220results about How to "Reduce section height" patented technology

The invention discloses an improved-type low-profile low-scattering strong-coupling UWB (ultra wide band) phased array, and the phased array comprises a series of dipole radiation unit layers which are regularly and periodically printed on one thin dielectric layer. A rectangular paste placed below a dipole antenna unit in each radiation unit layer can improve the capacity coupling of the tail endof the antenna unit. A metal periodic structure is added to a second wide angle impedance matching layer of the antenna, and the asymmetric processing of two grounded metalized through holes is performed. The above measures can effectively improve the unit active standing-wave ratio during H plane scanning, and effectively inhibit the mode item scanning. The second wide angle impedance matching layer can effectively reduce the single-station RCS during the vertical incidence of co-polarized waves. The antenna provided by the invention is especially suitable for a hidden carrier platform in anew generation.

The invention discloses a K/Ka dual-band common-aperture antenna array, aiming to provide an antenna array surface capable of reducing the antenna profile, covering K and Ka bands and sharing a dual-band aperture. The invention is implemented by the following technical schemes: K-band patches are distributed on a dielectric substrate in the form of a uniform rectangular array, Ka-band patches areinterspersed in the center of the interval of adjacent K-band patches in an interpolation manner, the K-band patches are in orthogonal connection with a bonding pad located on the bottom surface of the dielectric substrate through a feeder pillar that penetrates through the dielectric substrate, the bonding pad is connected with a coaxial feeder, and the coaxial feeder penetrates through a metal base plate to connect with the bonding pad and feeds in a touch-type connection manner, wherein the K-band patches are combined with the metal base plate through the feeder pillar to form a K-band antenna array surface, the feeder pillar is connected with the coaxial feeder through the bonding pad to form a K-band channel; and the Ka-band patches are combined with the metal base plate through the feeder pillar to form a Ka-band antenna array surface, and the feeder pillar and the bonding pad conduct the coaxial feeder to form a Ka-band channel.

The invention discloses an ultra-wideband planar phased array antenna and a beam scanning method thereof, and relates to the technical field of antennas. The ultra-wideband planar phased array antennacomprises a dielectric substrate, and a liquid crystal phase shifter network which is externally applied with a bias voltage and arranged on the dielectric substrate, wherein the liquid crystal phaseshifter network is composed of a plurality of liquid crystal phase shifter units. An antenna unit array which covers a plurality of frequency bands is arranged above the liquid crystal phase shifternetwork; and the antenna unit array is composed of a plurality of antenna units, wherein the antenna unit is a Vivaldi antenna with a slot line, and a liquid crystal phase shifter is powered through amicrostrip line-slot line structure. Compared with the prior art, the problems that the ultra-wideband phase-controlled profile is high in profile degree, large in antenna loss and low in utilizationrate are solved.

The invention provides a phased-array antenna subarray for circularly polarized wide-angle scanning, and aims at providing a phased-array antenna subarray which has a good wide-angle scanning gain characteristic and a good wide-angle scanning circular polarization characteristic, and can avoid derotation properly. The phased-array antenna subarray is achieved by the technical scheme as follows: three circularly polarized microstrip antenna radiation patches are distributed on a microstrip antenna dielectric plate (10) in a ternary rotary inversion subarray form; a metal layer (6) at the lower part of the microstrip antenna dielectric plate serves as a metal place for three microstrip antenna units; each coaxial joint inner core (3) and each coaxial joint outer core (4) form a coaxial feeding port; each coaxial outer core is connected with the metal place; each coaxial joint inner core is connected with the corresponding radiation patch located in the microstrip antenna dielectric plate in blind-inserting and non-contact manners; and the coaxial feeding ports perform electromagnetic coupling feeding and implement phase compensation on the microstrip antenna units to obtain a subarray radiating left-hand circular polarization electromagnetic waves or a subarray radiating right-hand circular polarization electromagnetic waves.

