CN1851981B - Bidirectional multi-frequency integrated antenna - Google Patents
Bidirectional multi-frequency integrated antenna Download PDFInfo
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- CN1851981B CN1851981B CN2006100403845A CN200610040384A CN1851981B CN 1851981 B CN1851981 B CN 1851981B CN 2006100403845 A CN2006100403845 A CN 2006100403845A CN 200610040384 A CN200610040384 A CN 200610040384A CN 1851981 B CN1851981 B CN 1851981B
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- antenna
- branch
- little band
- transmission line
- dielectric substrate
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Abstract
This invention discloses a double multi-frequency integration antenna including a medium chip and shape-T branch, in which, a micro-strip transmission line, a micro-strip ground and at least two pairs of symmetrical vibrator antennas are set at two surfaces of the medium chip, the unbalance input end of the T branch is connected with the micro-strip transmission line and the ground, the balance output end of the T branch is connected with a symmetrical vibrator antenna in the symmetrical vibrator antennas, the other balance output end of the branch is connected with the other antenna, the pair of vibrators on the two surfaces of the medium chip are connected with the balanced output ports of the two T branches on the two surfaces of the chip and the micro-strip ground is connected with the vibrators of the antenna by graded lines.
Description
Technical field
The present invention relates to a kind of antenna that can be used for fields such as radio communication, information broadcast, detecting, electronic countermeasures, relate in particular to a kind of bidirectional multi-frequency integrated antenna of using in the communication system of multi-frequency multi-mode coexistence of being adapted at.
Background technology
Suitable antenna direction diagram form plays an important role to the performance of communication system.Usually the antenna that uses in wireless system mostly is the antenna of unidirectional directed radiation and azimuth plane omnidirectional radiation, but needs the antenna of bidirectional radiation to realize the reasonable distribution of energy and suppress interference under special environment.The method that method (as the binary battle array) the unidirectional directional radiation antenna identical with two that bilateral antenna now commonly used mainly is made up of gust omnidirectional antenna sets up back-to-back realizes.These two kinds of methods all are to realize by the machinery combination with identical antenna.They all have bulky shortcoming, still can use at outdoor environment or to the occasion that spatial volume is not particularly limited, and then can't use substantially in indoor environment or occasions with limited space.In addition,,, can not in an antenna, realize multi-frequency multi-mode work, above-mentioned antenna is restricted on using so all can only on a frequency range, realize the bilateral antenna radiance because they are to be combined by separate single antenna.Along with the continuous development of mechanics of communication, the application of indoor communication is more and more, and the occasion of the communication system coexistence of different frequency range, different mode is also more and more.But therefore need the bilateral antenna that a kind of new method realizes the little multiple-frequency operation of volume.
Summary of the invention
The invention provides the little bidirectional multi-frequency integrated antenna of a kind of volume, when the present invention realizes integrated multi-frequency multi-mode bidirectional radiation characteristic, have littler physical dimension, be more suitable for indoor use, it is low also to have cost, and processing is simple, the characteristics that are easy to produce in enormous quantities.
The present invention adopts following technical scheme:
A kind of bidirectional multi-frequency integrated antenna that in communication system, uses, comprise dielectric substrate, two surfaces at dielectric substrate are respectively equipped with microstrip transmission line, little band ground and at least two secondary doublet antennas, the other end on microstrip transmission line and little band ground is connected with T-branch respectively and is connected with the uneven input port of T-branch respectively, a doublet antenna in above-mentioned each secondary doublet antenna is connected with the balance output port of T-branch, another doublet antenna is connected with another balance output port of T-branch, the any a pair of oscillator of forming doublet antenna lays respectively on two surfaces of dielectric substrate and is connected with the balance output port that is positioned at two lip-deep two T-branches of dielectric substrate respectively, is connected with the transition line balanced-unbalanced transformer between the oscillator of little band ground and doublet antenna.
Compared with prior art, the present invention has following advantage:
1. with the bilateral antenna ratio of forming by Back-to-back installation with identical directional antenna, antenna of the present invention has very little volume, thereby the applications of the limited space system of being particularly suitable for, and uses down as indoor environment, hidden environment.
2. compare by the bilateral antenna that composition is installed back-to-back with the bilateral antenna of realizing with the method for omnidirectional antenna group battle array and with identical directional antenna, antenna of the present invention is except that realizing the bidirectional radiation characteristic, also have the advantage that can realize multiband multimode work, method in the past can only realize single band operation.
