CN201392882Y - Dual-frequency antenna - Google Patents
Dual-frequency antenna Download PDFInfo
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- CN201392882Y CN201392882Y CN 200920009417 CN200920009417U CN201392882Y CN 201392882 Y CN201392882 Y CN 201392882Y CN 200920009417 CN200920009417 CN 200920009417 CN 200920009417 U CN200920009417 U CN 200920009417U CN 201392882 Y CN201392882 Y CN 201392882Y
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Abstract
The utility model relates to a dual-frequency antenna, which is characterized by comprising a substrate, a first radiator and a second radiator, wherein the substrate is provided with a first surface, a second surface and a signal feed-in hole, and the first radiator is formed on the first surface and is connected with the signal feed-in hole; the second radiator is formed on the second surface and is connected with the signal feed-in hole, and both the first radiator and the second radiator comprises at least one first radiating part and at least one second radiating part; and a first length is between the signal feed-in hole and the end of the first radiating part, and a second length is between the signal feed-in hole and the end of the second radiating part.
Description
Technical field
The utility model is relevant a kind of dual-band antenna, refers in particular to a kind of layout by printed antenna to have the dual-band antenna of preferable gain.
Background technology
Along with modern society's science and technology is constantly progressive,, make the application of WLAN form gradually, and can be widely used in dwelling house, school, office because radio communication is flourish.And the advantage of WLAN is, the user can utilize the mobile computer or the electronic product that dispose Radio Network System directly to carry out transfer of data and access, and is not subjected to the constraint of circuit.
The antenna that general electronic products is used roughly has two kinds of plane inverse F type plate aerial and unipole antennas.Because frequency bandwidth, yield value and the radiation efficiency of plane inverse F type plate aerial all are directly proportional with volume, therefore with antenna planeization and miniaturization, the frequency bandwidth of antenna and radiation efficiency all can reduce accordingly, in other words, for situation in response to electronic product complanation and miniaturization, the working band of the dual-band antenna that the plane inverse F type plate aerial is constituted is narrower, can't cover the 802.11b/g (between the about 2.4GHZ-2.8GhZ of operational frequency bands) of present wireless network and the working band of two kinds of specifications of 802.11a (the about 5.0GHZ-5.9GHZ of operational frequency bands) simultaneously.Though and unipole antenna has bigger frequency band, must possess bigger grounding parts in use, so can cause the inconvenience of assembling and the restriction of product size when being installed in the limited usage space of electronic product.
This case designer is because the disappearance of above-mentioned existing constructional device when actual using, and the accumulation individual is engaged on the related industry exploitation practice experience for many years, studies intensively, and proposes a kind of reasonable in design and effectively improve the structure of the problems referred to above finally.
The utility model content
Main purpose of the present utility model aims to provide a kind of dual-band antenna, and it has unique signal path layout, and does not need extra matching component, to reach the requirement of preferable antenna performance.Moreover, this dual-band antenna be can in be built in the electronic product, more to meet the application demand of product.
In order to achieve the above object, the utility model provides a kind of dual-band antenna, comprises: a substrate, and it has a first surface and a second surface, and this substrate is provided with a signal feed-in hole; One first radiant body, it takes shape in this first surface and is connected in this signal feed-in hole; And one second radiant body, it takes shape in this second surface and is connected in this signal feed-in hole, this first radiant body and this second radiant body all have at least one first Department of Radiation and at least one second Department of Radiation, this signal feed-in hole is one first length to the end of this first Department of Radiation, and this signal feed-in hole to the end of this second Department of Radiation is one second length.
This substrate more comprises one first minor face and one second minor face, this first radiant body is this signal feed-in hole and this formed zone of first minor face that is positioned on this first surface, and this second radiant body is this signal feed-in hole and this formed zone of second minor face that is positioned on this second surface.
This first Department of Radiation of this first radiant body is to be extended towards this first minor face by this signal feed-in hole, and bending and extend along the direction of this first minor face again makes this signal feed-in hole to the end of this first Department of Radiation of this first radiant body form this first length; This first Department of Radiation of this second radiant body is to be extended towards this second minor face by this signal feed-in hole, and bending and extend along the direction of this second minor face again makes this signal feed-in hole to the end of this first Department of Radiation of this second radiant body form this first length.
