CN108879115B - Base station radiating element integrated with filter and antenna - Google Patents
Base station radiating element integrated with filter and antenna Download PDFInfo
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- CN108879115B CN108879115B CN201810636506.XA CN201810636506A CN108879115B CN 108879115 B CN108879115 B CN 108879115B CN 201810636506 A CN201810636506 A CN 201810636506A CN 108879115 B CN108879115 B CN 108879115B
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- 230000005855 radiation Effects 0.000 claims abstract description 74
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 238000005192 partition Methods 0.000 claims description 9
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- 238000012545 processing Methods 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000003993 interaction Effects 0.000 abstract description 5
- 238000002955 isolation Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000009713 electroplating Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
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- 238000003466 welding Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
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- 238000004891 communication Methods 0.000 description 3
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- 230000004308 accommodation Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 210000001624 hip Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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- Variable-Direction Aerials And Aerial Arrays (AREA)
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Abstract
The invention discloses a base station radiating unit and an antenna of an integrated filter, which comprise a supporting piece and a feed structure, wherein a plurality of radiating pieces are arranged around the supporting piece, a separation groove is arranged on the supporting piece between two adjacent radiating pieces, the plurality of separation grooves are combined to form a containing groove, the feed structure is provided with a filter component, and the feed structure and the filter component are arranged in the containing groove; the antenna comprises the radiating element. The base station radiating unit and the antenna of the integrated filter have good out-of-band rejection capability, so that the interaction between the low-frequency radiating array and the high-frequency radiating array is reduced; by integrating the filter component and the feed piece, the integral structure and the processing technology of the radiating unit are greatly simplified on the basis that the radiation characteristic of the radiating unit is not affected.
Description
Technical Field
The present invention relates to a radiating element, and more particularly, to a base station radiating element with an integrated filter and an antenna including the radiating element.
Background
Today, the fourth generation mobile communication system is commercially available on a large scale, the telecom 800MHz LTE network is formed, the mobile 2.6GHz TDD4G network is continuously expanded, and the original 900MHz and 1800MHz 2G and 3G networks are simultaneously operated. Under the condition, ground resources available for base station site selection are increasingly tense, the problem of crosstalk between networks is more serious, and electronic equipment such as mobile phones and the like are switched back and forth among various networks, so that unstable data transmission, network blocking and even network disconnection occur. Therefore, the main body providing the communication service is under increasing pressure, and optimization of the wireless network has become urgent.
The adoption of the small-caliber multi-frequency ultra-wideband antenna can reduce the station building cost of the base station, improve the utilization efficiency of the radiation port surface of the antenna, however, the high frequency and the low frequency of the antenna are easy to interfere with each other, the bottom noise level of the system is affected, and the running stability of the whole network is seriously reduced. Therefore, how to reduce the mutual interference between the high frequency and the low frequency of the multi-frequency antenna has become an important research direction in the field of antenna design.
At present, in order to suppress the interference problem between the high frequency and the low frequency of the multi-frequency antenna, a method is generally adopted in which a filter is arranged at the main feeder end of the high frequency and the low frequency antenna array, and the filter is mostly a PCB filter or a cavity filter. The volume and the weight of the cavity filter are too large, and the debugging is difficult; the PCB filter has small volume, larger loss and poor batch consistency.
The Chinese patent with the application number 201410216961.6 and the application date 2014, 5 and 20, namely the dual-frequency filter antenna with the anti-interference characteristic, adopts the technical scheme that a radiation unit is used for configuring a filter, and the radiation unit and the filter are independently designed and printed on the same dielectric substrate. The antenna manufactured by the method has a complex structure, the number of welding spots is greatly increased in the whole processing process, and the hidden danger of third-order intermodulation exists.
In german patent document with publication number DE102015007503A1 and publication date 2016, 12 and 15, a design idea of integrating a filter with a radiation unit is proposed, and the filter is integrated on a feed piece and fixedly connected with a support piece so as to realize signal transmission. Because the electromagnetic wave transmission main mode of the structure is a quasi-TEM mode, the filter can excite the higher order mode to influence the radiation characteristic of the low frequency radiation unit, and therefore, the integrated filter and the outer side of the feed sheet structure are provided with a semi-annular wrapping wall (shown in fig. 8) so as to wrap the integrated structure in and shield the interference of the higher order mode.
