CN204614948U - Antenna assembly and wireless bridging system - Google Patents
Antenna assembly and wireless bridging system Download PDFInfo
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- CN204614948U CN204614948U CN201520352458.3U CN201520352458U CN204614948U CN 204614948 U CN204614948 U CN 204614948U CN 201520352458 U CN201520352458 U CN 201520352458U CN 204614948 U CN204614948 U CN 204614948U
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Abstract
Disclose a kind of antenna assembly and wireless bridging system.Multiple dipole antennas that described antenna assembly comprises reflecting plate, is positioned at the medium substrate above reflecting plate and arranges in the dielectric substrate, the structure of wherein said multiple dipole antenna is identical, and any two dipole antennas adjacent in described multiple dipole antenna each other orientation be staggeredly arranged, make cross polarization each other between described adjacent any two dipole antennas.This antenna assembly utilizes the design of irradiation structure to realize MIMO structure and directed radiation, and utilizes the design of the different orientation of multiple radiating antenna to improve isolation between antennae.This antenna assembly compact dimensions, can be built in AP equipment, thus can reduce the installation and maintenance cost of wireless bridging system, improves reliability and antenna performance.
Description
Technical field
The utility model relates to antenna technical field, is specifically related to a kind of antenna assembly and wireless bridging system.
Background technology
Existing car over the ground wireless bridging system comprises setting access point ON TRAINS (AP) equipment and orthotype antenna.AP equipment is connected to orthotype antenna by multi-channel rf wire jumper, realizes multichannel and receives and dispatches simultaneously, and adopts 802.11AC agreement wirelessly transmitting data.But owing to being subject to the restriction of driver's cabin installing space, the installation site between AP equipment and antenna is distant, force radio frequency wire jumper cable run distance long.The cabling of multi-channel rf wire jumper not only causes the installation and maintenance inconvenience of antenna bridge system, and produces additional line loss, causes the radiated signal strength of antenna to be deteriorated, does not reach the ideal effect of design.
In recent years, multiple-input and multiple-output (MIMO) technology utilizes many antennas to send and Received signal strength, obtains increasing application in wireless communications.MIMO technology can improve capacity and the frequency range utilization ratio of communication system without increase in bandwidth, from but improve the important means of message transmission rate.Existing electronic equipment generally adopts many radio-frequency antennas to be respectively used to different passages.
Expect orthotype mimo antenna to be applied to car wireless bridging system be built-inly integrated in AP equipment over the ground, to reduce system installation and maintenance cost, improve reliability and antenna performance.
Utility model content
In view of this, the utility model proposes a kind of antenna assembly and wireless bridging system, wherein antenna assembly can be designed to built-in directional antenna, decrease dress maintenance cost and reduce fault occurrence probability and improving performance.
According to one side of the present utility model, a kind of antenna assembly is provided, described antenna assembly comprises: reflecting plate, be arranged in the medium substrate above described reflecting plate and be arranged on multiple dipole antennas of described medium substrate, the structure of wherein said multiple dipole antenna is identical, and any two dipole antennas adjacent in described multiple dipole antenna each other orientation be staggeredly arranged, make cross polarization each other between described adjacent any two dipole antennas.
Preferably, described medium substrate comprises relative first surface and second surface, each Department of Radiation including the first surface being positioned at described medium substrate in described multiple dipole antenna and the grounding parts be positioned on second surface.
Preferably, described Department of Radiation comprises the radiation arm and the first radiation branch extended from the two ends of described radiation arm along second direction respectively and the second radiation branch that first direction extends.
Preferably, described grounding parts comprises the grounding arm extended along described first direction and the first ground connection branch extended from the two ends of described grounding arm along third direction respectively and the second ground connection branch, wherein, described second direction is vertical with described first direction, and described second direction is contrary with described third direction.
Preferably, the mid point of described radiation arm connects feed line, and the mid point of described grounding arm connects earth connection, and described medium substrate is provided with through hole, passes for described feed line or described earth connection.
Preferably, described first radiation branch and described second radiation branch symmetrical.
Preferably, described first ground connection branch and described second ground connection branch are symmetrical, and symmetry axis is identical with the symmetry axis between described first radiation branch and described second radiation branch.
