CN101499556B - Double-frequency antenna - Google Patents
Double-frequency antenna Download PDFInfo
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- CN101499556B CN101499556B CN200810009295A CN200810009295A CN101499556B CN 101499556 B CN101499556 B CN 101499556B CN 200810009295 A CN200810009295 A CN 200810009295A CN 200810009295 A CN200810009295 A CN 200810009295A CN 101499556 B CN101499556 B CN 101499556B
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- radiant section
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- plane
- band antenna
- frequency radiation
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Abstract
The invention relates to a dual-frequency antenna, which comprises a grounding segment, a low-frequency radiation part and a high-frequency radiation part. The grounding segment comprises a connecting end and a grounding end opposite to the connecting end. The low-frequency radiation part is connected with the connecting end of the grounding segment so as to work at the low-frequency band (2400 MHz to 2500 MHz), and comprises a signal feed end. The high-frequency radiation part works at the high-frequency band (4900MHz to 5900MHz), extends outwards from the signal feed end of the low-frequency radiation part, and defines a slot opening together with the low-frequency radiation part. The slot opening is coupled with the low-frequency radiation part and the high-frequency radiation part, thereby increasing the working bandwidth of the antenna at the high-frequency band.
Description
Technical field
The invention relates to a kind of dual-band antenna, and particularly about a kind of dual-band antenna of PIFA structure.
Background technology
Present stage is applied to the notebook computer built-in aerial of WLAN (IEEE 802.11a/b/g); Main PIFA (the Planar Inverted F Antenna that adopts; Planar inverted F-shape antenna) antenna frame of pattern; Excite low-and high-frequency two resonant cavitys reaching the effect of double frequency (dual-band) respectively by the signal feed side, but because of receiving the restriction on the space, its frequency range often have not enough shortcoming.
Consult Fig. 1; It illustrates United States Patent (USP) the 6th, 812, No. 892 disclosed PIFA pattern dual-band antennas 11; It has high-frequency radiation part 12, low frequency radiation portion 13, signal feed-in part 14 and an end and connects signal feed-in part 14, and the other end is connected to the grounding parts 15 of a ground plane 10.High-frequency radiation part 12 is by the end of signal feed-in part 14 horizontal-extending left, in order to be operated in 4840MHz～5800MHz frequency range; Low frequency radiation portion 13 is by the end of signal feed-in part 14 horizontal-extending to the right, and in order to being operated in 2390MHz～2530MHz frequency range, and signal is by 141 feed-ins of the load point on the signal feed-in part 14 by coaxial transmission line 16.Yet the impedance matching frequency range of dual-band antenna 11 in high frequency band is narrower, can not meet the demand in the application.
Summary of the invention
Therefore, the object of the present invention is to provide a kind ofly to overcome the not enough shortcoming of traditional PIFA dual-band antenna frequency range, can reduce the Antenna Design cost, and project organization is simple, controls the frequency of low-and high-frequency and the dual-band antenna of frequency range easily.
So dual-band antenna of the present invention comprises a ground connection section, a low frequency radiation portion and a high-frequency radiation part.
The ground connection section comprises an opposite link and an earth terminal.
Low frequency radiation portion links to each other with the link of ground connection section, in order to being operated in a low frequency frequency range, and comprises a signal feed side.
High-frequency radiation part is in order to being operated in a high-frequency band, and is stretched out by the signal feed side of low frequency radiation portion, and defines a slotted eye jointly with low frequency radiation portion; Slotted eye coupling low frequency radiation portion and high-frequency radiation part are to be added to the frequency range of high-frequency band work.