However, although the scheme can achieve a better shielding effect of the high-order mode and reduce the interference of the high-order mode on the low-frequency radiating unit, the integrated radiating unit has a complex overall structure, so that the processing technology is complex, the processing difficulty is high, the defective rate of the finished product is higher, and the processing cost is greatly increased.
Disclosure of Invention
The invention provides a base station radiating element and an antenna of an integrated filter, which not only have excellent signal transmission effect and filtering effect, but also have high integration level, simple structure, compact size and easy processing, and the specific technical scheme is as follows:
The utility model provides an integrated filter's basic station radiating element, includes support piece and feed structure, is provided with a plurality of radiating elements around support piece, is equipped with the separating groove on being located the support piece between two adjacent radiating elements, and a plurality of separating groove combinations form accommodation groove, is provided with filter component on the feed structure, and feed structure and filter component set up in accommodation groove.
Further, the support member includes a plurality of support portions that are rotationally symmetrically disposed.
Further, the supporting part comprises two side plates which are vertically arranged, the two opposite side plates of the two adjacent supporting parts are parallel to each other, and a separation groove is formed between the two parallel side plates.
Further, the number of the supporting parts is the same as that of the radiating pieces, each supporting part is correspondingly provided with one radiating piece, the plurality of radiating pieces are positioned in the same plane, and the plurality of radiating pieces are rotationally symmetrical around the central axis of the supporting piece.
Further, two side plates on the same supporting part are mutually perpendicular.
Further, two adjacent separating grooves are perpendicular to each other, two opposite separating grooves are located on the same straight line, and four separating grooves formed by the four supporting parts form a cross-shaped accommodating groove.
Further, the upper end opening part of the two side plates of the supporting part is provided with a top plate, and the top plate is provided with a connecting part, and the radiating piece is connected with the connecting part so as to be fixed on the supporting part.
Further, the device comprises a bottom plate, wherein the bottom ends of the supporting parts are fixedly arranged on the bottom plate, so that the supporting parts are connected into a whole.
Further, the feed structure includes at least one feed tab, and the filter assembly includes at least one open circuit stub located in the receiving recess, fixedly connected to the feed tab.
Further, the number of open circuit branches is three, wherein two open circuit branches set up in the outside of feed piece stiff end, and the kink of two open circuit branches is buckled relatively, and the third open circuit branch sets up in the inboard of feed piece stiff end, is located between two open circuit branches in the outside.
Further, the length of the open stub is a quarter wavelength that suppresses high frequencies.
Further, the feed structure includes two feed pieces, and two feed pieces are alternately stacked perpendicularly, form the cross structure, and the cross feed piece sets up in holding the recess.
Further, the filter component is a step impedance low pass filter.
Further, the radiating element is a cylindrical hollow cylinder structure.
An antenna comprising a base station radiating element of an integrated filter as described above.
Further, including radiating subarray and reflecting plate, radiating subarray sets up on the reflecting plate, and radiating subarray includes low frequency radiating element and high frequency radiating element, and low frequency radiating element includes four radiating elements, and two adjacent radiating elements mutually perpendicular, the straight line that two opposite radiating elements are located or be parallel to the side of reflecting plate, or perpendicular to the side of reflecting plate set up the high frequency radiating element between two adjacent radiating elements.
Further, the radiation device comprises a plurality of radiation subarrays which are sequentially arranged on the reflecting plate, two high-frequency radiation units are arranged at the middle positions of two adjacent radiation subarrays, and the two high-frequency radiation units are respectively arranged at two sides of the reflecting plate and aligned with the high-frequency radiation units in the radiation subarrays.
Further, the longitudinal spacing between two adjacent high-frequency radiating elements is 100mm-120mm, and the spacing between two adjacent low-frequency radiating elements is 320mm-340mm.
