CN203232955U - Antenna oscillator and antenna with same - Google Patents
Antenna oscillator and antenna with same Download PDFInfo
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- CN203232955U CN203232955U CN 201320217089 CN201320217089U CN203232955U CN 203232955 U CN203232955 U CN 203232955U CN 201320217089 CN201320217089 CN 201320217089 CN 201320217089 U CN201320217089 U CN 201320217089U CN 203232955 U CN203232955 U CN 203232955U
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Abstract
The utility model is applicable to the technical field of antenna structure, and provides an antenna oscillator and an antenna with the antenna oscillator. The antenna oscillator comprises an oscillator component. The oscillator component comprises a radiation part and a balun part. The antenna oscillator further comprises a parasitic component. The parasitic component comprises an upper parasitic member and a lower parasitic member. The upper parasitic member is arranged above the oscillator component. The lower parasitic member is annular and is sleeved on the periphery of the oscillator component. The upper parasitic member is flaky. The antenna comprises a feed component, a reflection component and the antenna oscillator. The oscillator component is connected with the reflection component. The feed component is connected with the oscillator component. According to the antenna provided by the utility model, due to beneficial secondary radiation caused by the parasitic component and the oscillator component, the antenna still can reach the set half power beam width under the condition that the size of the reflection component is very small, and has the significant advantage of miniaturization.
Description
Technical field
The utility model belongs to the antenna structure field, relates in particular to a kind of antenna oscillator and has the antenna of this antenna oscillator.
Background technology
The antenna of base station has been played the part of the effect of forming a connecting link in mobile communication system, be the transducer of electromagnetic emission and acceptance.The performance of antenna is to its conclusive effect of whole communication system, and its input cost only accounts for the antenna of a few percent of whole base station total cost, however good 30% to 50% of the base station system reliability that but can influence of its performance.Therefore, a secondary high performance antenna can relax the designing requirement of system and the performance of raising whole system.
Along with the network coverage of China's mobile communication and the continuous increase of capacity, antenna for base station quantity sharply increases, channel is crowded, electromagnetic environment worsens, antenna for base station is installed complicated, taking up an area of problems such as the big and base station selection in space is more and more difficult highlights day by day, the research of novel antenna for base station becomes the problem that presses for solution, in general, novel antenna for base station mainly adopts the MIMO technology, the dual polarized antenna technology, active integral antenna technology, technology such as electromagnet material antenna technology, antenna for base station is also to miniaturization simultaneously, the broadband, multiband, these several directions of various requirement of high efficiency and energy adaptive system develop.Along with the continuous enhancing of people's environmental consciousness and health perception, people take the attitude repelled to the antenna for base station that sets up on the building of city day by day, and therefore, it is particularly important that the miniaturization of antenna seems.In addition, the wind that the reducing of antenna size can reduce antenna carries, thereby reduces the installation requirement of antenna.
The miniaturization design of antenna for base station is mainly considered from two aspects.On the one hand, the miniaturization of antenna for base station need be selected suitable antenna form, and antenna for base station form commonly used mainly contains vibrator type, patch-type and ring-like, and modal is vibrator type, compares classical straight-arm oscillator, and plane dipole can be realized miniaturization to a certain extent.On the other hand, antenna for base station need increase a much bigger reflecting plate of electric size behind at oscillator usually and produce directed radiation, utilize reflecting plate to come ride gain, beamwidth and front and back ratio simultaneously, so the size of reflecting plate has determined the overall dimensions of antenna for base station.
In general, the size of reflecting plate is more big, and the front and back of antenna are more better than performance, also is conducive to the control of directional diagram simultaneously, but tends to cause the overall dimensions of antenna for base station to become big like this.It is 65 ° ± 5 ° that the horizontal plane half-power beam width of antenna for base station requires usually, in order to satisfy this condition, conventional antenna for base station has to control wave beam by the size that increases reflecting plate, this makes the miniaturization of antenna for base station become very difficult, antenna of the prior art, its size is bigger, causes installing inconvenient.
The utility model content
The utility model provides a kind of antenna oscillator and has had the antenna of this antenna oscillator, and its size is little, easy for installation.
On the one hand, as first kind of performance, the utility model provides a kind of antenna oscillator, comprises oscillator component, and described oscillator component comprises Department of Radiation and Ba Lun portion, and described Department of Radiation is one-body molded with Ba Lun portion or fixedly connected; Described antenna oscillator also comprises for the coupling of described oscillator component and produce the parasitic element of secondary radiation; Described parasitic element comprises parasitic structure and following parasitic structure, describedly goes up the top that parasitic structure is arranged at described oscillator component, described parasitic structure down in the form of a ring, described following parasitic structure is placed in described oscillator component periphery; Described upward parasitic structure in the form of sheets.
