CN105655702A - Low-profile small-scale dual-polarized base station antenna - Google Patents
Low-profile small-scale dual-polarized base station antenna Download PDFInfo
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- CN105655702A CN105655702A CN201610190311.8A CN201610190311A CN105655702A CN 105655702 A CN105655702 A CN 105655702A CN 201610190311 A CN201610190311 A CN 201610190311A CN 105655702 A CN105655702 A CN 105655702A
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- strong point
- balun
- support arm
- base station
- antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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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
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- 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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a low-profile small-scale dual-polarized base station antenna. The low-profile small-scale dual-polarized base station antenna comprises an antenna housing, a plurality of oscillator components, a power distribution plate, two inner side metal baffles and a reflection plate. The antenna housing covers the reflection plate, and the oscillator components, the power distribution plate and the inner side metal baffles are positioned inside the antenna housing. Two sides of the reflection plate are provided with vertical flanges, and the power distribution plate is positioned on the front or back surface of the reflection plate and fixedly connected with the reflection plate. Each oscillator component comprises a radiation plate and a supporting device, and each radiation plate is fixed to the power distribution plate through the corresponding supporting device. The two inner side metal baffles are symmetrical relative to the oscillator components and fixed to the reflection plate. The low-profile small-scale dual-polarized base station antenna has the advantages of ultra wideband, high gain, high efficiency, high cross polarization ratio, high front-to-back ratio, high isolation and the like.
Description
Technical field
The invention mainly relates to antenna technical field, particularly relate to a kind of low section small capacity double polarization antenna for base station.
Background technology
Antenna for base station is in mobile communication system, and the aerial electrically bridge of user terminal and base station, is the parts of most critical in whole antenna-feedback system, and the quality of antenna for base station directly affects communication quality.
According to application scenario, antenna for base station substantially can be divided into two classes:
One class is the large-scale macro base station antenna being erected on high buildings and large mansions, steel tower, is characterized in that unit number is relatively many, gain is of a relatively high, the accurate figuration of wave beam and to follow the tracks of user, power capacity relatively big, for covering on a large scale;
Another kind of is small-sized micro-antenna for base station, it is characterized in that antenna element number is less, gain is relatively low, the rough figuration of wave beam, power capacity are relatively small, mend blind for the fixed point beyond macro base station antenna coverage areas, the hot spot region of densely populated place covers, for instance market, airport, subway station and gymnasium etc.
Currently, due to wide coverage, siting of station difficulty, floor space greatly, frequency spectrum resource is limited simultaneously, therefore, it is difficult to dispose in densely populated place for macro base station antenna; Additionally, even with new techniques such as LTE, OFDM and MIMO, still make it difficult for the dense population in little scope high-peed connection and switching simultaneously, network rate is too low. Additionally, macro base station overburden depth is inadequate, particularly in cell edge, building corner, venue edge, there is covering blind spot, signal intensity substantially weakens, and signal to noise ratio declines greatly, causes Consumer's Experience to decline, even cannot access to mobile network. In order to solve these problems, the small base station antenna covered for solving focus blind spot occurs in that. Along with the development of communication technology and mobile Internet, the prospect of small base station antenna is more wide.
That existing antenna for base station is primarily present disadvantageously, way of realization and packaging technology are complicated, many employing die cast metal Harmonic Oscillators, it is necessary to complicated feeding network, ratio realizes feed if desired for 4 coaxial cables of use. Even with the broad-band antenna that PCB typography realizes, under the version of low section (antenna distance reflector height is less than 0.125 wavelength), being difficult under broadband (690-960MHz or 1710-2700MHz) condition, electricity function index meets the requirement of antenna for base station industry standard.
Summary of the invention
The low section small capacity double polarization antenna for base station of a kind of ultra broadband, high-gain, high efficiency, high cross polarization ratio, high front and back ratio and high-isolation that the purpose of the present invention is contemplated to solve the deficiency of prior art and provides, and simple and beautiful structure, it is prone to Project Realization, it is suitable for producing in enormous quantities, reducing production cost, electricity function index meets common macro base station antenna industry standard.
In order to reach foregoing invention purpose, solve the technical scheme that its technical problem adopts as follows:
A kind of low section small capacity double polarization antenna for base station, including an antenna house, some vibrator component, a power distribution plate, two pieces of inner metal baffle plates and a reflecting plate, wherein:
Described antenna house covers at above described reflecting plate, and described vibrator component, power distribution plate and inner metal baffle plate are positioned at inside described antenna house;
Described reflecting plate both sides are provided with vertical flange;
Described power distribution plate is positioned at front or the back side of described reflecting plate, and fixing with described reflecting plate is connected;
Each described vibrator component includes radiation fin and a support arrangement, and described radiation fin is fixed on described power distribution plate by described support arrangement;
Two pieces of described inner metal baffle plates are symmetrical arranged about described vibrator component, and are fixed on described reflecting plate.
