CN103066376B - A kind of broadband high-isolation dual polarization antenna and radiating element thereof - Google Patents
A kind of broadband high-isolation dual polarization antenna and radiating element thereof Download PDFInfo
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- CN103066376B CN103066376B CN201210559968.9A CN201210559968A CN103066376B CN 103066376 B CN103066376 B CN 103066376B CN 201210559968 A CN201210559968 A CN 201210559968A CN 103066376 B CN103066376 B CN 103066376B
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Abstract
The invention discloses a kind of broadband high-isolation dual polarization antenna and radiating element thereof, radiating element includes reflecting plate, the first fed element, the second fed element, the first radiant body, the second radiant body and four support members, the first radiant body and the second radiant body two radiant body compositions by diagonal angle；Four radiant bodies are separately fixed on four support members, four support members are fixed on reflecting plate, the top of the first fed element and the second fed element is mutually orthogonal, and there is a difference in height, first fed element is the feed structure of the first radiant body, second fed element is the feed structure of the second radiant body, one cross gap of four radiant body intermediate formation；Being provided with length more than radiant body and towards the rectangle minor matters in radiant body outer ledge direction on each radiation dignity centre position, each radiant body outer ledge is provided with minor matters。The dual polarization antenna radiation unit of the present invention and the aerial array of composition thereof have the advantage such as isolation height, strong, the bandwidth of radiation characteristic。
Description
Technical field
The present invention relates to a kind of dual polarized antenna, particularly to a kind of broadband high-isolation dual polarization antenna and radiating element thereof。
Background technology
In recent years, fast development along with mobile communication, communication system will necessarily develop into 4G communication system from 2G, 3G communication system, owing to wideband base station antenna is at the importance of communication system, so designing the study hotspot that the wideband base station antenna meeting LTE communication system becomes nearest。Both at home and abroad the research of wideband base station antenna is concentrated mainly on the aspects such as the performance of antenna for base station, cost, assembling at present。
In order to improve the capacity of communication system, it is generally adopted polarization diversity technique, improves the work efficiency of antenna by designing wide band dual polarized antenna。Design one of wide band dual polarized antenna difficult point to be in that: control influencing each other between two different poliarizing antennas when making each poliarizing antenna meet operating characteristic, the indexs such as the isolation of antenna and cross polarization are just proposed requirement by this。Improve the isolation of dual polarized antenna mainly by feeding classification reasonable in design, reduce the electric current impact between two feed port, the isolation that two-port electric current affects more little then antenna is more big, generally makes two feeder lines improve isolation by mutually orthogonal in engineering design。Designing another difficult point of wide band dual polarized antenna is: not only requires that the impedance matching bandwidth of antenna reaches the requirement of broadband (such as 1.71-2.69GHz), but also requires that the radiation characteristic of antenna also meets requirement in this broad frequency range。
The electrical length of different frequency can change along with the change of frequency, and in a very wide frequency band range, the change of electrical length can be very big, and the physical size of the last design of antenna is constant。So it is very challenging to go to design the antenna meeting broadband operation by a constant physical size length。
Summary of the invention
It is an object of the invention to the shortcoming overcoming prior art with not enough, it is provided that a kind of radiation characteristic is strong, isolation is high and the dual polarization antenna radiation unit of bandwidth。
Another object of the present invention is to utilize above-mentioned dual polarization antenna radiation unit to obtain a kind of broadband high-isolation dual polarization antenna。
First purpose of the present invention is achieved through the following technical solutions: a kind of broadband high-isolation dual polarization antenna radiating element, form by two radiant bodies at diagonal angle including reflecting plate, the first fed element, the second fed element, the first radiant body, the second radiant body and four support members, described first radiant body and the second radiant body；Described four radiant bodies are separately fixed on four support members, described four support members are fixed on reflecting plate, the top of described first fed element and the second fed element is mutually orthogonal, and there is a difference in height, described first fed element is the feed structure of the first radiant body, second fed element is the feed structure of the second radiant body, described one cross gap of four radiant body intermediate formation；Being provided with length more than radiant body and towards the rectangle minor matters in radiant body outer ledge direction on described each radiation dignity centre position, described each radiant body outer ledge is provided with minor matters。
