CN102315516A - Dual-frequency band antenna used for wireless communication system and coaxial antenna array structure thereof - Google Patents
Dual-frequency band antenna used for wireless communication system and coaxial antenna array structure thereof Download PDFInfo
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- CN102315516A CN102315516A CN2010102238872A CN201010223887A CN102315516A CN 102315516 A CN102315516 A CN 102315516A CN 2010102238872 A CN2010102238872 A CN 2010102238872A CN 201010223887 A CN201010223887 A CN 201010223887A CN 102315516 A CN102315516 A CN 102315516A
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Abstract
The invention discloses a dual-frequency band antenna used for a wireless communication system and a coaxial antenna array structure thereof, and belongs to the technical field of antennae. An antenna unit consists of two parts, wherein the two parts are respectively formed by connecting a semi-closed cylinder and an arc-shaped metal piece (connecting 1_1 with 1_2 and connecting 1_4 with 1_3); and the two parts are fixed together through central metal tubes. The antenna array structure consists of a plurality of antenna units and a power divider (2). The central metal tubes of the antenna units are interconnected with each other; coaxial feeder lines are connected with the input end of the power divider through the central metal tubes; and the output end of the power divider feeds for each antenna unit respectively. The antenna array can achieve the effects of protecting a structure and beautifying the antenna by selecting and adding a non-metal cover.
Description
Technical field
This patent antenna relates to a kind of antenna; Particularly a kind of two-band high-gain aerial and coaxial antenna array structure thereof; Can be used as mobile communication omnidirectional antenna in the discharging-directly station antenna in community or road wing lamp, utilize radome in as antenna, can play the effect of beautifying and decorating.
Background technology
Society in modern times, people to communication require increasingly high, any time, any place, provide the rapid and reliable communication service to become the target of future communications to anyone.Realize this target, mobile communication has played crucial effects.
Constantly perfect along with development of electronic technology and cellular technology, the mobile communication cause worldwide obtains fast development.Antenna can be described as the throat thoroughfare of wireless communication system as an important part in the wireless communication system, is radiation and reception electromagnetic waves parts.The quality of antenna performance has directly influenced the performance of communication system.One secondary high performance antenna can relax the requirement of system and improve the performance of whole system.The key problem of modern antenna design is exactly to make antenna satisfy specification requirement more harsh in the new system, and surmounts original antenna form, satisfies new system requirements.In cell phone, global positioning system (GPS), synthetic aperture radar (SAR), satellite communication, personal communication fields such as (GSM900/DCS 1800), all press in light weight, make simple, conformal broadband or dual-band antenna easily.Meanwhile; Mobile communication subscriber quantity increases rapidly, and it is more and more nervous that frequency spectrum resource becomes, and forces communication system to be brought in constant renewal in and dilatation; For reducing the interference between antenna and reducing cost; Require antenna in broad frequency range, to work, satisfy the communicating requirement of a plurality of systems simultaneously, realize shared by multiple systems and transmit-receive sharing.Study the shared antenna of a plurality of systems and can reduce the number of antenna and reduce inter-antenna interference and antenna cost, therefore, antenna has been proposed double frequency or multifrequency requirement.
Broadband/multiband and discharging-directly station antenna simple and compact for structure have become the research direction of current domestic and international field of antenna.Therefore; How, realize the characteristics of wireless mobile communications antenna broadband and multiband, obtain bigger, the more effective communication frequency range of communication system acquisition by simple relatively discharging-directly station antenna structure; Simultaneously; Reduce the difficulty that antenna is made, effectively strengthen network and extend covering power, the better selection that all is Antenna Design when using.
Summary of the invention
It is a kind of simple in structure that the purpose of this patent is to provide, and working band is wide, dual-band antenna that is easy to regulate and coaxial antenna array thereof.Mainly solve the problem that existing wireless communications antenna frequency band is narrow, gain is low; The design philosophy that has merged embellished antenna simultaneously (can be made in the light pole; Merge with surrounding environment is perfect), a kind of dual-band antenna and coaxial antenna array thereof are provided, present in the employing; Make two parts aerial radiation symmetry, overcome the shortcoming of low feedback collinear array beam tilt.
