53results about How to "Improve out of roundness" patented technology

The invention discloses a multi-frequency dual-polarized omnidirectional antenna and relates to the technical field of dual-polarized omnidirectional antennas. The multi-frequency dual-polarized omnidirectional antenna comprises upper and lower two microstrip antenna arrays, an asymmetric bi-conical antenna, a multiplexer, a side feed structure and an antenna radome, wherein the upper and lower two microstrip antenna arrays are parallel to each other and are arranged at the top and the middle of the asymmetric bi-conical antenna separately; the multiplexer is arranged at inner side of the bottom of the asymmetric bi-conical antenna; and the side feed structure is arranged on the side of the whole antenna and connected with upper and lower two microstrip antenna array feed points and two output ports of the multiplexer separately. The multi-frequency dual-polarized omnidirectional antenna covers 2 / 3 / 4G and WLAN and Wi-Fi working bands, and has multi-frequency vertical and horizontal dual-polarized omnidirectional radiation functions. The upper microstrip antenna array is arranged at the top of the asymmetric bi-conical antenna to form orthogonal arrangement; the asymmetric bi-conical antenna is arranged at the center of the lower microstrip antenna array to form cored orthogonal arrangement. According to a structure combination method, the isolation degree between a vertically polarized port and a horizontally polarized port in a full band can be significantly improved and the operation bandwidth of the antenna is improved.

The invention discloses a ridge waveguide planar array antenna employing mechanical center feeding. The ridge waveguide planar array antenna comprises a grid layer, a radiation layer, a coupling layer, a feed network layer and a center feed layer, which are sequentially stacked, wherein the mechanical center of the center feed layer is provided with a feeding opening which is vertical to an antenna array and is used for inputting and outputting a signal; the feed network layer is composed of a single ridge waveguide; and ridges are arranged at the centers of narrow sides of various branches of a ridge waveguide power divider on the feed network layer. Through introducing the grid layer and the center feed layer, adopting the design of a ridge waveguide power dividing network, and successfully combining with other structure layers, the targets of improving the out-of-roundness of an antenna radiation pattern, improving the antenna standing wave bandwidth and realizing mechanical center feeding of the antenna are achieved.

Provided are a common-grounded edge rippled horizontal polarization broadband omnidirectional antenna array and an adjusting method of the common-grounded edge rippled horizontal polarization broadband omnidirectional antenna array. The antenna array comprises a circular dielectric slab, a power divider feed network, a public circular ring metal ground and an arc-shaped printed dipole array, wherein the circular dielectric slab is provided with a hole in the center, the power divider feed network is arranged on one surface of the circular dielectric slab and comprises a one-to-n eccentric equiamplitude same-phase power divider network and n feed microstrip lines, the public circular ring metal ground is arranged on the other surface of the circular dielectric slab and is concentric with the circular through hole, the arc-shaped printed dipole array is arranged on the other surface of the circular dielectric slab and composed of n arc-shaped printed dipoles which are evenly distributed in a circular ring shape, the middle of each arc-shaped printed dipole is connected with the public circular ring metal ground, and slits are formed in each arc-shaped printed dipole. According to the common-grounded edge rippled horizontal polarization broadband omnidirectional antenna array and the adjusting method for the common-grounded edge rippled horizontal polarization broadband omnidirectional antenna array, grooves are formed in the outer edge of each arc-shaped printed dipole, the outer edge of each arc-shaped printed dipole is made to be in a concave-convex rippled shape, and the out-of-roundness of radiation patterns of antennas is relieved.