In conjunction with first kind of performance, as second kind of performance, described Department of Radiation integrally casting takes shape in an end of described Ba Lun portion, the other end of described Ba Lun portion fixedly is welded in or is fixedly connected on described reflection part by locking member, described Department of Radiation comprises a plurality of radiating doublets, and each described radiating doublet circumferentially is spaced and is connected in the described Ba Lun portion.
In conjunction with second kind of performance, as the third performance, described oscillator component is ± 45 ° of dual polarization cross oscillators, and described radiating doublet is tabular or ring-type.
In conjunction with the third performance, as the 4th kind of performance, described radiating doublet is tabular, vertical plate portion that it comprises the transverse plate part and is connected in described transverse plate part.
In conjunction with the 4th kind of performance, as the 5th kind of performance, described transverse plate partly is the isosceles trapezoid shape, and its short base integrally casting takes shape in described Ba Lun portion, and described vertical plate portion integrally casting takes shape in the long base of described transverse plate part.
In conjunction with any performance in first to five, as the 6th kind of performance, the described parasitic structure that goes up is tabular, and described parasitic structure down in the form of a ring.
Second aspect, as first kind of performance of second aspect, the utility model provides a kind of antenna, comprises the antenna oscillator described in feeding pack, reflection part and the first aspect, described oscillator component is connected in described reflection part, and described feeding pack is connected in described oscillator component.
In conjunction with first kind of performance of second aspect, as second kind of performance of second aspect, described Ba Lun portion is provided with for the separate slot that described Ba Lun portion is divided into a plurality of branches.
Second kind of performance in conjunction with second aspect, as the third performance of second aspect, described radiating doublet is provided with four, described separate slot is provided with two and described Ba Lun portion is divided into four branches, two described separate slot square crossings arrange, four described branches are respectively first branch, second branch, the 3rd branch and the 4th branch, and wherein said first branch and described the 3rd branch diagonal angle arrange, and described second branch and described the 4th branch diagonal angle arrange.
In conjunction with the third performance of second aspect, as the 4th kind of performance of second aspect, be provided with power feed hole in described first branch and second branch, be provided with balancing hole in described the 3rd branch and the 4th branch; Described feeding pack comprises two feed bodies, and described feed body comprises the feed dielectric body and is connected in the feed probes of described feed dielectric body; Wherein the feed dielectric body of a described feed body is arranged in the power feed hole of described first branch, and described feed probes is connected in described the 3rd branch or is connected on the radiating doublet in the 3rd branch; The feed dielectric body of another described feed body is arranged in the power feed hole of described second branch, and described feed probes is connected in described the 4th branch or is connected on the radiating doublet in the 4th branch, and the feed probes of two described feed bodies is crisscross arranged.
In conjunction with any performance in first to fourth of second aspect, as the 5th kind of performance of second aspect, a described reflection part and described oscillator component end in opposite directions is provided with reflection cavity, described reflection cavity is cambered surface or conical surface-shaped, the central authorities of described reflection cavity are provided with installing hole, and the other end of described Ba Lun portion inserts described installing hole and is fixedly connected on described reflection part.
In conjunction with any performance in first to fourth of second aspect, as the 6th kind of performance of second aspect, described to go up parasitic structure rectangular tabular and arrange with described oscillator component spacing, and described first support of parasitic structure by insulation of going up is connected in described oscillator component or described reflection part or installed surface.
In conjunction with any performance in first to fourth of second aspect, as the 7th kind of performance of second aspect, described parasitic structure down is the polygon ring-type and between described Department of Radiation and described reflecting part, described parasitic structure down is connected in described oscillator component or described reflection part or installed surface by second support of insulation.
In conjunction with any performance in first to fourth of second aspect, as the 8th kind of performance of second aspect, the profile of described reflection part is square, and the described parasitic structure that goes up is square, and described two diagonal going up parasitic structure parallel with wherein two outer side edges of described reflection part; Described parasitic structure down is the octagon ring-type, and the four edges that described parasitic structure down is separated by parallels with four outer side edges of described reflection part.
