61results about How to "Steady pattern" patented technology

The invention discloses a broadband low cross-polarization printed dipole antenna with a parasitic element. The antenna has the advantages of broad frequency band, low cross-polarization, stable directional diagram, small size and simple structure. The antenna adopts a double-layer printed dipole way, and meanwhile, rectangular patches are uploaded on the upper end and at two sides of a dipole arm. The broadband low cross-polarization printed dipole antenna has the basic structure as follows: a metal earth plate, two layers of dielectric slabs, strip line feeding balun, a double-layer printed dipole arm, a rectangular patch arranged on the upper end of the dipole arm, rectangular patches arranged at two sides of the dipole arm and an SMA (Small A Type) joint. The greatest innovation of the broadband low cross-polarization printed dipole antenna is that the ultra broadband character and stable directional diagram character are obtained through uploading the parasitic elements in the manner of the rectangular patches on the upper end and at two sides of the double-layer printed dipole arm, 75% of bandwidth can be achieved under the condition that the standing-wave ratio is smaller than 1.5, and meanwhile, the broadband low cross-polarization printed dipole antenna has a stable directional diagram in the bandwidth, low cross-polarization and grain up to 6.1-9.3dBi. The size of the antenna is reasonably changed, i.e., other concrete embodiments of the invention can be formed.

The invention discloses jacquard black-out cloth and a production method thereof. The method sequentially includes steps: firstly, selecting raw materials; secondly, preparing before weaving; thirdly, using a loom for weaving; fourthly, post-finishing; fifthly, checking and packaging, and the like. The jacquard black-out cloth is made of warps and wefts by means of jacquard weaving, the warps include face warps and inner warps, the wefts include face wefts and inner wefts which are made of polyester black yarns, the face warps and the face wefts are interwoven into a face layer, the inner warps serve as a middle layer, and the inner wefts serve as an inner layer. The jacquard black-out cloth reserves characteristics of traditional black-out cloth such as light shading, breathability, softness to touch and the like, new characteristics such as diversity in style, layer evidence, richness in color and the like are added through variation of colors and stitches, fabrics produced by the production method have stable patterns and various functions such as light adjusting, privacy protecting, ornamenting, heat insulating, sun blocking, sound insulating, dust filtrating and the like, production process is simple, environment pollution and energy consumption caused by knurling and printing are reduced, production cost is greatly reduced, and popularization and application of the jacquard black-out cloth and the proeduction method are facilitated.

The invention belongs to the technical field of wireless communication, and discloses a magnetoelectric dipole filter antenna with an approximate elliptical filter response. A feed structure comprisesa coupling groove printed on the upper layer of a double-sided copper-clad dielectric plate, and a fork-shaped microstrip power divider and a U-shaped short circuit branch printed on the lower layerof a double-sided copper-clad dielectric plate with a thickness of 1 mm; the radiation structure includes a radiation patch, a coupling branch, and a vertical short circuit wall; the radiation patch and the coupling branch are respectively printed on the upper layer and the lower layer of a double-sided copper-clad dielectric plate with a thickness of 1.5 mm; and the vertical short circuit wall isprinted on two one-sided copper-clad dielectric plates with a thickness of 0.5 mm. The magnetoelectric dipole filter antenna with an approximate elliptical filter response is realized, and a good filter frequency response is realized. The magnetoelectric dipole filter antenna with the approximate elliptical filter response disclosed the invention greatly expands the application of the magnetoelectric dipole antenna in the field of filter antennas.

The invention discloses a broadband base station antenna based on ring loading and slotting and wireless communication equipment, the broadband base station antenna comprises an antenna radiation unit, a feed balun and a reflecting plate, the antenna radiation unit is arranged above the reflecting plate through the feed balun, the upper surface of a radiation dielectric substrate is provided withfour radiation arms and a coupling square ring, and the four radiation arms are arranged in the coupling square ring. The equipment has the advantages that the structure is simple, the planar structure is realized, and in addition, the height can be greatly reduced through the Balun feed.