3. antenna of the present invention has the advantage of the two-way beam radiation direction of convenient control, need not increase any circuit, as long as radiating element adjusts slightly and can realize the variation that two-way wave beam end-fire or limit are penetrated.The bilateral antenna of formula can't be realized this function back-to-back; The bilateral antenna of two general identical omnidirectional antenna group battle arrays, realization limit are penetrated needs the extra parts that increase, and has increased the cost and the structural complexity of antenna when increasing volume.
4. this antenna feed structure is simple, and feed, merit branch, balanced-unbalanced circuit and antenna integrated design can realize single-frequency or multiple-frequency operation by a cable direct feed.
5. the each several part of entire antenna is simple in structure, all utilizes simple and ripe explained hereafter, and cost is low, precision is high, good reproducibility, is fit to produce in enormous quantities.
Description of drawings
Fig. 1 is the circuit structure of bilateral antenna on the dielectric substrate.
Fig. 2 is the bidirectional multi-frequency integrated antenna front view.
Fig. 3 is the bidirectional multi-frequency integrated antenna left view.
Fig. 4 is the bidirectional multi-frequency integrated antenna vertical view.
Fig. 5 is the bidirectional multi-frequency integrated antenna stereogram.
Fig. 6 is the dual-band antenna circuit structure of bidirectional multi-frequency antenna.
Fig. 7 is the another kind of circuit structure of the dual-band antenna of bidirectional multi-frequency antenna.
Fig. 8 is the antenna circuit structure that characteristic is penetrated on bidirectional multi-frequency antenna realization limit.
Fig. 9 is the actual measurement H face directional diagram of bidirectional multi-frequency antenna.
Figure 10 is the actual measurement E face directional diagram of bidirectional multi-frequency antenna.
Figure 11 is the actual measurement S11 characteristic of bidirectional multi-frequency antenna.
Embodiment
A kind of bidirectional multi-frequency integrated antenna that in communication system, uses, comprise dielectric substrate 1, two surfaces at dielectric substrate 1 are respectively equipped with microstrip transmission line 21, little band ground 22 and at least two secondary doublet antennas 3, the other end on microstrip transmission line 21 and little band ground 22 is connected with T-branch 6 respectively and is connected with the uneven input port of T-branch 6 respectively, a doublet antenna in above-mentioned each secondary doublet antenna is connected with the balance output port of T-branch, another doublet antenna is connected with another balance output port of T-branch, the any a pair of oscillator of forming doublet antenna lays respectively on two surfaces of dielectric substrate 1 and is connected with the balance output port that is positioned at 1 two lip-deep two T-branches 6 of dielectric substrate respectively, is connected with the transition line balanced-unbalanced transformer between the oscillator of little band ground 22 and doublet antenna.Above-mentioned dielectric substrate 1 stands on the metal ground 4, and little band ground 22 is connected with metal ground 4.Above-mentioned transition line balanced-unbalanced transformer can have two kinds of implementations at least, the first: the transition line balanced-unbalanced transformer is located between the oscillator that is connected in T-branch 6 and doublet antenna respectively and the two ends of this transition line balanced-unbalanced transformer 7 are connected with the uneven input port and the doublet antenna oscillator of T-branch 6 respectively; It two is: the transition line balanced-unbalanced transformer is located between the balance output port of little band ground 22 and T-branch 6 and the two ends of this transition line balanced-unbalanced transformer are connected with the balance output port of little band ground 22 and T-branch 6 respectively.Present embodiment also is provided with tuning 23 at microstrip transmission line 21.
The present invention is used to realize that the antenna of bidirectional multi-frequency radiation comprises a little band dielectric substrate 1, feed circuit 2 and at least two secondary doublet antennas 3 on little band dielectric substrate 1, the little band dielectric substrate 1 that has feed circuit 2 and element antenna 3 places on the metal ground plane 4, coaxial cable 5 passes metal ground plane 4, the input microstrip transmission line 21 of feed circuit 2 is connected on the inner wire 51 of coaxial cable 5 and the little band dielectric substrate 1, the outer conductor 52 of coaxial cable 5 simultaneously with little band dielectric substrate 1 on the little band of the input ground 22 of feed circuit 2 be connected with metal ground plane 4, also can not use metal ground plane 4 as required, and outer conductor 52 is only directly linked to each other with the little band of input ground 22, on little band dielectric substrate 1, lower surface has microstrip transmission line 21 and little band ground 22, by T-branch 6 signal energy is divided into two, two branches respectively through the transition line balanced-unbalanced transformer 7 of two same structures with transmission line never balance end 8 transform to transmission line balance end 9 gradually (balanced-unbalanced transformer also can be realized on input feed circuit 2, promptly before being divided into two, signal energy realizes), on the balance transmission line end 9 of each branch and follow-up extended line thereof, at least respectively be connected to a secondary doublet antenna 3, two arms 31 of symmetrical dipole, 32 respectively on transmission line balance end 9 on little band dielectric substrate 1, the band 91 of following two faces, on 92 and perpendicular to transition line balanced-unbalanced transformer 7, for reducing antenna size, oscillator arms 31,32 ends can be done 90 degree folding 33,34, on microstrip transmission line 21, also can increase tuning 23 as required, by changing tuning 23 position on microstrip transmission line 21 and the big or small stationary wave characteristic that can regulate antenna easily, little band dielectric substrate 1 and the feed circuit 2 on it and doublet antenna 3 place within the radome 10 to obtain protection.