In conjunction with the 8th kind of performance of second aspect, as the 9th kind of performance of second aspect, the described parasitic structure lateral dimension of going up is less than the sectional dimension of described Department of Radiation; The interior ring size of described parasitic structure down is greater than the sectional dimension of Department of Radiation, and a described reflection part and described oscillator component end in opposite directions is provided with reflection cavity.
Antenna oscillator provided by the utility model and have the antenna of this antenna oscillator, it is by being provided for the coupling of described oscillator component and producing the parasitic element of secondary radiation, the useful secondary radiation that parasitic element and oscillator component cause makes antenna still can reach the half-power beam width of setting under the small-sized situation of reflection part, have the remarkable advantage of miniaturization, and then can be used as array element and be applied in the design of high performance miniaturization antenna for base station.
Description of drawings
Fig. 1 (a) is the integral body assembling schematic perspective view of the antenna that provides of the utility model embodiment;
Fig. 1 (b) is the front view of the antenna that provides of the utility model embodiment;
Fig. 1 (c) is the vertical view of the antenna that provides of the utility model embodiment;
Fig. 2 (a) is the schematic perspective view of oscillator component in the antenna oscillator that provides of the utility model embodiment;
Fig. 2 (b) is the vertical view of oscillator component in the antenna oscillator that provides of the utility model embodiment;
Fig. 2 (c) is the upward view of oscillator component in the antenna oscillator that provides of the utility model embodiment;
Fig. 3 is the schematic perspective view of feeding pack in the antenna that provides of the utility model embodiment;
Fig. 4 (a) is the schematic perspective view of reflection part in the antenna that provides of the utility model embodiment;
Fig. 4 (b) is the vertical view of reflection part in the antenna that provides of the utility model embodiment;
Fig. 5 (a) is the schematic perspective view of parasitic element in the antenna oscillator that provides of the utility model embodiment;
Fig. 5 (b) is the vertical view of parasitic element in the antenna oscillator that provides of the utility model embodiment;
Fig. 6 is the operating frequency-standing-wave ratio curve chart in the antenna that provides of the utility model embodiment;
Fig. 7 is the operating frequency-port coupling coefficient curve chart of the antenna that provides of the utility model embodiment;
Fig. 8 (a) is the antenna that provides of the utility model embodiment horizontal plane radiation pattern at the 2.5GHz Frequency point when-45 ° of oscillator lists feedbacks;
Fig. 8 (b) is the antenna that provides of the utility model embodiment horizontal plane radiation pattern at the 2.56GHz Frequency point when-45 ° of oscillator lists feedbacks;
Fig. 8 (c) is the antenna that provides of the utility model embodiment horizontal plane radiation pattern at the 2.69GHz Frequency point when-45 ° of oscillator lists feedbacks;
Fig. 9 (a) is the vertical plane radiation patterns of the antenna that provides of the utility model embodiment 2.5GHz Frequency point when-45 ° of oscillator lists feedbacks;
Fig. 9 (b) is the vertical plane radiation patterns of the antenna that provides of the utility model embodiment 2.56GHz Frequency point when-45 ° of oscillator lists feedbacks;
Fig. 9 (c) is the vertical plane radiation patterns of the antenna that provides of the utility model embodiment 2.69GHz Frequency point when-45 ° of oscillator lists feedbacks;
Figure 10 is that the antenna ± 45 ° oscillator that the utility model embodiment provides gathers in the index of the 3dB of each Frequency point horizontal beam width, 3dB vertical beam width, cross polarization ratio, module gain and main poleization front and back ratio.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Shown in Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c), a kind of antenna oscillator that the utility model embodiment provides can be used as array element and is applied in the antenna on the mobile communication base station.
Shown in Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c), above-mentioned antenna oscillator comprises oscillator component 11 and is used for oscillator component 11 couplings and produces the parasitic element 14 of secondary radiation.Oscillator component 11 can be connected in the reflection part 13 in the antenna, can be connected with feeding pack 12 on the oscillator component 11.During concrete the application, feeding pack 12 is connected in oscillator component 11, and oscillator component 11 is connected in reflection part 13.Oscillator component 11 comprises Department of Radiation 111 and Ba Lun portion 112, and Department of Radiation 111 and Ba Lun portion 112 are one-body molded or fixedly connected.Ba Lun portion 112 can be used for carrying out balanced feeding and supports Department of Radiation 111.Ba Lun is the English transliteration of balun, principle is by antenna theory, dipole antenna belongs to the balanced type antenna, and coaxial cable belongs to unbalanced line, if with its direct connection, then the crust of coaxial cable just has high-frequency current to flow through (to press the coaxial cable transmission principle, high-frequency current should be in the cable internal flow, and crust is screen, is not have electric current), so, will influence the radiation of antenna.Therefore, will between antenna and cable, add balun, the electric current that flows into the cable shield outside is controlled to fall, and that is to say the high-frequency current that flows through the cable shield crust from oscillator is blocked.Department of Radiation 111 one are connected in an end of Ba Lun portion 112, and the other end of Ba Lun portion 112 is connected in reflection part 13.But oscillator component 11 integrally casting moulding, it can effectively improve the consistency of oscillator component 11, and can increase interport isolation and cross polarization ratio, can also shorten the manufacturing cycle in addition and reduce manufacturing cost.