This second Department of Radiation of this first radiant body is obliquely to be extended towards this first minor face by this signal feed-in hole, bending and extend towards the direction of this first minor face again makes this signal feed-in hole to the end of this second Department of Radiation of this first radiant body form this second length; This second Department of Radiation of this second radiant body is obliquely to be extended towards this second minor face by this signal feed-in hole, bending and extend towards the direction of this second minor face again makes this signal feed-in hole to the end of this second Department of Radiation of this second radiant body form this second length.
This first Department of Radiation of this first radiant body and this first Department of Radiation of this second radiant body comprise more that all a body and extends the extension that forms by this body bending.
The width of this extension is the width greater than this body.
This first Department of Radiation of this first radiant body is near than this second Department of Radiation of this first radiant body from this first minor face; This first Department of Radiation of this second radiant body is near than this second Department of Radiation of this second radiant body from this second minor face.
This first radiant body has two first Departments of Radiation and two second Departments of Radiation, this two first Department of Radiation of this first radiant body is to be extended towards this first minor face by this signal feed-in hole, extend to two lateral bucklings and along the direction of this first minor face respectively, this two first Department of Radiation then forms the structure of similar T type again; This two second Department of Radiation of this first radiant body is to be extended to both sides by this signal feed-in hole, bending and extend again towards the direction of this first minor face, and this two second Department of Radiation then forms the structure of similar U type.
This second radiant body has two first Departments of Radiation and two second Departments of Radiation, this two first Department of Radiation of this second radiant body is to be extended towards this second minor face by this signal feed-in hole, extend to two lateral bucklings and along the direction of this second minor face respectively, this two first Department of Radiation then forms the structure of similar inverted T shape again; This two second Department of Radiation of this second radiant body is to be extended to both sides by this signal feed-in hole, bending and extend again towards the direction of this second minor face, and this two second Department of Radiation then forms the structure of similar inverted U.
This first length is the quarter-wave of 2.4GHz frequency range, and this second length is the quarter-wave of 5GHz frequency range.
As above-mentioned structure, this first radiant body is to match to receive the signal of first frequency range with first Department of Radiation of this second radiant body, and first radiant body is to match to receive the signal of second frequency range with second Department of Radiation of this second radiant body, reaching the purpose that receives two-frequency signal, and dual-band antenna of the present utility model has good antenna performance.
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 is the front view of the first surface of dual-band antenna of the present utility model;
Fig. 2 is the front view of the second surface of dual-band antenna of the present utility model;
Fig. 3 is the schematic perspective view of dual-band antenna of the present utility model;
Fig. 4 is the S11 test curve figure of dual-band antenna of the present utility model;
Fig. 5 is the Smith Chart figure of dual-band antenna of the present utility model;
Fig. 6 is the curve chart of the voltage standing wave ratio of dual-band antenna of the present utility model;
Fig. 7 and Fig. 7 A are the 2.45GHz of XY plane under the state of perpendicular polarization and the field pattern of 5.5GHz of dual-band antenna;
Fig. 8 and Fig. 8 A are the 2.45GHz of XZ plane under the state of horizontal polarization and the field pattern of 5.5GHz of dual-band antenna;
Fig. 9 and Fig. 9 A are the 2.45GHz of YZ plane under the state of horizontal polarization and the field pattern of 5.5GHz of dual-band antenna.