The invention provides a mini enhanced dual-polarization omnidirectional ceiling antenna. The antenna comprises a single cone, a horizontal polarization unit and a step-shaped floor which are arranged in a vertically coaxial and centrally overlapped manner from top to bottom successively, the single cone comprises a first single cone radiator and a second single cone radiator which are arranged in a crossing manner, the bottom of the single cone is provided with a feed point, and a coaxial feed cable is connected to the feed point in the bottom of the single cone by penetrating the step-shaped floor and the horizontal polarization unit from bottom to top successively. Within the frequency range from 0.8GHz to 2.70GHz, the single-cone ceiling antenna realizes effective impedance match, an ideal omnidirectional radiation performance, a substantial edge coverage enhanced effect, a consistent in-band coverage range, higher efficiency, higher port isolation degree (better than -24dB), small size and low profile and is suitable for indoor coverage. The antenna is also characterized by being novel in ideas, clear in principles, universal in methods, easy to realize, low in cost and suitable for batch production, the antenna can be used to replace a routine dual-polarization omnidirectional ceiling antenna, and can be used for design and improvement of a vertical-polarization enhanced omnidirectional ceiling antenna and a planar Alford loop antenna.

A central symmetric horizontally-polarized broadband omnibearing array antenna comprises a round dielectric plate, wherein a power division feed network is arranged on a surface of the round dielectric plate, a common disc metal ground is arranged on the other surface of the round dielectric plate and outwards extends to form a circular metal foil, the circular metal foil is uniformly partitioned into four circular arc printing dipoles by a first radial gap, a second radial gap, a third radial gap and a fourth radial gap which are arranged on the circular metal foil, a radial intermediate gap is formed on each circular arc printing dipole and arranged on a radial symmetric central line of the circular arc printing dipole, a radial rectangular coupling branch is arranged in each radial gap, arc gaps are connected to the inner side ends of the radial gaps, all arc gaps are concylic by taking the center of the common disc metal ground as a circle center, an arc guide branch is arranged on the outer side of each radial gap, and all arc guide branches are arranged on a circumference taking the center of the common disc metal ground as the circle center.

The invention relates to a high-strength spring steel wire machining method for an automobile bearing spring. The raw materials comprise carbon, silicon, manganese, phosphorus, sulfur, copper, nickel, chromium, molybdenum and iron. According to the high-strength spring steel wire machining method for the automobile bearing spring, a wire rod made by mutual cooperation between various assemblys and content thereof is very excellent in decarburization layer depth, non-metallic inclusion, surface quality, mechanical property and the like; after the wire rod is subjected to acid pickling and phosphatizing, the cold drawing is conducted on the wire rod, and a semi-finished product meeting the outer diameter requirements is formed; then a finished product is made through quenching, tempering and other working procedures; the calibrating straight length, the quenching temperature, the tempering temperature and the turning speed during the drawing process are chosen carefully, so that the wire diameter stability, the non-circularity, the tensile strength, the face shrinking rate and the like of the finished product are all higher than those of a finished product prepared through a traditional oil-quenching tempering spring steel wire technology.

The invention relates to a wire rope composite fiber core and a production method and application thereof. The wire rope composite fiber core is formed by singly twisting multiple composite fiber cores; the single strand of each composite fiber core includes a jute main core and a polypropylene outer core; multiple polypropylene yarns form the polypropylene outer core evenly covering the outer side of the jute main core. The jute yarn is used to replace sisal yarn to produce the wire rope core, and the problem of high core diameter fluctuations is avoided; the jute core has uniform diameter and good oil absorption, and operational vibration and noise of an elevator are effectively relieved; yarn fracture rate of a whole rope is better than that of a rope with a sisal core; by using the composite structure of the polypropylene yarn outer core twisted to the jute main core, the defect that the jute fiber is less than sisal fiber in fiber strength, and the strength of the composite fibercore is better than that of the sisal core.

The invention relates to a novel double-compacted steel wire rope and a production technology thereof, and aims to provide a steel wire rope which is stable in physical property and is compacted tightly as well as a production technology of the steel wire rope. All pickled and phosphatized steel wires are drawn for the first time, then annealed, dried and drawn again after dried, and various finished steel wire products are formed. Third center steel wires, inner-layer steel wires, filling steel wires and third outer-layer steel wires are twisted and then rolled, steel wire rope first outer-layer strands are produced and twisted on the outer side of a rope core in a wrapping manner, a steel wire rope is twisted, the twisted steel wire rope is forged, and the forged steel wire rope is warehoused. The section area of each steel wire rope first outer-layer strand after rolling is 8%-10% smaller than that before rolling, and the section area of the steel wire rope after forging is 10%-13% smaller than that before forging. The rope core adopts 7*7 independent steel cores.

