CN102569994B - Multifrequency antenna - Google Patents
Multifrequency antenna Download PDFInfo
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- CN102569994B CN102569994B CN201010611347.1A CN201010611347A CN102569994B CN 102569994 B CN102569994 B CN 102569994B CN 201010611347 A CN201010611347 A CN 201010611347A CN 102569994 B CN102569994 B CN 102569994B
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- 230000007704 transition Effects 0.000 claims description 25
- 238000005452 bending Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims 1
- 238000004891 communication Methods 0.000 description 12
- 230000005855 radiation Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The invention provides a multifrequency antenna, which comprises a feed end, a grounding end, a first antenna unit, a second antenna unit and a resonance unit, wherein the feed end, the first antenna unit and the grounding unit are connected in sequence to form a loop antenna; the second antenna unit is arranged at the outer side of the first antenna unit and is arranged around the first antenna unit; the second antenna unit and the first antenna unit share the feed end and the grounding end; the feed end, the second antenna unit and the grounding end are connected in sequence to form another loop antenna; and the resonance unit is connected to the feed end. When the multifrequency antenna works, a signal enters from the feed end and can respectively acquire propagation paths with different lengths along the first antenna unit, the second antenna unit, the first antenna and the resonance unit, as well as the second antenna unit and the resonance unit so as to generate different signals, and furthermore, the multifrequency antenna has multiple working frequency bands.
Description
Technical field
The present invention relates to a kind of antenna, more particularly to a kind of multifrequency antenna.
Background technology
In radio communication devices such as mobile phone, personal digital assistants (personal digital assistant, PDA)
In, antenna is as to by the part of radio wave radio signals, undoubtedly most important in radio communication device
One of component.
Most of radio communication devices have possessed the function of being communicated in two or more frequency range at present.Therefore, in order to
Meet the demand of user, need to adopt multi-frequency antenna device.So existing multifrequency antenna versatility is mostly still poor, general
Can be used for receiving and dispatching the signal of two frequency ranges, be difficult while meeting three communicating requirements with super band.
In addition, electromagnetic wave absorption rate (specific absorption rate, the SAR) quality of radio communication device is made
The healthy performance pointer of wireless communication device user may be directly affected for one, just gradually by concern and the weight of people
Depending on.Usually, on the premise of the performance of radio communication device is not affected, it should reduce the SAR value of radio communication device as far as possible.
In order to ensure the health of user, some countries have formulated the highest standard of SAR, and such as Unite States Standard is 1.6W/kg, European standard
For 2.0W/kg.Therefore, how in design multifrequency antenna so as to SAR value can be reduced while receiving efficiency is kept and is shown again as far as possible
Obtain particularly necessary.
The content of the invention
In view of this, it is necessary to provide a kind of versatility relatively strong and can effectively reduce the multifrequency antenna of SAR value.
A kind of multifrequency antenna, including feed side, earth terminal, first antenna unit, the second antenna element and resonating member, institute
State feed side, first antenna unit and earth terminal to be sequentially connected, to constitute primary Ioops antenna, second antenna element is arranged on
The outside of the first antenna unit, and arrange around the first antenna unit, second antenna element is with first antenna unit altogether
It is sequentially connected with the feed side and earth terminal, and the feed side, the second antenna element and earth terminal, to constitute another loop day
Line, the resonating member are connected to feed side, and when the multifrequency antenna works, signal is entered from the feed side, can be along described the
One antenna element, the second antenna element, first antenna unit and resonating member, the second antenna element and resonating member are obtained respectively
The propagation path of different length, to produce different signals, and then causes the multifrequency antenna to have multiple working bands.
The multifrequency antenna of the present invention can operationally produce multiple resonant frequencies, effectively increase the frequency of multifrequency antenna
It is wide so that the frequency range scope of the multifrequency antenna can cover multiple communication systems, enhance the versatility of multifrequency antenna.Separately
Outward, the SAR value of the multifrequency antenna is relatively low.
Description of the drawings
Fig. 1 is the schematic perspective view of the multifrequency antenna of the first better embodiment of the invention.
Fig. 2 is the schematic perspective view under another angle of multifrequency antenna shown in Fig. 1.
Return loss schematic diagrams of the Fig. 3 for multifrequency antenna shown in Fig. 1.
Fig. 4 is the schematic perspective view of the multifrequency antenna of the second better embodiment of the invention.
