CN204361265U - Double-frequency antenna unit - Google Patents
Double-frequency antenna unit Download PDFInfo
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- CN204361265U CN204361265U CN201520081317.2U CN201520081317U CN204361265U CN 204361265 U CN204361265 U CN 204361265U CN 201520081317 U CN201520081317 U CN 201520081317U CN 204361265 U CN204361265 U CN 204361265U
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Abstract
Disclose a kind of double-frequency antenna unit, it is characterized in that, comprise medium substrate and be positioned at the irradiation structure of first surface of medium substrate, irradiation structure comprises: the first radiation component, comprise the first radiation arm and two the first radiation branch, first radiation arm is square shape, and two the first radiation branch stretch out in the same direction respectively from adjacent two ends of the first radiation arm; And second radiation component, comprise the second radiation arm and two the second radiation branch, the second radiation arm is square shape, and two the second radiation branch stretch out in the same direction respectively from adjacent two ends of the second radiation arm; Wherein, the bearing of trend of the first radiation branch is contrary with the bearing of trend of the second radiation branch.This double-frequency antenna unit utilizes the design of irradiation structure to achieve two operating frequencies, can reduce antenna size further and improve antenna gain when adopting Metamaterial dielectric substrate.
Description
Technical field
The utility model relates to antenna technical field, relates more specifically to double-frequency antenna unit.
Background technology
Growing along with wireless communication technology, needs to carry out multiple different frequency range communication in wireless telecommunications electronic equipment simultaneously.Existing wireless telecommunications electronic equipment generally adopts many radio-frequency antennas, is respectively used to different frequency ranges.But the performance suffers of antenna is in the size of antenna.If the reduction of antenna size, then the electrical length of antenna reduces, and antenna radiation efficiency and operating frequency are changed.
Dual-band antenna utilizes specific irradiation structure to realize the resonance of two frequency ranges, thus can meet the communication need of two frequency ranges.Due to the minimizing of antenna amount, the size of antenna assembly therefore can be reduced.Further, the size and the raising antenna efficiency that reduce dual-band antenna self is expected.
Utility model content
The purpose of this utility model is to provide a kind of double-frequency antenna unit that can reduce own dimensions and improve antenna efficiency.
According to one side of the present utility model, a kind of double-frequency antenna unit is provided, it is characterized in that, comprise medium substrate and be positioned at the irradiation structure of first surface of described medium substrate, described irradiation structure comprises: the first radiation component, comprise the first radiation arm and two the first radiation branch, described first radiation arm is square shape, and described two the first radiation branch stretch out in the same direction respectively from adjacent two ends of described first radiation arm; And second radiation component, comprise the second radiation arm and two the second radiation branch, described second radiation arm is square shape, and described two the second radiation branch stretch out in the same direction respectively from adjacent two ends of described second radiation arm; Wherein, the bearing of trend of described first radiation branch is contrary with the bearing of trend of described second radiation branch.
Preferably, described first radiation arm comprises first side and the second side of horizontal expansion, and the 3rd side and four side of longitudinal extension, wherein, described first side, described 3rd side, described second side and described four side order join end to end, successively to form square shape and centre comprises the first rectangular apertures.
Preferably, described second radiation arm comprises the 5th side and the 6th side of horizontal expansion, and the heptalateral limit of longitudinal extension and the 8th side, wherein, described 5th side, described heptalateral limit, described 6th side and described 8th side order join end to end, successively to form square shape and centre comprises the second rectangular apertures.
Preferably, described first radiation component also comprises the first radiant panel of the second surface being positioned at described medium substrate, described second radiation component also comprises the second radiant panel of the second surface being positioned at described medium substrate, wherein, the first surface of described medium substrate is relative with second surface and be parallel to each other.
Preferably, described first radiant panel and described second radiant panel are respectively rectangle, and the projection of described first radiant panel on the first surface of described medium substrate and described first rectangular apertures match, the projection of described second radiant panel on the first surface of described medium substrate and described second rectangular apertures match.
Preferably, the first radiation component of described irradiation structure and the second radiation component are mutually symmetrical.