A kind of bilateral antenna that is operated in WLAN 802.11b/g frequency band as shown in Figure 5, little band dielectric substrate of antenna and top feed circuit and printed antenna such as Fig. 1 thereof.It is that the dielectric constant of 1mm is 2.65 the two-sided copper clad plate of glass fibre-polytetrafluoroethylene that dielectric substrate has been selected thickness for use.The connected mode of signal feed-in point is that the inner wire 51 of coaxial cable 5 is connected with feeder line input 21; the outer conductor 52 of coaxial cable 5 is connected with the little band of feeder line input ground 22; also weld together simultaneously with metal ground plane 4; to guarantee good ground connection performance; see Fig. 1, Fig. 2, Fig. 4 and Fig. 4, radome 10 is used to protect antenna and plays beautification function.The S11 Frequency Response test result of directional diagram and expression port return loss is seen Fig. 9, Figure 10 and Figure 11.
Embodiment 3
A kind of feed of two-way DBDM antenna and oscillator structure are as shown in Figure 6.On little band dielectric substrate 1, feed circuit 2 is arranged, two groups of element antenna (totally 4 pairs) H (2 pair) that work in different frequency, L (2 pair), T-branch 6, balanced-unbalanced transformer 7, one group of element antenna H that frequency is high places between one group of low element antenna L of frequency, the end of same one group of antenna oscillator arm of low frequency can do 90 ° folding 33,34, to reduce antenna size, balanced-unbalanced transformer 7 also can adopt on the main feeder of structure shown in Figure 7 before T-branch and realize, the signal of two frequency bands can be by a coaxial cable by 21,22 places carry out feed to antenna.The method of attachment of antenna and coaxial cable 5, metal ground plane 4 is identical with the method for embodiment 1, and antenna places within the radome 10, and is also identical with embodiment 1.This method can make the antenna of two frequency ranges that differ certain intervals integrate the bidirectional radiation characteristic that realizes DBDM simultaneously, can expand similarly to be used for the bilateral antenna that a plurality of frequency ranges constitute multi-frequency multi-mode.
Two radiation directions of embodiment 2 and embodiment 3 bilateral antennas all with little band dielectric substrate 1 vertical (vertical) with the unit line, embodiment 4 has provided another structure makes two radiation directions of bilateral antenna can be parallel with little band dielectric substrate 1, this structure makes dual directional antenna configuration more flexible, be adapted at the constrained narrow space applications in locus, form along the flat antenna of radiation direction.A kind of by making the anti-phase method of oscillator inverted arrangements make two-way wave beam along including radiating doublet Supporting Media such as little band dielectric substrate 1 with the bilateral antenna of the direction radiation of little band dielectric substrate 1 parallel (array element line); feed circuit 2; balanced-unbalanced transformer 7 and at least two secondary oscillators 3; element spacing is 1/2nd operation wavelengths; antenna is by coaxial cable 5 direct feeds; its feeder cable is identical with embodiment 1 with the method for attachment of antenna input; antenna places within the protection of radome, the feed circuit 2 on little band dielectric substrate 1; radiating element 3; T shape merit divides 6; balanced-unbalanced transformer 7 as shown in Figure 8.
Claims (5)
1. bidirectional multi-frequency integrated antenna that in communication system, uses, comprise dielectric substrate (1), it is characterized in that being respectively equipped with microstrip transmission line (21) on two surfaces of dielectric substrate (1), little band ground (22) and at least two doublet antennas (3), little band ground (22) that one end of microstrip transmission line (21) reaches homonymy one end corresponding with it is connected with coaxial feeder cables, little band ground of the other end of microstrip transmission line (21) and homonymy one end corresponding with it is connected with the uneven input port (8) of T-branch (6), T-branch (6) is made up of the T-branch that has transition line of microstrip transmission line T-branch and little band ground one side, the T-branch of little band ground one side has comprised the transition line balanced-unbalanced transformer (7) of balanced-unbalanced change action, a doublet antenna (31 in above-mentioned per two doublet antennas, 32) be connected with the balance output port (9) of T-branch (6), another doublet antenna is connected with another balance output port (9) of T-branch (6), a pair of oscillator arms of forming doublet antenna lay respectively on two surfaces of dielectric substrate (1) and respectively with the balance output (91 that is positioned at (1) two lip-deep two T-branch of dielectric substrate, 92) connect.