Main element symbol description
Multifrequency antenna 100,200
Feed side 11,21
Earth terminal 12,22
First earth terminal 121
Second earth terminal 122
First antenna unit 13,23
Second antenna element 14,24
Resonating member 15,25
First ground section 131,231
Transition part 132,232
Connecting portion 133,233
First Transition section 1321
Second changeover portion 1322
Linkage section 1331
Feed-in section 1332
Second ground section 141
Zigzag part 142
Kink 143
First zigzag section 1421
Second zigzag section 1422
3rd zigzag section 1423
First bending segment 1431
Second bending segment 1432
Specific embodiment
Refer to Fig. 1, show the multifrequency antenna 100 of the first better embodiment of the invention, can be applicable to mobile phone,
In the radio communication devices such as personal digital assistant (personal digital assistant, PDA), and carry out in multiple frequency ranges
Transmitting, reception radio wave are with radio signals.
The multifrequency antenna 100 is a stereoscopic antenna, can be by metal sheet or flexible print circuit board (flexible
Printed circuit, FPC) make, including feed side 11, earth terminal 12, first antenna unit 13, the second antenna element 14
And resonating member 15.
The feed side 11 is strip lamellar body always, its be arranged on it is traditional on the circuit board inside radio communication device
Signal transmission end (not shown) is electrically connected with, and thinks that the multifrequency antenna 100 plays signal feed-in effect.
The earth terminal 12 includes the first earth terminal 121 and the second earth terminal 122, and first earth terminal 121 is vertical bar shape
Lamellar body, is laid in the plane perpendicular with 11 place plane of feed side, and is connected to the traditional ground connection on the circuit board
Part, to provide ground connection effect as the multifrequency antenna 100.Second earth terminal 122 is vertical bar shape lamellar body, is arranged on the feed-in
11 place planes, its one end are held vertically to be connected to the end of first earth terminal 121, the other end is along parallel to institute feed side 11
Direction extends, and is connected to the first antenna unit 13 and the second antenna element 14.
Fig. 2 is seen also, the first antenna unit 13 includes the first ground section 131, transition part 132 and connecting portion 133.
First ground section 131 is a strip lamellar body, and which is arranged in another plane perpendicular with 11 place plane of feed side, and
It is connected with the ending vertical of the earth terminal 12.The transition part 132 is laid in the plane with 11 place plane parallel of feed side
It is interior, including First Transition section 1321 and the second changeover portion 1322.The First Transition section 1321 be a rectangle lamellar body, its vertical connection
To the end of first ground section 131.Second changeover portion 1322 is strip lamellar body always, and which is vertically connected to the First Transition
In section 1321 away from the first ground section 131 end, to be constituted substantially L-shaped strip knot with the First Transition section 1321
Structure, and it is connected to the connecting portion 133.The connecting portion 133 is integrally provided in the 131 place plane of the first ground section, including connection
Section 1331 and feed-in section 1332.The linkage section 1331 is the bearing of trend strip consistent with 1322 bearing of trend of the second changeover portion
Lamellar body, which is mutually connected vertically with the end sides of second changeover portion 1322.The feed-in section 1332 be a strip lamellar body, one
End is vertically connected to the end of linkage section 1331, and the other end is along parallel first ground section 131 and the side away from linkage section 1331
To extension, finally it is connected with the feed side 11.Thus, the feed side 11, first antenna unit 13 and earth terminal 12 are sequentially connected,
And constitute a complete current loop.
Second antenna element 14 includes the second ground section 141, zigzag part 142 and kink 143.Second ground section
141 is a substantially L-shaped lamellar body, and which is arranged on 131 institute of the first ground section planar.Second ground section 141
One end is connected to the end of the earth terminal 12 and the first ground section 131, the other end along vertical first ground section 131 and away from
After the direction of connecting portion 133 extends a distance into, a right angle is bent, extended with direction of the edge parallel to the first ground section 131.Should
Zigzag part 142 is the substantially lamellar body in " ㄩ " type, and which is laid in 132 institute of transition part planar, and positioned at the outer of transition part 132
Side.The zigzag part 142 includes the first zigzag section 1421, the second zigzag section 1422 and the 3rd zigzag section 1423.First zigzag section
The 1421 strip lamellar bodies for being more than 1321 length of First Transition section for a length, its one end are connected to second ground section 141
End, and extend along the direction parallel to First Transition section 1321, and it is connected to second zigzag section 1422.Second zigzag section
1422 is strip lamellar body always, and its one end is vertically connected to the end of first zigzag section 1421, the other end along parallel to this
The direction of two changeover portions 1322 extends, and its length is more than the length of second changeover portion 1322.3rd zigzag section 1423 is
One strip lamellar body, its one end are vertically connected to the end of second zigzag section 1422, and the other end is along parallel first zigzag section
1421 direction extends, and is connected to the kink 143.The kink 143 is laid in 131 place plane of the first ground section,
Including the first bending segment 1431 and the second bending segment 1432.First bending segment 1431 is a strip lamellar body, and its one end is connected to
The end of the zigzag part 142, the other end extend along the direction parallel to the first ground section 131.Second bending segment 1432 is
Strip lamellar body, its one end are connected to the end of first bending segment 1431, the other end along perpendicular to the first bending segment 1431 and
Extend near the direction of the first ground section 131, and be connected to the side of the connecting portion 133.Thus, second antenna element 14 encloses
The outside of the first antenna unit 13 is wound on, and feed side 11 and earth terminal 12 is shared with the first antenna unit 13 so that
The feed side 11, the second antenna element 14 and earth terminal 12 are sequentially connected, and constitute a complete current loop.