Further, described radiation fin includes dielectric material plate, and the front of described dielectric material plate is provided with half-wave dipole antenna arm and the first metal tape, wherein:
The quantity of described half-wave dipole antenna arm is four, and each described half-wave dipole antenna arm includes a half-wave dipole antenna arm body and two protruding minor matters;
Four described half-wave dipole antenna arm bodies are respectively about described dielectric material plate centrosymmetry and in �� 45 �� of distributions, and leave the first narrow slit between adjacent two described half-wave dipole antenna arms, offer a cell body in the middle of each described half-wave dipole antenna arm body, described cell body along described dielectric material plate �� 45 �� of axis extend to the described half-wave dipole antenna arm body end away from described dielectric material plate center;
It is provided with narrow channel between two described protruding minor matters, described narrow channel is through with described cell body be connected and along described dielectric material plate �� 45 �� of axis arrange, two described protruding minor matters are connected as a single entity with described half-wave dipole antenna arm body end, and are mirrored into symmetrical about described narrow channel; The quantity of described first metal tape is four, each described first metal tape is positioned at the outside of adjacent two described half-wave dipole antenna arms, and leaving the second narrow slit near adjacent two described half-wave dipole antenna arm places, two described first metal tapes of Arbitrary Relative, with described first narrow slit for axle, are distributed axisymmetricly.
Preferably, described half-wave dipole antenna arm be shaped as square or circular arc is petal.
Preferably, described first metal tape is metal band or T-shaped metal tape.
Preferably, described protruding minor matters are right-angled trapezium or rectangle.
Further, the back side distribution of described dielectric material plate has four the second metal tapes, and four described second metal tapes are positioned at the edge of described dielectric material plate, and four described second metal tapes enclose, and adjacent two described second metal tape angles are 90 ��;
There is the first overlapping region in the half-wave dipole antenna arm in described second metal tape and described radiation fin front, described first overlapping region has eight;
There is the second overlapping region in first metal tape in described second metal tape and described radiation fin front, described second overlapping region has four.
Preferably, described second metal tape is metal band or becket.
Further, described support arrangement includes the first balun support arm and the second balun support arm, described first balun support arm and the second orthogonal assembling of balun support arm.
Further, the front of described first balun support arm includes the first microstrip line balun, the first radiating patch point, the first welding strong point, the second welding strong point and the 3rd welding strong point, wherein:
The centre of described first balun support arm has elongated slot, is used for and the second orthogonal assembling of balun support arm;
Described first microstrip line balun is direct-connected with described first radiating patch point;
The described first welding strong point, the second welding strong point and the 3rd welding strong point are made by metal copper layer;
The front of described first balun support arm and described power distribution plate welds the strong point and second by described first and weld the strong point and be welded to connect;
The front of described first balun support arm is welded the strong point with described radiation fin by the described 3rd and is welded to connect.
Further, the back side of described first balun support arm includes the first balun ground wire, the second radiating patch point, the 4th welding strong point and the 5th welding strong point, wherein:
Described first balun ground wire is direct-connected with described second radiating patch point;
The described 4th welding strong point is not connected with described first balun ground wire;
The described 4th welding strong point and the 5th welding strong point are made by metal copper layer;
The back side of described first balun support arm is welded the strong point with described power distribution plate by the described 5th and is welded to connect;
The back side of described first balun support arm is welded the strong point with described radiation fin by the described 4th and is welded to connect.
Further, the front of described second balun support arm includes the second microstrip line balun, the 3rd radiating patch point, the 6th welding strong point and the 7th welding strong point, wherein:
The centre of described second balun support arm has short groove, is used for and the first orthogonal assembling of balun support arm;
Described second microstrip line balun is direct-connected with described 3rd radiating patch point;
The described 6th welding strong point and the 7th welding strong point are made by metal copper layer;
The front of described second balun support arm is welded the strong point with described power distribution plate by the described 7th and is welded to connect;
The front of described second balun support arm is welded the strong point with described radiation fin by the described 6th and is welded to connect.
Further, the back side of described second balun support arm includes the second balun ground wire, the 4th radiating patch point, coupling minor matters, the 8th welding strong point and the 9th welding strong point, wherein:
Described 4th radiating patch point, coupling minor matters and the 8th welding strong point are direct-connected with described second balun ground wire respectively;
The described 8th welding strong point and the 9th welding strong point are made by metal copper layer;
The back side of described second balun support arm is welded the strong point with described power distribution plate by the described 8th and is welded to connect;
The back side of described second balun support arm is welded the strong point with described radiation fin by the described 9th and is welded to connect.