As Fig. 1 (a), shown in Fig. 1 (b) and Fig. 1 (c), parasitic element 14 is by being coupled with oscillator component 11 and producing useful secondary radiation, can play the effect of control wave beam width and main poleization front and back ratio, to increase impedance bandwidth and the sharpening main beam of antenna, having solved comes control wave beam width and front and back than causing the excessive problem of antenna size by the size that increases reflecting plate in the prior art, thereby guaranteeing half-power beam, before and after than meeting under the prerequisite such as index, impedance bandwidth and directional diagram bandwidth have been increased, dwindle the size of the reflection part 13 of profile maximum in the antenna, and then make antenna realize miniaturization, be beneficial to and reduce the required installing space of antenna, reduce production cost and the installation cost of antenna, make antenna be convenient to install.And, realize the sharpening of wave beam and widening of antenna frequency band by parasitic element 14, the antenna that the utility model embodiment is provided can be realized sharing of a plurality of networks, also can be high performance IMT-Advanced(International Mobile Telecommunications-Advanced, senior international mobile communication) the required active integral antenna of system provides design.
Particularly, shown in Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c), parasitic element 14 comprises parasitic structure 141 and following parasitic structure 142, and last parasitic structure 141 is arranged at the top of oscillator component 11 and apart arranges with oscillator component 11, to form useful secondary radiation.Following parasitic structure 142 in the form of a ring, following parasitic structure 142 be placed in oscillator component 11 peripheral and with oscillator component 11 spacing settings, to form useful secondary radiation.Last parasitic structure 141 and following parasitic structure 142 all separate with oscillator component 11, namely go up parasitic structure 141 and following parasitic structure 142 and all do not have the relation that is electrically connected with oscillator component 11, to form coupling.Last parasitic structure 141 and following parasitic structure 142 can resonance at low frequency end, expanded bandwidth to low frequency, dricetor element can resonance at front end, expanded bandwidth to high frequency, aggregate performance is the impedance bandwidth that has increased oscillator.Conventional oscillator need guarantee to gain and suitable beamwidth at a bigger reflecting plate of relative size; And antenna provided by the utility model, because the existence of parasitic element 14 can guarantee higher gain and suitable beamwidth under the less reflecting plate condition of relative size.This is because oscillator component 11(dricetor element), the secondary radiation of parasitic element 14 and the primary radiation of oscillator superpose in principal direction, thereby obtain than the higher gain of independent oscillator and narrower wave beam.Last parasitic structure 141 can be in the form of sheets, and for example rounded sheet, the cross section of the sheet, the profile that are square of profile is curved or corrugated sheet etc.
Particularly, shown in Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c), Department of Radiation 111 integrally castings take shape in an end of Ba Lun portion 112, and the other end of Ba Lun portion 112 fixedly is welded in or is fixedly connected on reflection part 13 by locking member.
Particularly, shown in Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c), oscillator component 11 can be ± oscillator of 45 ° of dual polarization cross oscillators or other type, radiating doublet can be tabular or ring-type or other suitable shape.Adopt dual polarized antenna can significantly reduce number of antennas, simplify antenna works and install, reduce antenna occupation of land space.
Particularly, shown in Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c), in the present embodiment, it is tabular that radiating doublet is, vertical plate portion 1112 that it comprises transverse plate part 1111 and is connected in transverse plate part 1111.Transverse plate part 1111 is the plane dipole structure, and it is with respect to arm-type structure classical in the prior art, and plane dipole can be realized miniaturization to a certain extent.And by further at the arranged outside of transverse plate vertical plate portion 1112 of turnover upwards, it can prolong current path, thereby further is beneficial to the miniaturization design that realizes oscillator.