The invention provides a low-profile low-elevation high-gain circularly polarized electromagnetic dipole antenna for satellite communication, and belongs to the field of satellite mobile communication. According to the antenna, the electric dipole radiation arms are designed into specific fan shapes, so that the impedance bandwidth of the antenna is effectively expanded; the beam width of the antenna is expanded through the parasitic magnetic dipole, and the gain at the low elevation angle is increased; meanwhile, a novel AMC structure (an artificial magnetic conductor reflecting surface) is adopted and is suitable for an electromagnetic dipole antenna, the AMC structure is compact, the design is simple, and the profile height of the antenna can be effectively reduced; and an air layer is introduced between the dielectric substrate and the AMC, so that the impedance bandwidth of the antenna is widened, and the gain of the antenna is increased. Therefore, the overall size of the antenna is 0.48[lambda]0*0.48[lambda]0*0.054[lambda]0([lambda]0 is the working wavelength at the center frequency point of the antenna), and the antenna has the characteristics of miniaturization and low profile.

The invention discloses a composite beam comprising a steel beam with concrete at the abdomen. The composite beam comprises a steel beam (1) and a floor plate (7), wherein the concrete (5) is poured at the abdomen of the steel beam (1); the outer wall of the concrete (5) is flush with the outer sides of an upper flange and a lower flange of the steel beam (1); a steel reinforcement cage (4) is embedded at the abdomen of the steel beam (1); an abdomen shearing force connecting piece (3) is welded at the abdomen of the steel beam (1); reliable bonding and joint working of the concrete at the abdomen of the steel beam and the steel beam (1) are ensured through the abdomen shearing force connecting piece (3); outer shearing force connecting pieces (2) are welded at the outer side of the upper flange of the steel beam (1); and combination and joint working of the steel beam (1) and the floor plate (7) are realized through the outer shearing force connecting pieces (2). Compared with the prior art, the combination with the floor plate is taken into account, the whole bearing capacity and rigidity are improved, the section height of a member is decreased, and the building clearance is increased, so that the economic performance is greatly improved.

The invention discloses a broadband low-profile helical antenna with a loaded parasitic patch. The broadband low-profile helical antenna with the loaded parasitic patch comprises a dielectric substrate, a metal grounding plate and a coaxial feed device, wherein the metal grounding plate is printed on the dielectric substrate, the outer surface of the coaxial feed device is connected with the grounding plate, an inner core of the coaxial feed device is connected with the bottom of a spiral metal piece, and a metal patch used for enhancing electromagnetic coupling with the spiral metal piece is arranged above the spiral metal piece. According to the broadband low-profile helical antenna with the loaded parasitic patch, a parasitic metal patch is loaded on the spiral metal piece in an electromagnetic coupling mode so that performances of a patch helical antenna can be effectively improved, profile height of the antenna is reduced, and meanwhile, symmetry of antenna radiation pattern in whole working bandwidth can be improved.

The invention provides a dual-polarization dielectric resonator antenna unit, and the dielectric resonator antenna unit comprises a substrate, a dielectric resonator and a director, wherein the substrate, the dielectric resonator and the director are sequentially connected from the bottom to the top. The upper surface of the substrate is provided with a grounding surface, and a gap is disposed in the grounding surface in an etching manner. The lower surface of the substrate is provided with a microstrip feed line which is matched with the gap and is used for feed. The projections of the dielectric resonator and the director on the substrate cover the gap. According to the embodiment of the invention, the dielectric resonator antenna unit meets the requirements of low profile and high gain of a dual-polarization dielectric resonator antenna unit. Moreover, a feed structure of the dielectric resonator antenna unit is symmetric, and is liable to assemble. In addition, the invention also discloses a base station antenna comprising the dielectric resonator antenna unit.

The invention discloses a low-profile dual-polarization strong-coupling ultra-wideband planar dipole phased array antenna and a development method thereof. By means of a crossed dipole structure, twokinds of polarized wave dipoles which are perpendicular to each other in radiation are placed in one plane; an artificial metamaterial impedance matching layer arranged above the antenna replaces a traditional dielectric matching layer, so that the profile height and the overall quality of the antenna are effectively reduced, and the antenna is easier to process and install. The use of a resistivematerial improves standing waves in the whole frequency band and expands the low-frequency bandwidth at the same time, so that the antenna has better broadband characteristics. In a 0.25-2GHz (8: 1)frequency band, active standing waves scanned by +/-60-degree scanning of an E surface and +/-45-degree scanning of an H surface are smaller than 3, the average radiation efficiency of each azimuth surface is higher than 70%, and the profile height is only 0.453 high-frequency wavelengths; and the antenna is suitable for application platforms requiring ultra wide band, dual polarization and low profile.