The base station radiating unit of the integrated filter has good out-of-band rejection capability, and reduces the interaction between the low-frequency radiating array and the high-frequency radiating array. By integrating the filter component and the feed piece, the integral structure and the processing technology of the radiating unit are greatly simplified on the basis that the radiation characteristic of the radiating unit is not affected. The feed piece of the integrated filter component greatly reduces the welding connection mode, and is favorable for the consistency of production and the stability of third-order intermodulation.
The antenna of the invention is not limited to the arrangement form of one low-frequency radiating element and two high-frequency radiating element arrays, can be expanded into the array form of a plurality of low-frequency radiating elements and a plurality of high-frequency radiating elements so as to realize the communication of more frequency bands, and has good electrical index, very convenient installation and low processing and installation cost.
Drawings
Fig. 1 is a perspective view of a base station radiating element of the integrated filter of the present invention.
Fig. 2 is a cross-sectional view of a base station radiating element of the integrated filter of the present invention.
Fig. 3 is a schematic diagram of a structure in which a base station radiating element of an integrated filter is applied to an antenna.
Fig. 4 is a schematic diagram of a structure in which a base station radiating element of an integrated filter is applied to an antenna.
Fig. 5 is a top view of the antenna of the present invention.
Fig. 6 is a perspective view of an antenna of the present invention.
Fig. 7 is a pattern of the antenna of the present invention in HFSS simulation.
Fig. 8 is a schematic structural diagram of a radiation unit in the prior art.
Fig. 9 is a schematic structural diagram of a second embodiment of a base station radiating element of the integrated filter of the present invention.
Detailed Description
For a better understanding of the objects, functions and specific designs of the present invention, the base station radiating element and antenna of the integrated filter of the present invention are described in further detail below with reference to the accompanying drawings.
The base station radiating unit of the integrated filter comprises a supporting piece, an integrated component and a radiating component, wherein the radiating component and the integrated component are arranged on the supporting piece, and the supporting piece is used for supporting and fixing the radiating component and the integrated component.
The integrated component comprises a feed sheet and a filtering component, and the filtering component is integrated on the feed sheet so as to reduce mutual interference between high frequency and low frequency. The integrated component is fixedly arranged on the supporting piece.
The radiation component comprises a plurality of radiation pieces with the same size and shape, the plurality of radiation pieces are fixedly arranged around the support piece, the radiation pieces are rotationally symmetrical around the center point of the support piece, and the distances between the two radiation pieces positioned at adjacent positions are equal.
A radiation piece isolation groove is arranged between two radiation pieces positioned at adjacent positions, and the radiation piece isolation groove can separate the two radiation pieces positioned at the adjacent positions so as to ensure that the radiation unit normally transmits signals. The integrated component is arranged in the radiating element isolation groove.
Example 1
The radiation unit of the base station and the antenna of the integrated filter according to the present invention will be described in detail with reference to the accompanying drawings by taking a radiation unit comprising four radiation elements as an example.
As shown in fig. 1 and 2, the base station radiating element of the integrated filter of the present invention includes a support member 1, and the support member 1 includes four support portions 11 having the same size and shape. The supporting part 11 comprises two rectangular side plates 12 which are vertically arranged and have the same size and shape, and one long side of each side plate 12 is fixedly connected, so that the two side plates 12 are mutually perpendicular to form a right-angle side.
A top plate 13 is horizontally arranged at the opening formed at the upper ends of the two side plates 12, the top plate 13 is an isosceles right triangle, and the waist length is equal to the length of the short side of the side plate 12. The two waists of the top plate 13 are fixedly connected with the upper edges of the two side plates 12, so that the upper openings of the two side plates 12 are closed.
As shown in fig. 1 and 2, the four support portions 11 are rotationally symmetrically arranged, and right-angle sides of the support portions 11 are opposite to each other. Two support parts 11 at adjacent positions, two side plates 12 close to each other are parallel to each other, so that a separation groove 14 is formed between the two side plates 12; the two side plates 12 which are far away are positioned on the same horizontal plane.