Particularly, in the present embodiment, shown in Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c), transverse plate part 1111 is the isosceles trapezoid shape, its short base integrally casting takes shape in Ba Lun portion 112, and vertically plate portion 1112 integrally castings take shape in the long base of transverse plate part 1111.Be appreciated that ground, radiating doublet also can be set at suitable shape according to actual conditions.
In the present embodiment, owing to utilized Department of Radiation 111 and Ba Lun portion 112 integrated casting designs, guaranteed the consistency of antenna; The isosceles trapezoidal structure that radiating doublet is designed to bend has reduced the horizontal area of oscillator to a certain extent; Last parasitic structure 141, following parasitic structure 142 form useful secondary radiation by coupling, under the small-sized condition of reflection part 13, can play the effect of control wave beam and main poleization front and back ratio, owing to significantly reducing of reflection part 13 sizes, antenna for base station can further be realized miniaturization.
The utility model also provides a kind of antenna, and it comprises feeding pack 12, reflection part 13 and above-mentioned antenna oscillator, and described oscillator component 11 is connected in described reflection part 13, and described feeding pack 12 is connected in described oscillator component 11.
Particularly, shown in Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c), Ba Lun portion 112 is provided with for the separate slot 110 that Ba Lun portion 112 is divided into a plurality of branches, Department of Radiation 111 comprises a plurality of radiating doublets, in the present embodiment, radiating doublet is provided with four, is respectively radiating doublet 110a, 110b, 110c and 110d, and each radiating doublet 110a, 110b, 110c and 110d circumferentially are spaced and are connected in the branch of Ba Lun portion 112.Separate slot 110 degree of depth are to be extended to apart from the bottom of Ba Lun portion 112 by irradiator surface to locate or be set to other degree of depth for 1 to 5 millimeter.
Particularly, shown in Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c), in the present embodiment, separate slot 110 is provided with two and Ba Lun portion 112 is divided into four branches.The cross section of Ba Lun portion 112 is square, two separate slot 110 square crossings arrange to wait decibar human relations portion 112, four branches are respectively first 112a of branch, second 112b of branch, the 3rd 112c of branch and the 4th 112d of branch, wherein first 112a of branch and the 3rd branch 112c diagonal angle arrange, and second 112b of branch and the 4th branch 112d diagonal angle arrange.
Particularly, shown in Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c), all cut and be provided with triangular groove 1124 at the place, diagonal angle of the place, diagonal angle of first 112a of branch and the 3rd 112c of branch, the 3rd 112c of branch and the 4th 112d of branch, and triangular groove 1124 is dark with separate slot 110 grades.Like this, can improve interport isolation and increase the cross polarization ratio, under the prerequisite of antenna miniaturization, improve the performance of antenna.
Particularly, as Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c) and shown in Figure 3, feeding pack 12 comprises two feed bodies, and the feed body comprises feed dielectric body 121 and is connected in the feed probes 122 of feed dielectric body 121; Be provided with power feed hole 1121 on first 112a of branch and second 112b of branch, power feed hole 1121 is used for filling feed probes 122 and feed dielectric body 121, is respectively ± 45 ° of oscillator feeds.Be provided with balancing hole 1122 on the 3rd 112c of branch and the 4th 112d of branch; Wherein the feed dielectric body 121 of a feed body is arranged in the power feed hole 1121 of first 112a of branch, and feed probes 122 can be connected in the 3rd 112c of branch or is connected on the radiating doublet 111c on the 3rd 112c of branch by modes such as welding; The feed dielectric body 121 of another feed body is arranged in the power feed hole 1121 of second 112b of branch, feed probes 122 can be connected in the 4th 112d of branch or is connected on the radiating doublet 111d on the 4th 112d of branch by modes such as welding, and the feed probes 122 of two feed bodies is crisscross arranged.
Particularly, as Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c) and shown in Figure 3, the upper end of the upper end of first 112a of branch and the 3rd 112c of branch offers respectively be used to holding the wherein first breach 1123a and the 3rd breach 1123c of a feed probes 122, the upper end of the upper end of second 112b of branch and the 4th 112d of branch offers respectively be used to the second breach 1123b that holds another feed probes 122 and the 4th breach 1123d, and the second breach 1123b and the 4th breach 1123d are deeper than or are shallower than the first breach 1123a and the 3rd breach 1123c, like this, two feed bodies can shift to install up and down, be independent of each other, the antenna reliability is good.By the first breach 1123a and the 3rd breach 1123c, the second breach 1123b and the 4th breach 1123d are set, can also play the fixedly effect of feed probes 122 in the time of feed.