Wherein, Reference numeral
1 dual-band antenna
10 substrates, 100 first surfaces
101 first minor faces
102 second minor faces
103 second surfaces
11 signal feed-in holes
12 first radiant bodies
13 second radiant bodies
121,131 first Departments of Radiation
1211,1311 bodies
1212,1312 extensions
122,132 second Departments of Radiation
20 splicing ears
The SA minor axis
Embodiment
At first, see also Fig. 1 to shown in Figure 3, the utility model proposes a kind of dual-band antenna 1, this dual-band antenna 1 can be obtained preferable signal receiving feature.This dual-band antenna 1 comprises: a substrate 10, one first radiant body 12 and one second radiant body 13 are formed, and this substrate 10 is provided with a signal feed-in hole 11.Please refer to Fig. 1, it is the front view of the first surface 100 of this substrate 10; As shown in the figure, this first radiant body 12 is to take shape on this first surface 100, and this first radiant body 12 is to be connected in this signal feed-in hole 11.On the other hand, refer again to Fig. 2, it is the front view of the second surface 103 of this substrate 10; As shown in the figure, this second radiant body 13 is to take shape on this second surface 103, and this second radiant body 13 is to be connected in this signal feed-in hole 11, therefore, and by first above-mentioned radiant body 12 and cooperating of second radiant body 13 reaching preferable signal processing aspect.
In the utility model, this first radiant body 12 has at least one first Department of Radiation 121 and at least one second Department of Radiation 122; This second radiant body 13 has and first radiant body, 12 corresponding at least one first Department of Radiation 131 and at least one second Departments of Radiation 132, and this signal feed-in hole 11 to the end of this first Department of Radiation 121 is one first length, this signal feed-in hole 11 to the end of this second Department of Radiation 122 is one second length, and the condition of this first length and second length can allow this dual-band antenna 1 receive the signal of two frequency ranges.
Please refer to Fig. 1 and Fig. 2, it is a most preferred embodiment of the present utility model, and wherein, this first radiant body 12 has two first Departments of Radiation 121 and two second Departments of Radiation 122; Similarly, this second radiant body 13 has corresponding two first Departments of Radiation 131 and two second Departments of Radiation 132.But in other embodiments, only have the first single Department of Radiation 121 and second Department of Radiation 122 can have suitable excellent reception effect equally, so the following description describes with regard to the first single Department of Radiation 121 and second Department of Radiation 122 earlier.
In one embodiment, this substrate 10 is to be a rectangular circuit board, and it is the FR4 material, but does not exceed with above-mentioned; And this substrate 10 comprises one first minor face 101 and one second minor face 102, this first radiant body 12 is these signal feed-in holes 11 and these first minor face, 101 formed zones that are positioned on this first surface 100, in other words, this signal feed-in hole 11 is positioned on the geometric center of this substrate 10 (being on the mid point of minor axis SA) best, this first radiant body 12 then is positioned at the minor axis SA of this substrate 10 and zone (in brief, this first radiant body 12 is first zones that are positioned at the first surface 100 of this substrate 10) that this first minor face, 101 formed zones are surrounded; On the other hand, this second radiant body 13 is these signal feed-in holes 11 and these second minor face, 102 formed zones that are positioned on this second surface 103, that is this second radiant body 13 is second zones that are positioned at this second surface 103.
This first Department of Radiation 121 of this first radiant body 12 is to be extended towards this first minor face 101 by this signal feed-in hole 11, bending and extend again along the direction of this first minor face 101, make this signal feed-in hole 11 to the end of this first Department of Radiation 121 of this first radiant body 12 form first length, in other words, first Department of Radiation 121 of the first single radiant body 12 can be considered down the shape of L, and this first Department of Radiation 121 comprises that more a body 1211 and extends the extension 1212 that forms by these body 1211 bendings, and the width of this extension 1212 is the width greater than this body 1211.Accordingly, this first Department of Radiation 131 of this second radiant body 13 is to be extended towards this second minor face 102 by this signal feed-in hole 11, bending and extend again along the direction of this second minor face 102, make this signal feed-in hole 11 to the end of this first Department of Radiation 131 of this second radiant body 13 form first length, that is first Department of Radiation 131 of the second single radiant body 13 can be considered the shape of L, and this first Department of Radiation 131 comprises that more a body 1311 and extends the extension 1312 that forms by these body 1311 bendings, and the width of this extension 1312 is the width greater than this body 1311.And the quarter-wave that this first length is the 2.4GHz frequency range, so 131 of this first Departments of Radiation of this first Department of Radiation 121 of this first radiant body 12 and this second radiant body 13 can cooperatively interact to receive the signal of 2.4GHz frequency range.