Preferably, described medium substrate is rounded, and described multiple dipole antenna quantity is 3.
Preferably, the position that these 3 dipole antennas are placed makes the circle of described medium substrate be divided into 3 parts, and the angle between two dipole antennas making arbitrary neighborhood is 120 degree.
Preferably, described reflecting plate is rounded, and the projection of the center of circle on described medium substrate overlaps with the center of circle of described medium substrate.
Preferably, the projection of Department of Radiation described in each dipole antenna on the second surface of described medium substrate and described grounding parts symmetrical.
Preferably, the length of described first radiation branch, described second radiation branch, described first ground connection branch, described second ground connection branch is respectively 1/4 λ, and wherein λ is the wavelength of working frequency range.
Preferably, the length of described radiation arm and described grounding arm is respectively 2/5 λ, and wherein λ is the wavelength of working frequency range.
Preferably, described reflecting plate comprises reflecting surface, and described reflecting surface is made up of electric conducting material, and relative with the second surface of described medium substrate.
Preferably, the distance between the reflecting surface of described reflecting plate and the second surface of described medium substrate is more than or equal to 1/8 λ and is less than or equal to 1/4 λ, and wherein λ is the wavelength of working frequency range.
Preferably, described reflecting plate be arbitrary shape, the maximum length and width of its size are all greater than 3/4 λ, and λ is the wavelength of working frequency range.
Preferably, described reflecting plate is common metal plate, medium covers one in copper metallic plate, plastic cement plated metal plate.
Preferably, described Department of Radiation and described grounding parts are formed by the metal level of patterning, or are formed by electrically conductive ink printing.
Preferably, the working frequency range of described antenna assembly is 5.15GHz ~ 5.85GHz.
According to another aspect of the present utility model, provide a kind of wireless bridging system, comprise above-mentioned antenna assembly.
This antenna assembly utilizes the design of irradiation structure to realize MIMO structure and directed radiation, and utilizes the design of the different orientation of multiple radiating antenna to improve isolation between antennae.This antenna assembly compact dimensions, can be built in AP equipment, thus can reduce the installation and maintenance cost of wireless bridging system, improves reliability and antenna performance.
Accompanying drawing explanation
By referring to the description of accompanying drawing to the utility model embodiment, above-mentioned and other objects, features and advantages of the present utility model will be more clear, in the accompanying drawings:
Fig. 1 a-1b illustrates three-dimensional view according to the embodiment of antenna assembly of the present utility model and front view;
Fig. 2 a-2b illustrates three-dimensional view, the top view of the embodiment of the dipole antenna according to antenna assembly of the present utility model;
Fig. 3 illustrates according to the VSWR parameter value of the antenna assembly of the present utility model curve chart with frequency change;
Fig. 4 illustrates according to the S parameter value of the antenna assembly of the present utility model curve chart with frequency change;
Fig. 5 a-5b illustrates the directional diagram according to antenna assembly of the present utility model.
Embodiment
Based on embodiment, the utility model is described below, but the utility model is not restricted to these embodiments.In hereafter details of the present utility model being described, detailedly describe some specific detail sections.Do not have the description of these detail sections can understand the utility model completely for a person skilled in the art yet.In order to avoid obscuring essence of the present utility model, known method, process, flow process, element and circuit do not describe in detail.In addition, it should be understood by one skilled in the art that the accompanying drawing provided at this is all for illustrative purposes, and accompanying drawing is not necessarily drawn in proportion.
Unless the context clearly requires otherwise, similar words such as " comprising ", " comprising " otherwise in whole specification and claims should be interpreted as the implication that comprises instead of exclusive or exhaustive implication; That is, be the implication of " including but not limited to ".In description of the present utility model, it is to be appreciated that term " first ", " second " etc. are only for describing object, and instruction or hint relative importance can not be interpreted as.In addition, in description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more.
Fig. 1 a-1b illustrates three-dimensional view according to the embodiment of antenna assembly of the present utility model and front view.This antenna assembly comprises: medium substrate 200, the first dipole antenna 110, second dipole antenna 120, the 3rd dipole antenna 130 and the reflecting plate 300 be positioned on medium substrate 200.