In the present embodiment, as Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c) and shown in Figure 3, the feed part that antenna need be assembled is made up of the feed dielectric body 121 of feed probes 122 and column type, feed probes 12221 and 121 combinations of feed dielectric body are fixed in and are-45 ° radiating doublet feed among power feed hole 1121 and the 3rd breach 1123c, and feed probes 122 and 121 combinations of feed dielectric body are fixed in and are+45 ° of radiating doublet feeds among power feed hole 1121 and the 4th breach 1123d.In the present embodiment, the minimum spacing of adjacent radiation oscillator is the width of separate slot 110, little each branch and feed through hole or balancing hole 1122 coaxial settings above it.
Particularly, as Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c) and shown in Figure 3, power feed hole 1121 is through Ba Lun portion 112, and balancing hole 1122 is blind hole, and the deep equality of balancing hole 1122 and separate slot 110.
Particularly, shown in Fig. 4 (a), Fig. 4 (b), reflection part 13 is tabular, reflection part 13 is provided with reflection cavity 131 with oscillator component 11 end in opposite directions, and reflection cavity 131 is cambered surface or conical surface-shaped, has increased reflective surface area, and the cambered surface of gradual change or taper seat can make wave beam even, good stability is compared the reflecting plate of conventional base station antenna unit, and this reflection part 13 has much smaller size.The central authorities of reflection cavity 131 are provided with installing hole 132, and the other end of Ba Lun portion 112 inserts installing hole 132 and can be fixedly connected on reflection part 13 by the mode of welding.Installing hole 132 can be through hole, and its shape can be complementary with the profile of Ba Lun portion 112.Installing hole 132 can be square, to mate with square Ba Lun portion 112.
In the present embodiment, shown in Fig. 4 (a), Fig. 4 (b), reflection cavity 131 can be regarded as and be cut out by a cuboid that a reverse taper forms.
Particularly, shown in Fig. 5 (a), Fig. 5 (b), last parasitic structure 141 be tabular and with oscillator component 11 spacing settings, last parasitic structure 141 by the insulation first support be connected in oscillator component 11 or reflection part 13 or installed surface.Installed surface can be the installed surface of antenna, for example ground, roof, antenna holder etc.
Alternatively, shown in Fig. 5 (a), Fig. 5 (b), last parasitic structure 141 rectangular sheets, and upward parasitic structure 141 can coaxially arrange with oscillator component 11.
Particularly, shown in Fig. 5 (a), Fig. 5 (b), following parasitic structure 142 in the form of a ring and between Department of Radiation 111 and reflecting part, following parasitic structure 142 is connected in oscillator component 11 or reflection part 13 or installed surface by second support of insulation.
Alternatively, shown in Fig. 5 (a), Fig. 5 (b), following parasitic structure 142 is the polygon ring-type, and goes up parasitic structure 141, following parasitic structure 142 and oscillator component 11 coaxial settings.
Alternatively, shown in Fig. 5 (a), Fig. 5 (b), in the present embodiment, the profile of reflection part 13 is square, and last parasitic structure 141 is square, and two diagonal of last parasitic structure 141 parallel with wherein two outer side edges of reflection part 13; Following parasitic structure 142 is the octagon ring-type, and the four edges that following parasitic structure 142 is separated by parallels with four outer side edges of reflection part 13.
Alternatively, shown in Fig. 5 (a), Fig. 5 (b), last parasitic structure 141 lateral dimensions are less than the sectional dimension of Department of Radiation 111; The interior ring size of following parasitic structure 142 is greater than the sectional dimension of Department of Radiation 111, and the outer ring size of following parasitic structure 142 is greater than the size of last parasitic structure 141; Reflection part 13 is provided with reflection cavity 131 with oscillator component 11 end in opposite directions, and the size of the great circle of the outer ring size of following parasitic structure 142 and reflection cavity 131 upper ends differs and can be no more than 10 millimeters.
In the present embodiment, oscillator component 11, feed probes 122, reflection part 13, last parasitic structure 141, following parasitic structure 142 can all adopt metal material to make, it is the dielectric material of 1.5-3.0 that the column type feed dielectric body 121 of parcel feed probes 122 can be selected dielectric constant for use, more preferably, can to select dielectric constant for use be the dielectric material of 2.1-2.6 to feed dielectric body 121.
Be appreciated that ground, size, shape and the structure of parts such as last parasitic structure 141, following parasitic structure 142 can be set according to the actual requirements.