The bottom ends of the four supporting parts 11 are also provided with bottom plates 15, and the bottom plates 15 are fixedly connected with the bottom edges of the supporting parts 11, so that the four supporting parts 11 are fixedly connected into a whole to form the supporting piece 1. Since the partition grooves 14 are formed between the adjacent two supporting parts 11, and the four formed partition grooves 14 are equal in size and shape, the four supporting parts 11 are combined together, so that the middle part of the supporting member 1 can form the cross-shaped accommodating groove 2.
It should be noted that, the support member 1 may be manufactured by a mold integral molding process, or may be assembled by a multi-plate welding process, which is not limited in the present application.
As shown in fig. 2, the feeding sheet 3 is fixedly disposed in the accommodating groove 2, and the feeding sheet 3 is a bent elongated sheet structure, including a fixed end 31 and an open end 32, and both the fixed end 31 and the open end 32 are perpendicular to the bottom plate 15. Wherein, the fixed end 31 is fixedly connected with the bottom plate 15 through the fixed seat 33; the open end 32 is in an open state and is not in contact with the support 1; the connecting portion 35 between the fixed end 31 and the upper end of the open end 32 is disposed horizontally.
The clamping groove is formed in the middle of the connecting part 35, the connecting parts 35 of the two feeding sheets 3 are vertically and alternately stacked, and are mutually clamped through the clamping groove to form a cross-shaped structure which is matched with the shape of the cross-shaped accommodating groove 2. Two feeding tabs 3 stacked in a crossing manner are embedded in the center of the accommodating groove 2, and each feeding tab 3 is parallel to the adjacent side plate 12 and does not exceed the coverage range of the side plate 12.
The fixed end 31 is provided with an open circuit branch 34, the open circuit branch 34 is of an elongated strip structure, one end of the open circuit branch 34 is fixedly connected with the body of the feed piece 3, and the other end of the open circuit branch extends to the outside far away from the body of the feed piece 3. As shown in fig. 2, in order to make the open-circuit branch 34 completely located inside the partition groove 14 and not extend to the outside of the adjacent two side plates 12, the end of the open-circuit branch 34 may be bent in the vertical direction so that the bent portion is parallel to the fixed end 31.
The open-circuit branch 34 may be provided in one or more, and the one or more open-circuit branch 34 is integrally formed with the feeding tab 3 and is located on the same plane as the feeding tab 3. The open branch 34 may be disposed at the inner side, the outer side, or both sides of the fixed end 31, and the end of the open branch 34 may be bent upward or downward in a vertical direction, which is not limited in the present application. Each open stub 34 has a length of about one quarter wavelength suppressing high frequencies.
Preferably, as shown in fig. 2, the open-circuit stubs 34 are provided in three, wherein two open-circuit stubs 34 are provided outside the fixed end 31, and the bent portions of the two open-circuit stubs 34 are bent relatively; the other open branch 34 is disposed inside the fixed end 31 and between the two open branches 34 on the outside. The three open stubs 34 are all located in the separator groove 14 formed by the adjacent two side plates 12 and do not extend outside the adjacent two side plates 12.
The feeding tab 3 integrally provided with the open stub 34 is disposed in the accommodating recess 2, and the feeding tab 3 and the adjacent four support side plates 12 form a quasi-strip line structure. The quasi-stripline structure can produce shielding effect to excited higher order modes.
The open branch 34 can act as a filter, and by integrating the open branch 34 on the feed piece, the structure and the processing technology of the radiating unit can be simplified, the interaction between the low-frequency radiating array and the high-frequency radiating array can be reduced, and the interference between the high frequency and the low frequency of the multi-frequency antenna can be restrained. By bending the open-circuit branch 34, the feed sheet 3 and the open-circuit branch 34 can be positioned in the isolation groove 14, namely between two adjacent side plates 12, so that the feed sheet 3 and the open-circuit branch 34 are well shielded, and the influence of a high-order mode excited by the open-circuit branch 34 on the radiation characteristic of the low-frequency radiation unit in the electromagnetic wave transmission process is prevented.