Preferably, the length of described rectangle minor matters is bent downwardly beyond the sections transverse of radiant body；Rectangle minor matters in described four radiation dignity are mutually orthogonal；The structure of described four radiant bodies, form and dimension are all identical。
Preferably, the minor matters of described radiant body outer ledge are arc, and described four radiant bodies constitute circular configuration。
Preferably, the minor matters of described radiant body outer ledge are rectangle, and described four radiant bodies constitute square structure。
Preferably, described first fed element and the second fed element are the metal fed element of " Γ " type。
Further, described four support members are that metal cylinder is emptied in centre；
Described four support members respectively the first support member, the second support member, the 3rd support member and the 4th support member, described four support members are distributed on foursquare four angles, wherein the position of the first support member and the 3rd support member is relative, and the position of the second support member and the 4th support member is relative；
Described first fed element top is fixing with the 3rd support member after the first support member to be connected, and described second fed element top is fixing with the 4th support member after the second support member to be connected；
Bottom described first fed element and the second fed element, middle probe with two SMA union joints is connected respectively, and the outer conductor of two SMA is connected with reflecting plate。
Further, described four support member tops are jagged, described first fed element top is connected on the gap position of the 3rd support member by the mode welded after the first support member, and described second fed element top is connected on the gap position of the 4th support member by the mode welded after the second support member。
Preferably, described four support members are fixed on reflecting plate independently of one another by the mode welded。
First purpose of the present invention is achieved through the following technical solutions: a kind of broadband high-isolation dual polarization antenna, includes at least 2 dual polarization antenna radiation units, adopts power division network to combine feed to form aerial array between multiple dual-polarization radiating units。
Preferably, described reflecting plate edge is provided with internal layer flange and outer layer flange。
The present invention has such advantages as relative to prior art and effect:
(1) the radiation dignity of the dual polarization antenna radiation unit of the present invention is provided with rectangle minor matters, at radiant section, owing to electric current is mainly distributed on the radiant body edge surface on intermediate gap both sides, the electric current being distributed in the rectangle minor matters of radiation dignity and the minor matters of radiant body outer ledge is little, and therefore the minor matters of the rectangle minor matters in radiation dignity and radiant body outer ledge are only small on the impact of radiant body radiation characteristic。Therefore the radiance of antenna can well just be regulated by parameters such as the length in cross gap or width so that it is reach required radiation index。
(2) there are two resonance points in dual polarization antenna radiation unit of the present invention within the scope of the working band of 1.71-2.69GH, first resonance point is low-frequency resonant point, refer to the resonance point that the intrinsic operating frequency of each dual polarization antenna radiation unit oneself is corresponding, it is relevant with the electrical length of poliarizing antenna, mainly determined by the length dimension of antenna itself, but the rectangle minor matters of the arc minor matters with radiation dignity centre position by increasing radiant body outer ledge have the effect increasing antenna electrical length, thus changing first resonance point of this poliarizing antenna；Second resonance point is high-frequency resonant point, it is that the inductance by radiating element every pair poliarizing antenna and inductance capacitance combine the resonant frequency obtained, the minor matters radiating the rectangle minor matters in dignity and radiant body outer ledge act as the effect of inductance and electric capacity, and the minor matters therefore increased on radiant body make the present invention there is second resonance point；Suitably regulate the two resonant frequency and just can be readily available required impedance matching bandwidth。Minor matters owing to radiating rectangle minor matters in dignity and radiant body outer ledge are very little on the impact of radiation characteristic again, the minor matters therefore increased on radiant body on the radiation characteristic of dual polarized antenna of the present invention almost without impact。
(3) the first fed element in dual polarization antenna radiation unit of the present invention and the second fed element are mutually orthogonal, and there is a difference in height between them, can well improving dual polarized antenna isolation by regulating difference in height, the dual polarized antenna isolation of the present invention can reach more than 40dB within the scope of the working band of 1.71-2.69GH。