The invention discloses a manufacturing method of austenitic stainless steel [section sign]150 small-specification continuously-cast circular tube blanks, and relates to the field of stainless steel production processes. The manufacturing method includes the specific preparation process of production in an electric arc furnace; AOD, LF, continuous casting; finishing; and delivery. According to themethod, on one hand, the smelting process is optimized, it is guaranteed that molten austenitic stainless steel can achieve the high-cleanliness metallurgical quality, and while the oxygen content and the inclusion content in steel are reduced, the situation that high-melting-point aluminum oxide is gathered on a continuous casting tundish water gap to affect continuous casting pouring is reduced. On the other hand, reasonable continuous casting process parameters are determined, and reasonable primary cooling water and secondary cooling water preparation parameters, crystallizer vibration parameters, covering slag types, pouring temperature, withdrawal speed, withdrawal and straightening machine pressure, electromagnetic stirring parameters and the like are formulated. Secondary oxidization is reduced in the pouring process, and contamination of the molten steel is reduced. The continuously-cast circular tube blanks produced with the method can be directly subjected to tube penetration, round steel forging and rolling procedures are reduced, the productivity can be greatly improved, and the production cost is reduced.

The invention discloses an improved structure of a wideband omnidirectional antenna, which comprises a shunt-fed wideband feed network and a plurality of groups of wideband vibrator sets connected with the shunt-fed wideband feed network, wherein all wideband vibrator sets respectively comprise first radiator, second radiator and parasitical vibrator which are sequentially arranged; choking tubesare respectively arranged on the heads and the ends of all wideband vibrator sets; the first radiators, the second radiators, the parasitical vibrators and the choking tubes are respectively in collinear connection and fixed on a metal support tube; an inner conductor of a coaxial feeder of the shunt-fed wideband feed network is respectively and electrically connected with the first radiators or the second radiators of various wideband vibrator sets; and an outer conductor of the coaxial feeder is electrically connected with the metal support tube. The improved structure has the advantages that: as the radiators, the parasitical vibrators, the choking tubes and the metal support tubes are collinearly arrayed and the coaxial feeder is integrated inside the radiators, the unroundness of theantenna is good and the small-sized integration of the antenna volume is realized while meeting wideband low standing wave and the shunt-fed wideband feed network improves the signal quality of the covering area while resisting the interference.

The invention discloses a vertical polarization omni antenna. The vertical polarization omni antenna comprises a base plate, a monopole, a coaxial cable and a short circuit paster. The monopole comprises a first center part and a plurality of first radiation parts. The inner end of each first radiation part is connected with the first center part, each first radiation part extends in the direction far away from the first center part, and the monopole is arranged above the base plate. The short-circuit paster comprises a second center part, a plurality of second radiation parts and a plurality of connecting parts, wherein the inner end of each second radiation part is connected with the second center part, each second radiation part extends in the direction far away from the second center part, the connecting parts are correspondingly connected with the second radiation parts in a one-to-one mode, each connecting part is connected with the base plate, and the short-circuit paster is arranged above the monopole and separated from the monopole. The vertical polarization omni antenna has the advantages of being small in size, simple in structure, easy to machine, low in cost, good in out-of-roundness and cross polarization index, very wide in working frequency band and the like.

The invention discloses an ultra wide band horizontal polarized horizontal omnidirectional antenna, comprising at least three arms integrated antenna elements. The arms integrated antenna elements comprises a folded dipole element and a parallel feeder. The folded dipole element comprises two inverted U shaped conductor sheets that are mirror symmetric as the upper arm and the lower arm. The right ends of the two inverted U shaped conductor sheets are connected by bent portion. The left ends of the two inverted U shaped conductor sheets are disconnected and respectively connected with one of two parallel feeders. The at least three arms integrated antenna elements are rotationally distributed around a center point. The parallel feeder converges at the center point. The center point is a feed point. The ultra wide band horizontal polarized horizontal omnidirectional antenna utilizes a folded dipole as a radiation element, in order to obtain the high impedance and fed and broadband after arraying and parallel feed. The ultra wide band horizontal polarized horizontal omnidirectional antenna increases gains significantly, optimizes the maximum radiation direction, puts up and down into the ideal level, obtains better cross polarization ratio and improves efficiency significantly. The ultra wide bandwidth simplifies the design of feed network, and is more convenient to debug and optimize.