Reflecting plate 300 is circular, and reflecting plate 300 comprises the reflecting surface 300a be made up of electric conducting material.Preferably, reflecting surface 300a is made up of conductive metallic material.In the present embodiment, reflecting plate 300 is selected from common metal plate, medium covers copper metallic plate, one of plastic electroplating metallic plate.Reflecting plate 300 can be any geometric figure, and the maximum length and width of its size are all greater than 3/4 λ, and λ is the wavelength of working frequency range.Reflecting surface 300a is for reflecting the electromagnetic wave of this antenna assembly.This electromagnetic wave refers to the electromagnetic wave that this antenna assembly is launched or the electromagnetic wave that this antenna assembly receives.
Medium substrate 200 is circular, and the projection of the center of circle on medium substrate of reflecting plate 300 overlaps with the center of circle of medium substrate 200.Medium substrate 200 is set in parallel in the reflecting surface 300a side of reflecting plate 300, and and H spaced apart between the reflecting surface 300a of reflecting plate 300.Preferably, 1/8 λ≤H≤1/4 λ.Medium substrate 200 comprises each other relative first surface 200a and second surface 200b.Further, the second surface 200b of medium substrate 200 is relative with the reflecting surface 300a of reflecting plate 300.Medium substrate 200 comprises glass-fiber-fabric, epoxy resin and the compound with described epoxy resin generation cross-linking reaction.
First dipole antenna 110, second dipole antenna 120, the 3rd dipole antenna 130 are positioned on medium substrate 200.Each dipole antenna comprises and lays respectively at the first surface 200a of medium substrate 200 and the Department of Radiation of second surface 200b and grounding parts.Department of Radiation and grounding parts are such as formed by the metal level of patterning, or are formed by electrically conductive ink printing.Metal level can be made up of the one be selected from gold, silver, copper, aluminium or iron.Preferably, metal level is made up of copper, to take into account cost and the performance of antenna.
First dipole antenna 110, second dipole antenna 120, the 3rd dipole antenna 130 each other orientation are staggeredly arranged, and make cross polarization each other between two adjacent radiating antennas, to improve the isolation between antenna.In one example, the angle of the orientation between two adjacent in the first dipole antenna 110, second dipole antenna 120, the 3rd dipole antenna 130 dipole antennas is 120 degree.In this article, the orientation of each dipole antenna is defined as the orientation of the second direction of this dipole antenna.
Fig. 2 a-2b illustrates three-dimensional view and the top view of the embodiment of the dipole antenna according to antenna assembly of the present utility model.The shape of the first dipole antenna 110, second dipole antenna 120, the 3rd dipole antenna 130 is identical with structure, hereafter for the first dipole antenna 110.In the drawings in order to clear not shown medium substrate 200.
First dipole antenna 110 comprise lay respectively at medium substrate 200 first surface 200a and second surface 200b on Department of Radiation 111 and grounding parts 112.
Department of Radiation 111 comprises the radiation arm 111a extended along first direction, and the first radiation branch 111b extended from the two ends of radiation arm 111a along second direction and the second radiation branch 111c.Wherein, the first radiation branch 111b and the second radiation branch 111c is symmetrical.Grounding parts 112 comprises the grounding arm 112a extended along first direction, and the first ground connection branch 112b to extend from the two ends of grounding arm 112a along third direction and the second ground connection branch 112c, wherein, second direction is vertical with first direction, and contrary with third direction.First ground connection branch 112b and the second ground connection branch 112c is symmetrical, and the first ground connection branch 112b is identical with the symmetry axis of the second radiation branch 111c with the first radiation branch 111b with the symmetry axis of the second ground connection branch 112c.The mid point of radiation arm 111a connects feed line, and the mid point of grounding arm 112a connects earth connection.Usual feed line and earth connection are coaxial cable, and the heart yearn of cable is feed line, and outer conductor is earth connection, and in the present embodiment, medium substrate 200 is provided with through hole, passes for feed line or earth connection.Such as cable is arranged on the first surface 200a of medium substrate 200, feed line connects the mid point (distributing point) of radiation arm 111a, earth connection is connected to the mid point (earth point) of grounding arm 112a through through hole, simplifies wiring, avoids the winding of cable.