(5) reflecting plate of dual polarized antenna of the present invention is additionally provided with internal layer flange and outer layer flange, antenna-reflected plate also exists CURRENT DISTRIBUTION, the distribution of electric current on reflecting plate and the flow direction of electric current can be changed by increasing flange in reflection, can be good at improving its cross-polarized index for increasing flange aerial array。The radiation characteristic of antenna can be optimized further by adjustment internal layer flange and the height of outer layer flange and the distance between them。
(6) the rectangle minor matters length on the radiating element radiant body of dual polarized antenna of the present invention can bend vertically downward beyond the part of radiant body both sides of the edge so that reduce the size of antenna when antenna performance is constant。Additionally the rectangle minor matters on radiant body can be the rectangle combination two one-tenth that a few byte wide is different, and the impedance operator that the structure of different in width has is different, and multiple width can combine to better regulate the impedance matching of antenna。
Accompanying drawing explanation
Fig. 1 is the supporting piece structure of dual polarization antenna radiation unit of the present invention。
Fig. 2 is the structure of dual polarization antenna radiation unit radiant body of the present invention。
Fig. 3 is the structure of two fed element of dual polarization antenna radiation unit of the present invention。
Fig. 4 is the side view of dual polarization antenna radiation unit of the present invention。
Fig. 5 is dual-polarized antenna array top view of the present invention。
Fig. 6 is dual-polarized antenna array side view of the present invention。
Fig. 7 is the standing-wave ratio curve chart of dual polarized antenna of the present invention。
Fig. 8 is the isolation curve chart of dual polarized antenna of the present invention。
Fig. 9 is the gain diagram of dual polarized antenna of the present invention。
Figure 10 a, 10b and 10c are dual polarized antenna port one of the present invention respectively is the main polarization and cross-polarized directional diagram of horizontal plane when 1.7GHz, 2.2GHz and 2.7GHz in frequency。
Figure 11 a, 11b and 11c are dual polarized antenna ports two of the present invention is the main polarization and cross-polarized directional diagram of horizontal plane when 1.7GHz, 2.2GHz and 2.7GHz in frequency。
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this。
Embodiment
As shown in Figures 1 to 4, the present embodiment one broadband high-isolation dual polarization antenna radiating element, including reflecting plate the 4, first fed element the 5, second fed element the 6, first radiant body, the second radiant body and four support members, four support members are that centre is emptied and top metal cylinder jaggy。Wherein four support member respectively the first support member 1a, the second support member 1b, the 3rd support member 1c and the four support member 1d, described four support members are distributed on foursquare four angles, wherein the position of the first support member 1a and the three support member 1c is relative, and the position of the second support member 1b and the four support member 1d is relative。
First radiant body is made up of the two of diagonal angle radiant bodies 11 and 13, and the second radiant body is made up of the two of diagonal angle radiant bodies 12 and 14；Four radiant bodies are separately fixed on four support members, and four support members are mutually independent by the mode welded and are fixed on reflecting plate 4。Radiant body 11 is fixed on the first support member 1a, and radiant body 12 is fixed on the second support member 1b, and radiant body 13 is fixed on the 3rd support member 1c, and radiant body 14 is fixed on the 4th support member 1d。
First fed element 5 is the feed structure of the first radiant body, and described second fed element 6 is the feed structure of the second radiant body, and wherein the first fed element and the second fed element are the metal fed element of " Γ " type；First fed element 5 top is welded on the gap position of support member 1c after the first support member 1a, and the second fed element 6 top is welded on the gap position of support member 1d after support member 1b；The top of the first fed element 5 and the second fed element 6 is mutually orthogonal, and has a difference in height d。First fed element 5 and the second fed element 6 respectively with two SMA(SubMiniatureversionA, mini A class joint) 5f and 6f union joint middle probe connect, the outer conductor of two SMA is connected with reflecting plate respectively。Metal is fed by the signal of coaxial line transmission by sub-miniature A connector, and the signal of feedback passes to the radiant section at top from the bottom of generating aid, then is radiate by radiant section。
One cross gap of four radiant body intermediate formation, four radiant body centre positions is provided with length more than radiant body and towards the rectangle minor matters 3a in radiant body outer ledge direction, 3b, 3c and 3d。Wherein length is divided beyond the part of radiant body and is bent vertically downward；The rectangle minor matters of four radiant bodies are mutually orthogonal；The structure of four radiant bodies, form and dimension are all identical。Each radiant body outer ledge is provided with arc minor matters 2a, 2b, 2c and 2d, and four radiant bodies constitute circular configuration。If the arcuate structure of each radiant body outer ledge is arranged to rectangle minor matters, then what four radiant bodies of the present embodiment were constituted is a square structure。