Software emulation is the result show, the utility model antenna has been realized the miniaturization design of base station antenna unit under the condition that satisfies the antenna for base station performance index.The utility model antenna working band is 2.5GHz-2.69GHz, horizontal plane half power lobe width and vertical plane half power lobe width are in 65 ° ± 5 ° scopes, and ratio all satisfies the antenna for base station index request before and after antenna gain, standing-wave ratio, isolation, cross polarization ratio and the main poleization simultaneously.
Antenna provided by the utility model, its advantage can further specify by following emulation:
1, emulation content:
Utilize simulation software that voltage standing wave ratio, interport isolation, the far-field radiation directional diagram of above-described embodiment antenna are carried out simulation calculation.
2, simulation result:
Fig. 6 is the operating frequency-voltage standing wave ratio curve of antenna.Can find by Fig. 6, the utility model antenna is 2.5GHz-2.69GHz in voltage standing wave ratio less than the working band under 1.5 conditions, can cover whole frequency ranges of WIMAX (Worldwide Interoperability for Microwave Access, namely worldwide interoperability for microwave inserts).
Fig. 7 is the operating frequency-port coupling coefficient curve chart of antenna.Can find that by Fig. 7 the interport isolation of the utility model antenna in the whole working band of 2.5GHz-2.69GHz is better than the interport isolation index of ordinary base station antenna greater than 45dB.
Fig. 8 is the horizontal radiation pattern of the utility model antenna when-45 ° of oscillator single port feeds, comprise main poleization and cross polarization in the directional diagram, Fig. 8 (a), Fig. 8 (b), Fig. 8 (c) are respectively antenna at the directional diagram of 2.5GHz, 2.56GHz and three frequencies of 2.69Ghz.As can be seen from the figure directional diagram changes in the whole working band of 2.5GHz-2.69GHz gently, and the cross-polarization levels in the main lobe is lower, than higher, it can also be seen that simultaneously back lobe is mainly caused by cross polarization before and after the main poleization.
Fig. 9 (a), Fig. 9 (b), Fig. 9 (c) are the elevation radiation patytern of the utility model antenna when-45 ° of oscillator single port feeds, and the horizontal radiation pattern of comparison diagram 8 both directional diagram as can be seen differs very little.Directional diagram when only having provided-45 ° of oscillator list feedbacks in addition here, actual emulation+45 ° of oscillator list feedback directional diagrams and-45 ° of single feedback directional diagram basically identicals.
Figure 10 be the utility model antenna ± 45 ° oscillator the horizontal lobe width of the 3dB of each frequency, the vertical lobe width of 3dB, ± cross polarization in 30 ° of lobes than, module gain and main poleization before and after the index of ratio gather.As can be seen from the table, 3dB horizontal beam width and 3dB vertical beam width change mild, satisfy index request (2500MHz～2690MHz-65 ° ± 5 °), in addition, cross polarization than greater than 27dB, is also satisfied the index request of antenna for base station than greater than 17dB before and after the main poleization.As can be seen from the table, the utility model antenna has been realized the miniaturization of base station antenna unit under the condition that satisfies antenna for base station correlated performance parameter index.
The antenna that the utility model embodiment provides, the useful secondary radiation that its parasitic element 14 and oscillator component 11 cause makes antenna still can reach 65 ° ± 5 ° half-power beam width under the small-sized situation of reflection part 13, the while standing-wave ratio, bandwidth of operation, gain, interport isolation, ratio all reaches the antenna for base station index request before and after cross polarization and the main poleization, simultaneously oscillator component 11 integrated designs have guaranteed that also antenna has good consistency man-hour adding, have the remarkable advantage of miniaturization, and then can be used as array element and be applied in the design of high performance miniaturization antenna for base station.
Below only be preferred embodiment of the present utility model, not in order to limiting the utility model, all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace or improvement etc., all should be included within the protection range of the present utility model.
Claims (15)
1. an antenna oscillator comprises oscillator component, and described oscillator component comprises Department of Radiation and Ba Lun portion, and described Department of Radiation is one-body molded with Ba Lun portion or fixedly connected; It is characterized in that described antenna oscillator also comprises for the coupling of described oscillator component and produce the parasitic element of secondary radiation; Described parasitic element comprises parasitic structure and following parasitic structure, describedly goes up the top that parasitic structure is arranged at described oscillator component, described parasitic structure down in the form of a ring, described following parasitic structure is placed in described oscillator component periphery; Described upward parasitic structure in the form of sheets.
