In prior art, the multifrequency antenna of compatible 2G and 3G frequency range, according to the relative position of 2G (low frequency) and 3G (high frequency) radiating element, two large classes can be divided into: a class is side-by-side mode, namely low frequency radiating element and high frequency radiating element organize battle array side by side separately, and the axle of two arrays is parallel but do not overlap; Another kind of is coaxial manner, i.e. low frequency radiating element and high frequency radiating element interval group battle array by a certain percentage, and part high frequency radiating element is nested in the inside of low frequency radiating element, and the axle of two arrays overlaps.The multifrequency antenna of above-mentioned side-by-side mode due to the radiating element of its different frequency range be placed side by side, antenna width can be relatively wide, and due to the boundary condition of radiating element be asymmetric, cause the beam direction of antenna pattern relatively poor, the symmetry of directional diagram is also relatively poor.
The structure of the many employings of low frequency radiating element four dipoles one group of orthogonal placement between two of the multifrequency antenna of above-mentioned coaxial manner, such as:
In technical scheme disclosed in patent US6819300B2, the orthographic projection of the radiating element be made up of four dipoles on reflecting plate is square, the radiation arm of each dipole, and namely square every bar limit and the vertical or horizontal of reflecting plate are 45° angle, as shown in Figure 1.In technical scheme disclosed in patent CN201134512Y, the orthographic projection of the radiating element be made up of four dipoles on reflecting plate is circular, distance between two dipoles of parallel opposed, namely the representative value of caliber size is 0.5 operation wavelength, as shown in Figure 2.
When low-and high-frequency coaxial group of battle array, the radiation arm end of radiating element described in patent US6819300B2 will, near adjacent high frequency radiating element, cause the electric property of high frequency radiating element to be affected.Bore has been modified into circle by square by radiating element described in patent CN201134512Y, reduce the impact of low frequency radiating element on adjacent high frequency radiating element to a certain extent, but when the working frequency range of high frequency expands to 3G & LTE2600 by 3G or in order to meet property requirement, and time group battle array spacing is reduced, the radiation arm end of low frequency radiating element still can near or part be positioned at the top of adjacent high frequency radiating element, to the electric property of high frequency radiating element, especially standing wave and isolation affect greatly, cause the high frequency radiating element of low frequency radiating element inside, high frequency radiating element between two low frequency radiating element is different with the electric property of single this three of high frequency radiating element, and low frequency radiating element inside has and does not have nested high frequency radiating element electric property also different, cause mutual coupling between low-and high-frequency array serious, electric property is significantly deteriorated, especially high band.Visible, the structure of appropriate design radiating element and size, it is very important for making the mutual coupling between radiating element little as far as possible, especially to the multifrequency antenna of compatible 2G, 3G and LTE2600 frequency range.
In summary, obviously there is inconvenience and defect in actual use, so be necessary to be improved in existing broadband dualpolarization radiation unit and antenna.
Summary of the invention
For above-mentioned defect, the object of the present invention is to provide a kind of broadband dualpolarization radiation unit and antenna, the mutual coupling between multifrequency antenna low-and high-frequency radiating element can be reduced, and structure is simple, easy to process, reliability is high, electric property is good.
To achieve these goals, the invention provides a kind of broadband dualpolarization radiation unit, form antenna for being installed on metallic reflection plate, described radiating element comprises the dipole of two pairs of orthogonal polarizations, for launching or receiving communication signal;
Each described dipole correspondence is connected with a pair Ba Lun, and the bottom of each Ba Lun is connected to a ring-shaped base; Described each dipole comprises the first radiation arm and second radiation arm of two asymmetric settings, and the radiation arm between adjacent two described dipoles is positioned at same plane.
According to broadband dualpolarization radiation unit of the present invention, non-conterminous two dipoles are symmetrical set mutually, and the distance between described symmetrically arranged two dipoles is 0.35 ~ 0.45 operation wavelength.
According to broadband dualpolarization radiation unit of the present invention, described first radiation arm is multi-section-line structure, it to be included in same plane and the connecting portion connected successively, the first main part and the first kink, and the first corner dimension of the formation of described first kink and described first main part is 45 ~ 135 °.