2. bidirectional multi-frequency integrated antenna according to claim 1 it is characterized in that dielectric substrate (1) stands on the metal ground (4), and little band ground (22) is connected with metal ground (4).
3. bidirectional multi-frequency integrated antenna according to claim 1 and 2, the two ends that it is characterized in that described transition line balanced-unbalanced transformer (7) are connected with the imbalance end of the T-branch of little band ground one side and the oscillator of doublet antenna respectively.
4. bidirectional multi-frequency integrated antenna according to claim 1 and 2, it is characterized in that described transition line balanced-unbalanced transformer (7) is located at place, the little band ground corresponding with microstrip transmission line (21), the two ends of transition line balanced-unbalanced transformer (7) are connected respectively with corresponding to little band ground (22) of the same side of microstrip transmission line (21) one ends and the T-branch that is positioned at little band ground (22) other end.
5. bidirectional multi-frequency integrated antenna according to claim 1 and 2 is characterized in that being provided with on microstrip transmission line (21) tuning (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100403845A CN1851981B (en) | 2006-05-19 | 2006-05-19 | Bidirectional multi-frequency integrated antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100403845A CN1851981B (en) | 2006-05-19 | 2006-05-19 | Bidirectional multi-frequency integrated antenna |
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| Publication Number | Publication Date |
|---|---|
| CN1851981A CN1851981A (en) | 2006-10-25 |
| CN1851981B true CN1851981B (en) | 2010-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006100403845A Expired - Fee Related CN1851981B (en) | 2006-05-19 | 2006-05-19 | Bidirectional multi-frequency integrated antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545609A (en) * | 2013-11-06 | 2014-01-29 | 中国计量学院 | Tree-form branch structure three-frequency-band antenna |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710652B (en) * | 2008-11-05 | 2013-01-23 | 广东通宇通讯股份有限公司 | Integrated wide-band bilateral radiating antenna |
| CN104518279A (en) * | 2013-09-30 | 2015-04-15 | 西门子（中国）有限公司 | Bidirectional antenna, wireless access point and train control system |
| CN105206928B (en) * | 2015-10-12 | 2018-06-12 | 林伟 | The aerial array of wideband |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5293175A (en) * | 1991-07-19 | 1994-03-08 | Conifer Corporation | Stacked dual dipole MMDS feed |
| US6037911A (en) * | 1997-06-30 | 2000-03-14 | Sony International (Europe) Gmbh | Wide bank printed phase array antenna for microwave and mm-wave applications |
| CN2501193Y (en) * | 2001-08-23 | 2002-07-17 | 西安海天天线科技股份有限公司 | Ultra-wide band indoor omnidirectional ceiling aerial |
| CN1362754A (en) * | 2000-12-31 | 2002-08-07 | 富士康(昆山)电脑接插件有限公司 | Printed microstrip dipole antenna |
| CN2893958Y (en) * | 2006-05-19 | 2007-04-25 | 东南大学 | Bidirectional multifrequency multimode integrated antenna |
-
2006
- 2006-05-19 CN CN2006100403845A patent/CN1851981B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5293175A (en) * | 1991-07-19 | 1994-03-08 | Conifer Corporation | Stacked dual dipole MMDS feed |
| US6037911A (en) * | 1997-06-30 | 2000-03-14 | Sony International (Europe) Gmbh | Wide bank printed phase array antenna for microwave and mm-wave applications |
| CN1362754A (en) * | 2000-12-31 | 2002-08-07 | 富士康(昆山)电脑接插件有限公司 | Printed microstrip dipole antenna |
| CN2501193Y (en) * | 2001-08-23 | 2002-07-17 | 西安海天天线科技股份有限公司 | Ultra-wide band indoor omnidirectional ceiling aerial |
| CN2893958Y (en) * | 2006-05-19 | 2007-04-25 | 东南大学 | Bidirectional multifrequency multimode integrated antenna |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545609A (en) * | 2013-11-06 | 2014-01-29 | 中国计量学院 | Tree-form branch structure three-frequency-band antenna |
| CN103545609B (en) * | 2013-11-06 | 2016-03-02 | 中国计量学院 | Tree-form branch structure three-frequency-band antenna |
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| Publication number | Publication date |
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| CN1851981A (en) | 2006-10-25 |
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