As illustrated in Figures 5 and 6, the present embodiment utilizes above-mentioned multiple dual polarization antenna radiation units composition dual-polarized antenna array, adopting power division network to combine feed to form aerial array between multiple dual-polarization radiating units, the reflecting plate edge of aerial array is provided with internal layer flange 7 and outer layer flange 8。
It is illustrated in figure 7 the voltage standing wave ratio of the dual polarization antenna radiation unit of the present embodiment, where the dotted line signifies that is the voltage standing wave ratio of port one of antenna, what solid line represented is the voltage standing wave ratio of the port two of antenna, as can be seen from the figure, the present embodiment antenna within the scope of the working band of 1.71-2.69GHz, voltage standing wave ratio VSWR < 1.5。What wherein the present embodiment port one connected is the first fed element and the first radiant body, and what port two connected is the second fed element and the second radiant body。
Being illustrated in figure 8 the isolation between the dual polarization antenna radiation unit port one of the present embodiment and port two, within the scope of the working band of 1.71-2.69GHz, the isolation of the present embodiment antenna almost can reach 40dB。
Being illustrated in figure 9 the gain of the dual polarization antenna radiation unit port one of the present embodiment, as seen from Figure 8, the present embodiment antenna is within the scope of the working band of 1.71-2.69GHz, and gain is basically stable within the scope of 9 ± 0.7dBi。
Port one and the main polarization and cross-polarized directional diagram of port two horizontal plane over different frequencies such as Figure 10 and 11 respectively this enforcement dual polarization antenna radiation unit, the present embodiment dual polarized antenna is within the scope of the working band of 1.71-2.69GHz, half-power beam lobe width is 65 ± 4 degree, wherein the cross polarization of 0 degree is all at more than 38dB, therefore two poliarizing antennas on antenna radiation unit influence each other only small。The antenna pattern of same poliarizing antenna is very stable, and on the frequency of 1.7GHz-2.7GHz, its radiation direction is held essentially constant。Drawing from Figure 10 and 11, port one and port two are under same frequency, and its antenna direction is basically identical, therefore can well be grouped together into dual polarized antenna。
There are two resonance points in the present embodiment dual polarized antenna within the scope of the working band of 1.71-2.69GH, first resonance point is low-frequency resonant point, refer to the resonance point that the intrinsic operating frequency of each dual polarization antenna radiation unit oneself is corresponding, it is relevant with the electrical length of antenna, mainly determined by the length dimension of antenna itself, but the rectangle minor matters of the arc minor matters with radiation dignity centre position by increasing radiant body outer ledge have the effect increasing antenna electrical length, thus changing first resonance point of this poliarizing antenna。Second resonance point is high-frequency resonant point, be the inductance by radiating element every pair poliarizing antenna and inductance capacitance combination obtain, the minor matters radiating the rectangle minor matters in dignity and radiant body outer ledge act as the effect of inductance and electric capacity, when one pair of which antenna feed electricity work in radiating element, such as 1a, 2a, 3a and 1c, 2c, the antenna of 3c part composition is fed work by the first fed element 5, all the other part 1b not fed, 2b, 3b and 1d, 2d, 3d is equivalent to a capacitive load on the antenna of feed work, and rectangle minor matters 3a and the 3c on minor matters 2a and the 2c of radiant body 11 and 12 outer ledge and face is equivalent to an inductance, the electric capacity of loaded equivalence and inductor combination are together into a new resonant frequency, i.e. the second resonance point。Suitably regulate the two resonant frequency and just can be readily available required impedance matching bandwidth。
Above-described embodiment is the present invention preferably embodiment; but embodiments of the present invention are also not restricted to the described embodiments; the change made under other any spirit without departing from the present invention and principle, modification, replacement, combination, simplification; all should be the substitute mode of equivalence, be included within protection scope of the present invention。
Claims (10)
1. a broadband high-isolation dual polarization antenna radiating element, form by two radiant bodies at diagonal angle including reflecting plate, the first fed element, the second fed element, the first radiant body, the second radiant body and four support members, described first radiant body and the second radiant body；Described four radiant bodies are separately fixed on four support members, described four support members are fixed on reflecting plate, it is characterized in that: the top of described first fed element and the second fed element is mutually orthogonal, and there is a difference in height, described first fed element is the feed structure of the first radiant body, second fed element is the feed structure of the second radiant body, described one cross gap of four radiant body intermediate formation；Being provided with length more than radiant body and towards the rectangle minor matters in radiant body outer ledge direction on each described radiation dignity centre position, each described radiant body outer ledge is provided with minor matters；Wherein radiant body outer ledge refers to a radiant body lateral edges away from support member, the direction pointing to radiant body outer ledge represented towards radiant body outer ledge direction。