Antenna element is made up of two parts, and these two parts are respectively a semiclosed cylinder and connect one section circular arc sheet metal (1_1 connects 1_2,1_4 connects 1_3), and two parts are fixed together through the central metal pipe.The antenna array structure is made up of several antenna elements and power splitter (2).The central metal pipe of antenna element connects mutually, and coaxial feeder links to each other with power splitter (2) input via the central metal pipe, and power splitter (2) output is respectively each antenna element feed.An antenna element part is connected with the outer conductor of coaxial line, and as earth terminal, another part is via coaxial inner conductor direct feed, and the length of this inner wire feed is the clearance distance between two parts.
Antenna element can produce a center resonant frequency respectively at low frequency and HFS, and its medium and low frequency center resonant frequency is about 900MHz, and the high frequency center resonant frequency is about 2GHz.Different size through regulating on the antenna is regulated the frequency values of center resonant frequency and the performance that the coupling degree of depth reaches designing requirement.
Several antenna elements are controlled apart from central metal pipe bottom lengths apart from distance and last antenna element of the distance between central metal pipe top distance, the adjacent antenna units, power splitter (2) both sides antenna element by first antenna element in the position on the central metal pipe, and these distances can be regulated between the adjacent antenna units, the coupling between antenna element and the central metal pipe.In addition, this antenna is in order to be installed in the radome, and nonmetallic chassis need be installed in the two ends that the central metal rostrum goes out, and is fixed on the radome.This chassis can be circle, rectangle, and regular figure such as ellipse, concrete shape is decided according to the shape of radome.
Power splitter (2) can be processed on the microwave transmission line structure of pcb board or other, can be accommodated in the radome and has good matching properties, is each antenna element feed, does not influence the performance of integrated antenna battle array.
This antenna array can select to increase a nonmetallic radome, plays protection antenna structure and the effect that beautifies conceal antenna.Simultaneously, the shape of radome can change, for example cylinder, cuboid, square, and perhaps other can hold the shape of this antenna.
Embodiment
Below in conjunction with a certain preferred embodiments and accompanying drawing thereof this patent antenna array structure is described further.
As a preferred embodiments, shown in Fig. 1～6.The central metal pipe of this antenna array is a hollow metal tube, and two antenna elements of second portion are fixed on the central metal pipe.Central metal thickness of pipe wall 1mm, diameter 16mm.Power splitter is in the centre position of entire antenna structure, and the metal tube low side gets into the 50Ohm concentric conductor aerial signal from the center, is divided into two signals at the power splitter place by power splitter, passes to two antenna elements respectively.
As a preferred embodiments, shown in Fig. 1～6.Height ha_1 through regulating upper metal tube (1_1) is 45mm; The height hb_1 of lower metal tube (1_4) is 30mm; Confirm that low frequency foL and center resonant frequency are greatly about 900MHz; High frequency center resonant frequency foH is greatly about 2GHz, and guaranteeing simultaneously has the darker coupling degree of depth in the low frequency center resonant frequency, reaches to obtain bandwidth; The start point of upside circular arc sheet metal (1_2) is 140 ° (upside circular arc sheet metal arc length 74mm); The angle of downside circular arc sheet metal (1_3) is 230 ° (downside circular arc sheet metal arc length 120mm); Accurately adjustment low frequency place bandwidth satisfies the requirement of 820-960MHz, the coupling degree of depth of deepening high frequency center resonant frequency foH.The height ha of upside circular arc sheet metal is 13mm in addition; The height hb of downside circular arc sheet metal is 10mm; Can control the match width of high band like this, guarantee to have the coupling bandwidth of broad, in low frequency part the darker coupling degree of depth can be arranged also simultaneously at high band.The measured result of antenna element is as shown in Figure 7, under the requirement of VSWR＜1.5, and the wide low frequency 150MHz (820-980MHz) that reached of antenna working band, high frequency 600MHz (1.7-2.3GHz) has reached designing requirement well.
As a preferred embodiments, shown in Fig. 1～6.An antenna element part is connected with the outer conductor of coaxial line, and as earth terminal, another part is via coaxial inner conductor direct feed, and the length of this inner wire feed is the clearance distance between two parts.
