31results about How to "Improved cross polarization ratio" patented technology

The invention discloses an antenna feed structure and a base station antenna. The base station antenna comprises a plane reflector and at least one antenna feed structure installed thereat. The antenna feed structure comprises a radiator, an antenna feed balun and an antenna feed board. The antenna feed balun comprises one end connected to the radiator, and another end passing through the antenna feed board to connect the ground. In operation, an excitation signal is transferred from the antenna feed board via the antenna feed balun to the radiator. The present invention can be utilized to enhance the performance of antenna radiation, and improve an antenna cross polarization ratio, facilitating an increase in an antenna gain, increasing the base station coverage and optimizing the electrical characteristics of an antenna.

The invention relates to an ultra-wide-band microstrip patch antenna and a multi-frequency antenna array. The microstrip patch antenna comprises a metal reflective plate and a radiation patch apparatus above the metal reflective plate; a metal patch and two gaps with opening slots in a first straight line direction are arranged on a microstrip patch layer; the opening slots of the gaps in the first straight line direction are opposite in directions; a feed network layer comprises a first feed input port, a first power division node, a first feeder line, a second feeder line and a third feeder line; one end of the first feeder line is connected with the first feed input port while the other end is connected with the input end of the first power division node; and the fixed ends of the second feeder line and the third feeder line are connected with the output end of the first power division node separately while the free ends extend towards the same side of the two gaps in the first straight line direction separately to cross over the two gaps in the first straight line direction respectively. By virtue of the technical scheme provided by the invention, the problems of antenna feed chromatic dispersion, poor directional diagram cross polarization and cross coupling of different frequencies in a multi-frequency antenna can be solved.

The invention discloses a dual-polarized ultra-wideband base station antenna radiation unit comprising an unbalanced-balanced feed connecting seat, a radiator, and a feed conductor. The radiator is formed by two pairs of orthogonal oscillator arms. The oscillator arms are arranged in the same plane and are installed on one end of the unbalanced-balanced feed connecting seat. The feed conductor is equipped with a dielectric clamp, is installed inside the unbalanced-balanced feed connecting seat through the dielectric clamp, and is separated from the unbalanced-balanced feed connecting seat. The dual-polarized ultra-wideband base station antenna radiation unit has beneficial effects of high installation firmness, good batch production consistency, good cross polarization ratio, high port isolation, and a broadband characteristic between 1680 and 3000MHz, achieves a wider bandwidth while satisfying the requirement of a conventional broadband base station antenna, provides a condition for later expansion, and has wide application prospect.

The invention discloses an indoor multiple input multiple output (MIMO) antenna which comprises an antenna cover, a radiator and a reflecting plate. The radiator is arranged on the reflecting plate, the antenna cover is arranged above the radiator and surrounds the radiator, the radiator comprises a metal patch and two half-wavelength dipoles, the half-wavelength dipoles are respectively printed on two printed circuit boards (PCBs) which are placed in mutual orthogonal cross mode, and the metal patch and the PCBs placed in orthogonal cross mode are evenly distributed on a longitudinal central line of the reflecting plate. The MIMO antenna can replace a wall-mounted antenna in an existing network directly, can support a double-channel device of time division-synchronization code division multiple access (TD-SCDMA), wireless local area network (WLAN) and long term evolution (LTE) frequency band, saves a large amount of resources for smooth transition of an indoor coverage system, and simultaneously provides more selection schemes for a future network integration scheme. The MIMO antenna is simple in structure, easy to assemble and debug, low in cost and favorable for mass production.

The invention provide an antenna which comprises a reflecting plate having a front side, a pair of side plates, low frequency radiation units, high frequency radiation units and a reflection cavity of at least one layer which surrounds the outer sides of the high frequency radiation units, wherein the side plates are respectively arranged at two sides, positioned in a width direction, of the reflecting plate and extend upward from the front side of the reflecting plate; the low frequency radiation units and the high frequency radiation units are arranged on the front side of the reflecting plate, one high frequency radiation unit is arranged between two adjacent low frequency radiation units, and a two layer reflection cavity is arranged at the outer side of at least one high frequency radiation unit. Compared with technologies of the prior art, the antenna of the invention is advantageous in that a double layer or one layer reflection cavity surrounds the high frequency radiation units, high horizontal plane wave beam convergence is realized, and high performance of the high frequency radiation units can be achieved.