On the other hand, this second Department of Radiation 122 of this first radiant body 12 is obliquely to be extended towards this first minor face 101 by this signal feed-in hole 11, bending and extend towards the direction of this first minor face 101 again makes this signal feed-in hole 11 to the end of this second Department of Radiation 122 of this first radiant body 12 form second length; And first Department of Radiation 121 of this first radiant body 12 than this second Department of Radiation 122 more near this first minor face 101.Accordingly, this second Department of Radiation 132 of this second radiant body 13 is obliquely to be extended towards this second minor face 102 by this signal feed-in hole 11, bending and extend again towards the direction of this second minor face 102, make this signal feed-in hole 11 to the end of this second Department of Radiation 132 of this second radiant body 13 form second length, and first Department of Radiation 131 of this second radiant body 13 than this second Department of Radiation 132 more near this second minor face 102.Therefore in addition, this second length is the quarter-wave of 5GHz frequency range, and match with this second Department of Radiation 132 of second radiant body 13 can be in order to the signal of reception 5GHz frequency range for this second Department of Radiation 122 of first radiant body 12.
By first Department of Radiation 121,131 of 13 corresponding shapings of this above-mentioned first radiant body 12 and second radiant body, and second Department of Radiation 122,132, this dual-band antenna 1 can be in order to receive the signal of 2.4GHz frequency range and 5GHz frequency range.
Refer again to Fig. 1 to Fig. 3, in most preferred embodiment of the present utility model, this first radiant body 12 has two first Departments of Radiation 121 and two second Departments of Radiation 122; Similarly, this second radiant body 13 has corresponding two first Departments of Radiation 131 and two second Departments of Radiation 132, and the layout of each above-mentioned circuit all is same as above-mentioned explanation, is not just given unnecessary details at this.Among Fig. 1,121 structures that form similar T type of this two first Department of Radiation of first radiant body 12, these two second Departments of Radiation, 122 same structures that form similar U type of first radiant body 12; Among Fig. 2,131 structures that form similar inverted T shape of this two first Department of Radiation of second radiant body 13,132 structures that form similar inverted U of this two second Department of Radiation of second radiant body 13.And among Fig. 3, a splicing ear 20 is to be inserted in this signal feed-in hole 11, and this splicing ear 20 is in order to connect other electronic installation; And in the present embodiment, the center conductor of this splicing ear 20 is to be connected in this first radiant body 12 with the transmission forward signal; And the outside netting twine of this splicing ear 20 is to be connected in this second radiant body 13 with the transmission negative-going signal.
The antenna performance of above-mentioned dual-band antenna 1 below will be described.
Please refer to Fig. 4, it is the return loss (return loss) of the S11 resolution chart of dual-band antenna 1 of the present utility model with the performance antenna, wherein this dual-band antenna 1 at the return loss of two signal frequency ranges all less than-10dB (the expression energy loss is less than 10%), for instance, when frequency was 2.5GHz, return loss was-13.10dB; And frequency is when being 5.5GHz, and return loss is-20.32dB that in other words, the impedance of this dual-band antenna 1 all meets the specification requirement of general antenna in 2.4GHz frequency range and 5GHz frequency range.
In addition, Fig. 5 then shows the Smith Chart figure of dual-band antenna 1, and its mid point 1 to the test point of point 6 representative 2.4GHz frequency ranges and 5GHz frequency range all is positioned at the dotted line scope, for example put 3 data and be (2.5GHz, 65.23 Ω, 19.50,1.242nH); Point 5 data be (5.5GHz, 46.62 Ω, 8.501 Ω, 246.0pH), in other words, show the 2.4GHz frequency range and the 5GHz frequency range of this dual-band antenna 1 all meet the specification requirement of general antenna.
Fig. 6 is the test curve of the voltage standing wave ratio (VSWR) of dual-band antenna 1 of the present utility model, and wherein less than 2 (%), for instance, when frequency was 2.5GHz, voltage standing wave ratio was 1.541 (%) to this dual-band antenna 1 in the voltage standing wave ratio of two signal frequency ranges; And frequency is when being 5.5GHz, and voltage standing wave ratio is 1.205 (%), and in other words, the voltage standing wave ratio of this dual-band antenna 1 all meets the specification requirement of general antenna in 2.4GHz frequency range and 5GHz frequency range.
