CN102820523B - Multifrequency antenna - Google Patents
Multifrequency antenna Download PDFInfo
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- CN102820523B CN102820523B CN201110150510.3A CN201110150510A CN102820523B CN 102820523 B CN102820523 B CN 102820523B CN 201110150510 A CN201110150510 A CN 201110150510A CN 102820523 B CN102820523 B CN 102820523B
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Abstract
A kind of multifrequency antenna.This multifrequency antenna is used for the sending and receiving end being electrically connected on radio circuit by feed element, and multifrequency antenna comprises grounding parts, and grounding parts comprises edge; Feeding portion, to be positioned at outside grounding parts edge and to be electrically connected on feed element, transmitting radio frequency signal; First radiation arm, comprises free end and connecting end portion, produces the first resonance mode; Second radiation arm, comprise free end, connecting end portion and extend arm, the second radiation arm produces the second resonance mode; And first coupling assembly, comprise ground connection arm and coupling arm, coupling arm has the right side of the free end being positioned at the second radiation arm, and contiguous feeding portion and not with the free end of the first radiation arm longitudinal overlap; During multifrequency antenna receiving and transmitting signal, extend arm and produce coupling effect be coupled between arm, make the first coupling assembly generation the 3rd resonance mode, and three of first, second and third resonance mode centre frequencies are all not identical.The present invention makes single multifrequency antenna be suitable for plurality of communication systems.
Description
Technical field
The present invention relates to a kind of antenna, particularly a kind of multifrequency antenna.
Background technology
Along with the day by day opening of part wireless communication frequency band in recent years, more and more consumption electronic products are made all to need to have communication function, and be almost pushed out with regard to there being the communication system of a new generation every several years, so all need to contain older but still in using Generation Mobile Telecommunication System (SecondGenerationWirelessTelephoneTechnology as intelligent mobile phone or portable computer simultaneously, 2G) system, or current 3G (Third Generation) Moblie (3rdGeneration, 3G) system, even be follow-on Long Term Evolution (LongTermEvolution, LTE) systematic difference, can contain with single antenna the multifrequency antenna that multiple frequency band uses for different system just especially important so a kind of simultaneously.
A kind of known method solving multiband operational requirements is exactly with the system application corresponding different separately of multiple independently antenna, as the transmitting-receiving of 2G system is responsible for by an antenna, the transmitting-receiving of 3G system is then responsible for by another antenna, but along with the integration of communication system circuit and reducing of consumption electronic products volume, the method that this kind contains different system frequency band respectively with the antenna of more than two does not meet actual demand, so the design of antenna just must towards the direction evolution that can operate in multiband with single.
Consult Fig. 1, Fig. 1 is U.S. Publication patent No. US7, 050, the multifrequency antenna of 010, this kind of antenna is applicable to return the dual frequency operation shown in loss (returnloss) figure as Fig. 2, this resonance bands close to 2.4GHz is made up of a resonance mode, another high-frequency resonance mode close to 5GHz is made up of two resonance modes, though this kind of antenna can reach multi-band operation, but close to the frequency band of this 2.4GHz because only there is single resonance mode so limited bandwidth, if therefore follow this kind of design adjust this antenna size and change frequency of operation, then under limited antenna height, this antenna not easily meets bandwidth (704 ~ 960MHz) demand of the system of these LTEband (LTE frequency band) 13/17 and GSM850/900MHz simultaneously.
Consult Fig. 3, Fig. 3 is the long-term evolution antenna structure of No. M391734th, TaiWan, China patent, though this kind of antenna structure can be applicable to return the LTEband13 shown in loss figure as Fig. 4 simultaneously, GSM (GlobalSystemforMobileCommunications (global system for mobile communications)), DCS (DigitalCellularSystem (Digital Cellular System)), the systems such as PCS (PersonalCommunicationSystem (PCS Personal Communications System)) and WCDMA (WidebandCodeDivisionMultipleAccess (Wideband Code Division Multiple Access (WCDMA))), but one first coupling part 11 of this antenna, one unipole antenna 12 and one the 3rd coupling part 13 longitudinal overlap all each other, electromagnetic energy is to each other coupled mutually, so once the resonance mode needing adjustment to contain 1710 ~ 2170MHz frequency band, other resonance modes containing 746 ~ 960MHz frequency band also can be affected in the lump and produce frequency deviation or impedance mismatch, and then the complexity increased when designing.In addition, this kind of multifrequency antenna design also needs to comprise an electric capacity 2, also additionally can increase the program and cost that manufacture this kind of antenna.