The invention discloses a radiation unit of an antenna, and the radiation unit comprises an oscillator radiation circuit board which is provided with oscillator radiation arms arranged in pairs in a printed manner, wherein the width of each oscillator radiation arm is less than a half of the wavelength; an oscillator balun circuit board which is used for supporting the oscillator radiation circuitboard, wherein an oscillator balun is printed on the oscillator balun circuit board, the height of the oscillator balun is less than one fifth of the wavelength, and the oscillator balun is providedwith at least one first slot. Based on the invention, in particular for a 5G-MIMO large-array base station and a micro base station, the radiation unit can improve the overall performance of antennassuch as bandwidth, isolation, gain, cross polarization and the like as a whole, and meanwhile, the size of the antenna cannot be reduced with relatively small performance loss.

The invention discloses a dual-polarized broadband base station antenna radiating unit. The unit includes an oscillator BALUN, four oscillator arms and two cables; the oscillator balun is of a symmetric and hollow structure, the oscillator arms and the oscillator balun are integrally formed, the four oscillator arms forming a radiating body are symmetrical by using the oscillator balun as the center and are orthogonally combined to form a plus or minus 45-degree polarized distribution, the four oscillator arms are located on the same plane, and the distance between the plane where the four oscillator arms are located and metal reflection plates is the one-fourth wave length; the oscillator arms are rectangular and are internally provided with hollow polygons, and a rectangular hollow gap is formed between every two adjacent oscillator arms. The dual-polarized broadband base station antenna radiating unit is high in installation stability, good in batch production consistency, good in cross polarization ratio and high in port isolation degree, has 698-960MHz broadband characteristics, meets the requirement of an existing broadband base station antenna, has higher bandwidth, provides conditions for future expansion, and has broad application prospects.

The invention discloses a base station antenna oscillator and an antenna. According to the invention, one end of a feed balun passes through a radiation substrate and is connected to a radiator, the radiator is provided with first hollowed-out grooves and a second hollowed-out groove, the first hollowed-out grooves are symmetrically arranged along the diagonal line of the radiator, the second hollow-out groove comprises extending parts which are perpendicular to each other and are communicated with each other, and a parallel part perpendicular to and communicated with the end portions of the extending parts, the parallel part is parallel to the side edge of the radiator, a part between the extending part and the first hollow-out groove is used as a first radiator, the distance between theextending part and the first hollow-out groove is the width of the first radiator, the part between the parallel part and the side edge of the radiator is used as a second radiator, the distance between the parallel part and the side edge of the radiator is the width of the second radiator, and the width of the first radiator is larger than the width of the second radiator. The base station antenna oscillator and the antenna are excellent in performance and small in size.

The invention discloses an improved dual-polarization base station antenna and a method for improving cross-polarization ratio. The improved dual-polarization base station antenna comprises a metal floor, a radiating body and a feed part, and also comprises four metal strips, wherein the four metal strips form a square on the identical horizontal plane; the side length of the square is one wavelength of a center frequency; the vertical distance from the central point of the square to the metal floor is quarter wavelength of the center frequency of the antenna; the central point of the radiating body and the central point of the square are located on the identical vertical straight line. According to the method disclosed by the invention, the cross-polarization ratio of the dual-polarization base station antenna of plus or minus 45 degrees can be obviously improved.

The invention discloses a high gain T-shaped probe feed millimeter wave patch antenna. The high gain T-shaped probe feed millimeter wave patch antenna comprises a first medium substrate, wherein the first medium substrate is provided with a T-shaped probe, a first radiation patch, a second radiation patch, a first coplanar waveguide transmission wire and a second coplanar waveguide transmission wire, the T-shaped probe comprises a horizontal patch and a vertical metal through hole, the horizontal patch, the first radiation patch and the second radiation patch are arranged on a front surface of the first medium substrate, distances between the horizontal patch and the first radiation patch and the second radiation patch are identical, the first coplanar waveguide transmission wire and the second coplanar waveguide transmission wire are arranged on a back surface of the first medium substrate, and the vertical metal through hole is arranged at a center of the horizontal patch and sequentially penetrates through the horizontal patch, the first medium substrate and the first coplanar waveguide transmission wire. The high gain T-shaped probe feed millimeter wave patch antenna is advantaged in that an excellent radiation directional diagram is realized, a stable and relatively high gain is realized in the whole work frequency band, and simple design, small volume, low cost and good characteristics are realized.