Below more disclose the gain and the field pattern thereof under various polarization aspects of this dual-band antenna 1, following test result be with dual-band antenna 1 be installed on the product the actual result who records.
Please refer to table 1, Fig. 7 and Fig. 7 A, it is gain and the field pattern (only draw 2.45GHz and 5.5GHz) thereof of XY plane under the state of perpendicular polarization of dual-band antenna 1.
Table 1
| Frequency (GHz) | 2.4 | 2.45 | 2.5 | 4.9 | 5.15 | 5.25 | 5.35 | 5.5 | 5.725 | 5.825 | 5.85 |
| peak gain (dBi) | 2.32 | 2.44 | 2.07 | 4.35 | 4.18 | 3.95 | 3.69 | 3.71 | 3.16 | 3.20 | 3.07 |
Please refer to table 2, Fig. 8 and Fig. 8 A, it is gain and the field pattern (only draw 2.45GHz and 5.5GHz) thereof of XZ plane under the state of horizontal polarization of dual-band antenna 1.
Table 2
| Frequency (GHz) | 2.4 | 2.45 | 2.5 | 4.9 | 5.15 | 5.25 | 5.35 | 5.5 | 5.725 | 5.825 | 5.85 |
| peak gain (dBi) | 4.87 | 4.76 | 3.75 | 3.57 | 3.08 | 3.26 | 3.18 | 3.31 | 3.10 | 2.83 | 2.54 |
Please refer to table 3, Fig. 9 and Fig. 9 A, it is gain and the field pattern (only draw 2.45GHz and 5.5GHz) thereof of YZ plane under the state of horizontal polarization of dual-band antenna 1.
Table 3
| Frequency (GHz) | 2.4 | 2.45 | 2.5 | 4.9 | 5.15 | 5.25 | 5.35 | 5.5 | 5.725 | 5.825 | 5.85 |
| peak gain (dBi) | 2.40 | 3.33 | 2.98 | 2.61 | 3.38 | 3.75 | 3.13 | 2.37 | 2.42 | 2.59 | 2.52 |
In sum, the utlity model has following all advantage:
1, the layout of dual-band antenna of the present utility model can provide the good signal transmission characteristic, and does not need extra matching component;
2, dual-band antenna of the present utility model can be contained 2.4GHz frequency range and 5GHz frequency range simultaneously, and reaches optimal antenna gain and voltage standing wave ratio (VSWR is less than 2), gets so that this dual-band antenna has stable operating efficiency.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (10)
1, a kind of dual-band antenna is characterized in that, comprises:
One substrate, it has a first surface and a second surface, and this substrate is provided with a signal feed-in hole;
One first radiant body, it takes shape in this first surface and is connected in this signal feed-in hole;
One second radiant body, it takes shape in this second surface and is connected in this signal feed-in hole, this first radiant body and this second radiant body all have at least one first Department of Radiation and at least one second Department of Radiation, this signal feed-in hole is one first length to the end of this first Department of Radiation, and this signal feed-in hole to the end of this second Department of Radiation is one second length.
2, dual-band antenna according to claim 1, it is characterized in that: this substrate more comprises one first minor face and one second minor face, this first radiant body is this signal feed-in hole and this formed zone of first minor face that is positioned on this first surface, and this second radiant body is this signal feed-in hole and this formed zone of second minor face that is positioned on this second surface.
3, dual-band antenna according to claim 2, it is characterized in that: this first Department of Radiation of this first radiant body is to be extended towards this first minor face by this signal feed-in hole, bending and extend along the direction of this first minor face again makes this signal feed-in hole to the end of this first Department of Radiation of this first radiant body form this first length; This first Department of Radiation of this second radiant body is to be extended towards this second minor face by this signal feed-in hole, and bending and extend along the direction of this second minor face again makes this signal feed-in hole to the end of this first Department of Radiation of this second radiant body form this first length.