Preferably, described irradiation structure is formed by the metal level of patterning, or is formed by electrically conductive ink printing.
Preferably, the component of described medium substrate comprises glass-fiber-fabric, epoxy resin, and with the compound of described epoxy resin generation cross-linking reaction.
Preferably, described medium substrate comprises at least one stacking first lamella and the second lamella, the surface of close second lamella of each at least one first lamella described forms man-made microstructure, and on the surface of the first lamella, described irradiation structure is formed on the second lamella, by described second lamella, described man-made microstructure and described irradiation structure to be kept apart.
Preferably, the first side of described first radiation arm close to each other with the 5th side of described second radiation arm and parallel relatively, and described first side and described 5th side middle part are separately provided with distributing point, the extending end portion of described first radiation branch and the extending end portion of described second radiation branch close to each other and facing each other.
The utility model forms the irradiation structure of dipole antenna on medium substrate.Because radiation component comprises the first and second radiation arms of square shape and the first and second radiation branch of strip.By regulating the length of the length of the first radiation arm and the second radiation arm, two the first radiation branch and two the second radiation branch, dual frequency radiation characteristic can be realized.Therefore, two-frequency operation can be realized in an antenna assembly.Adopt the radiation arm of square shape, can broadband performance be realized.In a preferred embodiment, this double-frequency antenna unit adopts Metamaterial dielectric substrate, can reduce antenna size further and improve antenna gain.This double-frequency antenna unit is applicable to household radio InterWorking Equipment, such as router, Set Top Box etc.
Accompanying drawing explanation
By referring to the description of accompanying drawing to the utility model embodiment, above-mentioned and other objects of the present utility model, feature and advantage will be more clear, in the accompanying drawings:
Fig. 1 a and 1b is the structural upright schematic diagram watched from different directions according to double-frequency antenna unit of the present utility model;
Fig. 2 is the structural upright schematic diagram of the medium substrate adopted in double-frequency antenna unit;
Fig. 3 is the curve chart of reflection coefficient S11 with frequency change of double-frequency antenna unit;
Fig. 4 is the curve chart of voltage standing wave ratio with frequency change of double-frequency antenna unit;
Fig. 5 is the antenna pattern of double-frequency antenna unit at 2450MHz;
Fig. 6 is the antenna pattern of double-frequency antenna unit at 5800MHz.
Embodiment
Below in conjunction with accompanying drawing, several preferred embodiment of the present utility model is described in detail, but the utility model is not restricted to these embodiments.The utility model contain any make in spirit and scope of the present utility model substitute, amendment, equivalent method and scheme.
To have the utility model to make the public and understand thoroughly, in following the utility model preferred embodiment, describe concrete details in detail, and do not have the description of these details also can understand the utility model completely for a person skilled in the art.
Fig. 1 a and 1b is the structural upright schematic diagram according to double-frequency antenna unit of the present utility model, and wherein Fig. 1 a illustrates the schematic perspective view from top viewing, and Fig. 1 b illustrates the schematic perspective view watched from below.Double-frequency antenna unit comprises medium substrate 100, is positioned at irradiation structure 200 and the feed line 300 of a side surface of medium substrate 100.The component of medium substrate 100 comprises glass-fiber-fabric, epoxy resin and the compound with described epoxy resin generation cross-linking reaction.Irradiation structure 200 is such as formed by the metal level of patterning, or is 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.Feed line 300 is such as coaxial line, for the dipole FD feed to irradiation structure 200.
Irradiation structure 200 comprises the first radiation component and the second radiation component that are mutually symmetrical.First radiation component comprises the first radiation arm 211 and two the first radiation branch 212 and 213.Two the first radiation branch 212 and 213 stretch out in the same direction respectively from adjacent two ends of the first radiation arm 211.Second radiation component comprises the second radiation arm 221 and two the second radiation branch 222 and 223.Two the second radiation branch 222 and 223 stretch out in the same direction respectively from adjacent two ends of the second radiation arm 221.The extending end portion of two the first radiation branch 212 and 213 and the extending end portion of two the second radiation branch 222 and 223 close to each other and facing each other.