Therefore, need to provide a kind of multifrequency antenna, to solve the problem.
Summary of the invention
Therefore, object of the present invention, is namely providing one without the need to extra circuits assembly and is being convenient to design, and can contain the multifrequency antenna of multiple communication system applications.
So multifrequency antenna of the present invention is applicable to the sending and receiving end being connected to a radio circuit by a feed element, and comprise a grounding parts, a feeding portion, one first radiation arm, one second radiation arm and one first coupling assembly; This grounding parts comprises the edge of a horizontal expansion; This feeding portion is positioned at the outside at the edge of this grounding parts and is electrically connected on this feed element, and via the sending and receiving end transmitting radio frequency signal of this feed element and this radio circuit; This first radiation arm is positioned at the right side of this feeding portion and comprises the connecting end portion that a free end and is electrically connected on this feeding portion, and this first radiation arm is in order to produce one first resonance mode; This second radiation arm is positioned at the left side of this feeding portion, and comprise the connecting end portion that a free end, is electrically connected on this feeding portion, and a horizontal expansion be electrically connected the extension arm of this free end and this connecting end portion, this second radiation arm is in order to produce one second resonance mode; This first coupling assembly does not contact with this second radiation arm and this feeding portion, and comprise one be positioned at this feeding portion left side and from the edge of this grounding parts the ground connection arm of longitudinal extension outwardly, and one from the arm that is coupled of the extension arm interval overlapping of this ground connection arm towards this feeding portion horizontal expansion and with this second radiation arm, and this coupling arm has the right side that is positioned at the free end of this second radiation arm, and this feeding portion contiguous and not with the free end of this first radiation arm longitudinal overlap; When this multifrequency antenna receiving and transmitting signal, the extension arm of this second radiation arm produces coupling effect with being coupled between arm of this first coupling assembly, make this first coupling assembly produce one the 3rd resonance mode, and three centre frequencies of this first resonance mode, this second resonance mode and the 3rd resonance mode are all not identical.
The bandwidth that namely effect of the present invention is utilizing this first mode and this second mode to increase this first frequency band, the frequency band range utilizing this first mode, second mode and the 3rd mode increase to contain, makes single multifrequency antenna and applicable plurality of communication systems.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram of known dual-band antenna;
Fig. 2 be this known dual-band antenna return loss figure;
Fig. 3 is a kind of schematic diagram of known long-term evolution antenna structure;
Fig. 4 be this known long-term evolution antenna structure return loss figure;
Fig. 5 is the schematic diagram of the first execution mode of multifrequency antenna first of the present invention preferred embodiment, illustrates that one first coupling assembly interval overlapping is in the top of one second radiation arm;
Fig. 6 is the voltage standing wave ratio figure of the first execution mode of this first preferred embodiment;
Fig. 7 is the schematic diagram of the second execution mode of this first preferred embodiment, illustrates that this first coupling assembly interval overlapping is in the below of this second radiation arm;
Fig. 8 is the schematic diagram of the third execution mode of this first preferred embodiment, illustrates that this first coupling assembly and this second radiation arm are positioned at identical longitudinally height;
Fig. 9 is the schematic diagram of the 4th kind of execution mode of this first preferred embodiment, illustrates that this second radiation arm also comprises a line of rabbet joint;
Figure 10 is the schematic diagram of multifrequency antenna second of the present invention preferred embodiment, illustrates that this multifrequency antenna also comprises one second coupling assembly;
Figure 11 is the schematic diagram of multifrequency antenna of the present invention 3rd preferred embodiment, illustrates that this multifrequency antenna also comprises one the 3rd radiation arm compared to first preferred embodiment of Fig. 5;
Figure 12 is the voltage standing wave ratio figure of the 3rd preferred embodiment;
Figure 13 is the schematic diagram of the another kind of execution mode of the 3rd preferred embodiment, illustrates that the 3rd radiation arm extends towards the free end of one first radiation arm from a feeding portion;
Figure 14 is a schematic diagram of multifrequency antenna of the present invention 4th preferred embodiment, illustrate this multifrequency antenna also comprise one be positioned on the left of this feeding portion one adjustment arm; And
Figure 15 is the schematic diagram of the another kind of execution mode of the 4th preferred embodiment, illustrates that this adjustment arm is positioned at the right side of this feeding portion.