Description of drawings
Fig. 1 illustrates the end view of the structure of traditional dual-band antenna;
Fig. 2 illustrates the stereogram of the structure of dual-band antenna according to a first advantageous embodiment of the invention;
Fig. 3 illustrates the stereogram of the structure of dual-band antenna according to a first advantageous embodiment of the invention;
Fig. 4 illustrates the sketch map of the structure of dual-band antenna according to a first advantageous embodiment of the invention;
Fig. 5 illustrates the sketch map that the current path of the low-frequency resonant of dual-band antenna according to a first advantageous embodiment of the invention distributes;
Fig. 6 illustrates the sketch map that the current path of the high-frequency resonant of dual-band antenna according to a first advantageous embodiment of the invention distributes;
Fig. 7 illustrates the sketch map that the current path of the slotted eye resonance of dual-band antenna according to a first advantageous embodiment of the invention distributes;
Fig. 8 illustrates the end view of the copper-foil conducting electricity that links to each other with grounding parts;
Fig. 9 illustrates the end view of the dependency structure of a coaxial transmission line;
Figure 10 illustrates the stereogram of the structure of dual-band antenna according to a second, preferred embodiment of the present invention;
Figure 11 illustrates the measurement result figure of the voltage standing wave ratio (VSWR) of dual-band antenna according to a second, preferred embodiment of the present invention;
Figure 12 illustrates radiation pattern (Radiation Pattern) figure of dual-band antenna according to a second, preferred embodiment of the present invention when frequency is 2437MHz; And
Figure 13 illustrates the radiation pattern figure of dual-band antenna according to a second, preferred embodiment of the present invention when frequency is 5470MHz.
The main element symbol description
2 dual-band antennas
3 ground connection sections
31 horizontal segments
32 vertical sections
33 links
34 earth terminals
4 grounding parts
42 locking parts
421 perforation
43 locking parts
431 perforation
5 low frequency radiation portions
51 first radiant sections
52 second radiant sections
53 the 3rd radiant sections
54 the 4th radiant sections
55 the 5th radiant sections
551 first line segments
552 second line segments
553 the 3rd line segments
56 signal feed sides
6 high-frequency radiation part
61 first extensions
62 second extensions
7 slotted eyes
71 first conduits
72 second conduits
8 coaxial transmission lines
81 anodes
82 negative terminals
9 notebook computers
91 positions
92 positions
93 copper-foil conducting electricities
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in two DETAILED DESCRIPTION OF THE PREFERRED of following cooperation, can clearly appear with reference to accompanying drawing.
Before the present invention is described in detail, be noted that in following description similar elements is to represent with identical numbering.
Consult Fig. 2, Fig. 3 and Fig. 4; First preferred embodiment of dual-band antenna 2 of the present invention is arranged in the notebook computer 9; The position that is provided with can be position 91 or position 92, and its primary structure comprises grounding parts 4, a low frequency radiation portion 5 and a high-frequency radiation part 6 of a ground connection section 3, a strip.
It is L shaped that ground connection section 3 generally is, and comprises a horizontal segment 31, a vertical section 32 that links to each other with horizontal segment 31, an opposite link 33 and an earth terminal 34.Link 33 is the end that horizontal segment 31 does not link to each other with vertical section 32, links to each other with low frequency radiation portion 5; Earth terminal 34 is the end that vertical section 32 does not link to each other with horizontal segment 31, link to each other with grounding parts 4, and vertical section 32 generally is vertically with grounding parts 4 and links to each other.
Low frequency radiation portion 5 is that (2400MHz～2500MHz), generally is one the 5th radiant section 55 of parallel direction (to the right) extension at one the 3rd radiant section 53 that comprises one second radiant section 52 that is generally by horizontally extending one first radiant section 51 of the link 33 outside (left) of ground connection section 3, by link 33 courts and first radiant section 51 of ground connection section 3 that vertical direction (making progress) extends, is generally that parallel direction (left) extends by the end court and first radiant section 51 of second radiant section 52, one the 4th radiant section 54 that is generally that parallel direction (make progress) extends by the end court and second radiant section 52 of the 3rd radiant section 53 by the end court and the 3rd radiant section 53 of the 4th radiant section 54 in order to be operated in a low frequency frequency range; The end on first radiant section, 51 left sides is as a signal feed side 56.