First radiation arm 211 and the second radiation arm 221 are square shape separated from one another.First radiation arm 211 comprises the first side of horizontal expansion and the 3rd side and four side of second side and longitudinal extension, wherein, first side, the 3rd side, second side and four side order join end to end, successively to form square shape and centre comprises the first rectangular apertures.Second radiation arm 221 comprises the 5th side of horizontal expansion and the heptalateral limit of the 6th side and longitudinal extension and the 8th side, wherein, 5th side, heptalateral limit, the 6th side and the 8th side order join end to end, successively to form square shape and centre comprises the second rectangular apertures.Two the first radiation branch 212 and 213 are respectively strip, from the 3rd side of the first radiation arm 211 and the end longitudinal extension of four side.Two the second radiation branch 222 and 223 are respectively strip, from the heptalateral limit of the second radiation arm 221 and the end longitudinal extension of the 8th side.First radiation branch 212 is relative with the end of the second radiation branch 222, and the first radiation branch 213 is relative with the end of the second radiation branch 223.
The first side of the first radiation arm 211 close to each other with the 5th side of the second radiation arm 221 and parallel relatively, and described first side and described 5th side middle part are separately provided with distributing point.Feed line 300 connects the distributing point of the first radiation arm 211 and the second radiation arm 221 respectively.
In the present embodiment, when the length of antenna is 1/2 of electromagnetic wave signal wavelength, the transmitting and receiving of antenna are most effective.The length of antenna is the length sum of the first radiation arm 211 and the second radiation arm 221.Therefore, when the first radiation arm 211 and the respective length of the second radiation arm 221 are 1/4 of electromagnetic wave signal wavelength, the transmitting and receiving of antenna are most effective.Adopt the radiation arm of square shape, can broadband performance be realized.
In double-frequency antenna unit, the response of the length major effect antenna low-frequency range of the first radiation arm 211 and the second radiation arm 221.The response of the length major effect antenna high band of two the first radiation branch 212 and 213 and two the second radiation branch 222 and 223.Therefore, by regulating the length of the length of the first radiation arm 211 and the second radiation arm 221, two the first radiation branch 212 and 213 and two the second radiation branch 222 and 223, dual frequency radiation characteristic can be realized.
In a preferred embodiment, first radiant panel 215, second radiation component corresponding with the first radiation arm 211 that first radiation component also comprises the second surface being positioned at medium substrate 100 also comprises second radiant panel 225 corresponding with the second radiation arm 221 of the second surface being positioned at medium substrate 100.First radiant panel 215 and the second radiant panel 225 are respectively rectangle.The size of the first radiant panel 215 is corresponding with the opening of the first radiation arm 211 with position, and the size of the second radiant panel 225 is corresponding with the opening of the second radiation arm 221 with position.Also be, the first rectangular apertures that four sides of the projection of the first radiant panel 215 on the first surface of medium substrate and the first radiation arm 211 surround matches, and the second rectangular apertures that four sides of the projection of the second radiant panel 225 on the first surface of medium substrate and the second radiation arm 221 surround matches.
Fig. 2 is the structural upright schematic diagram of the medium substrate adopted in double-frequency antenna unit.In this preferred embodiment, medium substrate 100 is metamaterial substrate, comprises the lamination of the first lamella 110 and the second lamella 120, and is positioned at the man-made microstructure 130 on the surface of the first lamella 110.
This medium substrate 100 designs based on artificial electromagnetic material principle art.Artificial electromagnetic material refers to the topological metal structure of sheet metal being engraved into given shape, and the topological metal structure of described given shape being arranged at the extraordinary electromagnetic material of the equivalence of processing and manufacturing on certain dielectric constant and magnetic permeability base material, its performance parameter depends primarily on the topological metal structure of the given shape of its sub-wavelength.
First lamella 110 is attached with the man-made microstructure 130 of different graphic and physical dimension to realize absorbing the electromagnetic wave of different frequency section.Second lamella 120 covers man-made microstructure 130, and provides support for irradiation structure 200.First lamella 110 and the second lamella 120 can be obtained by macromolecular material, ceramic material, ferroelectric material, ferrite material or ferromagnetic material respectively, and wherein macromolecular material can adopt polytetrafluoroethylene, FR4 or F4B etc.