2. the broadband high-isolation dual polarization antenna radiating element according to any one of claim 1, it is characterised in that the length of described rectangle minor matters is bent downwardly beyond the sections transverse of radiant body；Rectangle minor matters in described four radiation dignity are mutually orthogonal；The structure of described four radiant bodies, form and dimension are all identical。
3. broadband high-isolation dual polarization antenna radiating element according to claim 1, it is characterised in that the minor matters of described radiant body outer ledge are arc, described four radiant bodies constitute circular configuration。
4. broadband high-isolation dual polarization antenna radiating element according to claim 1, it is characterised in that the minor matters of described radiant body outer ledge are rectangle, described four radiant bodies constitute square structure。
5. broadband high-isolation dual polarization antenna radiating element according to claim 1, it is characterised in that described first fed element and the second fed element are the metal fed element of " Γ " type。
6. broadband high-isolation dual polarization antenna radiating element according to claim 5, it is characterised in that described four support members are that metal cylinder is emptied in centre；
Described four support members respectively the first support member, the second support member, the 3rd support member and the 4th support member, described four support members are distributed on foursquare four angles, wherein the position of the first support member and the 3rd support member is relative, and the position of the second support member and the 4th support member is relative；
Described first fed element top is fixing with the 3rd support member after the first support member to be connected, and described second fed element top is fixing with the 4th support member after the second support member to be connected；
Bottom described first fed element and the second fed element, middle probe with two SMA union joints is connected respectively, and the outer conductor of two SMA is connected with reflecting plate。
7. broadband high-isolation dual polarization antenna radiating element according to claim 5, it is characterized in that, described four support member tops are jagged, described first fed element top is connected on the gap position of the 3rd support member by the mode welded after the first support member, and described second fed element top is connected on the gap position of the 4th support member by the mode welded after the second support member。
8. broadband high-isolation dual polarization antenna radiating element according to claim 1, it is characterised in that described four support members are fixed on reflecting plate independently of one another by the mode welded。
9. the dual polarized antenna based on the broadband high-isolation dual polarization antenna radiating element described in claim 1, it is characterized in that, include at least 2 dual polarization antenna radiation units, between multiple dual-polarization radiating units, adopt power division network to combine feed to form aerial array。
10. dual polarized antenna according to claim 9, it is characterised in that described reflecting plate edge is provided with internal layer flange and outer layer flange。
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| CN201210559968.9A CN103066376B (en) | 2012-12-20 | 2012-12-20 | A kind of broadband high-isolation dual polarization antenna and radiating element thereof |
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| CN103560317A (en) * | 2013-11-12 | 2014-02-05 | 沃丰广州有限公司 | Multi-frequency and multi-mode ultra wide band antenna |
| CN103647140B (en) * | 2013-12-16 | 2016-05-18 | 广州杰赛科技股份有限公司 | Dual polarized antenna |
| CN103715522B (en) * | 2014-01-20 | 2016-09-14 | 武汉虹信通信技术有限责任公司 | A kind of multi-antenna array supporting multi-standard |
| CN105281031B (en) * | 2015-11-16 | 2018-02-27 | 广东博纬通信科技有限公司 | A kind of ultra-wideband dual polarization low-frequency vibrator unit and its multi-band array antenna |
| CN106099328A (en) * | 2016-06-27 | 2016-11-09 | 广州杰赛科技股份有限公司 | A kind of Bipolarization antenna for base station |
| CN109786982B (en) * | 2019-03-18 | 2024-03-08 | 北方通用电子集团有限公司 | Conformal dual polarized antenna based on two-path differential power divider feed |
| CN109888463B (en) * | 2019-03-28 | 2023-12-05 | 中天宽带技术有限公司 | Dual-polarized 5G base station antenna |
| CN110233340B (en) * | 2019-06-14 | 2021-01-15 | 大连海事大学 | Double-frequency dual-polarization 5G antenna loaded with square slotted patch |
| CN111082231A (en) * | 2019-10-14 | 2020-04-28 | 佛山科新锘通讯有限公司 | MIMO omnidirectional antenna |
| WO2021128006A1 (en) * | 2019-12-24 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Antenna element and base station |
| CN113451757B (en) * | 2021-06-28 | 2023-11-14 | 中信科移动通信技术股份有限公司 | Broadband dual-polarized radiating element |
| CN114583441A (en) * | 2022-04-01 | 2022-06-03 | 维沃移动通信有限公司 | Antenna structure and electronic device |
| CN118017198A (en) * | 2022-11-09 | 2024-05-10 | 华为技术有限公司 | Dual polarized antenna unit, antenna device and base station system |
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