Primary clustering symbol description:
11 first coupling part 74 lines of rabbet joint
12 unipole antenna 741 openings
13 second coupling part 8 first coupling assemblies
14 electric capacity 81 ground connection arms
2 circuit boards 82 are coupled arm
3 grounding parts 821 free ends
31 edge 0 second coupling assemblies
4 adjustment arm 01 free ends
41 end 02 connecting end portion
5 feeding portion 9 coaxial cables
6 first radiation arm 91 heart yearns
61 free end 92 screens
62 connecting end portion 10 the 3rd radiation arm
63 opening 101 free ends
7 second radiation arm 102 connecting end portion
71 free end X laterally
72 connecting end portion Y longitudinally
73 extend arm
Embodiment
Aforementioned and other technology contents, feature and effect for the present invention, in the following detailed description coordinated with reference to four preferred embodiments of accompanying drawing, can clearly present.
Before the present invention is described in detail, it should be noted that in the following description content, similar assembly represents with identical numbering.
Consult Fig. 5, the first execution mode of first preferred embodiment of multifrequency antenna of the present invention, comprises a grounding parts 3, and is formed at feeding portion 5,1 first radiation arm 6,1 second radiation arm 7,1 first coupling assembly 8 on a circuit board 2 and a feed element 9.
The present embodiment is when being applied to as products such as notebook computers for the present invention, this feed element 9 can be a coaxial cable in this application, this feed-in unit 9 is electrically connected this antenna and a circuit system (not shown), and the radiofrequency signal of this wish transmitting-receiving can sequentially be transmitted between this antenna, this coaxial cable 9 and this circuit system.
This grounding parts 3 comprises an edge 31 extended along one horizontal (X), this feeding portion 5 is positioned at the outside at the edge 31 of this grounding parts 3 and is electrically connected on the heart yearn 91 of this coaxial cable 9, and the metal screen layer 92 of this coaxial cable 9 is then electrically connected on this grounding parts 3.
First radiation arm 6 of this horizontal expansion is in a linear and be positioned at the right side of this feeding portion 5, and comprises the connecting end portion 62 that a free end 61 and is electrically connected on this feeding portion 5.
This second radiation arm 7 is positioned at the left side of this feeding portion 5, and comprises the connecting end portion 72 that a free end 71, is electrically connected on this feeding portion 5, and a horizontal expansion be electrically connected the extension arm 73 of this free end 71 and this connecting end portion 72.
This first coupling assembly 8 does not contact with this second radiation arm 7 and this feeding portion 5, and comprise one be positioned at this feeding portion 5 left side and from the edge 31 of this grounding parts 3 towards outer one perpendicular to the ground connection arm 81 that the longitudinal direction (Y) of this transverse direction (X) extends, and one to be coupled towards this feeding portion 5 horizontal expansion and with one of extension arm 73 interval overlapping of this second radiation arm 7 arm 82 from this ground connection arm 81, and this coupling arm 82 has the right side that is positioned at the free end 71 of this second radiation arm 7, and this feeding portion 5 contiguous and not with the free end 821 of this first radiation arm 6 longitudinal overlap.
Consult Fig. 5 and Fig. 6, when this multifrequency antenna receiving and transmitting signal, this first radiation arm 6 is in order to produce one first resonance mode, and this second radiation arm 7 is in order to produce one second resonance mode; In addition, the extension arm 73 of this second radiation arm 7 produces coupling effect with being coupled between arm 82 of this first coupling assembly 8, makes this first coupling assembly 8 produce one the 3rd resonance mode.