Man-made microstructure 130 can adopt the topological structure had electric field response, and as " work " font, " ten " font or " H " shape and its derived structure, embodiment illustrated in fig. 2 is the man-made microstructure 130 of " work " font.Adopt the man-made microstructure of suitable dimension and pattern, negative magnetoconductivity and negative permittivity can be realized in medium substrate 100, thus utilize Metamaterial dielectric substrate reduce antenna size and improve antenna gain.
In a particular embodiment, man-made microstructure 130 is made up of wires such as at least one copper wire or filamentary silvers, has special pattern.Metal wire is attached on the first lamella 110 by etching, plating, the multiple methods such as quarters, photoetching, electronics quarter or ion quarter of boring.Wherein, etching is preferably manufacturing process, its step is after the plane pattern designing suitable man-made microstructure, first a tinsel is integrally attached on the first lamella 110, then etching machines is passed through, the chemical reaction of solvent and metal is utilized to get rid of foil parts beyond man-made microstructure predetermined pattern, the remaining man-made microstructure that can obtain array arrangement.
In the above-described embodiment, a surface of the first lamella 110 forms man-made microstructure 130, and the second lamella 120 is as separator.In an alternative embodiment, can form man-made microstructure on two surfaces of the first lamella 110, the second lamella 120 is as separator.In the embodiment that another substitutes, man-made microstructure can be formed on a surface of the first lamella 110, form the irradiation structure of antenna assembly on the other surface, thus not need the second lamella 120 of adding.In the embodiment that other substitute, can stacking multiple first lamella 110, a surface of each the first lamella 110 forms man-made microstructure.According to the design needs of antenna, the pattern of the man-made microstructure of each aspect, distribution and size can be identical or different.
If man-made microstructure adopts PCB structural design to shorten process time, reduce production cost, ensure antenna consistency.
Fig. 3 is the curve chart of reflection coefficient S11 with frequency change of double-frequency antenna unit, and Fig. 4 is the curve chart of voltage standing wave ratio with frequency change of double-frequency antenna unit.Composition graphs 3 and 4 can be found out, this double-frequency antenna unit reflection coefficient S11 under 2.4-2.48GHz and 4.9-5.85GHz two working frequency range is all less than-10dB, and voltage standing wave ratio is all less than 2.This shows that this antenna assembly has less return loss and good matching effect under two frequency ranges, can receive small-signal well.
Fig. 5 is the antenna pattern of double-frequency antenna unit at 2450MHz.Fig. 6 is the antenna pattern of double-frequency antenna unit at 5800MHz.Antenna pattern refers at the figure changed with direction from the relative field strength (normalization modulus value) of antenna a distance radiation field.As can be seen from Fig. 5 and 6, this antenna assembly has good directional diagram at two working frequency range.The antenna gain of this antenna assembly significantly improves relative to traditional antenna, and directivity is improved, thus improves antenna radiation efficiency.
In the present embodiment, as shown in table 1 below by choosing voltage standing wave ratio, reflection coefficient S11 and gain data that this double-frequency antenna unit of multiple frequency (as 2400MHz, 2500MHz, 4900MHz, 5300MHz, 5500MHz, 5850MHz) actual measurement obtains under respective frequency:
Table 1. voltage standing wave ratio VSWR at different frequencies, S11 value and gain
According to embodiment of the present utility model as described above, these embodiments do not have all details of detailed descriptionthe, do not limit the specific embodiment that this utility model is only described yet.Obviously, according to above description, can make many modifications and variations.This specification is chosen and is specifically described these embodiments, is to explain principle of the present utility model and practical application better, thus makes art technical staff that the utility model and the amendment on the utility model basis can be utilized well to use.The utility model is only subject to the restriction of claims and four corner and equivalent.
