue up for a long time to be charged.

The invention discloses a double-frequency circularly polarized combined antenna with a wide wave beam and a high gain. The antenna comprises a metal pedestal, which is provided with a metal frustum and a cross dipole antenna; and a microstrip antenna is arranged at the metal frustum. The metal frustum is composed of a metal base plate, a medium substrate and a metal paster, wherein the metal base plate, the medium substrate and the metal paster are superposed orderly. The metal paster is in a square shape whose two equal angles on a diagonal are cut off; and a coaxial cable is connected to the metal paster and an inner core of the coaxial cable is connected with the metal paster. A through hole is arranged at the center of the microstrip antenna. Besides, the cross dipole antenna comprises a rigid coaxial cable is arranged on the metal pedestal; the rigid coaxial cable passes through the metal frustum and the through hole of the microstrip antenna; and an end of the rigid coaxial cable is provided with a slit and a length of the slit is a quarter of an operating wavelength. In addition, a cross oscillator is also arranged at the end of the rigid coaxial cable as well as is composed of two short arms and two long arms; and the inner core of the rigid coaxial cable is connected with one short arm and one long arm.