Preferably, 1/8th wavelength that height is Antenna Operation mid frequency of described first balun support arm and the second balun support arm.
Relative to prior art, the invention have the benefit that
1) PCB material that ordinary base station antenna is conventional is adopted to complete overall construction design, radiating surface size is suitable with the size of ordinary base station antenna, it is even lower that what only balun support arm was simple is reduced to mid frequency 1/8th wavelength, do not add any unnecessary accessory, such as auxiliary tuning sheet metal, metal derby etc.
2) present invention changes the theoretical cognitive of tradition quarter-wave aerial oscillator. Traditional antenna theory is thought, beam antenna is in order to realize good radiation, needing to meet the radiating surface distance quarter-wave pitch requirements of bottom reflecting plate, to realize the echo in-phase stacking at radiating surface, this theoretical of 180 degree of reflected phase being affected by normal metal conductors limits. If traditional antenna does not do any innovative design, simple is reduced to 1/8th height, all can cause impedance bandwidth and directional diagram bandwidth degradation in various degree, and cross polarization is poorer than especially. And thick dielectric substrate substrate of the Meta Materials technology taked in prior art, high-k etc., it is for breaking through 180 degree of reflected phase, it is achieved zero approximate reflected phase, thus reducing the height of antenna, realize low section, but actual effect is unsatisfactory.
3) present invention adopts a kind of brand-new design, from engineering practicability angle, when not increasing any cost, realize the low Section Design truly of traditional base station antenna, meet antenna for base station industry standard, for small base station antenna, naturally it is also possible to for the Miniaturization Design of macro base station antenna.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below the accompanying drawing used required during embodiment is described is briefly described. It is clear that the accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings. In accompanying drawing:
Fig. 1 is the overall structure schematic diagram of the low section small capacity double polarization antenna for base station of the present invention;
Fig. 2 is the structural representation of vibrator component in the low section small capacity double polarization antenna for base station of the present invention;
Fig. 3 is the overall structure side view of the low section small capacity double polarization antenna for base station of the present invention;
Fig. 4 is the distressed structure schematic diagram of reflecting plate in the low section small capacity double polarization antenna for base station of the present invention;
Fig. 5 is the structural representation of power distribution plate in the low section small capacity double polarization antenna for base station of the present invention;
Fig. 6 is the Facad structure schematic diagram of radiation fin in the low section small capacity double polarization antenna for base station of the present invention;
Fig. 7 is the structural representation of the petal half-wave dipole antenna arm of circular arc on radiation fin in the present invention low section small capacity double polarization antenna for base station;
Fig. 8 is the structural representation of T-shaped metal tape on radiation fin in the present invention low section small capacity double polarization antenna for base station;
Fig. 9 is the position view of the radiation fin back side the second metal tape in the low section small capacity double polarization antenna for base station of the present invention;
Figure 10 is the front projection schematic diagram of radiation fin in the low section small capacity double polarization antenna for base station of the present invention;
Figure 11 is the first balun support arm Facad structure schematic diagram in the low section small capacity double polarization antenna for base station of the present invention;
Figure 12 is the first balun support arm structure schematic diagram in the low section small capacity double polarization antenna for base station of the present invention;
Figure 13 is the second balun support arm Facad structure schematic diagram in the low section small capacity double polarization antenna for base station of the present invention;
Figure 14 is the second balun support arm structure schematic diagram in the low section small capacity double polarization antenna for base station of the present invention;
Figure 15 is that the low section small capacity double polarization antenna for base station of the present invention polarizes port less than 1.45 at two-way, frequency standing-wave ratio oscillogram in 1.71GHz to 2.17GHz scope;
Figure 16 is the present invention low section small capacity double polarization antenna for base station isolation at the two road ports isolation oscillogram more than 28dB;
Figure 17 is the low section small capacity double polarization antenna for base station horizontal plane beam angle oscillogram within the scope of the working band of 1.71GHz-2.17GHz of the present invention;
Figure 18 compares oscillogram than with cross polarization before and after the low section small capacity double polarization antenna for base station horizontal plane within the scope of the working band of 1.71GHz-2.17GHz of the present invention;
Figure 19 is the low section small capacity double polarization antenna for base station two cell array bs antenna gain curves within the scope of the working band of 1.71GHz-2.17GHz of the present invention.