This first resonance mode and the 3rd resonance mode form one can contain one first frequency band (704 ~ 960MHz, LTEband13/LTEband17/GSM850/GSM900) bimodal, and this second resonance mode can contain another second frequency band (1710 ~ 2170MHz, DCS/PCS/WCDMA).
In addition, voltage standing wave ratio in this first frequency band and this second frequency band range can also be demonstrate,proved all lower than 3 by Fig. 6, therefore really for transceiving radio frequency signal can effectively transmit via this multifrequency antenna and receive in frequency band range mentioned above.
Consult Fig. 7, Fig. 7 is the second execution mode of this first preferred embodiment, this coupling arm 82 also can interval overlapping in the below of the extension arm 73 of this second radiation arm 7.
Consult Fig. 8, Fig. 8 is the third execution mode of this first preferred embodiment, and this coupling arm 82 and the extension arm 73 of this second radiation arm 7 also can be positioned at identical longitudinal direction (Y) height and the parallel front and back do not contacted are stacked.
Consult Fig. 9, Fig. 9 is the 4th kind of execution mode of this first preferred embodiment, this second radiation arm 7 also comprises the line of rabbet joint 74 that has an opening 741, and this coupling arm 82 extends in this line of rabbet joint 74 from this opening 741, to increase the capacitive coupling amount that this second radiation arm 7 is coupled between arm 82 with this.
Consult Figure 10, second preferred embodiment of this antenna also comprises one second coupling assembly 0 compared to first preferred embodiment of Fig. 5, this second coupling assembly 0 comprises the connecting end portion 02 of free end 01 on the right side of a free end 71 being positioned at this second radiation arm 7 and this first coupling assembly 8 of electrical connection, when this multifrequency antenna receiving and transmitting signal, produce coupling effect between this second coupling assembly 0 and this second radiation arm 7 and produce one the 4th resonance mode, 4th resonance mode and this second resonance mode form another bimodal containing this second frequency band, and the frequency of this second frequency band is higher than the frequency of this first frequency band.
Consult Figure 11, the 3rd preferred embodiment of this antenna, except comprising all component of this first preferred embodiment, also comprises one the 3rd radiation arm 10.3rd radiation arm 10 and this first radiation arm 6 are positioned at the right side of this feeding portion 5 non-intersectly, and comprise the connecting end portion 102 that a free end 101 and is electrically connected on this feeding portion 5; In addition, this first radiation arm 6 is in an opening 63 towards the U-shaped on a left side, and the 3rd radiation arm 10 is the linear of a transverse direction and extends into the right in the opening 63 of this first radiation arm 6 from this feeding portion 5.
Consult Figure 11 and Figure 12, when this multifrequency antenna receiving and transmitting signal, 3rd radiation arm 10 is in order to produce one the 4th resonance mode, and the 4th resonance mode and this second resonance mode form another bimodal containing this second frequency band, and the frequency of this second frequency band is higher than the frequency of this first frequency band.
Consult Figure 13, Figure 13 is another execution mode of the 3rd preferred embodiment (see Figure 11), and the 3rd radiation arm 10 also can extend close towards the free end 61 of this first radiation arm 6 from this feeding portion 5.
Consult Figure 14 and Figure 15,4th preferred embodiment of this antenna comprises all constituent components in the 3rd preferred embodiment (see Figure 11), just this multifrequency antenna is also containing comprising one roughly in inverted L-shaped and two ends 41 are electrically connected on this feeding portion 5 and this grounding parts 3 respectively, in order to adjust the adjustment arm 4 of impedance matching (impedancematching).Though the adjustment arm 4 of this antenna in inverted L-shaped at this, is not limited with this shape, and can be arranged in the either side of this feeding portion 5 left and right sides, just these ends 41 need be electrically connected on this feeding portion 5 and this grounding parts 3 respectively in order to adjust the impedance matching of this antenna.