According to broadband dualpolarization radiation unit of the present invention, described second radiation arm is multi-section-line structure, it is included in the second main part in same plane and the second kink, and the second corner dimension that described second kink and described second main part are formed is 45 ~ 135 °.
According to broadband dualpolarization radiation unit of the present invention, described second radiation arm also has the tuning minor matters being connected to described second main part.
According to broadband dualpolarization radiation unit of the present invention, described first angle is different from the second corner dimension.
According to broadband dualpolarization radiation unit of the present invention, the angle that the plane at described first radiation arm place and the plane at described base place are formed is 40 ~ 60 °, and the angle that the plane at described second radiation arm place and the plane at described base place are formed also is 40 ~ 60 °.
According to broadband dualpolarization radiation unit of the present invention, described Ba Lun comprises interconnective straightway and arc.
According to broadband dualpolarization radiation unit of the present invention, the upper end corresponding to a Ba Lun of described dipole is provided with feeder line location notch, for connecting outer conductor; And
Feed bonding jumper, for connecting inner wire.
According to broadband dualpolarization radiation unit of the present invention, the cross section of described first radiation arm and/or the second radiation arm is parallelogram, circle, T-shaped, U-shaped or L shape.
The present invention also provides a kind of broadband dual polarized antenna comprising above-mentioned broadband dualpolarization radiation unit, comprises at least one described broadband dualpolarization radiation unit be located on metallic reflection plate.
According to broadband dual polarized antenna of the present invention, described broadband dualpolarization radiation unit is provided with a high frequency unit, and described broadband dualpolarization radiation unit is electrically arranged at described metallic reflection plate by described base.
According to broadband dual polarized antenna of the present invention, described metallic reflection plate is provided with multiple evenly distributed described broadband dualpolarization radiation unit, and is equipped with high frequency unit described between adjacent two described broadband dualpolarization radiation units.
The present invention passes through the dipole realization of orthogonal polarization to the reception of signal and transmission, and each dipole, to having a pair Ba Lun in order to realize balanced feeding, is connected to an annular base bottom each Ba Lun.Each dipole comprises the first radiation arm and second radiation arm of asymmetric setting, and the radiation arm between adjacent two described dipoles is positioned at same plane.Whereby, the present invention can reduce the mutual coupling between multifrequency antenna low-and high-frequency radiating element, and structure is simple, easy to process, reliability is high, electric property is good.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
See Fig. 3 ~ Fig. 5, the invention provides a kind of broadband dualpolarization radiation unit, it forms antenna for being installed on metallic reflection plate, concrete, this broadband dualpolarization radiation unit 20 comprises two dipole 2a, 2b, 2c and 2d to totally four orthogonal polarizations, for launching or receiving communication signal.Four dipoles 2a, 2b, 2c are connected a pair Ba Lun with each correspondence of 2d difference, wherein each Ba Lun comprises interconnective straightway and arc, for the Ba Lun that dipole 2a connects, wherein a Ba Lun comprises arc 2a1 and straightway 2a2, and another corresponding Ba Lun comprises 2a1 ' and 2a2 '.Same, the Ba Lun that dipole 2b, 2c and 2d are corresponding is respectively 2b1 and 2b2,2b1 ' and 2b2 ', 2c1 and 2c2,2c1 ' and 2c2 ', 2d1 and 2d2,2d1 ' and 2d2 '.The bottom of above-mentioned Ba Lun is all connected to an annular base 2e.
Dipole 2a comprises the first radiation arm and second radiation arm of two asymmetric settings, and the first radiation arm is multi-section-line structure, it to be included in same plane and the connecting portion 2a3 connected successively, the first main part 2a4 and the first kink 2a5, and the first corner dimension of the formation of described first kink 2a5 and described first main part 2a4 is 45 ~ 135 °.The second described radiation arm is also multi-section-line structure, and it is included in the second main part 2a4 ' in same plane and the second kink 2a5 ', and the second kink 2a5 ' is 45 ~ 135 ° with the second corner dimension of the second main part 2a4 ' formation.