High-frequency radiation part 6 is in order to be operated in a high-frequency band (4900MHz～5900MHz); Comprise that end (the being signal feed side 56) court by first radiant section, 51 left sides generally is one first extension 61 that parallel direction (making progress) is extended with second radiant section 52, and generally be one second extension 62 that vertical direction (left) is extended with first extension 61 by the end court of first extension 61.High-frequency radiation part 6 and low frequency radiation portion 5 all are positioned at grounding parts 4 and generally are on vertical one first plane (figure does not show), and define a general L-shaped slotted eye 7 jointly, and this slotted eye 7 comprises one first conduit 71 and one second conduit 72.First conduit 71 generally is vertically, and between first extension 61 and the 4th radiant section 54, second conduit 72 then generally is level, and between first radiant section 51 and the 3rd radiant section 53; The width of second conduit 72 slightly is narrower than the width of first conduit 71.
When designing this dual-band antenna 2, the length by adjustment low frequency radiation portion 5 can determine the operating frequency range (be frequency range) of dual-band antenna 2 in the low frequency frequency range; Length by adjustment high-frequency radiation part 6 can determine the operating frequency range (be frequency range) of dual-band antenna 2 in high-frequency band; And the design of slotted eye 7 coupling low frequency radiation portions 5 and high-frequency radiation part 6 can produce resonance with the signal of another high frequency frequency range, and increases the work bandwidth of dual-band antenna 2 in high-frequency band.Shown in the arrow of Fig. 5, be the current path distribution map of low frequency radiation portion 5 when the low-frequency resonant; What the arrow of Fig. 6 was represented is the current path distribution map of high-frequency radiation part 6 when high-frequency resonant; What the arrow of Fig. 7 was represented then is the current path distribution map of slotted eye 7 when high-frequency resonant.
Consult Fig. 2 and Fig. 8 again; Fig. 8 is the end view of Fig. 2; And add and painted a copper-foil conducting electricity 93 that links to each other with grounding parts 4; Copper-foil conducting electricity 93 also is connected to the ground plane of electronic installation (being the notebook computer 9 of Fig. 4), with copper-foil conducting electricity 93 without lead connect grounding parts 4 and the reason of ground plane be copper-foil conducting electricity 93 to be connected area bigger, can guarantee the consistent of grounding parts 4 and ground plane current potential.
And Fig. 9 is the reverse side of Fig. 8, has disclosed this dual-band antenna 2 among the figure and has also comprised a coaxial transmission line 8.The signal anode 81 of coaxial transmission line 8 is the signal feed sides 56 that are connected to first radiant section 51, and its signal negative terminal 82 then is connected to grounding parts 4.What deserves to be mentioned is; Two opposition sides at the two ends of grounding parts 4 also respectively separately court generally be vertical direction (making progress) with grounding parts 4 and extend a locking part 42,43, each locking part 42,43 all is formed with perforation 421,431 for being locked on notebook computer 9 (see figure 4)s.
Figure 10 is second preferred embodiment of dual-band antenna 2 of the present invention; Itself and first preferred embodiment (Fig. 3) structural similarity; Difference is in first preferred embodiment; High-frequency radiation part 6 all is positioned at first plane with each thin portion element of low frequency radiation portion 5, but in second preferred embodiment, low frequency radiation portion 5 has only first, second, third, fourth radiant section the 51,52,53, the 54th, is positioned at first plane; The 5th radiant section 55 is not positioned at first plane completely, and high-frequency radiation part 6 to have only first extension 61 be to be positioned at first plane.The words that the 5th radiant section 55 segments again; Can comprise one first line segment 551 that is positioned at first plane, link to each other and be positioned at one second line segment 552 that generally is vertical one second plane (figure does not show) with first plane with first line segment 551, and link to each other with second line segment 552 and be positioned at generally be vertical with second plane but with one the 3rd line segment 553 of first parallel plane one the 3rd plane (scheming not show).And second extension 62 of high-frequency radiation part 6 is to be positioned on second plane, and the shape bending slightly becomes the U font.