In sum, due to this first coupling assembly 8 of multifrequency antenna of the present invention and this second coupling assembly 0 not with this first radiation arm 6 and the 3rd radiation arm 10 longitudinal overlap, so can avoid and produce between this first radiation arm 6 or the 3rd radiation arm 10 disturbing, the frequency shift (FS) between each resonance mode of this multifrequency antenna and impedance matching is made to compare the easy independent design adjustment of known antenna in Fig. 3, also without the need to additionally increasing this matching capacitance 2, therefore can reduce costs; In addition, first frequency band (704 ~ 960MHz) of this multifrequency antenna comprises two resonance modes, therefore the design comparing known Fig. 1 can effectively increase the bandwidth of operation of this first frequency band and can be applicable to multiple communication system simultaneously, therefore this multifrequency antenna can reach object of the present invention really.
Only as described above, be only preferred embodiment of the present invention, can not limit scope of the invention process with this, namely the simple equivalent variations done of every scope according to claims of the present invention and description of the invention content and modification, all still remain within the scope of the patent.
Claims (11)
1. a multifrequency antenna, be applicable to the sending and receiving end being electrically connected on a radio circuit by a feed element, this multifrequency antenna comprises:
One grounding parts, this grounding parts comprises the edge of a horizontal expansion;
One feeding portion, this feeding portion is positioned at the outside at the edge of this grounding parts and is electrically connected on this feed element, and via the sending and receiving end transmitting radio frequency signal of this feed element and this radio circuit;
One first radiation arm, this first radiation arm is positioned at the right side of this feeding portion and comprises the connecting end portion that a free end and is electrically connected on this feeding portion, and this first radiation arm is in order to produce one first resonance mode;
One second radiation arm, this the second radiation arm is positioned at the left side of this feeding portion, and comprise the connecting end portion that a free end, is electrically connected on this feeding portion, and a horizontal expansion be electrically connected the extension arm of this free end and this connecting end portion, this second radiation arm is in order to produce one second resonance mode; And
One first coupling assembly, this first coupling assembly does not contact with this second radiation arm and this feeding portion, and comprise one be positioned at this feeding portion left side and from the edge of this grounding parts the ground connection arm of longitudinal extension outwardly, and one from the arm that is coupled of the extension arm interval overlapping of this ground connection arm towards this feeding portion horizontal expansion and with this second radiation arm, and this coupling arm has the right side that is positioned at the free end of this second radiation arm, and this feeding portion contiguous and not with the free end of this first radiation arm longitudinal overlap, wherein this coupling arm not with this first radiation arm longitudinal overlap,
When this multifrequency antenna receiving and transmitting signal, the extension arm of this second radiation arm produces coupling effect with being coupled between arm of this first coupling assembly, make this first coupling assembly produce one the 3rd resonance mode, and three centre frequencies of this first resonance mode, this second resonance mode and the 3rd resonance mode are all not identical;
Wherein, this multifrequency antenna only comprises this first coupling assembly of an edge from this grounding parts longitudinal extension outwardly, and
Wherein this multifrequency antenna also comprises one the 3rd radiation arm, 3rd radiation arm and this first radiation arm are positioned at the right side of this feeding portion non-intersectly, and comprise the connecting end portion that a free end and is electrically connected on this feeding portion, and this first coupling assembly not with the 3rd radiation arm longitudinal overlap.
2. multifrequency antenna according to claim 1, wherein, the 3rd radiation arm is in order to produce one the 4th resonance mode, and the centre frequency of the 4th resonance mode is all not identical with the centre frequency of other three resonance modes.
3. multifrequency antenna according to claim 2, wherein, this first radiation arm is the U-shaped of an opening towards a left side, the linear of the 3rd radiation arm then in a transverse direction.
4. multifrequency antenna according to claim 3, wherein, the 3rd radiation arm extends into the right in the opening of this first radiation arm U-shaped from this feeding portion.
5. multifrequency antenna according to claim 3, wherein, the 3rd radiation arm extends close from this feeding portion towards the free end of this first radiation arm.