The invention discloses an omnidirectional radiation vibrator array antenna for loaded coupled feeding, which relates to an omnidirectional radiation vibrator array antenna and is used for solving the problems of small bandwidth, low unit electrical length gain and poor omni-directivity existing in the conventional omnidirectional antenna. The front face of a medium plate 1 is printed with two groups of vibrators, a coplanar waveguide central feeder line, a feeding port matching branch knot and radiation terminal load; the upper end of the coplanar waveguide central feeder line is connected with the radiation terminal load, and the lower end of the coplanar waveguide central feeder line is connected with the feeding port matching branch; two groups of vibrators are arranged one above the other; each group of vibrators comprises a left side vibrator, a right side vibrator and two loaded horizontal metal strips; the left side vibrator and the right side vibrator are arranged symmetrically on both sides of the coplanar waveguide central feeder line; the two loaded horizontal metal strips are arranged symmetrically on the outer sides of the left side vibrator and the right side vibrator; the two ends of an upper horizontal feeder line are connected with two metallized through holes above respectively; and the two ends of a lower horizontal feeder line are connected with two metallized through holes below respectively. The omnidirectional radiation vibrator array antenna belongs to a printed antenna for communication.

The present invention discloses a mobile communication antenna device. The device includes: a monopole antenna, placed on one side of a printed circuit board, where a distance between the monopole antenna and a central position of the printed circuit board is less than a threshold, and the monopole antenna includes a first metal sheet which is vertical to the printed circuit board, and is conducted with a circuit of the printed circuit board through a feedpoint. The present invention also discloses a mobile communication terminal device. By adopting the present invention, an ultra wideband antenna may be achieved, thereby making it possible that a mobile communication terminal device product, such as a fixed station, supports more frequency bands.

The invention relates to an indoor distribution antenna. The antenna is characterized by comprising a horizontal polarization radiation unit, the horizontal polarization radiation unit is composed of two parts located on the top surface and the bottom surface of a dielectric plate, the bottom surface part comprises a circular patch, four pairs of inverted L-shaped patches, four T-shaped patches and four parasitic patches, the top surface part is provided with a one-to-four power divider; and the antenna further comprises a vertical polarization radiation unit which comprises eight E-shaped patches, a circular hollow patch and four metal sheets connected with the circular hollow patch and the horizontal polarization radiation unit. The indoor distribution antenna has the characteristics of low cross polarization level, high port isolation, low out-of-roundness, high gain and low profile.

The invention relates to a coupled feeding inverted F antenna which comprises a bottom plate, an insulating cover and an antenna body. The antenna body is sealed and packed on the bottom plate through the insulating cover. The antenna body comprises a left radiating body and a right radiating body, wherein the left radiating body and the right radiating body are oppositely and symmetrically arranged. The outer lateral edge of a left radiator is supported by the bottom plate in an insulating mode, a coupled feeding piece supported by a feeding rod is arranged under the middle of the left radiator, the coupled feeding piece and the left radiator are arranged and coupled in parallel, the feeding rod is connected with a feeding opening under the bottom plate, and the inner lateral edge of the left radiator is supported by the bottom plate through a ground connection column and penetrates through the bottom plate to be outwards connected with the ground. The outer lateral edge of a right radiator is supported by the bottom plate in an insulating mode, a coupled ground connection piece supported by a ground connection rod is arranged under the middle of the right radiator, the coupled ground connection piece and the right radiating body are coupled and arranged in parallel, the ground connection rod is connected with a ground connection opening under the bottom plate, and the inner lateral edge of the right radiator is supported by the floor through the ground connection column.