The resonating member 15 is a strip lamellar body, and which is arranged on 131 institute of the first ground section planar, its one end connection
To the feed side 11 and the end of connecting portion 133, the other end extends along vertical and away from the first ground section 131 direction.
When the multifrequency antenna 100 works, after signal is entered from feed side 11, can be along the second antenna element 14, first
Antenna element 13, the second antenna element 14 respectively obtain different with resonating member 15 from resonating member 15, first antenna unit 13
The propagation path of length, and produce different current signals so that the multifrequency antenna 100 can respectively at 930MHz, 1050MHz,
1900MHz and 2000MHz produce corresponding resonance mode, so make the multifrequency antenna 100 can respectively at GSM900, DCS1800,
Work under multiple conventional wireless communication frequency bands such as PCS1900.
Fig. 3 is referred to, standing-wave ratio (the Voltage Standing Wave of multifrequency antenna of the present invention 100 are shown
Ratio, VSWR) schematic diagram, as can be seen from Figure, the multifrequency antenna is in 930MHz, 1050MHz, 1900MHz, 2000MHz
Antenna Operation design requirement can be met under operating frequency.
Table 1 is referred to, the radiation efficiency and electricity of the multifrequency antenna 100 for measuring the first better embodiment of the invention is shown
Magnetic absorbing ratio (specific absorption rate, SAR).As shown in Table 1, compared with traditional antenna, the present invention's is more
Frequency antenna 100 can be effectively dropped while the radiation efficiency of the multifrequency antenna 100 is not affected under the operating frequency of 930MHz
The SAR value of the low multifrequency antenna 100；And under the operating frequency of 1050MHz, no matter then in radiation efficiency or SAR value, having
Significantly improve.
The radiation efficiency and SAR value of each frequency of 1 multifrequency antenna of table
Fig. 4 is seen also, is the multifrequency antenna 200 of the second better embodiment of the invention, including feed side 21, ground connection
End 22, first antenna unit 23, the second antenna element 24 and resonating member 25.The area of the multifrequency antenna 200 and multifrequency antenna 100
Be not the connecting portion 233 for a length and width and the suitable strip lamellar body of first ground section 231, be integrally provided in this
One ground section, 231 place plane.One end of the connecting portion 233 is connected to the end of the transition part 232, the other end along parallel to
The direction of the first ground section 231 extends, and is connected to the feed side 21.
In addition, the resonating member 25 is a strip lamellar body, which is arranged on 231 institute of the first ground section planar, one
End is connected to the connecting portion 233 near the side of first ground section 231, and the other end is along vertical and close first ground section 231
Direction extend.
Obviously, multifrequency antenna 100/200 of the invention can operationally produce more than three resonant frequencies, be effectively increased
The frequency range of multifrequency antenna 100/200 so that the frequency range scope of the multifrequency antenna 100/200 can cover multiple communication systems
System, enhances the versatility of multifrequency antenna 100/200.In addition, the multifrequency antenna 100/200 is not affecting the same of its radiation efficiency
When, SAR value can be effectively reduced, the impact to user is reduced.
Claims (9)
1. a kind of multifrequency antenna, it is characterised in that：The multifrequency antenna include feed side, earth terminal, first antenna unit, second
Antenna element and resonating member, the feed side, first antenna unit and earth terminal are sequentially connected, to constitute primary Ioops antenna,
The first antenna unit includes the first ground section, transition part and connecting portion, and first ground section is arranged on and is located with feed side
In the perpendicular plane of plane, and it is connected with the ending vertical of the earth terminal, the transition part is laid in and is located with the feed side
In the plane of plane parallel, and vertically connect first ground section and connecting portion, second antenna element be arranged on this
The outside of one antenna element, and arrange around the first antenna unit, second antenna element should with first antenna units shared
Feed side and earth terminal, and the feed side, the second antenna element and earth terminal be sequentially connected, to constitute another loop antenna, institute
Stating the second antenna element includes the second ground section, zigzag part and kink, and second ground section is a L-shaped lamellar body, if
Put in first ground section institute planar, the zigzag part is the lamellar body in " ㄩ " type, be laid in transition part institute planar,
And positioned at the outside of transition part, which is vertically connected to second ground section and kink, the kink is laid in the first ground connection
Section place plane, which vertically connects the zigzag part and connecting portion, and the resonating member is arranged on the first ground section place plane, should
One end of resonating member is connected to the end of feed side and connecting portion, and the other end prolongs along the vertical and direction away from the first ground section
Stretch, when the multifrequency antenna works, signal is entered from the feed side, can along the first antenna unit, the second antenna element,
First antenna unit obtains the propagation path of different length respectively with resonating member, the second antenna element and resonating member, to produce
The different signal of life, and then cause the multifrequency antenna that there are multiple working bands.