6. multifrequency antenna according to claim 2, wherein, this first and the 3rd resonance mode form the bimodal that contains one first frequency band, this second forms another bimodal containing second frequency band different with this first frequency band from the 4th resonance mode.
7. multifrequency antenna according to claim 6, wherein, the frequency of this second frequency band is higher than the frequency of this first frequency band.
8. multifrequency antenna according to claim 1, wherein, this first radiation arm is the linear of a transverse direction.
9. multifrequency antenna according to claim 1 also comprises one second coupling assembly, this second coupling assembly comprises the free end on the right side of a free end being positioned at this second radiation arm, and one electrical connection this first coupling assembly connecting end portion, when this multifrequency antenna receiving and transmitting signal, produce coupling effect between this second coupling assembly and this second radiation arm and produce one the 4th resonance mode.
10. multifrequency antenna according to claim 9, wherein, this first and the 3rd resonance mode form the bimodal that contains one first frequency band, this second forms another bimodal containing second frequency band different with this first frequency band from the 4th resonance mode.
11. multifrequency antennas according to claim 1, wherein, this second radiation arm also comprises the line of rabbet joint that has an opening, and this coupling arm extends into this line of rabbet joint from this opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110150510.3A CN102820523B (en) | 2011-06-07 | 2011-06-07 | Multifrequency antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110150510.3A CN102820523B (en) | 2011-06-07 | 2011-06-07 | Multifrequency antenna |
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| CN102820523A CN102820523A (en) | 2012-12-12 |
| CN102820523B true CN102820523B (en) | 2016-03-23 |
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| CN201110150510.3A Active CN102820523B (en) | 2011-06-07 | 2011-06-07 | Multifrequency antenna |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104103892B (en) * | 2013-04-09 | 2016-08-10 | 宏碁股份有限公司 | Mobile communications device |
| CN104241855B (en) * | 2013-06-06 | 2019-05-10 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with the antenna structure |
| CN104868248A (en) * | 2014-02-26 | 2015-08-26 | 启碁科技股份有限公司 | Broadband antenna |
| CN104201459B (en) * | 2014-08-28 | 2017-12-15 | 深圳市可信华成通信科技有限公司 | A kind of multiband passive antenna under adverse circumstances |
| TWI682586B (en) * | 2017-07-03 | 2020-01-11 | 仁寶電腦工業股份有限公司 | Multi-band antenna |
| CN109411883B (en) * | 2017-08-15 | 2021-10-08 | 启碁科技股份有限公司 | Antenna structure |
| CN109980364B (en) * | 2019-02-28 | 2021-09-14 | 华为技术有限公司 | Antenna module, antenna device and terminal equipment |
| TWI747538B (en) * | 2020-10-05 | 2021-11-21 | 廣達電腦股份有限公司 | Antenna system |
| CN117374571A (en) * | 2022-06-30 | 2024-01-09 | 西安电子科技大学 | Antenna module, antenna array and electronic equipment |
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| CN1596486A (en) * | 2001-11-28 | 2005-03-16 | 皇家飞利浦电子股份有限公司 | Dual-band antenna arrangement |
| CN101106211A (en) * | 2006-07-14 | 2008-01-16 | 连展科技电子（昆山）有限公司 | Dual loop multi-frequency antenna |
| CN101911388A (en) * | 2008-01-08 | 2010-12-08 | Ace技术株式会社 | Multi-band internal antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7057560B2 (en) * | 2003-05-07 | 2006-06-06 | Agere Systems Inc. | Dual-band antenna for a wireless local area network device |
| CN101557030B (en) * | 2008-04-10 | 2012-08-08 | 广达电脑股份有限公司 | Multi-frequency antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1596486A (en) * | 2001-11-28 | 2005-03-16 | 皇家飞利浦电子股份有限公司 | Dual-band antenna arrangement |
| CN101106211A (en) * | 2006-07-14 | 2008-01-16 | 连展科技电子（昆山）有限公司 | Dual loop multi-frequency antenna |
| CN101911388A (en) * | 2008-01-08 | 2010-12-08 | Ace技术株式会社 | Multi-band internal antenna |
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