As a preferred embodiments, shown in Fig. 1～6.Two antenna element XY planes are towards differing 180 °.Two cellular constructions are identical, guaranteed the omni-directional of entire antenna.
As a preferred embodiments, shown in Fig. 1～6.Two semiclosed metal cylinder blind ends of each antenna element of this antenna array all are fixed on the central metal pipe.First antenna element apart from central metal pipe top apart from d1=30mm, power splitter both sides antenna element apart from d2=80mm, second antenna element apart from central metal pipe bottom lengths d3=30mm, this has controlled the coupling between the antenna element.Make the performance of entire antenna reach requirement.As with preferred embodiments, shown in Fig. 1-5.The power splitter of this antenna is processed on the pcb board, is two power splitters, has good matching properties, is the antenna element feed, does not influence the performance of integrated antenna battle array.
Fig. 7 and shown in Figure 12 be the measurement result figure of the said preferred embodiments of this patent antenna.Can be known that by Fig. 7 under the condition of voltage standing wave ratio VSWR＜1.5, the bandwidth of operation of antenna is: low-frequency range is about 150MHz (820-970MHz), and antenna gain is 6.8dB, and high band is about 600MHz (1.7-2.3GHz), and antenna gain is 6.7dB.This result can be good satisfy current GSM two-band (820～960MHz and 1.7～2.3GHz) job requirement.
Fig. 8 and 9 is depicted as the directional diagram of the said preferred embodiments of this patent antenna.Can be got by Fig. 8, Fig. 9, Figure 10, Figure 11, antenna is omnidirectional or approximate omnidirectional in low-frequency range (900MHz) and high band (2G).
Above reference example has been described this patent, but only is clear for understanding, and provides above-mentioned detailed description and example.Should not understand unnecessary restriction thus.Said all patents and patent application are incorporated herein for your guidance, for a person skilled in the art, under the situation that does not deviate from scope of the present invention, can in described embodiment, make many changes.Therefore scope of the present invention does not should be limited to said detail and structure, but is limited the equivalence of the described structure of the language of claims and these structures.
Description of drawings
Fig. 1 is a this patent antenna array preferred embodiments overall structure schematic perspective view;
Fig. 2 is a this patent antenna array preferred embodiments overall structure front view;
Fig. 3 is a this patent antenna array preferred embodiments antenna element front view;
Fig. 4 is this patent antenna array preferred embodiments antenna element A, B face cutaway view;
Fig. 5 is a this patent antenna array preferred embodiments antenna element stereogram;
Fig. 6 is this patent antenna array preferred embodiments power divider structure figure;
Fig. 7 is actual measurement voltage standing wave ratio (VSWR) figure as a result of this patent antenna array preferred embodiments;
Fig. 8 is the frequency of preferred embodiments of the present invention when being 900MHz, E face directional diagram;
Fig. 9 is the frequency of preferred embodiments of the present invention when being 900MHz, H face directional diagram;
Figure 10 is the frequency of preferred embodiments of the present invention when being 2GMHz, E face directional diagram;
Figure 11 is the frequency of preferred embodiments of the present invention when being 2GMHz, H face directional diagram;
Figure 12 is the gain diagram of preferred embodiments of the present invention.
Claims (8)
1. a dual-band antenna and coaxial antenna array structure thereof that is applied to wireless communication system, its characteristic is mainly antenna element (1), and the antenna array structure is made up of several antenna elements and power splitter (2).The central metal pipe of antenna element connects mutually, and coaxial feeder links to each other with the power splitter input via the central metal pipe, and the power splitter output is respectively each antenna element feed.
2. a kind of dual-band antenna and coaxial antenna array structure thereof that is applied to wireless communication system as claimed in claim 1; It is characterized in that: the antenna element of this antenna array can be same structure; Also can be different structure, require on its structure all can be serially connected by the central metal pipe securely.
3. a kind of dual-band antenna and coaxial antenna array structure thereof that is applied to wireless communication system as claimed in claim 1; It is characterized in that: each unit is made up of two parts, and two-part structure is that semi-enclosed metal cylinder connects one section circular arc sheet metal (1_1 connects 1_2,1_4 connects 1_3).Be connected through coaxial line between power splitter (2) and the unit.The bottom surface of the metal cylinder of antenna element can be circle, also can be rectangle, square, rhombus, ellipse, and perhaps shapes of changing of other rules are looked concrete application scenarios and decided.