In addition, the open stub 34 described above may be replaced with a step impedance low pass filter. The high and low characteristic impedance line segments are alternately arranged and integrated on the inner side and the outer side of the feed piece, so that the high and low characteristic impedance line segments and the feed piece are arranged in a central symmetry manner, and the interaction between the low-frequency radiation array and the high-frequency radiation array is reduced. Since the step impedance low-pass filter is also arranged in the isolation groove 14 of the support 1, the influence of the high-order mode generated by the filter on the radiation characteristic of the low-frequency radiation unit can be reduced under the shielding effect of the side plate 12.
As shown in fig. 2, the top plate 13 of the support 11 is provided with a protrusion 16, and the protrusion 16 is located at a position intermediate the bottom side of the triangular top plate 13. The projection 16 is connected with a radiation arm 4, and the radiation arm 4 is a cylindrical hollow cylinder, is horizontally arranged and is vertical to the bottom edge of the top plate 13. The protruding part 16 is fixedly sleeved with a round plug made of insulating materials, the outer diameter size of the round plug is matched with the inner diameter size of the radiating arm 4, and the radiating arm 4 is sleeved on the round plug to be fixedly connected with the protruding part 16.
Four radiation arms 4 are respectively connected to the four supporting parts 11, the four radiation arms 4 are positioned on the same plane, two radiation arms 4 at adjacent positions are mutually perpendicular, and two radiation arms 4 at opposite positions are positioned on the same straight line.
The two radiation arms 4 positioned at the opposite positions are in a group, the two groups of radiation arms 4 form two pairs of dipoles with orthogonal polarization, the two feeding sheets 3 arranged in the accommodating groove 2 are respectively in one-to-one correspondence with the two pairs of dipoles, and the feeding sheets 3 can feed the corresponding pair of dipoles.
When the feeding sheet 3 is excited, the radio frequency current passes through the open circuit branch 34, and the open circuit branch 34 can effectively inhibit out-of-band signals without affecting the radiation characteristics of the low frequency radiation unit. The radio frequency energy is coupled from the feeding sheet 3 to the support 1 and then coupled to the radiation arm 4 via the support 1 to form electromagnetic wave radiation.
Of course, the radiation arm 4 may have other shapes, for example: the application is not limited to a solid cylinder structure, a hollow rectangular cylinder structure, a hollowed plate structure and the like.
Besides, the radiation arm 4 and the support member 1 may be connected by a coupling method, for example, the support member 1 and the radiation arm 4 may be integrally formed, or a fixed mounting hole may be formed in the radiation arm 4 and directly mounted on the radiation arm 4.
Fig. 8 shows a conventional radiation unit integrated with a filter (i.e. one of the embodiments of german patent publication DE102015007503A1 in the background art), which comprises four hollowed rectangular radiation arms 4a, and functions to radiate the energy at the feeding pad outwards in the form of electromagnetic waves, which corresponds to the radiation arms 4 in the present invention. Four semi-cylindrical shielding grooves 14b are vertically provided on the support member 1a, and the four shielding grooves 14b together constitute a cross-shaped shielding member for shielding the feed tab and the filter mounted therein, the function of which corresponds to the function of the accommodating recess 2 in the present invention.
In fig. 8, a partition 14a is formed between two adjacent radiation arms 4a, and the function of this structure corresponds to the function of the partition 14 of the present invention. It should be noted that, in the design process of the antenna, the slot structure arranged between two adjacent radiating arms is a conventional necessary design structure, and the length, width and other dimensions of the slot structure have corresponding calculation methods. That is, a partition 14 (or 14 a) must be provided between two adjacent radiating arms 4 (or 4 a) to ensure that the radiating unit normally completes electromagnetic wave radiation.