Relatively Figure 10 and Fig. 3 can find out, second preferred embodiment makes dual-band antenna 2 shared spaces dwindle by bending the 5th radiant section 55 and second extension 62, for notebook computer 9 (see figure 4)s of having had too many difficulties to cope with in the design space, are advantages in fact.
Consult Figure 11, this figure is voltage standing wave ratio (VSWR) survey map of dual-band antenna 2, by finding out that its voltage standing wave ratio all can be less than 2 between 2400MHz～2500MHz and 4900MHz～5900MHz for frequency among the figure.In addition; Figure 12 is the measured radiation pattern of 2437MHz (Radiation Pattern) figure for dual-band antenna 2 in resonance frequency; Figure 13 is to be the measured radiation pattern of 5470MHz (Radiation Pattern) figure in resonance frequency; By finding out that the omni-directional of radiation pattern is fairly good among the figure.
Consult down page table 1 again, can find out by table 1, the total radiation energy (TotalRadiation Power) in the application frequency band＞-5dB, and efficient (Efficiency)＞35%.
Be noted that at last; It in above-mentioned two embodiment the position of defining high-frequency radiation part 6 and low frequency radiation portion 5 with first plane, second plane and the 3rd plane; Yet during actual embodiment; Its position can not be provided with so accurately, so deflection and not in conplane situation, should still belong to the scope that the present invention is contained slightly.
Table 1
In sum; The present invention can overcome the not enough shortcoming of traditional PIFA dual-band antenna frequency range by the design of slotted eye 7, and the main body of antenna is single face, can reduce the design cost of antenna; Moreover; Its project organization is simple, controls the operating frequency and the frequency range of low-and high-frequency easily, so can reach the object of the invention really.
The above person is merely the preferred embodiments of the present invention, and when not limiting the scope that the present invention implements with this, the simple equivalent of promptly doing according to content of the present invention generally changes and modifies, and all still belongs in the scope of the present invention.
Claims (11)
1. dual-band antenna comprises:
One ground connection section comprises an opposite link and an earth terminal;
One low frequency radiation portion; Link to each other with the link of this ground connection section; In order to be operated in a low frequency frequency range; And comprise that a signal feed side, this low frequency radiation portion also comprise by outward extending one first radiant section of the link of this ground connection section, generally are one second radiant section that vertical direction extends, generally are one the 3rd radiant section that parallel direction extends, generally are one the 4th radiant section that parallel direction extends, generally are one the 5th radiant section that parallel direction is extended by the end court and the 3rd radiant section of the 4th radiant section by end court and this second radiant section of the 3rd radiant section by end court and this first radiant section of this second radiant section by link court and this first radiant section of this ground connection section; The end of this first radiant section is this signal feed side; And
One high-frequency radiation part in order to being operated in a high-frequency band, and is stretched out by the signal feed side of this low frequency radiation portion, and defines a slotted eye jointly with this low frequency radiation portion; This slotted eye this low frequency radiation portion of coupling and this high-frequency radiation part are to increase the frequency range of this high-frequency band; This high-frequency radiation part comprises that the end court by this first radiant section generally is one first extension that parallel direction is extended with this second radiant section, and generally is one second extension that vertical direction is extended by the end court of this first extension with this first extension;
Wherein this slotted eye is generally L-shaped, and comprises one first conduit between between this first extension and the 4th radiant section, and one second conduit between between this first radiant section and the 3rd radiant section.
2. dual-band antenna according to claim 1, wherein, this high-frequency radiation part and this low frequency radiation portion all are positioned at one first plane.