4. a kind of dual-band antenna and coaxial antenna array structure thereof that is applied to wireless communication system as claimed in claim 1; It is characterized in that: an antenna element part is connected with the outer conductor of coaxial line; As earth terminal; Another part is via coaxial inner conductor direct feed, and the length of this inner wire feed is the clearance distance between two parts.
5. a kind of dual-band antenna and coaxial antenna array structure thereof that is applied to wireless communication system as claimed in claim 1; It is characterized in that: the antenna element of this antenna array; The unit that they are different on the XY plane towards can be different; Between angle can be 180 °, 120 ° or 90 ° etc., look element number and decide.
6. a kind of dual-band antenna and coaxial antenna array structure thereof that is applied to wireless communication system as claimed in claim 1; It is characterized in that: the antenna element of this antenna array all with the central metal pipe at same axis; But its Z axle also can be opposite towards can be identical, viewing system designing requirement and deciding.
7. a kind of dual-band antenna and coaxial antenna array structure thereof that is applied to wireless communication system as claimed in claim 1; It is characterized in that: this antenna array can select to increase a nonmetallic radome, plays protection antenna structure and the effect that beautifies conceal antenna.Simultaneously, the shape of radome can change, for example cylinder, cuboid, square, and perhaps other can hold the shape of this antenna.
8. a kind of dual-band antenna and coaxial antenna array structure thereof that is applied to wireless communication system as claimed in claim 1; It is characterized in that: power splitter can be processed on pcb board or other the microwave transmission line structure; Can be accommodated in the radome and have good matching properties; Be each antenna element feed, do not influence the performance of integrated antenna battle array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102238872A CN102315516A (en) | 2010-07-05 | 2010-07-05 | Dual-frequency band antenna used for wireless communication system and coaxial antenna array structure thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102238872A CN102315516A (en) | 2010-07-05 | 2010-07-05 | Dual-frequency band antenna used for wireless communication system and coaxial antenna array structure thereof |
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| CN102315516A true CN102315516A (en) | 2012-01-11 |
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| CN2010102238872A Pending CN102315516A (en) | 2010-07-05 | 2010-07-05 | Dual-frequency band antenna used for wireless communication system and coaxial antenna array structure thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332708A (en) * | 2014-10-29 | 2015-02-04 | 熊猫电子集团有限公司 | UHF/S dual-band phased array antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2531529Y (en) * | 2001-08-23 | 2003-01-15 | 西安海天天线科技股份有限公司 | Wide band center-fed dipole collinear antenna array |
| CN1404318A (en) * | 2001-09-05 | 2003-03-19 | 西安海天天线科技股份有限公司 | Wideband omnidirectional collinear antenna array with downwards bevel beam and its realizing method |
| EP1267447B1 (en) * | 2000-02-24 | 2006-08-09 | China Academy of Telecommunications Technology | Distributive intelligent antenna system |
-
2010
- 2010-07-05 CN CN2010102238872A patent/CN102315516A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1267447B1 (en) * | 2000-02-24 | 2006-08-09 | China Academy of Telecommunications Technology | Distributive intelligent antenna system |
| CN2531529Y (en) * | 2001-08-23 | 2003-01-15 | 西安海天天线科技股份有限公司 | Wide band center-fed dipole collinear antenna array |
| CN1404318A (en) * | 2001-09-05 | 2003-03-19 | 西安海天天线科技股份有限公司 | Wideband omnidirectional collinear antenna array with downwards bevel beam and its realizing method |
Non-Patent Citations (1)
| Title |
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| 徐晓宁等: "一种新型圆筒形双频带天线的设计", 《2009年全国天线年会论文集（下）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332708A (en) * | 2014-10-29 | 2015-02-04 | 熊猫电子集团有限公司 | UHF/S dual-band phased array antenna |
| CN104332708B (en) * | 2014-10-29 | 2017-07-07 | 熊猫电子集团有限公司 | UHF/S two-band phased array antenna |
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Application publication date: 20120111 |