[primary symbols explanation]
1-vibrator component; 11-radiation fin; 111-half-wave dipole antenna arm; 112-the first metal tape; 113-projection minor matters; 114-the first narrow slit; 115-cell body; 116-the second narrow slit; 117-narrow channel; 118-the second metal tape; 12-the first balun support arm; 121-the first microstrip line balun; 122-the first radiating patch point; 123-first welds the strong point; 124-second welds the strong point; 125-the 3rd welds the strong point; 126-the first balun ground wire; 127-the second radiating patch point; 128-the 4th welds the strong point; 129-the 5th welds the strong point; 13-the second balun support arm; 131-the second microstrip line balun; 132-the 3rd radiating patch point; 133-the 6th welds the strong point; 134-the 7th welds the strong point; 135-the second balun ground wire; 136-the 4th radiating patch point; 137-mates minor matters; 138-the 8th welds the strong point; 139-the 9th welds the strong point; 2-power distribution plate; 3-inner metal baffle plate; 4-reflecting plate; The vertical flange of 41-; 5-the first overlapping region; 6-the second overlapping region; 7-elongated slot; The short groove of 8-.
Detailed description of the invention
Accompanying drawing below with reference to the present invention; technical scheme in the embodiment of the present invention is carried out clear, complete description and discussion; obviously; a part of example of the only present invention as described herein; it it is not whole examples; based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into protection scope of the present invention.
As it is shown in figure 1, the invention discloses a kind of low section small capacity double polarization antenna for base station, including an antenna house (not shown and sign), 2, two pieces of inner metal baffle plates of some vibrator component 1, power distribution plate 3 and a reflecting plate 4, wherein:
Described antenna house covers at above described reflecting plate 4, and described vibrator component 1, power distribution plate 2 and inner metal baffle plate 3 are positioned at inside described antenna house;
Described reflecting plate 4 both sides are provided with vertical flange, for adjusting the horizontal plane beam angle of antenna; In other embodiments, it is possible to the size of reflecting plate 4 described in appropriate design, it is convenient to omit inner metal baffle plate 3. Such as S type reflecting plate as shown in Figure 4 or oblique 45 degree of reflecting plates.
Described power distribution plate 2 is positioned at front or the back side of described reflecting plate 4, and fixing with described reflecting plate 4 is connected;
Each described vibrator component 1 includes radiation fin 11 and a support arrangement (sign), and described radiation fin 11 is fixed on described power distribution plate 2 by described support arrangement; In the present embodiment, described support arrangement includes the first balun support arm 12 and the second balun support arm 13, and described radiation fin 11 is fixed on described power distribution plate 2 by the first balun support arm 12 and the second balun support arm 13 of orthogonal assembling;
Two pieces of described inner metal baffle plates 3 are symmetrical arranged about described vibrator component 1, and are fixed on described reflecting plate 4.As it is shown on figure 3, in the present embodiment, described inner metal baffle plate 3 is two pieces of L-type sheet metal parts, two pieces of described L-type sheet metal parts are symmetrical arranged along described vibrator component 1 centre mirror picture, and are fixed on described reflecting plate 4, for adjusting the cross polarization ratio of antenna.
In the present embodiment, described power distribution plate 2 is made up of printed circuit board (PCB), as shown in Figure 5. Described vibrator component 1 is assembled with it, it is achieved the antenna for base station of Unit two. It will be apparent that adopt more power distribution plate 2 and vibrator component 1, it may be achieved the antenna for base station of more units, different gains and beam angle. Additionally, in overall package mode, when described power distribution plate 2 is positioned at the front of described reflecting plate 4, after described vibrator component 1 is joined with described power distribution plate 2 groups and is connected, then it is connected by screw or rivet are fixing with described reflecting plate 4; Or when described power distribution plate 2 is positioned at the back side of described reflecting plate 4, described power distribution plate 2 is fixedly connected on described reflecting plate 4 back side by screw or rivet, and described vibrator component 1 is attached through the groove position on described reflecting plate 4 and described power distribution plate 2.
With reference to Fig. 6, described radiation fin 11 includes dielectric material plate (sign), described dielectric material plate front be provided with half-wave dipole antenna arm 111 and the first metal tape 112, wherein:
The quantity of described half-wave dipole antenna arm 111 is four, and each described half-wave dipole antenna arm 111 includes half-wave dipole antenna arm body (sign) and two protruding minor matters 113;
Four described half-wave dipole antenna arm bodies are respectively about described dielectric material plate centrosymmetry and in �� 45 �� of distributions (45 �� is a group ,-45 �� is a group), and adjacent two described half-wave dipole antenna arms 111 are close to each other, the first narrow slit 114 is left in centre, offer a cell body 115 in the middle of each described half-wave dipole antenna arm body, described cell body 115 along described dielectric material plate �� 45 �� of axis extend to the described half-wave dipole antenna arm body end away from described dielectric material plate center; Each described half-wave dipole antenna arm 111 is arranged in tong-like. In the present embodiment, each described half-wave dipole antenna arm 111 is the PCB type metal layers of copper of middle fluting, and becoming electrical connection connecting the first balun support arm 12 with the feed end of the second balun support arm 13, the end at described half-wave dipole antenna arm 111 disconnects. General performance is tong-like form.