The base station radiating element of the integrated filter of the present invention has the following advantages in combination with the radiating element structure of the prior design described above and the radiating element structure of the present invention:
1. The structure of the radiating element is simplified.
The isolation groove 14 (and the accommodating groove 2 formed by the four isolation grooves 14) in the invention combines the functions of the shielding groove 14b and the isolation groove 14a in the prior art, thereby not only meeting the design key points of the isolation groove structure which is necessary to be contained in the antenna design, but also forming a shielding space (i.e. the accommodating groove 2) which can shield the feed piece and the filter component by utilizing the isolation groove structure so as to shield the high-order mode excited by the filter component.
The design mode of the radiation unit simplifies and optimizes the structure on the basis of not affecting the good radiation characteristic of the radiation unit, so that the overall structure of the radiation unit is more compact and portable, and the overall structure of the antenna is optimized.
2. The processing of the radiation unit is simplified.
As shown in fig. 8, in the radiation unit of the prior art, the side wall of the shielding groove 14b is in a plate structure with a circular arc shape, and the circular arc structure is very easy to generate uneven electroplating and inconsistent plating thickness in the electroplating process, so that the overall electroplating effect of the part is affected, and the difficulty of the processing technology is increased.
The radiation unit of the present invention as shown in fig. 1 does not have a curved structure in the support 1, and each surface for constituting the accommodating recess 2 is a plane. Therefore, the support 1 has uniform plating surface and uniform plating thickness in the electroplating process, thereby improving the electroplating effect and simplifying the processing technology of the radiation unit.
The antenna of the present invention as shown in fig. 5 and 6 includes a low frequency radiating element 5, a high frequency radiating element 6, and a reflecting plate 7, the low frequency radiating element 5 and the high frequency radiating element 6 being fixedly disposed on the reflecting plate 7.
The reflection plate 7 has an elongated strip-like structure, and a plurality of high-frequency radiation units 6 are sequentially arranged at side positions on both sides of the reflection plate 7. The plurality of high-frequency radiating elements 6 located on the same side are located on the same straight line parallel to the side edge of the reflecting plate 7, and the intervals between the plurality of high-frequency radiating elements 6 are equal; the two high-frequency radiating elements 6 located on the opposite sides are located on the same straight line, which is perpendicular to the side edges of the reflecting plate 7.
The plurality of low-frequency radiating elements 5 are arranged in series along the center line of the reflecting plate 7. As shown in fig. 3 and 4, the support 1 of the low frequency radiating element 5 is fixedly disposed at the center of a square array of four high frequency radiating elements 6, and the four radiating arms 4 of the low frequency radiating element 5 are either parallel to the side edges of the reflecting plate 7 or perpendicular to the side edges of the reflecting plate 7. Each radiating arm 4 is located in the middle of two high-frequency radiating elements 6. Wherein the distance between the two ends of the radiation arms 4 perpendicular to the side edges of the reflecting plate 7, which are directed outwards, is equal to the width of the reflecting plate 7.
As shown in fig. 5 and 6, one low-frequency radiating element 5 and four high-frequency radiating elements 6 together form a radiating subarray, and in particular, two high-frequency radiating elements 61 are spaced between two adjacent radiating subarrays, and the two high-frequency radiating elements 61 are respectively disposed on both sides of the reflecting plate 7 and are positioned on the same line as the high-frequency radiating elements 6 in the radiating subarrays.
The arrangement mode of the antenna can reduce the radiation influence between the low-frequency radiation unit and the high-frequency radiation unit to the greatest extent, is beneficial to reducing the size of the whole antenna, and enables the structure of the antenna to be more compact.
The spacing between two high-frequency radiating elements 6 positioned on the same side is 100mm-120mm, and the spacing between two low-frequency radiating elements 5 positioned adjacently is 320mm-340mm. Preferably, the interval between two high-frequency radiating elements 6 located on the same side is 110mm, and the interval between two low-frequency radiating elements 5 located adjacently is 330mm.
As shown in fig. 7, the antenna of the present invention is subjected to simulation test in HFSS to obtain the horizontal plane pattern of the illustrated low-frequency radiation array, and the main polarization pattern is converged and symmetrical, no distortion is found, the axial cross polarization level value reaches more than-25 dB, and the ±60° polarization discrimination is more than 7dB, which indicates that the radiation unit of the present invention does not affect the horizontal plane pattern of the antenna of the present invention.
