CN203386887U - Antenna oscillator and antenna equipped with same - Google Patents

Antenna oscillator and antenna equipped with same Download PDF

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Publication number
CN203386887U
CN203386887U CN201320217092.XU CN201320217092U CN203386887U CN 203386887 U CN203386887 U CN 203386887U CN 201320217092 U CN201320217092 U CN 201320217092U CN 203386887 U CN203386887 U CN 203386887U
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antenna
branch
oscillator
feed
radiation
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Chinese (zh)
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万方文
刘�英
易浩
王坤鹏
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

The utility model is applied to the field of antenna technology and provides an antenna oscillator and an antenna equipped with the same. The antenna oscillator includes an oscillator member which includes a radiation part and a balun part connected to the radiation part, and the antenna oscillator further includes a parasitic member which is coupled with the oscillator member and generates secondary radiation. The parasitic member includes an upper parasitic member and a lower parasitic member, the upper parasitic member is arranged above the oscillator member, and the lower parasitic member is ringlike and sleeved to the periphery of the oscillator member. The antenna includes a feeding member, a reflecting member and the antenna oscillator. According to the antenna oscillator and the antenna equipped with the same, the parasitic member which is coupled with the oscillator member and generates secondary radiation and a sharpening wave beam is disposed, the parasitic member and the oscillator member can cause beneficial secondary radiation, and the antenna oscillator and the antenna equipped with the same has an advantage of outstanding miniaturization.

Description

Antenna oscillator and there is the antenna of this antenna oscillator
Technical field
The utility model belongs to antenna technical field, relates in particular to a kind of antenna oscillator and has the antenna of this antenna oscillator.
Background technology
Mobile communication technology has brought information communication efficiently to the mankind.The increase of demand has simultaneously also promoted the flourish of mobile communication technology.
In prior art, antenna for base station, in order to reach the horizontal plane 3dB lobe width of 65 ° and suitable front and back than index, often obtains by the size that increases reflecting plate, and this will cause the antenna overall volume larger, when causing visual pollution, also can increase manufacturing cost and construction cost.Conventional antenna for base station is comprised of numerous parts usually, and especially, for the antenna that adopts the Air Coupling feed, the design of non-integral is difficult to guarantee consistency and the expected performance of antenna.Existing antenna for base station also exists impedance bandwidth and the narrower problem of directional diagram bandwidth, and broad-band antenna is still improving capacity of communication system obvious superiority is all arranged from conserve space.
To sum up, in prior art, there are the problems such as size is large, installation is inconvenient in the antenna in base station, and antenna for base station is as the terminal of system, and the realization of its miniaturization and broadband character is to the vital effect of having further developed of mobile communication system.
The utility model content
The antenna oscillator that the utility model provides and have the antenna of this antenna oscillator, its size is little, easy for installation.
On the one hand, as the first performance, the utility model provides a kind of antenna oscillator, comprise oscillator component, described oscillator component comprises Department of Radiation and is connected in the Ba Lun section of described Department of Radiation, described antenna oscillator also comprises for being coupled with described oscillator component and producing the parasitic element of secondary radiation, described parasitic element comprises parasitic structure and lower parasitic structure, described upper parasitic structure is arranged at the top of described oscillator component, in the form of a ring, described lower parasitic structure is placed in described oscillator component periphery to described lower parasitic structure.
In conjunction with the first performance, as the second performance, described Department of Radiation one is connected in an end of described Ba Lun section, the other end of described Ba Lun section is connected in described reflection part, described Department of Radiation comprises a plurality of radiating doublets, and each described radiating doublet circumferentially is spaced and is connected in described Ba Lun section.
In conjunction with the second performance, as the third performance, described oscillator component is ± 45 ° of dual polarization cross oscillators, and described radiating doublet in the form of sheets or ring-type.
In conjunction with the second performance, as the 4th kind of performance, the described radiating doublet ring-type that is square.
In conjunction with any performance in first to fourth, as the 5th kind of performance, described upper parasitic structure is tabular, and described lower parasitic structure is polygon ring-type or circular.