Department of Radiation 111 and the projection of grounding parts 112 on the first surface 200a of medium substrate 200 are symmetrical, Department of Radiation 111 and grounding parts 112 has similar opening shape but opening direction is contrary.
First dipole antenna 110 comprises the first and second symmetrical conductive paths.First conductive path comprises the first radiation branch 111b, the first ground connection branch 112b, and the second conductive path comprises the second radiation branch 111c and the second ground connection branch 112.
The length L of dipole is 1/2 λ in the present embodiment, and namely the length of the first radiation branch 111b, the second radiation branch 111c, the first ground connection branch 112b, the second ground connection branch 112c is respectively L/2=1/4 λ.The width W of dipole, namely the length of radiation arm 111a and grounding arm 112a is respectively 2/5 λ.The length L of this dipole and the selection of width W can make the reception of antenna assembly and emission effciency maximize.
Fig. 3 illustrates according to the VSWR parameter value of the antenna assembly of the present utility model curve chart with frequency change.Voltage standing wave ratio (Voltage Standing Wave Ratio VSWR) reflects the height of reflection power and efficiency of transmission, as shown in Figure 3, antenna assembly of the present utility model is under the working frequency range of 5.15GHz ~ 5.85GHz, voltage standing wave ratio is less than 1.5dB, illustrates that antenna assembly of the present utility model has less return loss and higher efficiency of transmission.
Fig. 4 illustrates according to the S parameter value of the antenna assembly of the present utility model curve chart with frequency change.As shown in Figure 4, the isolation of antenna assembly of the present utility model is under the working frequency range of 5.15GHz ~ 5.85GHz, and reflection coefficient S11 is all less than-10dB, and voltage standing wave ratio is all less than 2, and isolation is less than-15dB.This shows that this antenna assembly has less return loss under working frequency range, improves the isolation between three radiating antennas.
Fig. 5 a-5b illustrates the directional diagram according to antenna assembly of the present utility model.As shown in Fig. 5 a-5b, antenna assembly maximum gain of the present utility model is the 9.7dB when frequency is 5.5GHz, and half power lobe width is 50 degree.This antenna assembly has good directional diagram at working frequency range, and shows directional characteristic.The antenna gain of this antenna assembly significantly improves relative to traditional antenna, thus improves antenna radiation efficiency.
Antenna assembly of the present utility model is by changing the moulding of dipole antenna and improving antenna direction radiance with reflecting surface combination, and the isolation between raising antenna and antenna is to reach design effect.Three tunnels of three dipole antennas are received and dispatched simultaneously and are realized wireless bridging, equipment and antenna are integrated in a shell, are set to directional antenna namely, to meet the requirement based on the Wireless Mobile Internet high speed interconnect communication of the home control network communication protocols such as IEEE802.11AC.Antenna assembly of the present utility model decreases installation and maintenance cost, reduces fault occurrence probability, improves performance, is specially adapted to the car bridge system over the ground of subway train.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, to those skilled in the art, the utility model can have various change and change.All do within spirit of the present utility model and principle any amendment, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (20)
1. an antenna assembly, it is characterized in that, comprise: reflecting plate, be arranged in the medium substrate above described reflecting plate and be arranged on multiple dipole antennas of described medium substrate, the structure of wherein said multiple dipole antenna is identical, and any two dipole antennas adjacent in described multiple dipole antenna each other orientation be staggeredly arranged, make cross polarization each other between described adjacent any two dipole antennas.
2. antenna assembly according to claim 1, it is characterized in that, described medium substrate comprises relative first surface and second surface, each Department of Radiation including the first surface being positioned at described medium substrate in described multiple dipole antenna and the grounding parts be positioned on second surface.
3. antenna assembly according to claim 2, is characterized in that, described Department of Radiation comprises the radiation arm and the first radiation branch extended from the two ends of described radiation arm along second direction respectively and the second radiation branch that first direction extends.
4. antenna assembly according to claim 3, it is characterized in that, described grounding parts comprises the grounding arm extended along described first direction and the first ground connection branch extended from the two ends of described grounding arm along third direction respectively and the second ground connection branch, wherein, described second direction is vertical with described first direction, and described second direction is contrary with described third direction.