The invention belongs to the technical field of an omnidirectional circular polarized antenna and discloses a microminiature low profile omnidirectional circular polarized antenna. The antenna comprises a radiation portion, wherein the radiation portion comprises an upper medium board, four coupling plates, a circular metal ring, a circular metal disc and a center metal column, and the coupling plates, the circular metal ring and the circular metal disc are printed on an upper surface of the upper medium board. The antenna is advantaged in that four metal short circuit columns are connected between tail ends of the coupling plates and a metal floor, a current spreading path on the coupling plates is extended, the transverse dimension of the antenna is effectively reduced, and profile height is further reduced; the inner coupling plates are added in the outer coupling plates, coupling energy among antenna units is enhanced, compared with the prior art, on the condition that directional diagram performance is guaranteed, the dimension of the antenna is substantially reduced, the coupling energy among the control units can be excellently controlled through adjusting distances between the inner coupling plates and the outer coupling plates and length of the inner coupling plates, and thereby antenna work frequency is adjusted.

The invention discloses a large-scale MIMO active antenna array applied to 5G millimeter wave communication. The large-scale MIMO active antenna array comprises an antenna array, a multifunctional board, a multi-channel TR module and a wave control power supply module, wherein the antenna array is correspondingly arranged on the multifunctional board, and the multi-channel TR module and the wave control power supply module are fixed on the multifunctional board and connected with the antenna array; the invention adopts a large-scale array antenna technology to achieve directional signal transmission, utilizes the directional gain of the phased array antenna to offset the space path loss of the signals, and utilizes the characteristic of dynamically adjustable beam pointing of the phased array antenna to achieve the multiplexing of the space dimensionality of the signals to greatly reduce the mutual interference among users, powerfully improve the capacity of the system and achieve low-power and high-efficiency signal transmission.

The invention discloses an anti-multipath interference antenna for a GNSS. The anti-multipath interference antenna is miniaturized, low in profile, low in cost and easy to process. The anti-multipath interference antenna comprises a first medium layer and a floor fixed on the upper surface of the first medium layer. The floor is provided with an annular groove and divided into an internal area and an external area by the annular groove. The internal area and the external area are connected through a plurality of lumped resistors which are connected to the two sides of the annular groove in a bridging mode. A second medium layer and a microstrip patch layer are fixed on the upper surface of the internal area of the floor, wherein the microstrip patch layer is fixed on the upper surface of the second medium layer. According to the anti-multipath interference antenna, as it is unnecessary to arrange a multilayer fold structure on the floor, the profile height of the antenna can be reduced greatly. The antenna is small in size, light in weight, low in cost, small in lateral dimension and convenient to install and carry. Compared with a solid floor with the same size, the backward cross-polarization of the antenna can be lowered by 13dB or more to the maximum degree, and the maximum gain of co-polarization can keep unchanged basically. The anti-multipath interference antenna is suitable for being popularized and applied in the technical field of GNSSs.

The invention discloses an inverted-F broadband antenna suitable for vehicle's mobile communication. The inverted-F broadband antenna comprises a monopole radiating body and a metallic baseboard, wherein the monopole radiating body is formed by thickening one rectangular metal sheet by forming an edge profile, and the different positions along the edge profile of the rectangular radiating body are inward provided with multiple grooves, the monopole radiating body is arranged on the metallic baseboard, the long edge of the monopole radiating body is placed along a horizontal direction, the feed is supplied to the gap between the left lower endpoint of the monopole radiating body and the baseboard, and the right lower endpoint to the metallic baseboard is in a short-circuit status. The antenna operates in high and low frequency bands, the low frequency band is 689MHz-960MHz (VSWR (Voltage Standing Wave Ratio) is no more than 2.15 and the bandwidth is 31.60%), the high frequency band is 1260MHz-6500MHz (VSWR is no more than 2.17 and the bandwidth is 135.05%), and the antenna covers all mobile communication frequency bands of three operators 2G/3G/4G, thus the antenna is extremely wide in frequency band, excellent in directivity, high in efficiency, small in size, low in profile and easy to process; the antennas is suitable for the optimized antenna type of high-speed rail mobile communication and beneficial to reduce the air resistance of a train which runs at a high speed.