In the present embodiment, corresponding, dipole 2b comprises 2a3,2a4,2a5,2a4 ' and 2a5 ', dipole 2c comprises 2c3,2c4,2c5,2c4 ' and 2c5 ', dipole 2d comprises 2d3,2d4,2d5,2d4 ' and 2d5 ', dipole 2a, 2b, 2c are identical with the structure of 2d, therefore do not repeat them here above architectural feature.Preferably, in the present embodiment, each second radiation arm is also provided with tuning minor matters, in conjunction with dipole 2a, its tuning minor matters 2a3 ' is connected to the second main part 2a4 ', corresponding, dipole 2b, 2c and 2d also have tuning minor matters 2b3 ', 2c3 ' and 2d3 ' respectively.
Further, dipole 2a and 2c parallel opposed, the spacing of the two is preferably 0.35 ~ 0.45 operation wavelength; Dipole 2b and 2d parallel opposed, the two spacing is also preferably 0.35 ~ 0.45 operation wavelength, and dipole 2a and 2c is orthogonal to dipole 2b and 2d, forms two orthogonal polarization.
For dipole 2a, its first radiation arm and the second radiation arm are asymmetric setting.First radiation arm is joined end to end by 2a3,2a4,2a5 tri-sections and forms, and the other end of 2a3 is connected with the upper end of Ba Lun 2a2, stretches out, and the angular range between 2a4 and 2a5 is 45 ~ 135 °.2a3,2a4,2a5 tri-sections is in same plane, and the angular range of this plane and described radiating element 20 (base 2e) place plane is 40 ~ 60 °.Easily see, the 2a3 of the first radiation arm, 2a4,2a5 are gradually to the centre convergence of described radiating element 20.In multifrequency antenna application, this technical characteristic can zoom out the distance between low frequency cell and adjacent high frequency unit relatively, obviously reduces low frequency cell to the impact of adjacent high frequency unit, especially on the impact of standing wave and isolation.
Second radiation arm of dipole 2a is made up of 2a3 ', 2a4 ', 2a5 ' tri-sections, 2a4 ' and 2a5 ' joins end to end, the other end of 2a4 ' is connected with the upper end of Ba Lun 2a2 ', stretch out, 2a3 ' is tuning minor matters, its one end is connected with Ba Lun 2a2 ', and the other end is connected with 2a4 ', and the angular range of between 2a4 ' and 2a5 ' is 45 ~ 135 °.And 2a3 ', 2a4 ' and 2a5 ' tri-sections is in same plane, the angular range of this plane and radiating element 20 place plane is 40 ~ 60 °.Obviously, 2a3 ', the 2a4 ' of the second radiation arm, 2a5 ' are gradually to the centre convergence of described radiating element 20.In multifrequency antenna application, this feature can zoom out the distance between low frequency cell and adjacent high frequency unit relatively, obviously reduces low frequency cell to the impact of adjacent high frequency unit, especially on the impact of standing wave and isolation.
In embody rule, the disequilibrium of electric current on tuning minor matters 2a3 ' energy effective compensation dipole 2a two radiation arms, Bandwidth.Certainly, the present invention also can by suitably adjusting the shape of 2a5 and 2a5 ', size or other similar means compensate the disequilibrium of dipole feed, and then improve the electric property of described radiating element 20, and make the electric property change of radiating element 20 when nested inside high frequency unit very little.
Ba Lun 2a1 with 2a2 of dipole 2a is connected, 2a1 ' is connected with 2a2 ', 2a1 with 2a1 ' is connected with base 2e, 2a1 and 2a1 ' less parallel is arranged, 2a2 and 2a2 ' less parallel is arranged, and 2a1 and 2a1 ' is arc, can relatively zoom out described radiating element 20 and and be nested in radiating element 20 inside high frequency unit between distance, obvious reduction low frequency cell on the impact of high frequency unit, especially on the impact of standing wave and isolation.Certainly, 2a1 and 2a2,2a1 ' and 2a2 ' also can be the combination of other forms of multi-section-line.
The upper end, the back side of the Ba Lun 2a2 of dipole 2a is provided with feeder line location notch 2a6, and the upper end of 2a2 ' is provided with feed bonding jumper 2a0.Feeder line goes to location notch 2a6 along Ba Lun 2a1, and outer conductor and location notch 2a6 weld together, and inner wire and feed bonding jumper 2a0 weld together.Make the structure of dipole 2a simple, reliable whereby, there is good consistency.