The invention discloses a differential feed broadband dual-polarized plane base station antenna. The differential feed broadband dual-polarized plane base station antenna comprises an antenna radiating unit, a reflecting plate and a four-port feed network, wherein the antenna radiating unit is fixed above the reflecting plate through a support column; the antenna radiating unit is of a plane structure, and comprises a dielectric substrate, a first polarized vibrator, a second polarized vibrator and a coupling unit; the first polarized vibrator is etched on the lower surface of the dielectric substrate; the second polarized vibrator is etched on the upper surface of the dielectric substrate; the coupling unit is etched on the upper surface and the lower surface of the dielectric substrate; and the four-port feed network is positioned at the center of the dielectric substrate. The antenna has the advantages of broad bandwidth, high isolation degree, high gain, stable radiation direction pattern, simple and compact structure and the like, is applicable to mobile communication base station antennas, and is easy to be integrated with a differential circuit.

The invention discloses a planar spread spectrum broadband base station antenna comprising a reflection plate and an antenna radiation unit. The antenna radiation unit is fixed above the reflection plate through a support column and comprises four radiation arms, a dielectric substrate and a feeder structure. The two radiation arms form a +45-degreepolarizing oscillator which is fed by a first feeder, and the other two radiation arms form a -45-degree polarizing oscillator which is fed by a second feeder. The four radiation arms are diamond patches printed on a dielectric substrate, and the diamond patches are provided with right-angle gaps. The antenna has the advantages of planar structure, large bandwidth, simple and novel structure and stable radiation pattern.

The invention discloses an ultra-wideband low-profile conformal antenna comprising a plurality of radiating elements and a plurality of virtual units. The radiating units and the virtual units are coupled, adjacent units are tightly connected together, the radiating units are connected to the virtual units through power resistors, both the radiating units and the virtual units are printed on a dielectric substrate, and multiple ports are synthesized by a power splitter in an equal phase and same phase way. An outer side of the conformal antenna is provided with a layer of skin, an inner side is provided with a supporting structure, the supporting structure is provided with a mounting hole, and the conformal antenna is mechanically connected through the mounting hole. The relative bandwidthof the invention can reach 8 times of octave or even wider, the antenna height is only equivalent to 0.22 lambda of a center frequency point and is equivalent to 0.06 lambda of a low frequency, and the directional radiation can be achieved by using a metal plate in a machine body. The antenna directional diagram is stable in an ultra-wideband of 8 octaves, and no distortion such as inclined headand falling pits occurs.

The invention discloses a double-frequency fusion antenna array, a common-mode suppression method and communication equipment, and the antenna array comprises a low-frequency antenna and a high-frequency antenna, the low-frequency antenna and the high-frequency antenna are vertically disposed on a reflection plate, the high-frequency antenna is symmetrically disposed around the low-frequency antenna, and the high-frequency antenna comprises two crossed high-frequency dielectric substrates. One side of each high-frequency dielectric substrate is provided with a high-frequency radiation oscillator, the other side of each high-frequency dielectric substrate is provided with a high-frequency feeder structure, two high-frequency radiation oscillators respectively comprise a high-frequency floorrectangular groove, and one high-frequency radiation oscillator further comprises a high-frequency floor extension structure. The antenna array solves the problem of mutual coupling between differentantennas, and has the advantages of large bandwidth, novel structure and stable radiation pattern.

The invention belongs to the field of wireless communication, and particularly relates to a small broadband differential excitation dual-mode and dual-polarized base station antenna in this field. Theantenna comprises a first dielectric plate, a second dielectric plate a third dielectric plate, a reflection plate, a coaxial connector, a radiation patch, a driving branch and baluns. The first dielectric plate is horizontally arranged at the uppermost layer of the whole antenna; the reflection plate is horizontally arranged at the lowest layer of the whole antenna; the pair of mutually orthogonal baluns are arranged between the first dielectric plate and the second dielectric plate, and the first dielectric plate and the reflection plates are respectively perpendicular to the baluns up anddown; the orthogonal surfaces of the orthogonal baluns are respectively printed with the second dielectric plate and the third dielectric plate to allow the second dielectric plate and the third dielectric plate to be mutually perpendicular to the first dielectric plate and the reflection plate. The small broadband differential excitation dual-mode and dual-polarized base station antenna ensuresthe miniaturization while ensuring the broadband.