3. dual-band antenna according to claim 1; Wherein, This first, second, third, fourth radiant section all is positioned at one first plane; The 5th radiant section comprises one first line segment that is positioned at this first plane, links to each other with this first line segment and is positioned at one second line segment that generally is vertical one second plane with this first plane, and links to each other with this second line segment and be positioned at one the 3rd line segment that generally is vertical one the 3rd plane with this second plane.
4. dual-band antenna according to claim 1, wherein, this first extension is to be positioned at one first plane, this second extension is to be positioned at this first plane generally to be one second vertical plane.
5. dual-band antenna according to claim 3, wherein, this first extension is to be positioned at this first plane, this second extension is to be positioned at this second plane.
6. according to the wherein arbitrary described dual-band antenna of claim 1-5, wherein, this low frequency frequency range is 2400MHz～2500MHz.
7. dual-band antenna according to claim 6, wherein, this high-frequency band is 4900MHz～5900MHz.
8. dual-band antenna according to claim 7 also comprises the grounding parts that links to each other with the earth terminal of this ground connection section, and two generally are the locking part that vertical direction is extended by the two opposition side courts at the two ends of this grounding parts with this grounding parts respectively.
9. dual-band antenna according to claim 8 also comprises the copper-foil conducting electricity that links to each other with this grounding parts, and this copper-foil conducting electricity also is connected to the ground plane of an electronic installation.
10. dual-band antenna according to claim 8, wherein, these locking parts all are formed with a perforation for locking.
11. dual-band antenna according to claim 8 also comprises a coaxial transmission line, the signal anode of this coaxial transmission line is connected to the signal feed side of this first radiant section, and the signal negative terminal of this coaxial transmission line is connected to this grounding parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810009295A CN101499556B (en) | 2008-02-03 | 2008-02-03 | Double-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810009295A CN101499556B (en) | 2008-02-03 | 2008-02-03 | Double-frequency antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101499556A CN101499556A (en) | 2009-08-05 |
| CN101499556B true CN101499556B (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810009295A Expired - Fee Related CN101499556B (en) | 2008-02-03 | 2008-02-03 | Double-frequency antenna |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044755A (en) * | 2009-10-26 | 2011-05-04 | 华硕电脑股份有限公司 | Plane multi-frequency antenna |
| CN102097682B (en) * | 2009-12-15 | 2014-04-09 | 广达电脑股份有限公司 | Multiband antenna |
| CN102104188B (en) * | 2009-12-16 | 2015-08-19 | 智易科技股份有限公司 | The antenna of tool multiband |
| CN102244313A (en) * | 2010-05-13 | 2011-11-16 | 广达电脑股份有限公司 | Antenna device with slot structure |
| CN102401002B (en) * | 2010-09-10 | 2016-06-01 | 连展科技电子（昆山）有限公司 | wireless transmission pivot device |
| CN103219580A (en) * | 2012-01-18 | 2013-07-24 | 上海腾怡半导体有限公司 | PIFA antenna system |
| CN108461921A (en) * | 2018-02-09 | 2018-08-28 | 东莞市森岭智能科技有限公司 | A kind of novel double-frequency WIFI antennas on metal shell television set |
| CN111864350B (en) * | 2019-04-29 | 2021-08-24 | 北京小米移动软件有限公司 | Antenna and terminal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200703784A (en) * | 2005-07-04 | 2007-01-16 | Quanta Comp Inc | Multi-frequency planar antenna |
| US7495630B2 (en) * | 2007-06-02 | 2009-02-24 | Chant Sincere Co., Ltd. | Feed point adjustable planar antenna |
-
2008
- 2008-02-03 CN CN200810009295A patent/CN101499556B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200703784A (en) * | 2005-07-04 | 2007-01-16 | Quanta Comp Inc | Multi-frequency planar antenna |
| US7495630B2 (en) * | 2007-06-02 | 2009-02-24 | Chant Sincere Co., Ltd. | Feed point adjustable planar antenna |
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| Publication number | Publication date |
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| CN101499556A (en) | 2009-08-05 |
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