4, dual-band antenna according to claim 3, it is characterized in that: this second Department of Radiation of this first radiant body is obliquely to be extended towards this first minor face by this signal feed-in hole, bending and extend towards the direction of this first minor face again makes this signal feed-in hole to the end of this second Department of Radiation of this first radiant body form this second length; This second Department of Radiation of this second radiant body is obliquely to be extended towards this second minor face by this signal feed-in hole, bending and extend towards the direction of this second minor face again makes this signal feed-in hole to the end of this second Department of Radiation of this second radiant body form this second length.
5, dual-band antenna according to claim 4 is characterized in that: this first Department of Radiation of this first radiant body and this first Department of Radiation of this second radiant body comprise more that all a body and extends the extension that forms by this body bending.
6, dual-band antenna according to claim 5 is characterized in that: the width of this extension is the width greater than this body.
7, dual-band antenna according to claim 2 is characterized in that: this first Department of Radiation of this first radiant body is near than this second Department of Radiation of this first radiant body from this first minor face; This first Department of Radiation of this second radiant body is near than this second Department of Radiation of this second radiant body from this second minor face.
8, dual-band antenna according to claim 2, it is characterized in that: this first radiant body has two first Departments of Radiation and two second Departments of Radiation, this two first Department of Radiation of this first radiant body is to be extended towards this first minor face by this signal feed-in hole, extend to two lateral bucklings and along the direction of this first minor face respectively, this two first Department of Radiation then forms the structure of similar T type again; This two second Department of Radiation of this first radiant body is to be extended to both sides by this signal feed-in hole, bending and extend again towards the direction of this first minor face, and this two second Department of Radiation then forms the structure of similar U type.
9, dual-band antenna according to claim 8, it is characterized in that: this second radiant body has two first Departments of Radiation and two second Departments of Radiation, this two first Department of Radiation of this second radiant body is to be extended towards this second minor face by this signal feed-in hole, extend to two lateral bucklings and along the direction of this second minor face respectively, this two first Department of Radiation then forms the structure of similar inverted T shape again; This two second Department of Radiation of this second radiant body is to be extended to both sides by this signal feed-in hole, bending and extend again towards the direction of this second minor face, and this two second Department of Radiation then forms the structure of similar inverted U.
10, dual-band antenna according to claim 2 is characterized in that: this first length is the quarter-wave of 2.4GHz frequency range, and this second length is the quarter-wave of 5GHz frequency range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920009417 CN201392882Y (en) | 2009-03-25 | 2009-03-25 | Dual-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920009417 CN201392882Y (en) | 2009-03-25 | 2009-03-25 | Dual-frequency antenna |
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| CN201392882Y true CN201392882Y (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200920009417 Expired - Fee Related CN201392882Y (en) | 2009-03-25 | 2009-03-25 | Dual-frequency antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107965A1 (en) * | 2016-12-14 | 2018-06-21 | 深圳市道通智能航空技术有限公司 | Dual-frequency-band micro-strip antenna and unmanned aerial vehicle using same |
| CN110323576A (en) * | 2019-04-18 | 2019-10-11 | 耀登电通科技（昆山）有限公司 | phase array antenna structure |
-
2009
- 2009-03-25 CN CN 200920009417 patent/CN201392882Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107965A1 (en) * | 2016-12-14 | 2018-06-21 | 深圳市道通智能航空技术有限公司 | Dual-frequency-band micro-strip antenna and unmanned aerial vehicle using same |
| US20180233810A1 (en) * | 2016-12-14 | 2018-08-16 | Autel Robotics Co., Ltd. | Dual-band microstrip antenna and unmanned aerial vehicle using same |
| CN110323576A (en) * | 2019-04-18 | 2019-10-11 | 耀登电通科技（昆山）有限公司 | phase array antenna structure |
| CN110323576B (en) * | 2019-04-18 | 2024-03-22 | 耀登电通科技（昆山）有限公司 | Phased array antenna structure |
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Granted publication date: 20100127 Termination date: 20150325 |
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