2. antenna oscillator as claimed in claim 1, it is characterized in that, described Department of Radiation integrally casting takes shape in an end of described Ba Lun portion, the other end of described Ba Lun portion fixedly is welded in or is fixedly connected on described reflection part by locking member, described Department of Radiation comprises a plurality of radiating doublets, and each described radiating doublet circumferentially is spaced and is connected in the described Ba Lun portion.
3. antenna oscillator as claimed in claim 2 is characterized in that, described oscillator component is ± 45 ° of dual polarization cross oscillators, and described radiating doublet is tabular or ring-type.
4. antenna oscillator as claimed in claim 3 is characterized in that, described radiating doublet is tabular, vertical plate portion that it comprises the transverse plate part and is connected in described transverse plate part.
5. antenna oscillator as claimed in claim 4 is characterized in that, described transverse plate partly is the isosceles trapezoid shape, and its short base integrally casting takes shape in described Ba Lun portion, and described vertical plate portion integrally casting takes shape in the long base of described transverse plate part.
6. as each described antenna oscillator in the claim 1 to 5, it is characterized in that the described parasitic structure that goes up is tabular, described parasitic structure down in the form of a ring.
7. an antenna comprises feeding pack and reflection part, it is characterized in that, comprises that also described oscillator component is connected in described reflection part as each described antenna oscillator in the claim 1 to 6, and described feeding pack is connected in described oscillator component.
8. antenna as claimed in claim 7 is characterized in that, described Ba Lun portion is provided with for the separate slot that described Ba Lun portion is divided into a plurality of branches.
9. antenna as claimed in claim 8, it is characterized in that, described radiating doublet is provided with four, described separate slot is provided with two and described Ba Lun portion is divided into four branches, two described separate slot square crossings arrange, four described branches are respectively first branch, second branch, the 3rd branch and the 4th branch, and wherein said first branch and described the 3rd branch diagonal angle arrange, and described second branch and described the 4th branch diagonal angle arrange.
10. antenna as claimed in claim 9 is characterized in that, is provided with power feed hole in described first branch and second branch, is provided with balancing hole in described the 3rd branch and the 4th branch; Described feeding pack comprises two feed bodies, and described feed body comprises the feed dielectric body and is connected in the feed probes of described feed dielectric body; Wherein the feed dielectric body of a described feed body is arranged in the power feed hole of described first branch, and described feed probes is connected in described the 3rd branch or is connected on the radiating doublet in the 3rd branch; The feed dielectric body of another described feed body is arranged in the power feed hole of described second branch, and described feed probes is connected in described the 4th branch or is connected on the radiating doublet in the 4th branch, and the feed probes of two described feed bodies is crisscross arranged.
11. as each described antenna in the claim 7 to 10, it is characterized in that, a described reflection part and described oscillator component end in opposite directions is provided with reflection cavity, described reflection cavity is cambered surface or conical surface-shaped, the central authorities of described reflection cavity are provided with installing hole, and the other end of described Ba Lun portion inserts described installing hole and is fixedly connected on described reflection part.
12. as each described antenna in the claim 7 to 10, it is characterized in that, described to go up parasitic structure rectangular tabular and arrange with described oscillator component spacing, and described first support of parasitic structure by insulation of going up is connected in described oscillator component or described reflection part or installed surface.
13. as each described antenna in the claim 7 to 10, it is characterized in that, described parasitic structure down is the polygon ring-type and between described Department of Radiation and described reflecting part, described parasitic structure down is connected in described oscillator component or described reflection part or installed surface by second support of insulation.
14. as each described antenna in the claim 7 to 10, it is characterized in that the profile of described reflection part is square, the described parasitic structure that goes up is square, described two diagonal going up parasitic structure parallel with wherein two outer side edges of described reflection part; Described parasitic structure down is the octagon ring-type, and the four edges that described parasitic structure down is separated by parallels with four outer side edges of described reflection part.
15. antenna as claimed in claim 14 is characterized in that, the described parasitic structure lateral dimension of going up is less than the sectional dimension of described Department of Radiation; The interior ring size of described parasitic structure down is greater than the sectional dimension of Department of Radiation, and a described reflection part and described oscillator component end in opposite directions is provided with reflection cavity.
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| CN 201320217089 CN203232955U (en) | 2013-04-25 | 2013-04-25 | Antenna oscillator and antenna with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320217089 CN203232955U (en) | 2013-04-25 | 2013-04-25 | Antenna oscillator and antenna with same |
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| CN203232955U true CN203232955U (en) | 2013-10-09 |
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