The invention discloses a perfume essence added with musk and fruit ester. The perfume essence mainly comprises the following components by mass percent: 15% of methyl dihydrojasmonate, 2% of alpha-hexylcinnamaldehyde, 4% of lilialdehyde, 40% of ambrotone, 2% of phenylethyl alcohol, 1% of dihydromyrcenol, 1% of cinnamic alcohol, 0.01% of leaf alcohol, 0.8% of vanillyl alcohol, 0.02% of linalool, 1% of geraniol, 5% of ethyl linalool, 6% of florol, 0.2% of dodecahydro-3a, 6, 6, 9a-tetramethyl-naphtol [2, 1-b] furan-3a, 6, 6, 9a-tetrame, 10% of musk and fruit ester and the like. The essence added with musk and fruit ester has the characteristics of stable structure, compound aroma, gradually-released fragrance, novel aroma and lasting fragrance.

The present invention discloses a compact-structure-type broad-bandwidth quasi omni-directional antenna. The antenna comprises three dielectric plates, metal structures separately printed on the uppersurface and the lower surface of the three dielectric plates, two groups of symmetrically distributed short-circuit columns arranged between a middle layer dielectric plate and a lower layer dielectric plate and a coaxial inner core used for power feeding. A pair of symmetrically distributed parasitic patches are printed on the upper surface of an upper layer dielectric plate of the antenna. Symmetrically distributed metal patches with rectangular notches are printed on the upper surface of the middle layer dielectric plate, and a rectangular band-shaped monopole antenna is printed on the lower surface of the middle layer dielectric plate. A metal floor is printed on the lower surface of the lower layer dielectric plate. The metal patches on the upper surface of the middle layer dielectric plate are connected with the printed metal floor of the lower surface of the lower layer dielectric plate via the two groups of short-circuit columns, and the monopole antenna on the lower surface of the middle layer dielectric plate feeds power via the coaxial inner core penetrating the floor. The antenna has the advantages of broad bandwidth, small size, compact structure, stable radiation pattern and quasi omni-direction, and the antenna is suitable for the field of wireless communication.

The invention discloses a metal face overlay stone comprising a base material, an elastic coating, a colored intermediate layer, an effect layer and a protective layer. The base materials is coated with the elastic coating, the colored intermediate layer is arranged on the elastic layer by roller coating, the effect layer is formed by spraying multicolor metallic paint on the colored intermediate layer, and the effect layer is coated with the protective layer. The protective layer is nano fluorocarbon paint, the multicolor metallic paint is composed of slurry and 10-15% of multicolor metal power and 45-59% of nano fluorocarbon resin by mass, and the slurry is composed of, by mass, 20-28% of xylene, 8-15% of butyl acetate, 8% of 20% CAB, 0.7% of Levaslip432, 0.4-1% of Disponer904s, 0.6-0.8% of Aisponer912, 0.6-1% of Defom6500 and 2% of 201p. The metal face overlay stone has the advantages of convenience in transportation and construction, stable patterns, smooth hand feeling and fineness and smoothness.

The invention provides a double-ridge open waveguide structure circularly polarized antenna array based on the 3D printing technology, which is manufactured by 3D printing of a dielectric material and electroplating of a metal film, and comprises a coaxial connector, a feed network and at least one antenna unit, and each antenna unit comprises a dielectric block, a ridge waveguide and a transition section which are sequentially arranged from top to bottom. Two ridge structures for converting linear polarization into circular polarization are symmetrically arranged in the ridged waveguide; the feed network is used for feeding the antenna unit; and the coaxial connector is fixedly connected with the feed network. According to the invention, a triangular prism double-ridge structure is used as a waveguide built-in polarizer. According to the design, linear polarization excitation can be converted into circular polarization radiation under the condition that a complex feed network is not introduced and the physical size of the antenna unit is not increased, and the antenna array has the advantages of being simple in structure, convenient to implement and good in working performance.