The invention discloses an ultralow-profile low-scattering ultra-wideband phased-array antenna based on electromagnetic metamaterial loading, which realizes E-plane +/-70-degree scanning and H-plane +/-60-degree scanning in a 6-18GHz broadband, and the profile height of the ultralow-profile low-scattering ultra-wideband phased-array antenna is only 0.28 high-frequency (18GHz) wavelength. The loaded electromagnetic metamaterial is composed of a split ring periodic structure, an I-shaped resistive patch, an intersecting long-strip periodic structure and a plurality of wide-angle impedance matching layers, and through the integrated design of the electromagnetic metamaterial and the phased-array antenna, the phased-array antenna has the ultra-wide-band and ultra-wide-angle scanning characteristic and meanwhile has the remarkably low profile height. In addition, the cross polarization RCS of the phased-array antenna is remarkably reduced within the full-frequency range of the working frequency of the phased-array antenna, and meanwhile, the radiation efficiency of the phased-array antenna is kept above 95%.

A device with a lead wire surface mounting radar transmitting-receiving assembly comprises an integrated box body and a cover plate, the integrated box body comprises a ring frame, a substrate and a plurality of lead wires used as power supply, control signal, radio frequency input and radio frequency output interfaces. The cover plate is welded with the top of the ring frame, the bottom of the ring frame is welded at the periphery of the right side of the substrate, and the backside of the substrate is equipped with a rectangular cavity. The lead wires are welded at the rectangular cavity on the backside of the substrate, and are in paired arrangement at the two sides of the substrate. A radar transmitting-receiving circuit is arranged on the right side of the substrate, and the lead wires are electrically connected with the radar transmitting-receiving via metal holes. According to the present invention, by utilizing the substrate, namely a package technology, the substrate used for device loading and circuit wiring is used as a part of the package directly, thereby saving a pedestal of an assembly box body. By an interface technology having no connector and a cascadable feed technology, the transmitting-receiving assembly can be surface mounted and can be in cascade use, so that the transmitting-receiving assembly is miniature and light, and the profile height and the mass surface density of an active antenna panel can be reduced effectively.

The invention discloses a coplanar waveguide feeding-based miniaturized wideband dielectric resonator antenna. The coplanar waveguide feeding-based miniaturized wideband dielectric resonator antenna comprises a dielectric substrate, a coplanar waveguide and an annular dielectric resonator; the coplanar waveguide includes a grounding plate, a radiation patch and a feeding part; the feeding part comprises an annular patch and central strip lines; the grounding plate includes two parts, wherein the two parts are of symmetrical structure relative to the central strip lines; two symmetrical L-shaped notches and two symmetrical rectangular notches are formed in the grounding plate; the radiation patch is composed of four 1/4 circular patches which are symmetrical to each other in pairs; and the annular dielectric resonator is located just at the center of the annular patch. According to the coplanar waveguide feeding-based miniaturized wide-band dielectric resonator antenna of the invention, a coplanar waveguide feeding annular printed monopole antenna and dielectric resonator antenna-hybrid radiation mechanism is adopted; and a plurality of working modes of the resonator can be excited; and therefore, bandwidth can be expanded. The coplanar waveguide feeding-based miniaturized wide-band dielectric resonator antenna has excellent impedance matching performance, high radiation efficiency and high peak gain. The coplanar waveguide feeding-based miniaturized wide-band dielectric resonator antenna has broadband work performance with small size ensured.

The invention includes antenna units, feeder port, phase-change unit and landnig plate. The four antenna units are all above the landing plate and in arched shape, the two symmetric placed antenna unit through phase-change unit and feeder port to form a symmetric vibrator, the outer conduction of feeder port is connected with another antenna unit in the symmetric vibrator through phase-change unit, the length of connectnig cable between outer conduction of feeder port and phase-change unit is near to zero, the feeder port passes through the landing plate, the outer conduction of feeder port is connected with the landing plate.