Second aspect, as the first performance, the utility model provides a kind of antenna, comprise feeding pack and reflection part, also comprise above-mentioned antenna oscillator, described feeding pack is connected in described oscillator component, and described oscillator component is connected in described reflection part.
In conjunction with the first performance in second aspect, as the second performance in second aspect, the upper end of described Ba Lun section is provided with for described Ba Lun section being divided into to the separate slot of a plurality of branches.
In conjunction with the second performance in second aspect, as the third performance in second aspect, described radiating doublet is provided with four, described separate slot is provided with two and described Ba Lun section is divided into to four branches, two described separate slot square crossings arrange, four described branches are respectively the first branch, the second branch, the 3rd branch and the 4th branch, and wherein said the first branch and described the 3rd branch diagonal angle arrange, and described the second branch and described the 4th branch diagonal angle arrange.
In conjunction with the third performance in second aspect, as the 4th kind of performance in second aspect, described radiating doublet is provided with four, and the equal one in one of them corner of four described radiating doublets is connected in each described branch, and four described radiating doublets are arranged in square structure.
In conjunction with the third performance in second aspect, as the 5th kind of performance in second aspect, in described the first branch and the second branch, be provided with power feed hole, 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 the 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 the 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 five in second aspect, as the 6th kind of performance in second aspect, described reflection part comprises the side plate of the described base plate surrounding of being connected in of square base plate.
In conjunction with any performance in first to five in second aspect, as the 7th kind of performance in second aspect, described upper parasitic structure be square sheet and with the setting of described oscillator component spacing, described upper parasitic structure by the insulation the first support be connected in described oscillator component or described reflection part or installed surface.
In conjunction with any performance in first to five in second aspect, as the 8th kind of performance in second aspect, be square ring-type and between described Department of Radiation and described reflecting part of described lower parasitic structure, described lower parasitic structure is connected in described oscillator component or described reflection part or installed surface by the second support of insulation.
The antenna oscillator that the utility model provides and there is the antenna of this antenna oscillator, it is by being provided for being coupled with described oscillator component and producing the parasitic element of secondary radiation, parasitic element and oscillator component can cause useful secondary radiation, useful secondary radiation makes antenna in the situation that the small-sized half-power beam width that still can reach setting of reflection part, remarkable advantage with miniaturization, can meet next-generation mobile communications base station antenna wideband and high performance demand after the group battle array.
The accompanying drawing explanation
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 is the schematic perspective 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 of 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 horizontal radiation pattern (left side) and the elevation radiation patytern (right side) of the utility model antenna 1.71GHz Frequency point when-45 ° of oscillator single port feeds, comprises main pole and cross polarization in figure;
Fig. 8 (b) is horizontal radiation pattern (left side) and the elevation radiation patytern (right side) of the utility model antenna 1.79GHz Frequency point when-45 ° of oscillator single port feeds, comprises main pole and cross polarization in figure;
Fig. 8 (c) is horizontal radiation pattern (left side) and the elevation radiation patytern (right side) of the utility model antenna 1.88GHz Frequency point when-45 ° of oscillator single port feeds, comprises main pole and cross polarization in figure;
Fig. 8 (d) is horizontal radiation pattern (left side) and the elevation radiation patytern (right side) of the utility model antenna 1.92GHz Frequency point when-45 ° of oscillator single port feeds, comprises main pole and cross polarization in figure;
Fig. 8 (e) is horizontal radiation pattern (left side) and the elevation radiation patytern (right side) of the utility model antenna 2.04GHz Frequency point when-45 ° of oscillator single port feeds, comprises main pole and cross polarization in figure;
Fig. 8 (f) is horizontal radiation pattern (left side) and the elevation radiation patytern (right side) of the utility model antenna 2.17GHz Frequency point when-45 ° of oscillator single port feeds, comprises main pole and cross polarization in figure;
Fig. 8 (g) is horizontal radiation pattern (left side) and the elevation radiation patytern (right side) of the utility model antenna 2.49GHz Frequency point when-45 ° of oscillator single port feeds, comprises main pole and cross polarization in figure;
Fig. 8 (h) is horizontal radiation pattern (left side) and the elevation radiation patytern (right side) of the utility model antenna 2.58GHz Frequency point when-45 ° of oscillator single port feeds, comprises main pole and cross polarization in figure;
Fig. 8 (i) is horizontal radiation pattern (left side) and the elevation radiation patytern (right side) of the utility model antenna 2.69GHz Frequency point when-45 ° of oscillator single port feeds, comprises main pole and cross polarization in figure;
Fig. 9 (a) is that the index of the utility model antenna ± 45 ° oscillator ratio before and after the 3dB of each Frequency point horizontal beam width, 3dB vertical beam width, cross polarization ratio, module gain and main poleization gathers;
Fig. 9 (b) is that the index of the utility model antenna ± 45 ° oscillator ratio before and after the 3dB of each Frequency point horizontal beam width, 3dB vertical beam width, cross polarization ratio, module gain and main poleization gathers;
Fig. 9 (c) is that the index of the utility model antenna ± 45 ° oscillator ratio before and after the 3dB of each Frequency point horizontal beam width, 3dB vertical beam width, cross polarization ratio, module gain and main poleization gathers.