It is provided with narrow channel 117 between two described protruding minor matters 113, described narrow channel 117 is through with described cell body 115 be connected and along described dielectric material plate �� 45 �� of axis arrange, two described protruding minor matters 113 are connected as a single entity with described half-wave dipole antenna arm body end, and are mirrored into symmetrical about described narrow channel 117; Preferably, described protruding minor matters 113 are right-angled trapezium or rectangle.
The quantity of described first metal tape 112 is four, each described first metal tape 112 is positioned at the outside of adjacent two described half-wave dipole antenna arms 111, and leaving the second narrow slit 116 near adjacent two described half-wave dipole antenna arm 111 places, two described first metal tapes 112 of Arbitrary Relative, are distributed with described first narrow slit 114 (i.e. the center slot of adjacent half-wave dipole antenna arm) axisymmetricly for axle.
With reference to Fig. 7, described half-wave dipole antenna arm 111 be shaped as that square, circular arc be petal or other polygon.In the present embodiment, it is possible to square is made into that circular arc is petal or polygon, suitable adjustment dimensional parameters, it is also possible to reach foursquare effect.
With reference to Fig. 8, described first metal tape 112 is metal band or T-shaped metal tape. In the present embodiment, it is possible to make T-shaped metal tape, suitable adjustment dimensional parameters, it is also possible to reach the effect of metal band into.
With reference to Fig. 9 and 10, the back side distribution of described dielectric material plate has four the second metal tapes 118, four described second metal tapes 118 are positioned at the edge of described dielectric material plate, and four described second metal tapes 118 enclose, and adjacent two described second metal tape 118 angles are 90 ��;
From front projection, there is the first overlapping region 5 in the half-wave dipole antenna arm 111 in described second metal tape 118 and described radiation fin 11 front, obviously, each described second metal tape 118 has 2 the first overlapping regions 5 with half-wave dipole antenna arm 111, and described first overlapping region 5 has eight;
In addition, it is also seen that, there is the second overlapping region 6 in first metal tape 112 in described second metal tape 118 and described radiation fin 11 front, described second overlapping region 6 has four.
Preferably, described second metal tape 118 is metal band or becket. In the present embodiment, becket can by suitable adjustment dimensional parameters, it is also possible to reach the effect of metal tape.
With reference to Figure 11, the front of described first balun support arm 12 includes first microstrip line balun the 121, first radiating patch point 122, first and welds the strong point the 123, second welding strong point 124 and the 3rd welding strong point 125, wherein:
The centre of described first balun support arm 12 has elongated slot 7, for forming orthogonal assembling with the second balun support arm 13;
Described first microstrip line balun 121 is direct-connected with described first radiating patch point 122;
The described 3rd welding strong point 125 is not connected with described first microstrip line balun 121;
The described first welding strong point 123, second welds the strong point 124 and the 3rd welding strong point 125 is made up of metal copper layer, supports and strengthens described radiation fin 11 and the mechanical fasteners of described power distribution plate 2 for welding, do not do electrical applications. Concrete, the front of described first balun support arm 12 and described power distribution plate 2 welds the strong point 123 by described first and the second welding strong point 124 is welded to connect, and the front of described first balun support arm 12 is passed through the described 3rd and welded the strong point 125 and be welded to connect with described radiation fin 11.
With reference to Figure 12, the back side of described first balun support arm 12 includes first balun ground wire the 126, second radiating patch point the 127, the 4th welding strong point 128 and the 5th welding strong point 129, wherein:
Described first balun ground wire 126 is direct-connected with described second radiating patch point 127;
The described 4th welding strong point 128 is not connected with described first balun ground wire 126;
The described 4th welding strong point 128 and the 5th welding strong point 129 are made up of metal copper layer, support and strengthen described radiation fin 11 and the mechanical fasteners of described power distribution plate 2 for welding, do not do electrical applications. Concrete, the back side of described first balun support arm 12 is welded the strong point 129 with described power distribution plate 2 by the described 5th and is welded to connect, and the back side of described first balun support arm 12 is welded the strong point 128 with described radiation fin 11 by the described 4th and is welded to connect.