The invention relates to a dual-polarized high-isolation indoor distribution antenna. The antenna is characterized by comprising a vertical polarized antenna which comprises two semicircular copper sheets perpendicular to each other and a circular copper sheet located above the semicircular copper sheets, and feeds through a feed hole located in the center of a dielectric plate; the antenna further comprises a horizontally polarized antenna which is composed of two parts located on the upper surface and the lower surface of the dielectric plate, four printed dipoles, four arc parasitic patches and four metal strips are arranged on the upper surface of the dielectric plate, a one-to-four power divider is arranged on the lower surface of the dielectric plate, and a dumbbell-shaped structure formed by gaps and rectangular holes is arranged in the middle of the printed dipoles. The indoor distribution antenna can cover the frequency bands of 1.71 GHz to 2.69 GHz and 3.3 GHz to 3.6 GHz at the same time, is applied to 3G / LTE / 5G, and has the characteristics of high port isolation, low out-of-roundness and low profile.

The invention discloses a wearable steel ball for producing ore pulp in a mine, and a preparation method thereof. The wearable steel ball is obtained in the mode that molten iron is subjected to the steps of molten steel smelting, deoxidation alloying, molten steel LF refining, molten steel casting, steel billet heating, rolling, reducing / sizing, flying shear double dimension segmentation, cooling, shear to length, wearable steel round rod product forming and ball manufacturing. The produced wearable steel ball for producing the ore pulp in the mine has the advantages of being high in surfacehardness (the Rockwell hardness HRC is 46-50), good in wearable property, excellent in impact-resistant and crack-resistant property (carbon is moderate), long in service life and the like.

The invention provides a satellite navigation antenna which comprises a first printed symmetrical dipole circuit board and a second printed symmetrical dipole circuit board. Two printed symmetrical dipole circuit boards are orthogonally arranged on a grounding plane printed circuit board to form an orthogonal polarization antenna. The bottom layer of each printed symmetrical dipole circuit boardsis a downdip symmetrical dipole, and the top layer is a microstrip balun. The top layer of the grounding plane printed circuit board is a grounding plane, and the bottom layer is provided with an antenna feed network. The satellite navigation antenna uses the printed symmetrical dipoles as antenna radiation units, and has the advantages of light weight and low cost.

The invention relates to the field of double-frequency antennas, particularly to a double-frequency omnidirectional dipole antenna, and solves the problems of double-frequency bandwidth and out-of-roundness and efficiency of an omnidirectional directional diagram of an antenna horizontal plane in the prior art. The antenna comprises a microwave dielectric substrate, which comprises an edge gap anda feed gap and is of a bilateral symmetry structure, wherein the left and right planes are divided into fixed area areas, metal patches are symmetrically arranged on the left and right planes, the antenna has a high-frequency-band working frequency band and a low-frequency-band working frequency band, the absolute value of S11 of the low frequency band is smaller than -10 dB, the impedance bandwidth is 4.1%, namely 2.4 GHz to 2.5 GHz, the absolute value of S11 of the high-frequency band is smaller than -10dB, and the impedance bandwidth is 18%, namely 5GHz-6GHz. The dual-frequency omnidirectional dipole antenna disclosed by the invention is in horizontal omnidirectional radiation, the dual-frequency bandwidth and the out-of-roundness and efficiency of an omnidirectional directional diagram of the horizontal plane of the antenna are effectively improved, the structure is simple, and the production and maintenance costs are reduced.

The invention discloses a Ka-waveband double-reflection circularly-polarized one-dimensional 360 DEG covering antenna which adopts a double-reflection rotational symmetry structure and consists of a rotational parabolic reflector, a rotational table reflector, a circular polarizer, hard support foam and a flange. The rotational table reflector and the circular polarizer are processed integrally and arranged near a focus of the rotational parabolic reflector for feeding. An incident wave enters the circular polarizer through rectangular waveguide to form a circularly polarized wave, emitted to the rotational parabolic reflector and reflected by the rotational parabolic reflector and the rotational table reflector to realize 360DEG wave beam covering in a horizontal plane and minus 10 DEG to 30 DEG in a pitching plane. The one-dimensional 360 DEG covering antenna has the advantages of good electrical properties such as good non-circularity, great bandwidth, small echo and high gain, is compact in structure, low in cost, easy to process and applicable to vehicle-mounted communication systems.