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 is only in order to explain the utility model, and be not used in restriction the utility model.
A kind of antenna oscillator that the utility model embodiment provides, can be used as array element and be applied on mobile communication base station, for example the minimized wide-band base station.
As shown in Fig. 1 (a), Fig. 1 (b), Fig. 1 (c), above-mentioned antenna oscillator comprises oscillator component 21 and for being coupled with oscillator component 21 and producing the parasitic element 24 of secondary radiation.Oscillator component 21 can be connected in feeding pack 22 and the reflection part 23 in antenna, and particularly, feeding pack 22 is connected in oscillator component 21, and oscillator component 21 is connected in reflection part 23.
As Fig. 1 (a), Fig. 1 (b), shown in Fig. 1 (c), parasitic element 24 is by being coupled with oscillator component 21 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 23 of profile maximum in 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 24, make the antenna that the utility model embodiment provides can realize sharing of a plurality of networks, can be also high performance IMT-Advanced(International Mobile Telecommunications-Advanced, IMT-Advanced) the required active integrated antenna of system provides design.
Particularly, as shown in Fig. 1 (a), Fig. 1 (b), Fig. 1 (c), parasitic element 24 comprises parasitic structure 241 and lower parasitic structure 242, and upper parasitic structure 241 is arranged at the top of oscillator component 21 and apart arranges with oscillator component 21, to form useful secondary radiation.Lower parasitic structure 242 in the form of a ring, lower parasitic structure 242 be placed in oscillator component 21 peripheral and with oscillator component 21 spacing settings, to form useful secondary radiation.Upper parasitic structure 241 and lower parasitic structure 242 all separates with oscillator component 21, go up parasitic structure 241 and lower parasitic structure 242 with oscillator component 21 all without the relation be electrically connected to, with formation, be coupled.Upper parasitic structure 241 and lower parasitic structure 242 can resonance at low frequency end, expanded bandwidth to low frequency, dricetor element can resonance at front end, to High-Frequency Expanding bandwidth, aggregate performance is the impedance bandwidth that has increased oscillator.Conventional oscillator need to guarantee gain and suitable beamwidth at a larger reflecting plate of relative size; And antenna provided by the utility model, due to the existence of parasitic element 24, can guarantee higher gain and suitable beamwidth under the reflecting plate condition less in relative size.This is due to oscillator component 21(dricetor element), the secondary radiation of parasitic element 24 and the primary radiation of oscillator superpose, thereby obtain the gain higher than independent oscillator and narrower wave beam on principal direction.
Particularly, as shown in Fig. 1 (a), Fig. 1 (b), Fig. 1 (c), oscillator component 21 comprises Department of Radiation 211 and Ba Lun section 212, and Ba Lun section 212 can be used for carrying out balanced feeding and supports Department of Radiation 211.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 by its direct connection, 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 there is no electric current), so, will affect 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 211 one are connected in an end of Ba Lun section 212, and the other end of Ba Lun section 212 is connected in reflection part 23.But antenna element integrally casting or all-in-one machine-shaping, it can effectively improve the consistency of antenna element, and can increase interport isolation and cross polarization ratio, can also shorten in addition the manufacturing cycle and reduce manufacturing cost.