With reference to Figure 13, also including the second balun support arm 13, the front of described second balun support arm 13 includes second microstrip line balun the 131, the 3rd radiating patch point the 132, the 6th welding strong point 133 and the 7th welding strong point 134, wherein:
The centre of described second balun support arm 13 has short groove 8, for forming orthogonal assembling with the first balun support arm 12;
Described second microstrip line balun 131 is direct-connected with described 3rd radiating patch point 132;
The described 6th welding strong point 133 is not connected with described second microstrip line balun 131;
The described 6th welding strong point 133 and the 7th welding strong point 134 are made up of metal copper layer, support and strengthen described radiation fin 11 and the mechanical fasteners of described power distribution plate 2 for welding, do not do electrical applications. Concrete, the front of described second balun support arm 13 is welded the strong point 134 with described power distribution plate 2 by the described 7th and is welded to connect, and the front of described second balun support arm 13 is welded the strong point 133 with described radiation fin 11 by the described 6th and is welded to connect.
With reference to Figure 14, the back side of described second balun support arm 13 includes the second balun ground wire the 135, the 4th radiating patch point 136, coupling minor matters the 137, the 8th weld the strong point 138 and the 9th welding strong point 139, wherein:
Described 4th radiating patch point 136, coupling minor matters 137 and the 8th welding strong point 138 are direct-connected with described second balun ground wire 135 respectively;
The described 9th welding strong point 139 is not connected with described second balun ground wire 135;
The described 8th welding strong point 138 and the 9th welding strong point 139 are made up of metal copper layer, support and strengthen described radiation fin 11 and the mechanical fasteners of described power distribution plate 2 for welding, do not do electrical applications. Concrete, the back side of described second balun support arm 13 is welded the strong point 138 with described power distribution plate 2 by the described 8th and is welded to connect, and the back side of described second balun support arm 13 is welded the strong point 139 with described radiation fin 11 by the described 9th and is welded to connect.
Preferably, 1/8th wavelength that height is Antenna Operation mid frequency of described first balun support arm 12 and the second balun support arm 13. It will be seen that the low section antenna for base station that the present invention proposes, structure assembling parts and way of realization and conventional macro base station antenna do not have difference, it does not have increase any extra parts and process complexity. Compared with prior art, the restriction of quarter-wave theoretical level is breached by the radiating pattern form innovated, overall section is reduced to mid frequency 1/8th wavelength, without extra any add-on parts, assembly technology is simple, light structure, is suitable for producing in enormous quantities, and electric property is better than the effect that prior art reaches, therefore the present invention is suitable for the design that small base station antenna is commercial so far the most.
By the elaboration of above-described embodiment, it is known that the key point that this invention is intended to lay special stress on protecting is in that:
One. it is printed in 4 second metal tapes at the radiation fin back side, project from surface, it is positioned at the lower section of adjacent two not like-polarized half-wave dipole antenna arms, near the outside of medium substrate, and in the protruding minor matters of each half-wave dipole antenna arm, there is identical part projection overlapping region. This overlapping region may be guided the electric current being positioned on half-wave dipole antenna arm and senses the metal tape of lower section, thus realizing weak coupling, form another current path, it is achieved the resonance of working band lower portion, complete radiation, and be effectively increased front and back ratio and the cross polarization ratio of oscillator.
Two. it is printed in two pairs of half-wave open mouth tongs shape dual polarized antennas in radiation fin front, 4 pairs of protruding minor matters loaded are had in open end, these projection minor matters further enhance the half-wave dipole antenna arm in radiation fin front and the coupling of second metal tape at the back side, be conducive to guiding current direction half-wave dipole antenna arm opening part, the appropriate size adjusting these projection minor matters, the impedance matching in whole working band can be realized, it is achieved ultra broadband works.
Three. it is printed in 4 metal bands in radiation fin front, compared with the second metal tape of the back side short, close coupling is formed with the electric current on half-wave dipole antenna arm, constitute high-frequency resonant, realize the impedance matching of the high band part of working band, improve the isolation of working frequency range low-frequency range part simultaneously.
Four, two groups of orthogonal half-wave dipole antenna arms in radiation fin front it are printed in, close to each other leave ultra-narrow gap, realize the close coupling of two-way cross polarization, the current convergence on the half-wave dipole antenna arm surface polarized by two-way is in both sides, gap, realize the low-cross polarization characteristic on aloft far field, improve the isolation in whole working frequency range. This is more good with the more big isolation in orthogonal oscillator gap in conventional basestation antennas theoretical contrary, and this is just the key that can realize low section.
Five. the reduction of antenna height, can cause balun length to reduce, be unsatisfactory for quarter-wave conversion, it is difficult to coupling, by the corrected altitude version compared with the grounded part of the second balun support arm of hypopolarization oscillator, it is achieved Broadband Matching.