In the present embodiment, first radiation arm of dipole 2a and/or the cross section of the second radiation arm are parallelogram, circle, T-shaped, U-shaped or L shape and dipole 2b, 2c and 2d, have identical architectural feature, therefore do not repeat them here with dipole 2a.
Preferably, base 2e is provided with four screw hole position 2e1, described radiating element 20 can be fixed by 2e1.And radiating element 20 is processed by integrated die cast process, have convenient processing, reliability is high, the feature that consistency is good.
Again as previously mentioned, dipole 2a and 2c parallel opposed, 2b and 2d parallel opposed, dipole 2a and 2c is orthogonal to dipole 2b and 2d, forms two orthogonal polarization.Accordingly, the feeder line of dipole 2a and 2c is in parallel, forms the common feed point of a polarization; The feeder line of dipole 2b and 2d is in parallel, and form the common feed point of another polarization, these two polarization are orthogonal.
Fig. 6 and Fig. 7 is the structural representation of the radiating element of another embodiment of the present invention, and in this embodiment, dipole 2a, 2b, 2c are also identical with 2d structure, and four dipoles all do not have tuning minor matters.Still be illustrated for dipole 2a at this, formation first angle of the first kink 2a5 and the first main part 2a4, the second angle of the second kink 2a5 ' and the second main part 2a4 ' formation, varying in size of the first angle and the second angle.This asymmetric setting can compensate the disequilibrium of two polarization of described radiating element 20, and then improves the electric property of described radiating element 20.
Better, also the bearing of trend of 2a5 and 2a5 ', 2b5 and 2b5 ', 2c5 and 2c5 ' and 2d5 and 2d5 ' can be changed into other mode in the present embodiment.Such as 2a5 and 2a5 ', 2c5 and 2c5 ' parallel to each other, spacing is constant; 2b5 and 2b5 ', 2d5 and 2d5 ' not parallel each other, spacing gradual change, with the disequilibrium of two of compensating for radiation unit 20 polarization, and then improves described radiating element performance, and it is very little that the electric property of the high frequency unit being nested in radiating element 20 inside is changed.
Radiating element 20 of the present invention radiating element of the present invention has miniaturization, the feature that broadband, radiance are good, the mutual coupling of group battle array is little.In addition, radiating element 20 structure is simple, convenient processing, and reliability is high, can flexible Application in various single-frequency, multifrequency antenna.
See Fig. 8, the invention provides a kind of broadband dual polarized antenna comprising above-mentioned radiating element, it comprises metallic reflection plate 10, and metallic reflection plate 10 is provided with at least one described radiating element 20, and radiating element 20 by its base 2e arrange screw hole position 2e1 and reflecting plate 10 be electrically connected.
Again see Fig. 9, in another embodiment of the present invention, the metallic reflection plate 10 of broadband dual polarized antenna is provided with multiple evenly distributed broadband dualpolarization radiation unit 20, each radiating element 20 inside is embedded with a high frequency unit 30, and is equipped with high frequency unit 30 described between adjacent two broadband dualpolarization radiation units 20.
Radiating element 20 bore of the present invention is little, the angular range of radiation arm place plane and described radiating element 20 place plane is 40 ~ 60 °, radiation arm is gradually to the centre convergence of described radiating element 20, therefore, it is possible to obviously reduce low frequency cell and described radiating element 20 to the impact of high frequency unit, especially on the impact of standing wave and isolation.
The electric property of the low-and high-frequency array of of the present invention pair of broadband dual polarized antenna is independent of one another, can all keep good electric property in 2G, 3G and LTE2600 frequency range.
In sum, the present invention passes through the dipole realization of orthogonal polarization to the reception of signal and transmission, and each dipole, to having a pair Ba Lun in order to realize balanced feeding, is connected to an annular base bottom each Ba Lun.Each dipole comprises the first radiation arm and second radiation arm of asymmetric setting, and the radiation arm between adjacent two described dipoles is positioned at same plane.Whereby, the present invention can reduce the mutual coupling between multifrequency antenna low-and high-frequency radiating element, and structure is simple, easy to process, reliability is high, electric property is good.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.