Particularly, Department of Radiation 211 comprises a plurality of radiating doublets, the radiating doublet suitable shapes such as ring-type that can be square.
Particularly, described upper parasitic structure 241 can be the tabular suitable shape that waits, the curved or corrugated sheet in rounded sheet, the cross section of the sheet be square such as profile, profile etc.Described lower parasitic structure 242 can be polygon ring-type or the suitable shape such as circular.
The utility model embodiment also provides a kind of antenna, comprises above-mentioned antenna oscillator and feeding pack 22 and reflection part 23, and particularly, feeding pack 22 is connected in oscillator component 21, and oscillator component 21 is connected in reflection part 23.
Particularly, as shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c), in Ba Lun section 212, be provided with for Ba Lun section 212 being divided into to the separate slot 2120 of a plurality of branches.In the present embodiment, radiating doublet is provided with four, is respectively 211a, 211b, 211c, 211d; Each radiating doublet 211a, 211b, 211c, 211d circumferentially are spaced and are connected in the branch of Ba Lun section 212.Separate slot 2120 degree of depth are to extend to apart from the bottom of Ba Lun section 212 1 to 5 millimeter by irradiator surface to locate or be set to other degree of depth.
Particularly, as shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c), separate slot 2120 is provided with two and Ba Lun section 212 is divided into to four branches.The cross section of Ba Lun section 212 is square, two separate slot 2120 square crossings arrange to wait decibar human relations section 212, four branches are respectively the first 212a of branch, the second 212b of branch, the 3rd 212c of branch and the 4th 212d of branch, wherein the first 212a of branch and the 3rd 212c of branch diagonal angle arrange, and the second 212b of branch and the 4th 212d of branch diagonal angle arrange.
Particularly, as shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c), all cut and be provided with triangular groove 2124 at the place, diagonal angle of the place, diagonal angle of the first 212a of branch and the 3rd 212c of branch, the 3rd 212c of branch and the 4th 212d of branch, and triangular groove 2124 is dark with separate slot 2120 grades.Like this, can improve interport isolation and increase the cross polarization ratio, improve the performance of antenna under the prerequisite of antenna miniaturization.
Particularly, as shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c), radiating doublet can be the polygon ring-type, and in the present embodiment, the radiating doublet ring-type that is square, can effectively extend current path, is beneficial to the miniaturization that further realizes antenna structure.The equal one in one of them corner of four radiating doublets is connected in each branch, and four radiating doublets are arranged in square structure, and its compact conformation is beneficial to and further reduces the shared size of antenna.
Radiating doublet adopts the Q-RING structure can extend current path, and the Q-RING of four compact arrangement has obviously reduced the shared area of radiating doublet, under the condition of guaranteed performance, has realized the Miniaturization Design of Department of Radiation 211.Four arms of adhere to separately ± 45 ° of dual polarization vibrators of the radiating doublet of four square rings, the radiating doublet of four square rings is arranged as a large square.
Particularly, as shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c) and Fig. 3, feeding pack 22 comprises two feed bodies, and the feed body comprises feed dielectric body 221 and is connected in the feed probes 222 of feed dielectric body 221; Be provided with power feed hole 2121 on the first 212a of branch and the second 212b of branch, power feed hole 2121, for filling feed probes 222 and feed dielectric body 221, is respectively ± 45 ° of oscillator feeds.Be provided with balancing hole 2122 on the 3rd 212c of branch and the 4th 212d of branch; Wherein the feed dielectric body 221 of a feed body is arranged in the power feed hole 2121 of the first 212a of branch, and feed probes 222 can be connected in the 3rd 212c of branch or be connected on the radiating doublet on the 3rd 212c of branch by modes such as welding; The feed dielectric body 221 of another feed body is arranged in the power feed hole 2121 of the second 212b of branch, feed probes 222 can be connected in the 4th 212d of branch or be connected on the radiating doublet on the 4th 212d of branch by modes such as welding, and the feed probes 222 of two feed bodies is crisscross arranged.
As shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c) and Fig. 3, power feed hole 2121 and balancing hole 2122 are can be all rounded and all be arranged at the axis place of each corresponding branch, and correspondingly, it is cylindric that feed dielectric body 221 can be.In the present embodiment, the width that the minimum spacing of adjacent radiation oscillator is separate slot 2120, each branch and feed through hole or balancing hole 2122 above it coaxially arrange.
Particularly, as Fig. 2 (a), Fig. 2 (b), shown in Fig. 2 (c) and Fig. 3, the upper end of the upper end of the first 212a of branch and the 3rd 212c of branch offers respectively for holding wherein the first breach 2123a and the 3rd breach 2123c of a feed probes 222, the upper end of the upper end of the second 212b of branch and the 4th 212d of branch offers respectively the second breach 2123b and the 4th breach 2123d for holding another feed probes 222, and the second breach 2123b and the 4th breach 2123d are deeper than or are shallower than the first breach 2123a and the 3rd breach 2123c, like this, two feed bodies can shift to install up and down, be independent of each other, Antenna reliability is good.By the first breach 2123a and the 3rd breach 2123c, the second breach 2123b and the 4th breach 2123d are set, can also play the fixedly effect of feed probes 222 in the time of feed.
In the present embodiment, as shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c) and Fig. 3, the feed part that antenna need to be assembled is comprised of the feed dielectric body 221 of feed probes 222 and column type, it is the radiating doublet feed of-45 ° that feed probes 22221 and 22123 combinations of feed dielectric body are fixed in power feed hole 2121 and the 3rd breach 2123c, and it is+45 ° of radiating doublet feeds that feed probes 222 and 221 combinations of feed dielectric body are fixed in power feed hole 2121 and the 4th breach 2123d.
Particularly, as shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c) and Fig. 3, power feed hole 2121 is through Ba Lun section 212, and balancing hole 2122 is blind hole, and the deep equality of balancing hole 2122 and separate slot 2120.
Particularly, as shown in Figure 4, reflection part 23 comprises the side plate 232 that is connected in base plate 231 surroundings of square base plate 231.Base plate 231 is the quarter-wave of antenna frequencies apart from the distance at Department of Radiation 211 center.
Particularly, as shown in Figure 4, the central authorities of base plate 231 are provided with installing hole 233, and the bottom of antenna element is inserted installing hole 233 and is fixedly connected on base plate 231 by modes such as welding, installing hole 233 can be through hole, and its shape can be complementary with the profile of Ba Lun section 212.Installing hole 233 can be square, with Ba Lun section 212 couplings with square.
Particularly, as shown in Fig. 1 (b), Fig. 1 (c) and Fig. 5 (a), Fig. 5 (b), upper parasitic structure 241 in the form of sheets and with oscillator component 21 spacing settings, upper parasitic structure 241 is connected in oscillator component 21 or reflection part 23 or installed surface by the first support of insulation, installed surface can be the installed surface of antenna, such as ground, roof, antenna holder etc.
In the present embodiment, as shown in Fig. 1 (b), Fig. 1 (c) and Fig. 5 (a), Fig. 5 (b), the rectangular sheet of upper parasitic structure 241, and upper parasitic structure 241 coaxially arranges with oscillator component 21.
Particularly, as shown in Fig. 1 (b), Fig. 1 (c) and Fig. 5 (a), Fig. 5 (b), lower parasitic structure 242 in the form of a ring and, between Department of Radiation 211 and reflecting part, lower parasitic structure 242 is connected in oscillator component 21 or reflection part 23 or installed surface by the second support of insulation.
Particularly, as shown in Fig. 1 (b), Fig. 1 (c) and Fig. 5 (a), Fig. 5 (b), lower parasitic structure 242 is polygon ring-type or circular, and upper parasitic structure 241, lower parasitic structure 242 and oscillator component 21 coaxially arrange.In the present embodiment, lower parasitic structure 242 is quadrangular ring-shaped.
In the present embodiment, oscillator component 21, feed probes 222, reflection part 23, upper parasitic structure 241, lower parasitic structure 242 can all adopt metal material to make, the column type feed dielectric body 221 of parcel feed probes 222 can be selected the dielectric material that dielectric constant is 1.5-3.0, more preferably, feed dielectric body 221 can be selected the dielectric material that dielectric constant is 2.1-2.6.