The invention discloses a response combined antenna compatible with omnidirectional communication and satellite navigation, and aims to provide a combined antenna which is smaller in height, strong inanti-interference capability, high in transportability and compatible with navigation and communication response functions. The combined antenna is realized through the following technical scheme: anavigation system antenna is fixed in a cylindrical cavity and comprises a multilayer microstrip antenna and an amplifying circuit module which are connected in sequence, a response antenna is composed of vertical plates which are vertically and fixedly connected to the surface of a base plate and distributed around a shielding cylinder in a circular array mode, folding oscillators respectively fixed on the vertical plates and a power divider assembled with a bottom plate interlayer of a lower base plate, and the power divider feeds the folding oscillators through the bottom plate interlayer;the amplifying circuit module amplifies and filters each path of radio frequency signals from the multilayer microstrip antenna, and the radio frequency signals of the satellite navigation antenna areoutput after the radio frequency signals are combined by a multiplexer in the amplifying circuit module. According to the invention, the satellite antenna or the response antenna can be replaced according to different application platform requirements so as to meet multi-platform application.

The invention relates to a millimeter wave omnidirectional circularly polarized antenna based on a circularly polarized loudspeaker. The millimeter wave omnidirectional circularly polarized antenna comprises a millimeter wave circularly polarized loudspeaker, and is characterized by further comprising a metal conical reflective face and the millimeter wave circularly polarized loudspeaker. An output end of the millimeter wave circularly polarized loudspeaker is a standard BJ320 waveguide, and an input mode is a TE10 mode which can be converted into a TE11 mode through a rectangular-circularly convertor. A circular polarization device respectively presents the capacitive function and the inductive load function to a perpendicular electric field vector and a horizontal electric field vector so that phases of the two vectors are lagged and lead, and the fact that waves radiated from an expanded T-shaped metal table has a good circularly polarization characteristic is guaranteed. The circularly polarized waves are radiated on the metal conical reflective face, the main radiation direction of the waves is changed from the axial direction to the radial direction, the direction of the radiation waves rotates reversely, the circularly polarization characteristic is not changed, but the radiation waves are omnidirectional, and circularly polarized radiation in a large angle range on a pitch face is achieved.

The invention provides a broadband vertical polarization omnidirectional array antenna with an adjustable unit number. The antenna comprises an omnidirectional transmission array and a power divider,wherein the omnidirectional transmission array and the power divider are perpendicular to each other and are connected through a metal wire, the omnidirectional transmission array is a cylindrical transmission array formed by uniformly distributing N identical directional transmission arrays along the central axis of the omnidirectional transmission array, and each directional transmission array is formed by vertically arranging eight eight-mesh antenna units which are further connected through a one-to-eight combined power divider. The antenna is advantaged in that the antenna is arranged onfixed or mobile wireless communication equipment through equipment, can be used for mutual communication in a mobile communication system, a future vehicle-mounted navigation system, an unmanned aerial vehicle system and other communication systems, and has advantages of wide band, high gain, excellent out-of-roundness, easiness in processing, low cost, simple structure and the like.

The invention relates to a miniature planer ultra-wide-band antenna. The miniature planer ultra-wide-band antenna comprises a dielectric substrate, a gap, a micro-strip feeder and an SMA radio frequency connector, wherein the dielectric substrate is an FR4 sheet material with the relative dielectric constant of 4.4; the gap is a circular flat groove with the diameter of 20 to 24 mm remaining after a circular metal layer on the upper surface of the dielectric substrate is removed; a broken corner is formed in the horizontal direction of a circle, the peak of the broken corner is on the horizontal diameter of the circle, the semi-diameter a of the broken corner is equal to 11 to 15 mm, and the angle theta of the broken corner is equal to 13 to 17 degrees; a rectangular blind opening is formed in the lower end of the circle downwards along the vertical diameter; the distance between the intersection point of the rectangular blind opening and the circle and the bottom end face of the dielectric substrate is 11 mm; a strip metal micro-strip feeder is arranged on a vertical center line on the other surface of the dielectric substrate from the bottom end face upwards; the size of the micro-strip feeder meets the requirement of 50 Omega; the SMA radio frequency connector is fixed on the micro-strip feeder; and a metal layer of the dielectric substrate is grounded. The miniature planer ultra-wide-band antenna has compact in structure and small in size, is easy to microwave integration, meets the requirement of an ultra-wide-band wireless communication system for antenna radiation characteristic, and can serve as a transceiving antenna of a miniature ultra-wide-band system.