5. antenna assembly according to claim 4, is characterized in that, the mid point of described radiation arm connects feed line, and the mid point of described grounding arm connects earth connection, and described medium substrate is provided with through hole, passes for described feed line or described earth connection.
6. antenna assembly according to claim 4, is characterized in that, described first radiation branch and described second radiation branch symmetrical.
7. antenna assembly according to claim 6, is characterized in that, described first ground connection branch and described second ground connection branch are symmetrical, and symmetry axis is identical with the symmetry axis between described first radiation branch and described second radiation branch.
8. antenna assembly according to claim 1, is characterized in that, described medium substrate is rounded, and described multiple dipole antenna quantity is 3.
9. antenna assembly according to claim 8, is characterized in that, the position that these 3 dipole antennas are placed makes the circle of described medium substrate be divided into 3 parts, and the angle between two dipole antennas making arbitrary neighborhood is 120 degree.
10. antenna assembly according to claim 9, is characterized in that, described reflecting plate is rounded, and the projection of the center of circle on described medium substrate overlaps with the center of circle of described medium substrate.
11. antenna assemblies according to claim 2, is characterized in that, the projection of Department of Radiation described in each dipole antenna on the second surface of described medium substrate and described grounding parts symmetrical.
12. antenna assemblies according to claim 4, is characterized in that, the length of described first radiation branch, described second radiation branch, described first ground connection branch, described second ground connection branch is respectively 1/4 λ, and wherein λ is the wavelength of working frequency range.
13. antenna assemblies according to claim 4, is characterized in that, the length of described radiation arm and described grounding arm is respectively 2/5 λ, and wherein λ is the wavelength of working frequency range.
14. antenna assemblies according to claim 2, it is characterized in that, described reflecting plate comprises reflecting surface, described reflecting surface is made up of electric conducting material, and relative with the second surface of described medium substrate.
15. antenna assemblies according to claim 14, is characterized in that, the distance between the reflecting surface of described reflecting plate and the second surface of described medium substrate is more than or equal to 1/8 λ and is less than or equal to 1/4 λ, and wherein λ is the wavelength of working frequency range.
16. antenna assemblies according to claim 14, is characterized in that, described reflecting plate be arbitrary shape, the maximum length and width of its size are all greater than 3/4 λ, and λ is the wavelength of working frequency range.
17. antenna assemblies according to claim 14, is characterized in that, described reflecting plate is common metal plate, medium covers copper metallic plate, one in plastic cement plated metal plate.
18. antenna assemblies according to claim 2, is characterized in that, described Department of Radiation and described grounding parts are formed by the metal level of patterning, or are formed by electrically conductive ink printing.
19. antenna assemblies according to claim 1, is characterized in that, the working frequency range of described antenna assembly is 5.15GHz ~ 5.85GHz.
20. 1 kinds of wireless bridging system, is characterized in that, comprise at least one antenna assembly as described in any one of claim 1 to 19.
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| CN201520352458.3U CN204614948U (en) | 2015-05-27 | 2015-05-27 | Antenna assembly and wireless bridging system |
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| CN201520352458.3U CN204614948U (en) | 2015-05-27 | 2015-05-27 | Antenna assembly and wireless bridging system |
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| CN204614948U true CN204614948U (en) | 2015-09-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977651A (en) * | 2016-06-28 | 2016-09-28 | 深圳前海科蓝通信有限公司 | Dual-polarization high-gain directional antenna and design method therefor |
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- 2015-05-27 CN CN201520352458.3U patent/CN204614948U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977651A (en) * | 2016-06-28 | 2016-09-28 | 深圳前海科蓝通信有限公司 | Dual-polarization high-gain directional antenna and design method therefor |
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Effective date of registration: 20210219 Address after: 2 / F, software building, No.9, Gaoxin Zhongyi Road, Nanshan District, Shenzhen City, Guangdong Province Patentee after: KUANG-CHI INSTITUTE OF ADVANCED TECHNOLOGY Address before: 518000 Guangdong, Shenzhen, Futian District, Shennan Road and colored field road intersection C East Block New World Plaza 2007-27 Patentee before: KUANG-CHI INTELLIGENT PHOTONIC TECHNOLOGY Ltd. |
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| TR01 | Transfer of patent right |