Antenna provided by the utility model, it uses integrated design technology to realize the integrated casting of ± 45 ° of dual polarization vibrator Departments of Radiation 211 and Ba Lun section 212, has guaranteed the consistency of antenna, can increase interport isolation and cross polarization ratio simultaneously.Radiating doublet adopts Q-RING structure to prolong current path, thereby realizes the Miniaturization Design of oscillator.In order to reach best pattern characteristics and stationary wave characteristic, reflecting plate approaches the quarter-wave at centre frequency place apart from the radiant body spacing, and has increased the perpendicular side plate 232 of certain altitude, forms reflection chamber.Compare problems of too in order to make up lobe width and the front and back that the reflecting plate size reduction brings, antenna provided by the utility model, it controls wave beam and front and back ratio in radiant body upper and lower increase square plate and two parasitic structure of Q-RING, and the secondary radiation that parasitic structure causes has in addition also played the effect that increases impedance bandwidth.
Understandably, size, shape and the structure of the parts such as upper parasitic structure 241, lower parasitic structure 242 can be set according to the actual requirements.
The calculated results shows, miniaturization Bipolarization antenna for base station provided by the utility model unit has broadband character, meet simultaneously antenna for base station about interport isolation, cross polarization than and main poleization before and after the index of ratio.The utility model antenna can be realized the working band index of 1.71GHz~2.69GHz, and the working band of actual emulation is greater than desired value.
Antenna provided by the utility model, its assembling process is as follows: after utilizing integrated foundry engieering to process oscillator component 21, reflection part 23 and upper parasitic structure 241, lower parasitic structure 242, in installing hole 233 on the base plate 231 of the lower end insertion reflection part 23 of the Ba Lun section 212 of oscillator component 21, alignment and welded together.Insert successively feed probes 222 and the feed dielectric body 221 of-45 ° of radiating doublets and+45 ° of radiating doublets from top and fix feed probes 222.Upper parasitic structure 241 is by support construction supports on radiating doublet, and lower parasitic structure 242 is fixed on radiating doublet by supporting construction equally.On feed probes 222 in the last power feed hole 2121 that only the feeder cable inner core need be welded on to reflection part 23 bottoms, so outer core can be welded on the metal around power feed hole 2121, antenna can be realized normal operation.
The utility model provides antenna, and its advantage can further illustrate by following simulation result:
1, emulation content:
Utilize simulation software to carry out simulation calculation to voltage standing wave ratio, interport isolation, the far-field radiation directional diagram of above-described embodiment antenna.
2, simulation result:
The operating frequency that Fig. 6 is antenna-voltage standing wave ratio curve.By Fig. 6, can find, the working band that the utility model antenna is less than under 1.5 conditions in voltage standing wave ratio is greater than 1.71GHz-2.69GHz, and these are working frequency range that mobile communication needs, and this explanation the utility model antenna has good impedance bandwidth characteristic.
The operating frequency that Fig. 7 is antenna-port coupling coefficient curve chart.By Fig. 7, can find, the interport isolation of the utility model antenna in the whole working band of 1.71GHz-2.69GHz is greater than 43dB, is better than the interport isolation index of ordinary base station antenna.
Fig. 8 is horizontal radiation pattern (left side) and the elevation radiation patytern (right side) of the utility model antenna when-45 ° of oscillator single port feeds, comprises main pole and cross polarization in directional diagram.As can be seen from the figure directional diagram changes gently in the whole working band of 1.71GHz-2.69GHz, and the cross-polarization levels in main lobe is lower, higher before and after main poleization, it can also be seen that back lobe is mainly to be caused by cross polarization simultaneously.
Figure 10 (a), Figure 10 (b), Figure 10 (c) be the utility model antenna ± 45 ° oscillator the horizontal lobe width of the 3dB of each frequency, 3dB vertical lobe width, ± cross polarization ratio, module gain and main poleization in 30 ° of lobes 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, substantially meet (1710MHz~1880MHz-75 ° ± 5 ° of index requests, 1920MHz~2170MHz-70 ° ± 5 °, 2490MHz~2690MHz-65 ° ± 5 °), illustrate that the utility model antenna has good directional diagram bandwidth equally.The cross polarization ratio is greater than 19dB, before and after main poleization, than being greater than 30dB, meets the index request of antenna for base station.