A single-polarization low-out-of-roundness indoor distribution antenna comprises a top radiation unit, a vertical polarization radiation unit and a grounding plate. The vertical polarization radiation unit comprises a plurality of radiation patches which are distributed in a circumferential array by taking the center of the grounding plate as a circle center, and each radiation patch is arranged in an extending manner along the vertical direction; the outer side of each radiation patch is provided with at least one notch; the top radiation unit comprises a first circular patch and a second circular patch which are arranged up and down; by means of the six radiation patches distributed in the circumferential array, the out-of-roundness of the antenna is improved while the high-gain radiation characteristic of the antenna is maintained, and the frequency resonance points of the antenna are increased and the bandwidth is expanded by forming the two notches in the radiation patches; the out-of-roundness of vertical polarization radiation is improved through the first circular patch and the second circular patch which are arranged at an interval; impedance matching of the antenna is improved through the arc-shaped hole of the grounding plate, and good omnidirectional radiation characteristics of the antenna are maintained.

The present invention relates to a communication antenna. The communication antenna comprises a first radiator and a second radiator. The first radiator includes a first substrate and a first radiation fin arranged on the first substrate; the second radiator includes a second substrate and a second radiation fin arranged on the second substrate; the first radiator has a first feed portion and a second feed portion; the second radiator has a third feed portion and a fourth feed portion; and the first radiator and the second radiator are arranged at the same installation surface, and the radiation surfaces of the first radiation fin and the second radiation fin are planes.

The invention relates to an implementation method of a high-gain omnidirectional biconical antenna array. The implementation method is mainly used for improving the omnidirectional degree of an omnidirectional antenna in a broadband range and acquiring a pitching wave beam with good in-band consistency at the same time. The high-gain omnidirectional biconical antenna array is composed of a plurality of cylindrical loading special-shaped sleeve biconical antenna units arrayed by pitching surfaces and an array feeder, wherein the top of a cone of each sleeve biconical antenna unit is provided with a cylindrical load so as to improve an in-band voltage standing wave ratio; each array unit is directly excited through a coaxial line, an inner conductor of the coaxial line is connected with an upper half cone of the unit, and an outer conductor is connected with a lower half cone; one upper biconical antenna feed coaxial line passes through the inner conductor of one lower unit feed coaxial line in sequence to form a nested coaxial line, and feed structures do not interfere with each other; and the nested coaxial line is converted into an independent feed connector through a coaxial ridge waveguide conversion pair below the coaxial line. The method is suitable for design and implementation of the high-gain omnidirectional biconical antenna array.

A satellite-navigation anti-interference microstrip array antenna provided in the invention adopts triangular Y-shaped slot microstrip array elements. By using the antenna, miniaturization of the antenna array can be realized, cross coupling among array elements is effectively overcome and an anti-interference capability is increased. The antenna comprises N microstrip antenna array elements, a medium substrate and a metal reflection base plate. The microstrip antenna array elements are arranged on an upper surface of the medium substrate according to a certain interval. The metal reflection base plate is arranged on a lower surface of the medium substrate. Each microstrip antenna array element comprises a triangle metal radiant panel. The triangle metal radiant panel is provided with a Y-shaped slot. The Y-shaped slot comprises three bar-type slotting. Initiating terminals of the three bar-type slotting are intersected and converged and tail terminals are pointed to three edges of a triangle respectively. The triangular Y-shaped slot microstrip array elements are used for controlling flowing of a surface current and radiating a circular polarized wave. An edge of each bar-type slotting of the Y-shaped slot is provided with a coaxial feed point used for feeding in an electromagnetic wave signal.