The invention discloses a broadband integrated balun and an antenna unit, the broadband integrated balun comprises a dielectric substrate, a microstrip line and a metal strip, the microstrip line is arranged on one side of the dielectric substrate, and the metal strip is arranged on the other side of the dielectric substrate; wherein the metal strips are a first metal strip and a second metal strip which are arranged in a coplanar mode, an isolation gap is formed between the first metal strip and the second metal strip, and tooth-shaped gaps are formed in one side, where the isolation gap is formed, of the first metal strip and one side, where the isolation gap is formed, of the second metal strip. The antenna unit disclosed by the invention can realize 2 / 3 / 4 / 5G frequency band (1.7-3.6 GHz) + / -45-degree dual-polarization stable electromagnetic radiation, and has the characteristics of wide working frequency band, high isolation degree and stable radiation pattern.

The invention provides a low-shrinking percentage bright printing adhesive. The low-shrinking percentage bright printing adhesive is prepared from the following raw materials in parts by weight: 20-30 parts of polyurethane acrylate, 12-14 parts of methyl acrylate, 5-7 parts of ethyl acrylate, 4-5 parts of neopentyl glycol, 2-3 parts of isophthalic acid, 3-4 parts of methacrylic acid, 10-20 parts of diethylene glycol mono-ethyl ether acetate, 10-12 parts of ethoxylated trimethylolpropane triacrylate, 1-2 parts of OP-10, 1-2 parts of ammonium persulfate, 4-5 parts of additive and 60-65 parts of water. The ethoxylated trimethylolpropane triacrylate, the methyl acrylate, the polyurethane acrylate and the like are used for carrying out crosslinking modification, so that the adhesive has the advantages of high fastness, wear resistance, adhesive power, flexibility and high peel strength and the characteristics of high brightness and low shrinkage percentage of immobilizing membranes. The low-shrinking percentage bright printing adhesive is used for printing, so that pattern types are stable. The low-shrinking percentage bright printing adhesive is easy to control and simple and convenient to operate and has relatively high economic value.

The invention relates to the field of polyester fiber differentiation, and discloses a preparation method of high-strength low-shrinkage super-bright embroidery thread polyester drawn yarn. The methodcomprises the steps of 1 pre-crystallizing, wherein a polyester chip with the viscosity being 0.70-0.80 dl / g is selected as a raw material, and pre-crystallizing is performed; 2 drying, wherein the raw material is subjected to hot air drying again, the water content is controlled to be smaller than 30 ppm, and then the raw material is fed into a screw extruder; 3 filtering, wherein after the rawmaterial is extruded through a screw, a static mixer is adopted for filtering; 4 spinning, wherein a single hole of a spinneret plate is in a trilobal shape; 5 cooling and oiling; 6 winding forming, wherein filaments obtained after cooling and oiling are stretched through hot rollers, and winding forming is performed after shaping; two pairs of hot rollers are included, wherein one pair of the hotrollers are stretching hot rollers, and the other pair of the hot rollers are shaping hot rollers. The polyester drawn yarn obtained through the method has the advantages of being high in embroidering speed, high in strength and brightness and stable in shape, and producing little fuzziness and broken yarn.

The invention discloses a soft corrosion-resistant printing adhesive prepared from the following raw materials in parts by weight: 35-40 parts of polyester acrylate, 4-5 parts of an emulsifying agent (MP-10), 12-14 parts of epoxypropyl methacrylate, 6-8 parts of 2-ethylhexyl acrylate, 12-15 parts of trimethylolpropane triacrylate, 6-8 parts of toluene diisocyanate, 3-4 parts of fatty alcohol-polyoxyethylene ether, 1-2 parts of ammonium persulfate, 4-5 parts of an auxiliary agent and 60-65 parts of water. According to the soft corrosion-resistant printing adhesive disclosed by the invention, trimethylolpropane triacrylate, epoxypropyl methacrylate, polyester acrylate and the like are used for performing crosslinking modification to ensure that the adhesive has the advantages of good crockfastness and fastness to washing, yellowing resistance, strong adhesive force, softness and corrosion resistance; when the adhesive disclosed by the invention is used for printing, the pattern is stable, is easy to control and difficult to contaminate a silk screen, and the operation is simple and convenient, so that the adhesive has a high economic value.