The minimized wide-band Bipolarization antenna for base station that the utility model provides, mainly solve existing antenna for base station electricity size greatly and the narrow problem of bandwidth of operation.Its oscillator component 21 is processed by integrated foundry engieering, has increased parasitic element 24 when reducing the reflection chamber size, and parasitic element 24, Department of Radiation 211 centers are on same axis.The secondary radiation that parasitic element 24 causes can play the purpose that reduces lobe width and increase impedance bandwidth, and in actual processing, the special fixture of design is fixed in upper parasitic structure 241 and lower parasitic structure 242 on reflection part 23.Medium in the feed through hole, the antenna remainder can all consist of metal material, the application of integrated foundry engieering has guaranteed that antenna has good consistency, antenna has miniaturization and broadband character, after the group battle array, can meet next-generation mobile communications base station antenna wideband and high performance demand.
These are only preferred embodiment of the present utility model, not in order to limit the utility model, all any modifications of doing within spirit of the present utility model and principle, be equal to and replace or improvement etc., within all should being included in protection range of the present utility model.

Claims (13)

1. an antenna oscillator, comprise oscillator component, described oscillator component comprises Department of Radiation and is connected in the Ba Lun section of described Department of Radiation, it is characterized in that, described antenna oscillator also comprises that described parasitic element comprises parasitic structure and lower parasitic structure for being coupled with described oscillator component and producing the parasitic element of secondary radiation, and described upper parasitic structure is arranged at the top of described oscillator component, in the form of a ring, described lower parasitic structure is placed in described oscillator component periphery to described lower parasitic structure.
2. antenna oscillator as claimed in claim 1, is characterized in that, described Department of Radiation one is connected in an end of described Ba Lun section, and described Department of Radiation comprises a plurality of radiating doublets, and each described radiating doublet circumferentially is spaced and is connected in described Ba Lun section.
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 in the form of sheets or ring-type.
4. antenna oscillator as claimed in claim 2, is characterized in that, the described radiating doublet ring-type that is square.
5. antenna oscillator as described as any one in claim 1 to 4, is characterized in that, described upper parasitic structure is tabular, and described lower parasitic structure is polygon ring-type or circular.
6. an antenna, comprise feeding pack and reflection part, it is characterized in that, also comprises antenna oscillator as described as any one in claim 1 to 5, and described feeding pack is connected in described oscillator component, and described oscillator component is connected in described reflection part.
7. antenna as claimed in claim 6, is characterized in that, the upper end of described Ba Lun section is provided with for described Ba Lun section being divided into to the separate slot of a plurality of branches.
8. antenna as claimed in claim 7, it is characterized in that, described radiating doublet is provided with four, described separate slot is provided with two and described Ba Lun section is divided into to four branches, two described separate slot square crossings arrange, four described branches are respectively the first branch, the second branch, the 3rd branch and the 4th branch, and wherein said the first branch and described the 3rd branch diagonal angle arrange, and described the second branch and described the 4th branch diagonal angle arrange.
9. antenna as claimed in claim 8, is characterized in that, described radiating doublet is provided with four, and the equal one in one of them corner of four described radiating doublets is connected in each described branch, and four described radiating doublets are arranged in square structure.
10. antenna as claimed in claim 8, is characterized in that, in described the first branch and the second branch, is provided with power feed hole, in described the 3rd branch and the 4th branch, is provided with balancing hole; 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 the 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 the 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. antenna as described as any one in claim 6 to 10 is characterized in that described reflection part comprises the side plate of the described base plate surrounding of being connected in of square base plate.
12. antenna as described as any one in claim 6 to 10, it is characterized in that, described upper parasitic structure be square sheet and with the setting of described oscillator component spacing, described upper parasitic structure by the insulation the first support be connected in described oscillator component or described reflection part or installed surface.
13. antenna as described as any one in claim 6 to 10, it is characterized in that, be square ring-type and between described Department of Radiation and described reflecting part of described lower parasitic structure, described lower parasitic structure is connected in described oscillator component or described reflection part or installed surface by the second support of insulation.
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