The invention relates to the field of mobile communication base station antennas, and in particular relates to an umbrella-shaped ultra-wideband bipolarization base station antenna radiation unit mounted on a reflection plate for forming an antenna. The umbrella-shaped ultra-wideband bipolarization base station antenna radiation unit comprises a plurality of support elements fixed on the reflection plate, a plurality of radiation bodies and an electricity feed cable, wherein the plurality of radiation bodies are formed through extending from the first ends of the support elements; the electricity feed cable feeds electricity for the radiation bodies; the plurality of radiation bodies form two groups of half-wave vibrators in mutual orthogonality; the corresponding connection part of the electrical connection of the electricity feed cable and the radiation bodies is lower than the upper surfaces of the radiation bodies. The difference is that each radiation body consists of a horizontal radiation body and a bent radiation body; and the tail end extending outward of each horizontal radiation body is connected with the bent radiation body bending downward. The umbrella-shaped ultra-wideband bipolarization base station antenna radiation unit provided by the invention is high in impedance band width, high in insulation degree and high in crossed polarization ratio.

The invention discloses a low-profile magnetic dipole antenna capable of being used for a base station antenna, which comprises a reflection bottom plate, an L-shaped feeder line, a first metal patch and a second metal patch, and is characterized in that the reflection bottom plate is fixedly connected with the first metal patch and the second metal patch which are arranged in a bilateral symmetry manner; the L-shaped feed line comprises an end part feed piece, a horizontal feed piece and a vertical feed piece which are integrally connected in sequence, the end part feed piece is embedded and fixed in the first metal patch, the horizontal feed piece is parallel to the reflection bottom plate, the vertical feed piece is vertical to the reflection bottom plate, the end part of the vertical feed piece is integrally connected with a connecting column, the connecting column penetrates through the reflection bottom plate, and the connecting column is connected with the first metal patch. And the connecting piece is fixedly connected with the SMA connector below. An all-metal structure can be adopted, the structure is simple, the design process is clear, the design application difficulty can be reduced, and portability is high.

The invention discloses a miniaturized wideband radiating element suitable for TD-LTE antennas. The miniaturized wideband radiating element comprises radiating bodies which are printed on the front face and the back face of a PCB dielectric slab (16) respectively, a sinking column (8) for regulating the low-frequency standing wave ratio and the cross polarization ratio, a tin-plated metal base (9) and coaxial cables (10). The radiating bodies are composed of metal sheets of double-layer structures and feed pieces which are vertically separated. On the premise of guaranteeing the bandwidth of the antennas, the overall weight and size of the antennas can be greatly reduced, and a base station can be conveniently built and maintained in later periods. Compared with a current metal die-casting radiating element, the miniaturized wideband radiating element can be more easily welded and assembled, and is better in stability.

The invention discloses a dual polarization array antenna with high polarized isolation; the dual polarization array antenna comprises two radiation pasters, a [pi] type mutual coupling suppression structure arranged between the two radiation pasters, a parasitic coupled floor and a grounding capacitive loading ring; the grounding capacitive loading ring is vertically arranged on the parasitic coupled floor; the [pi] type mutual coupling suppression structure and the grounding capacitive loading ring are mutually vertical to each other. The antenna adds the [pi] type mutual coupling suppression structure between the array elements, thus effectively improving the antenna polarized isolation, and keeping other performance of the antenna to be well.

The invention discloses a differential broadband dual-polarization base station antenna for improving a cross polarization ratio. The antenna comprises a reflecting plate, a cross feed structure, four radiation units and four coaxial lines, wherein after the upper ends of the four coaxial lines penetrate through the reflecting plate, outer conductors at the upper ends of the four coaxial lines are connected with the four radiation units in a one-to-one correspondence mode, and an inner conductor at the upper end of each coaxial line penetrates through the corresponding radiation unit and then is connected with the cross feed structure; the lower ends of the four coaxial lines are connected with SMA (Styrene Maleic Anhydride) heads; the four coaxial lines form two pairs of differential feed ports, the four radiation units form two pairs of dipoles, and the two pairs of differential feed ports feed the two pairs of dipoles. The antenna has the characteristics of broad band, high cross polarization ratio and high isolation, realizes stable radiation patterns, stable half-power beam width and stable gains, and has simple structure and good performance; and the service life of the antenna can be prolonged by adopting a cast structure.