The invention discloses a differential feed dual-frequency planar antenna, which comprises a reflecting plate, a supporting structure, a first feed line, a second feed line, a dielectric substrate andan antenna radiation unit, wherein the dielectric substrate is fixed on the reflecting plate through the supporting structure; the first feed line and the second feed line are connected with the reflecting plate and the dielectric substrate; the antenna radiation unit is etched on the dielectric substrate and comprises a first bowtie oscillator, a second bowtie oscillator, a first long arm oscillator, a second long arm oscillator and a microstrip feed structure; the first bowtie oscillator and the second bowtie oscillator are symmetrical; the first long arm oscillator and the first bowtie oscillator are connected; the second long arm oscillator and the second bowtie oscillator are connected; the first long arm oscillator and the second long arm oscillator are symmetrical; and the microstrip feed structure is connected with the first bowtie oscillator and the second bowtie oscillator. The differential feed structure is adopted to be combined with a plane structure, combination with thedifferential radio frequency front end is facilitated, dual-frequency work is realized, the gains are high, and a radiation pattern is stable.

The invention relates to a jacquard mechanism of a multifunctional tufted carpet weaving machine, comprising an electromagnetic clutch, a stepping motor and a servo motor, wherein a servo motor set (1) is connected with a jacquard driving shaft (3) through a clutch (2); the jacquard driving shaft (3) is connected with an active part (11) of an electromagnetic clutch set (5) through a key; a spring plate (9) and an armature iron (10) of the electromagnetic clutch set (5) are connected with a jacquard wheel (4) and are sleeved on the jacquard driving shaft (3); and a driving wheel (6) is meshed with the jacquard wheel (4) in a jugged way and is in one-way driving connection with a stepping motor set (8) through an overrun clutch (7). The invention integrates a jacquard control technology of three tufted carpet weaving machines which are commonly used at present in a same jacquard mechanism, and the equipment can realize on-line switching in real time by different jacquard control ways through the design of a mechanism and the use of the overrun clutch, thereby fully exerting the respective advantage of different jacquard technologies.

The invention discloses a dual-polarization base station antenna based on shared symmetrical array arms, the antenna comprises a dielectric plate, four microstrip feeder wires are printed on the top surface of the dielectric plate, the four microstrip feeder wires are respectively arranged along two diagonal lines of the dielectric plate, four shared array arms are printed on the bottom surface ofthe media plate, the four shared array sub-arms are respectively located at positions opposite to the four microstrip feed wires on the bottom surface of the dielectric plate, a microstrip feed wireand an opposite shared array sub-arm are connected with one end of a coaxial cable, and an antenna reflector plate in the horizontal direction is arranged directly below the dielectric plate. The antenna disclosed by the invention shares one polarized symmetrical array sub-arm with another orthogonally polarized symmetrical array sub-arm, realizes two radiation with different polarizations respectively, can greatly reduce antenna radiator size and antenna profile, and has the advantages of stable frequency bandwidth, gain and wave lobe width, etc.

The invention discloses a broadband dual-frequency fusion antenna based on a reflection surface and communication equipment. The broadband dual-frequency fusion antenna comprises a reflection plate, a low-frequency antenna radiation unit, a metasurface structure and a high-frequency antenna radiation unit, wherein the high-frequency antenna radiation unit is arranged above the reflection plate, the low-frequency antenna radiation unit is arranged above the high-frequency antenna radiation unit, and the metasurface structure is located above the high-frequency antenna radiation unit. The broadband dual-frequency fusion antenna is novel in structure, high in isolation degree and stable in directional diagram.