Example two
As shown in fig. 9, the support part of the base station radiating unit of the integrated filter of the present invention is a trapezoidal columnar structure, the trapezoidal columnar structure comprises two vertical side walls, two opposite side walls of two adjacent trapezoidal columnar structures are parallel to each other, a separation groove is formed between the two side walls, and the integrated component is arranged in the separation groove.
Example III
The base station radiating unit of the integrated filter comprises six supporting parts, wherein the six supporting parts are identical in size and shape, and are rotationally symmetrical around the central line of the supporting parts, and the distances between the two adjacent supporting parts are equal.
A partition groove is formed between two side plates opposite to the two adjacent supporting parts, six partition grooves formed by the six supporting parts jointly form a star-shaped accommodating groove, and the integrated assembly is arranged in the accommodating groove.
The base station radiating unit of the integrated filter has good out-of-band rejection capability, and reduces the interaction between the low-frequency radiating array and the high-frequency radiating array. By integrating the filter component and the feed piece, the integral structure and the processing technology of the radiating unit are greatly simplified on the basis that the radiation characteristic of the radiating unit is not affected. The feed piece of the integrated filter component greatly reduces the welding connection mode, and is favorable for the consistency of production and the stability of third-order intermodulation.
The antenna of the invention is not limited to the arrangement form of one low-frequency radiating element and two high-frequency radiating element arrays, can be expanded into the array form of a plurality of low-frequency radiating elements and a plurality of high-frequency radiating elements so as to realize the communication of more frequency bands, and has good electrical index, very convenient installation and low processing and installation cost.
The invention has been further described with reference to specific embodiments, but it should be understood that the detailed description is not to be construed as limiting the spirit and scope of the invention, but rather as providing those skilled in the art with the benefit of this disclosure with the benefit of their various modifications to the described embodiments.
Claims (14)
1. The base station radiating unit of the integrated filter is characterized by comprising a supporting piece and a feed structure, wherein a plurality of radiating pieces are arranged around the supporting piece, a separation groove is arranged on the supporting piece between two adjacent radiating pieces, the plurality of separation grooves are combined to form a containing groove, a filter component is arranged on the feed structure, and the feed structure and the filter component are arranged in the containing groove;
The support piece comprises a plurality of support parts which are arranged in a rotationally symmetrical manner;
The number of the supporting parts is the same as that of the radiating parts, each supporting part is correspondingly provided with one radiating part, the plurality of radiating parts are positioned in the same plane, and the plurality of radiating parts are rotationally symmetrical around the central axis of the supporting part; the radiation piece is coupled with the support piece;
The supporting part comprises two side plates and a top plate arranged at the upper ends of the two side plates, the top plate is provided with a protruding part, the protruding part is connected with the radiating piece, the radiating piece is of a hollow cylinder structure, a round plug made of insulating materials is fixedly sleeved on the protruding part, and the radiating piece is sleeved on the round plug.
2. The filter-integrated base station radiating element of claim 1, wherein two side plates opposite to each other of the adjacent two supporting portions are parallel to each other, and a partition groove is formed between the parallel side plates.
3. The filter-integrated base station radiating element of claim 2 wherein the two side plates on the same support are disposed perpendicular to each other.
4. A base station radiating element for an integrated filter according to claim 3, wherein two adjacent spaced apart grooves are perpendicular to each other, two spaced apart grooves are positioned in opposition to each other on the same straight line, and four spaced apart grooves formed by the four support portions together form a cross-shaped receiving recess.
5. The filter-integrated base station radiating element according to any one of claims 2 to 4, comprising a base plate, wherein the bottom ends of the plurality of support portions are fixedly provided on the base plate so that the plurality of support portions are connected as a unit.
6. The filter-integrated base station radiating element of claim 1, wherein the feed structure comprises at least one feed tab and the filter assembly comprises at least one open circuit stub positioned within the receiving recess and fixedly attached to the feed tab.