2. multifrequency antenna as claimed in claim 1, it is characterised in that：First ground section is a strip lamellar body.
3. multifrequency antenna as claimed in claim 1, it is characterised in that：The transition part includes First Transition section and the second transition
Section, First Transition Duan Weiyi rectangle lamellar bodies, which is vertically connected to the end of first ground section, and second changeover portion is for always
Strip lamellar body, is vertically connected in the First Transition section end away from the first ground section, to constitute with the First Transition section is in
The list structure of " L " type, and it is connected to the connecting portion.
4. multifrequency antenna as claimed in claim 3, it is characterised in that：The connecting portion is integrally provided in the first ground section institute
Planar, including linkage section and feed-in section, the linkage section is the bearing of trend bar consistent with the second changeover portion bearing of trend
Shape lamellar body, which is mutually connected vertically with the end sides of second changeover portion, and feed-in Duan Weiyi strip lamellar bodies, its one end are vertical
It is connected to the end of linkage section, direction of the other end along parallel first ground section and away from linkage section extends, finally with the feedback
Enter end to be connected.
5. multifrequency antenna as claimed in claim 1, it is characterised in that：The resonating member is a strip lamellar body.
6. the multifrequency antenna as described in claim 1 or 3, it is characterised in that：The connecting portion be a strip lamellar body, whole installation
In the first ground section place plane, one end of the connecting portion is connected to the end of the transition part, and the other end is along parallel to the
The direction of one ground section extends, and is connected to the feed side.
7. multifrequency antenna as claimed in claim 6, it is characterised in that：The resonating member is a strip lamellar body, and which is arranged on
Planar, its one end is connected to the connecting portion near the side of the first ground section, and the other end is along vertical for the first ground section institute
And extend near the direction of the first ground section.
8. multifrequency antenna as claimed in claim 3, it is characterised in that：The zigzag part includes the first zigzag section, second tortuous
Section and the 3rd zigzag section, first zigzag section are a strip lamellar body, and its one end is connected to the end of second ground section, and edge
Extend parallel to the direction of First Transition section, and be connected to second zigzag section, second zigzag section is strip lamellar body always, its
One end is vertically connected to the end of first zigzag section, and the other end extends along the direction parallel to second changeover portion, and the 3rd
Zigzag section is a strip lamellar body, and its one end is vertically connected to the end of second zigzag section, and this is first tortuous along parallel for the other end
The direction of section extends, and is connected to the kink.
9. multifrequency antenna as claimed in claim 1, it is characterised in that：The kink includes the first bending segment and the second bending
Section, first bending segment is a strip lamellar body, and its one end is connected to the end of the zigzag part, and the other end is along connecing parallel to first
The direction in location extends, and second bending segment is strip lamellar body, and its one end is vertically connected to the end of first bending segment, separately
One end edge extends perpendicular to the first ground section and near the direction of the first ground section, and is connected to the side of the connecting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010611347.1A CN102569994B (en) | 2010-12-29 | 2010-12-29 | Multifrequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010611347.1A CN102569994B (en) | 2010-12-29 | 2010-12-29 | Multifrequency antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102569994A CN102569994A (en) | 2012-07-11 |
| CN102569994B true CN102569994B (en) | 2017-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010611347.1A Expired - Fee Related CN102569994B (en) | 2010-12-29 | 2010-12-29 | Multifrequency antenna |
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| Country | Link |
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| CN (1) | CN102569994B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966742A (en) * | 2017-12-26 | 2018-04-27 | 深圳市雄帝科技股份有限公司 | Hand-held safety check apparatus and safe examination system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1729593A (en) * | 2002-10-28 | 2006-02-01 | 科学、技术与研究机构 | Miniature built-in multiple frequency band antenna |
| CN101740859A (en) * | 2008-11-25 | 2010-06-16 | 和硕联合科技股份有限公司 | Multi-band antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7205942B2 (en) * | 2005-07-06 | 2007-04-17 | Nokia Corporation | Multi-band antenna arrangement |
-
2010
- 2010-12-29 CN CN201010611347.1A patent/CN102569994B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1729593A (en) * | 2002-10-28 | 2006-02-01 | 科学、技术与研究机构 | Miniature built-in multiple frequency band antenna |
| CN101740859A (en) * | 2008-11-25 | 2010-06-16 | 和硕联合科技股份有限公司 | Multi-band antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102569994A (en) | 2012-07-11 |
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Granted publication date: 20170412 |