The invention provides a high-temperature-endurance pigment printing binding agent. The binding agent is prepared from the following raw materials in parts by weight: 20-25 parts of polyether acrylate, 2-3 parts of N-(isobutoxymethyl)acrylamide, 13-16 parts of 2-(methacryloyloxy)ethyl acetoacetate, 12-15 parts of ethoxylated trimethylolpropane triacrylate, 7-9 parts of propoxylate neopentylene glycol diacrylate, 3-4 parts of butyl acrylate, 10-12 parts of triglycidyl isocyanurate, 2-3 parts of polyoxyethyleneoctylphenyl-10, 5-6 parts of methacrylic acid, 1-2 parts of ammonium persulfate, 4-5 parts of auxiliaries, and 50-55 parts of water. The binding agent has the characteristics of high temperature endurance, weather endurance, arc endurance and self-extinguishment, has excellent flexibility and a low shrinkage rate of immobilized membranes; pigment adopting the binding agent is simple in printing process, strong in color, clear in profile, stable in printing form and good in fastness, and has a wide development prospect.

Provided is a technology for making a dianthus caryophyllus crystal flower. All petals of dianthus caryophyllus are pushed aside and separated through tweezers, so that the whole flower is kept in a fully spread state; under the circumstance that the original shapes of the petals are not damaged, drying is carried out through the method that embedding drying by drying agents and drying by a microwave oven are combined, the drying efficiency can be greatly improved through the method, and the dried petals are made into a stereoscopic dry dianthus caryophyllus flower; the surface of the dried stereoscopic dianthus caryophyllus flower is coated with a layer of protecting film through crystal glue, water factors in the air are prevented from influencing the flower, and therefore the stereoscopic dianthus caryophyllus crystal flower which is stable in flower form, not liable to discoloration caused by moistening and high in ornamental value and has certain crystal texture glossiness is obtained. The technology is simple and convenient to implement, low in investment, short in period, suitable for dianthus caryophyllus in various colors and capable of being used for do-it-yourself (DIY) making of dianthus caryophyllus artware, the requirement of customers for DIY making of dried flowers and crystal flowers of dianthus caryophyllus is met, and the commercial value of the dianthus caryophyllus on the market is increased.

The invention discloses a three-dimensional drying and shape-fixing technology for iris, wherein embedding drying of drying agents is combined with microwave drying, so that the drying efficiency is greatly improved; the surface of each dried petal is covered with a protective film by dripping crystal on the surface so as to prevent moisture factors in the air from influencing the flower material, and thereby the three-dimensional dried iris which is stable in flower shape and unlikely to be affected with damp and discolor, and has certain toughness and glossiness and high ornamental value is obtained. The three-dimensional drying and shape-fixing technology for iris is simple, convenient and easy to implement, short in period, and applicable to various kinds of iris, can be used for manufacturing three-dimensional dried iris, enlarges the application range of the iris, and enriches the flower material varieties of the dried flower market.

The broadband compact circularly polarized antenna comprises an annular metal structure printed on the upper surface of a dielectric substrate and a T-shaped metal structure printed on the lower surface of the dielectric substrate, and a T-shaped opening gap is etched in the annular metal structure on the upper surface of the dielectric substrate; the upper surface of the dielectric substrate outside the T-shaped opening gap is provided with a port a, and the tail part of the T-shaped metal structure is provided with a port b; the coaxial line inner core and the outer conductor are respectively connected with the metal structures at the two sides of the port a to realize the feed of the port a; the T-shaped metal structure on the lower surface of the dielectric substrate and the annular metal structure on the upper surface of the dielectric substrate are respectively connected to realize the feed of the port b; the antenna can realize circular polarization radiation when the port a and the port b carry out equal-amplitude in-phase feeding. The antenna integrates miniaturization and broadband of a circularly polarized antenna, has the advantages of wide frequency band, small size, compact structure, stable directional diagram, bidirectional radiation and the like, and is suitable for realizing broadband circularly polarized radiation of the antenna in the field of wireless communication.