7. The filter-integrated base station radiating element of claim 6, wherein the number of open branches is three, two open branches are disposed outside the fixed end of the feed tab, the bent portions of two open branches are bent relatively, and a third open branch is disposed inside the fixed end of the feed tab between the two open branches on the outside.
8. The filter-integrated base station radiating element of claim 6 or 7 wherein the length of the open stub is one quarter wavelength suppressing high frequencies.
9. A base station radiating element for an integrated filter according to claim 6 or 7, characterized in that the feed structure comprises two feed tabs which are vertically cross-stacked to form a cross-shaped structure, the cross-shaped feed tabs being arranged in the receiving recess.
10. The filter-integrated base station radiating element of claim 1 wherein the filter component is a step-impedance low-pass filter.
11. An antenna, characterized by a base station radiating element comprising an integrated filter according to any of the preceding claims 1-10.
12. The antenna of claim 11, comprising a radiating sub-array and a reflecting plate, the radiating sub-array being disposed on the reflecting plate, the radiating sub-array comprising a low frequency radiating element and a high frequency radiating element, the low frequency radiating element comprising four radiating elements, adjacent radiating elements being perpendicular to each other, the two radiating elements being opposed to each other in a line or parallel to a side of the reflecting plate or perpendicular to a side of the reflecting plate, the high frequency radiating element being disposed between the adjacent radiating elements.
13. The antenna of claim 12, comprising a plurality of radiating sub-arrays sequentially arranged on the reflecting plate, wherein two high-frequency radiating elements are provided at intermediate positions of adjacent two radiating sub-arrays, the two high-frequency radiating elements being provided on both sides of the reflecting plate, respectively, in alignment with the high-frequency radiating elements in the radiating sub-arrays.
14. The antenna of claim 13, wherein a longitudinal spacing between adjacent two high frequency radiating elements is 100mm to 120mm and a spacing between adjacent two low frequency radiating elements is 320mm to 340mm.
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| CN201810636506.XA CN108879115B (en) | 2018-06-20 | 2018-06-20 | Base station radiating element integrated with filter and antenna |
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| CN201810636506.XA CN108879115B (en) | 2018-06-20 | 2018-06-20 | Base station radiating element integrated with filter and antenna |
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| CN210015956U (en) * | 2019-07-08 | 2020-02-04 | 深圳市大富科技股份有限公司 | Active antenna unit |
| CN110459867B (en) * | 2019-08-13 | 2024-07-16 | 昆山恩电开通信设备有限公司 | Ultra-wideband low-frequency radiation unit with high-frequency parasitic radiation inhibiting function |
| CN110890623A (en) * | 2019-11-14 | 2020-03-17 | 广东通宇通讯股份有限公司 | Antenna oscillator with filtering function, filtering radiation unit and antenna |
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| CN102832455A (en) * | 2012-08-31 | 2012-12-19 | 华为技术有限公司 | Antenna array and antenna device |
| CN103682631A (en) * | 2013-12-31 | 2014-03-26 | 张家港保税区国信通信有限公司 | Multi-standard multi-band dual-polarized antenna |
| JP6505876B2 (en) * | 2015-06-30 | 2019-04-24 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Radiation device |
| CN107565208A (en) * | 2016-06-30 | 2018-01-09 | 上海贝尔股份有限公司 | A kind of dual polarised radiation oscillator and a kind of multifrequency multi-port antenna device |
| CN107946736B (en) * | 2017-12-20 | 2024-07-23 | 华南理工大学 | Multi-frequency base station antenna and low-frequency radiation unit thereof |
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| WO2016198232A1 (en) * | 2015-06-11 | 2016-12-15 | Kathrein-Werke Kg | Dipole-shaped antenna arrangement |
| CN106876885A (en) * | 2015-12-10 | 2017-06-20 | 上海贝尔股份有限公司 | A kind of low-frequency vibrator and a kind of multifrequency multi-port antenna device |
| CN208226099U (en) * | 2018-06-20 | 2018-12-11 | 京信通信系统（中国）有限公司 | The base station radiating element and antenna of integrated filter |
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