In sum, the integrated use of above 5 key points, add the radiating doublet size that fine optimization designs, it is achieved that low section, by 0.25 wavelength antennas height reduction under traditional structure to 0.125 wavelength, and entirety reduces antenna house and reflector height size.
Additionally, accompanying drawing 15-19 is the relevant experimental data of the low section small capacity double polarization antenna for base station after adopting above-mentioned technical characteristic, wherein:
Figure 15 is that the low section small capacity double polarization antenna for base station of the present invention polarizes port less than 1.45 at two-way, frequency standing-wave ratio oscillogram in 1.71GHz to 2.17GHz scope, as seen from the figure, two-way polarization port is less than 1.45, and in the frequency range of 1.71GHz to 2.17GHz, coupling is good.
Figure 16 is the present invention low section small capacity double polarization antenna for base station isolation at the two road ports isolation oscillogram more than 28dB, and as seen from the figure, the isolation of two road ports is more than 28dB.
Figure 17 is the low section small capacity double polarization antenna for base station horizontal plane beam angle oscillogram within the scope of the working band of 1.71GHz-2.17GHz of the present invention, as seen from the figure, within the scope of the working band of 1.71GHz-2.17GHz, horizontal plane wave beam convergence is fine, and beam angle is between 64 ��-66 ��.
Figure 18 is that before and after the low section small capacity double polarization antenna for base station horizontal plane within the scope of the working band of 1.71GHz-2.17GHz of the present invention, ratio and cross polarization are than oscillogram, and as seen from the figure, than more than 25dB before and after general power, main polarization front and back ratio is more than 30dB; Cross polarization ratio (axially) is more than 31dB, and cross polarization ratio (sector) is more than 15dB.
Figure 19 is the low section small capacity double polarization antenna for base station two cell array bs antenna gain curves within the scope of the working band of 1.71GHz-2.17GHz of the present invention, and as seen from the figure, after gain is more than 11dB, along with the increase of frequency, gain also constantly increases.
The above; being only the present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention. Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (13)
1. one kind low section small capacity double polarization antenna for base station, it is characterised in that include an antenna house, some vibrator component, a power distribution plate, two pieces of inner metal baffle plates and a reflecting plate, wherein:
Described antenna house covers at above described reflecting plate, and described vibrator component, power distribution plate and inner metal baffle plate are positioned at inside described antenna house;
Described reflecting plate both sides are provided with vertical flange;
Described power distribution plate is positioned at front or the back side of described reflecting plate, and fixing with described reflecting plate is connected;
Each described vibrator component includes radiation fin and a support arrangement, and described radiation fin is fixed on described power distribution plate by described support arrangement;
Two pieces of described inner metal baffle plates are symmetrical arranged about described vibrator component, and are fixed on described reflecting plate.
2. low section small capacity double according to claim 1 polarization antenna for base station, it is characterised in that described radiation fin includes dielectric material plate, and the front of described dielectric material plate is provided with half-wave dipole antenna arm and the first metal tape, wherein:
The quantity of described half-wave dipole antenna arm is four, and each described half-wave dipole antenna arm includes a half-wave dipole antenna arm body and two protruding minor matters;
Four described half-wave dipole antenna arm bodies are respectively about described dielectric material plate centrosymmetry and in �� 45 �� of distributions, and leave the first narrow slit between adjacent two described half-wave dipole antenna arms, offer a cell body in the middle of each described half-wave dipole antenna arm body, described cell body along described dielectric material plate �� 45 �� of axis extend to the described half-wave dipole antenna arm body end away from described dielectric material plate center;
It is provided with narrow channel between two described protruding minor matters, described narrow channel is through with described cell body be connected and along described dielectric material plate �� 45 �� of axis arrange, two described protruding minor matters are connected as a single entity with described half-wave dipole antenna arm body end, and are mirrored into symmetrical about described narrow channel;
The quantity of described first metal tape is four, each described first metal tape is positioned at the outside of adjacent two described half-wave dipole antenna arms, and leaving the second narrow slit near adjacent two described half-wave dipole antenna arm places, two described first metal tapes of Arbitrary Relative, with described first narrow slit for axle, are distributed axisymmetricly.
3. low section small capacity double according to claim 2 polarization antenna for base station, it is characterised in that described half-wave dipole antenna arm be shaped as square or circular arc is petal.
4. low section small capacity double according to claim 2 polarization antenna for base station, it is characterised in that described first metal tape is metal band or T-shaped metal tape.
5. low section small capacity double according to claim 2 polarization antenna for base station, it is characterised in that described protruding minor matters are right-angled trapezium or rectangle.