Claims (10)
1. a double-frequency antenna unit, is characterized in that, comprise medium substrate and be positioned at the irradiation structure of first surface of described medium substrate, described irradiation structure comprises:
First radiation component, comprise the first radiation arm and two the first radiation branch, described first radiation arm is square shape, and described two the first radiation branch stretch out in the same direction respectively from adjacent two ends of described first radiation arm; And
Second radiation component, comprise the second radiation arm and two the second radiation branch, described second radiation arm is square shape, and described two the second radiation branch stretch out in the same direction respectively from adjacent two ends of described second radiation arm;
Wherein, the bearing of trend of described first radiation branch is contrary with the bearing of trend of described second radiation branch.
2. double-frequency antenna unit according to claim 1, it is characterized in that, described first radiation arm comprises first side and the second side of horizontal expansion, and the 3rd side and four side of longitudinal extension, wherein, described first side, described 3rd side, described second side and described four side order join end to end, successively to form square shape and centre comprises the first rectangular apertures.
3. double-frequency antenna unit according to claim 2, it is characterized in that, described second radiation arm comprises the 5th side and the 6th side of horizontal expansion, and the heptalateral limit of longitudinal extension and the 8th side, wherein, described 5th side, described heptalateral limit, described 6th side and described 8th side order join end to end, successively to form square shape and centre comprises the second rectangular apertures.
4. double-frequency antenna unit according to claim 3, it is characterized in that, described first radiation component also comprises the first radiant panel of the second surface being positioned at described medium substrate, described second radiation component also comprises the second radiant panel of the second surface being positioned at described medium substrate, wherein, the first surface of described medium substrate is relative with second surface and be parallel to each other.
5. double-frequency antenna unit according to claim 4, it is characterized in that, described first radiant panel and described second radiant panel are respectively rectangle, and the projection of described first radiant panel on the first surface of described medium substrate and described first rectangular apertures match, the projection of described second radiant panel on the first surface of described medium substrate and described second rectangular apertures match.
6. the double-frequency antenna unit according to any one of claim 1-5, is characterized in that, the first radiation component and second radiation component of described irradiation structure are mutually symmetrical.
7. the double-frequency antenna unit according to any one of claim 1-5, is characterized in that, described irradiation structure is formed by the metal level of patterning, or is formed by electrically conductive ink printing.
8. the double-frequency antenna unit according to any one of claim 1-5, is characterized in that, the component of described medium substrate comprises glass-fiber-fabric, epoxy resin, and with the compound of described epoxy resin generation cross-linking reaction.
9. double-frequency antenna unit according to claim 1, it is characterized in that, described medium substrate comprises at least one stacking first lamella and the second lamella, the surface of close second lamella of each at least one first lamella described forms man-made microstructure, and on the surface of the first lamella, described irradiation structure is formed on the second lamella, by described second lamella, described man-made microstructure and described irradiation structure to be kept apart.
10. double-frequency antenna unit according to claim 3, it is characterized in that, the first side of described first radiation arm close to each other with the 5th side of described second radiation arm and parallel relatively, and described first side and described 5th side middle part are separately provided with distributing point, the extending end portion of described first radiation branch and the extending end portion of described second radiation branch close to each other and facing each other.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520081317.2U CN204361265U (en) | 2015-02-04 | 2015-02-04 | Double-frequency antenna unit |
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| CN201520081317.2U CN204361265U (en) | 2015-02-04 | 2015-02-04 | Double-frequency antenna unit |
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| CN204361265U true CN204361265U (en) | 2015-05-27 |
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Owner name: SHENZHEN GUANGQI INTELLIGENT PHOTONICS TECHNOLOGY Free format text: FORMER OWNER: SHENZHEN KUANG-CHI INNOVATION TECHNOLOGY CO., LTD. Effective date: 20150701 |
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Effective date of registration: 20150701 Address after: 518000 Guangdong city of Shenzhen province Futian District Shennan Road and CaiTian Road intersection East Xintiandi Plaza C block 2007-27 Patentee after: Shenzhen Guang Qi intelligent photonic Technology Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Futian District Shennan Road and CaiTian Road intersection East Xintiandi Plaza C block 2007-27 Patentee before: Shenzhen Kuang-Chi Innovation Technology Co., Ltd. |
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Effective date of registration: 20210330 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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