The invention discloses a low-profile ultra-wideband log-periodic antenna unit, and aims to provide a log-periodic antenna unit with narrower high-frequency directional diagram beams and higher gain.According to the technical scheme, logarithmic long oscillator arm matching branches of the ultra-wideband printing logarithmic periodic planar dipole are printed on the two sides of the axial symmetry center line of a collection line in a staggered mode respectively, and a radio frequency coaxial cable penetrates through an outer conductor to be supported on the center line of a dielectric substrate in a suspended mode. The outer conductor realizes impedance matching through a patch resistor configured at the longest oscillator end of the wide-edge assembly line terminal of the dielectric substrate, and a gradient refractive index lens fixedly connected with a narrow-edge planar dipole loads standing wave characteristics of the log-periodic antenna and focuses high-frequency wave beams torealize pitching surface wave beams which only converge the high-frequency wave beams; after feeding, the electromagnetic energy is transmitted along the assembly line, oscillators in anexcitation area are excited in sequence, the guided waves propagated on the transmission line are converted into unbounded media to be propagated, and 360-degree uniform radiation is shown on a horizontal directional diagram.

The invention discloses a low-sidelobe sharp-cutoff flat-topped wave beam base station antenna and a design method thereof. The low-sidelobe sharp-cutoff flat-topped wave beam base station antenna is characterized in that a dual-polarized base station antenna with low-sidelobe level and sharp-cutoff characteristic is systematically designed based on a multi-target optimization algorithm; and unit selectivity at different frequency bands is introduced for obtaining directional diagram stability in a wide frequency band. The low-sidelobe sharp-cutoff flat-topped wave beam base station antenna is advantageous in that the low-sidelobe sharp-cutoff flat-topped wave beam base station antenna can satisfy technical requirements in a low frequency band and a high frequency band or the technical requirement in the wide frequency band by means of a certain specific unit. The low-sidelobe sharp-cutoff flat-topped wave beam base station antenna has advantages of small dimension and simple design. The design method of the invention can be flexibly used in a wireless communication system with a different-form signal coverage requirement.

The invention discloses a differential feeding three-frequency planar antenna. The differential feeding three-frequency planar antenna comprises a reflection plate, a support structure, a dielectric substrate, a first feeder, a second feeder and an antenna radiation unit, wherein the reflection plate is a base, the dielectric substrate is fixedly arranged on the reflection plate by the support structure, the support structure comprises M support posts, the support posts are insulation materials, and the antenna radiation unit is etched on the dielectric substrate and comprises a low-frequencyoscillator, a first medium-frequency oscillator, a second medium-frequency oscillator, a first high-frequency oscillator, a second high-frequency oscillator, a coplanar microstrip line and a microstrip line feeding structure. The differential feeding structure is employed and combined with a planar structure, combination with a differential radio frequency front end can be facilitated, three-frequency working is achieved, and the differential feeding three-frequency planar antenna has the advantages of high gain and stable radiation pattern.

The invention belongs to the field of wireless communication, and particularly relates to a broadband dual-polarization filter antenna in the field, which can be used for 5G base station applications. It is characterized in that it includes a first dielectric board, a second dielectric board, a third dielectric board, a fourth dielectric board, a fifth dielectric board, a radiation patch, a parasitic metal ring, a first short-circuit wall, a second short-circuit wall, and a third short-circuit wall. The short-circuit wall, the fourth short-circuit wall, the reflector and the microstrip power divider; the first dielectric plate is placed horizontally on the top layer of the antenna body; the reflector plate is placed horizontally on the bottom layer of the antenna body, and the center of the reflector plate is etched with a cross slot; There are four short-circuit walls placed symmetrically at the center between the first dielectric board and the reflector; the first dielectric board and the reflector are perpendicular to the short-circuit walls respectively; the radiation patch and the parasitic metal ring are printed on the lower surface of the first dielectric board, The radiation patch is connected with one end of the four short-circuit walls; the other end of the short-circuit wall is connected with the corresponding position of the reflector; the microstrip power divider is printed on the bottom of the reflector. It ensures the dual-polarization filter response of the antenna while ensuring the broadband.