The invention belongs to the technical field of communications and provides a base station antenna element. The base station antenna element comprises a reflection plate, die-casting elements, coupling radiation sheets, insulation pads and feed sheets, wherein the die-casting elements are installed on the reflection plate, the number of the coupling radiation sheets is even, and the coupling radiation sheets are closely fixed to the die-casting elements. The insulation pads are arranged between the coupling radiation sheets and the die-casting elements, so that the coupling radiation sheets and the die-casting elements keep insulated. The feed sheets are located in through holes of the die-casting elements, one end of each feed sheet is welded to the corresponding die-casting element, and the other end of each feed sheet is welded to a conductor in a cable. In this way, the base station antenna element has a good cross polar ratio and good intermodulation characteristics and is simple in structure and easy to produce.

The invention provide an antenna which comprises a reflecting plate having a front side, a pair of side plates, low frequency radiation units, high frequency radiation units and a reflection cavity of at least one layer which surrounds the outer sides of the high frequency radiation units, wherein the side plates are respectively arranged at two sides, positioned in a width direction, of the reflecting plate and extend upward from the front side of the reflecting plate; the low frequency radiation units and the high frequency radiation units are arranged on the front side of the reflecting plate, one high frequency radiation unit is arranged between two adjacent low frequency radiation units, and a two layer reflection cavity is arranged at the outer side of at least one high frequency radiation unit. Compared with technologies of the prior art, the antenna of the invention is advantageous in that a double layer or one layer reflection cavity surrounds the high frequency radiation units, high horizontal plane wave beam convergence is realized, and high performance of the high frequency radiation units can be achieved.

The invention discloses a bipolar vibrator, which comprises a radiation unit and a vibrator base, wherein the vibrator base is connected with the radiation unit; the radiation unit comprises a carrier plate and two band lines; the two band lines are covered on upper and lower surfaces of the carrier plate respectively; the two band lines are shaped identically and perpendicular to each other; each of the band lines is provided with two base bands parallel to each other and two radiation bands connected to both ends of each of the two base bands symmetrically; the two base bands are connected with the vibrator base respectively and form a closed loop with the two radiation bands; the two base bands are grounded respectively; and one of the two base bands is used for feeding in a signal. The two base bands of the each band line of the bipolar vibrator form the closed loop with the two radiation bands connected to the both ends of each of the two base bands symmetrically, thereby furtherforming a polar direction; and one of the base bands is used for feeding the signal of a feed cable in the two radiation bands, thereby improving the isolation, the front-to-back ratio and the cross polarization ratio of the vibrator.

The invention discloses a high gain T-shaped probe feed millimeter wave patch antenna. The high gain T-shaped probe feed millimeter wave patch antenna comprises a first medium substrate, wherein the first medium substrate is provided with a T-shaped probe, a first radiation patch, a second radiation patch, a first coplanar waveguide transmission wire and a second coplanar waveguide transmission wire, the T-shaped probe comprises a horizontal patch and a vertical metal through hole, the horizontal patch, the first radiation patch and the second radiation patch are arranged on a front surface of the first medium substrate, distances between the horizontal patch and the first radiation patch and the second radiation patch are identical, the first coplanar waveguide transmission wire and the second coplanar waveguide transmission wire are arranged on a back surface of the first medium substrate, and the vertical metal through hole is arranged at a center of the horizontal patch and sequentially penetrates through the horizontal patch, the first medium substrate and the first coplanar waveguide transmission wire. The high gain T-shaped probe feed millimeter wave patch antenna is advantaged in that an excellent radiation directional diagram is realized, a stable and relatively high gain is realized in the whole work frequency band, and simple design, small volume, low cost and good characteristics are realized.

The invention relates to a dipole antenna with an adjustable feeding frequency and a method for adjusting an index of the antenna. The dipole antenna comprises a feeding end coaxial line, a coupling end coaxial line and oscillator arms; an inner conductors of the feeding end coaxial line and the coupling end coaxial line are connected through a wire above the oscillator arms; upper parts of outer conductors of the feeding end coaxial line and the coupling end coaxial line are respectively connected with the oscillator arms at two sides; lower ends of the outer conductors are respectively connected to the ground; and the coupling end coaxial line extends to below a ground plane. The dipole antenna is simple in structure and is realized by using the coaxial lines to feed, and the height of the antenna is adjustable. A method for adjusting the index of the dipole antenna fed by a dipole adjusts the length of the coupling end coaxial line and adjusts a center frequency of antenna resonance, is very simple and convenient to operate, and realizes a multi-frequency multiplexing function of one antenna. A front-to-rear ratio of the antenna can be adjusted through adjustment of the length of the coupling end coaxial line and the height of the antenna; and the method has very high practical value in optimization of the front-to-rear ratio of the antenna and optimization of a cross polarization ratio of the antenna in a dual polarized antenna.