6. low section small capacity double according to claim 2 polarization antenna for base station, it is characterized in that, the back side distribution of described dielectric material plate has four the second metal tapes, four described second metal tapes are positioned at the edge of described dielectric material plate, four described second metal tapes enclose, and adjacent two described second metal tape angles are 90 ��;
There is the first overlapping region in the half-wave dipole antenna arm in described second metal tape and described radiation fin front, described first overlapping region has eight;
There is the second overlapping region in first metal tape in described second metal tape and described radiation fin front, described second overlapping region has four.
7. low section small capacity double according to claim 6 polarization antenna for base station, it is characterised in that described second metal tape is metal band or becket.
8. low section small capacity double according to claim 1 polarization antenna for base station, it is characterised in that described support arrangement includes the first balun support arm and the second balun support arm, described first balun support arm and the second orthogonal assembling of balun support arm.
9. low section small capacity double according to claim 8 polarization antenna for base station, it is characterized in that, the front of described first balun support arm includes the first microstrip line balun, the first radiating patch point, the first welding strong point, the second welding strong point and the 3rd welding strong point, wherein:
The centre of described first balun support arm has elongated slot, is used for and the second orthogonal assembling of balun support arm;
Described first microstrip line balun is direct-connected with described first radiating patch point;
The described first welding strong point, the second welding strong point and the 3rd welding strong point are made by metal copper layer;
The front of described first balun support arm and described power distribution plate welds the strong point and second by described first and weld the strong point and be welded to connect;
The front of described first balun support arm is welded the strong point with described radiation fin by the described 3rd and is welded to connect.
10. low section small capacity double according to claim 8 polarization antenna for base station, it is characterised in that the back side of described first balun support arm includes the first balun ground wire, the second radiating patch point, the 4th welding strong point and the 5th welding strong point, wherein:
Described first balun ground wire is direct-connected with described second radiating patch point;
The described 4th welding strong point is not connected with described first balun ground wire;
The described 4th welding strong point and the 5th welding strong point are made by metal copper layer;
The back side of described first balun support arm is welded the strong point with described power distribution plate by the described 5th and is welded to connect;
The back side of described first balun support arm is welded the strong point with described radiation fin by the described 4th and is welded to connect.
11. low section small capacity double according to claim 8 polarization antenna for base station, it is characterised in that the front of described second balun support arm includes the second microstrip line balun, the 3rd radiating patch point, the 6th welding strong point and the 7th welding strong point, wherein:
The centre of described second balun support arm has short groove, is used for and the first orthogonal assembling of balun support arm;
Described second microstrip line balun is direct-connected with described 3rd radiating patch point;
The described 6th welding strong point and the 7th welding strong point are made by metal copper layer;
The front of described second balun support arm is welded the strong point with described power distribution plate by the described 7th and is welded to connect;
The front of described second balun support arm is welded the strong point with described radiation fin by the described 6th and is welded to connect.
12. low section small capacity double according to claim 8 polarization antenna for base station, it is characterized in that, the back side of described second balun support arm includes the second balun ground wire, the 4th radiating patch point, coupling minor matters, the 8th welding strong point and the 9th welding strong point, wherein:
Described 4th radiating patch point, coupling minor matters and the 8th welding strong point are direct-connected with described second balun ground wire respectively;
The described 8th welding strong point and the 9th welding strong point are made by metal copper layer;
The back side of described second balun support arm is welded the strong point with described power distribution plate by the described 8th and is welded to connect;
The back side of described second balun support arm is welded the strong point with described radiation fin by the described 9th and is welded to connect.
13. low section small capacity double according to claim 8 polarization antenna for base station, it is characterised in that 1/8th wavelength that height is Antenna Operation mid frequency of described first balun support arm and the second balun support arm.
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| CN201610190311.8A CN105655702B (en) | 2016-03-30 | 2016-03-30 | A kind of low section small capacity double polarization antenna for base station |
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| CN201610190311.8A CN105655702B (en) | 2016-03-30 | 2016-03-30 | A kind of low section small capacity double polarization antenna for base station |
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| CN112514165A (en) * | 2018-07-31 | 2021-03-16 | 株式会社友华 | Antenna device |
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| WO2020134362A1 (en) * | 2018-12-28 | 2020-07-02 | 瑞声声学科技(深圳)有限公司 | Antenna, antenna array and base station |
| CN109638428A (en) * | 2019-01-08 | 2019-04-16 | 广州亚美信息科技有限公司 | A kind of communication antenna of new generation applied to 5G |
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| WO2021088111A1 (en) * | 2019-11-04 | 2021-05-14 | 瑞声声学科技(深圳)有限公司 | Antenna array and base station |
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| CN113937493A (en) * | 2021-11-02 | 2022-01-14 | 苏州东山精密制造股份有限公司 | Low-frequency radiation unit and antenna array |
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