CN102025028A - Three-dimensional double-frequency antenna - Google Patents
Three-dimensional double-frequency antenna Download PDFInfo
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- CN102025028A CN102025028A CN2009101777878A CN200910177787A CN102025028A CN 102025028 A CN102025028 A CN 102025028A CN 2009101777878 A CN2009101777878 A CN 2009101777878A CN 200910177787 A CN200910177787 A CN 200910177787A CN 102025028 A CN102025028 A CN 102025028A
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Abstract
The invention relates to a three-dimensional double-frequency antenna comprising a first radiation part, a second radiation part, a connecting part, an impedance matching part and a feeding-in part. The second radiation part is arranged below the first radiation part and virtually parallel with the first radiation part. The connecting part is coupled to the first side of the first radiation part, and virtually and perpendicularly extends downward for connecting the first radiation part and the second radiation part. The impedance matching part is coupled to the second side of the first radiation part, the first side and the second side are two corresponding sides, and the impedance matching part virtually and perpendicularly extends downward. The feeding-in part is coupled to the second side and virtually perpendicularly extends downward. The feeding-in part is used for receiving feeding-in signals. The first radiation part operates at first frequency width, the second radiation part operates at second frequency width, and the frequency of the second frequency width is bigger than the frequency of the first radiation part.
Description
Technical field
The present invention is about a kind of three-dimensional dual-band antenna, and particularly about a kind of three-dimensional dual-band antenna with broadband properties.
Background technology
Now, development communication technologies is rapid.In the communications field, antenna is a kind of important element.And antenna is applied in the compact electronic installation of various external forms usually, for example is to be applied in notebook computer or the portable electronic devices.
Antenna can be divided into flat plane antenna and three-dimensional antenna, and it all has the function of reception or emitted radiation electromagnetic field.Generally speaking, three-dimensional antenna can have preferable usefulness.Now the three-dimensional antenna with the receiver radiation electromagnetic field is an example, and its cause description that how to have better performance is as follows.
Antenna is arranged on the circuit board with circuit element usually.Be positioned at the radiation field that antenna received of receiving terminal, launched by the upright antenna of base station usually.Therefore, compared to flat plane antenna, three-dimensional antenna is subjected to the influence of capture-effect of circuit element less.
Moreover the electric current of three-dimensional antenna can be distributed in the current path of horizontal direction and vertical direction.Horizontal direction is the direction parallel with circuit board, and vertical direction then is the direction with the upright day line parallel of base station.So, can only be distributed in the flat plane antenna of the current path of horizontal direction compared to electric current, it is surely right that the upright antenna of three-dimensional antenna and base station has higher radiation field.
Also have, when flat plane antenna receiver radiation electromagnetic field, electric current can be distributed on the current path of horizontal direction, and is sent on the circuit element of circuit board.Because the sense of current of circuit element is generally horizontal direction, so the electric current of flat plane antenna will produce electromagnetic interference, and influences circuit element.Yet when three-dimensional antenna receiver radiation electromagnetic field, electric current can also be distributed on the current path of vertical direction except meeting is distributed on the current path of horizontal direction.So, will reduce the size of current on the current path that is distributed in horizontal direction, and reach the effect of the effect that reduces electromagnetic interference.
Yet the volume of traditional three-dimensional antenna is very big usually, and, if to design one can support two communication frequency ranges three-dimensional dual-band antenna, its volume will be bigger.Moreover, but the communication frequency range of traditional three-dimensional antenna sending and receiving also has certain restriction.Therefore, how to design three-dimensional dual-band antenna, one of problem of endeavouring for industry with small size and broadband properties.
Summary of the invention
The invention relates to a kind of three-dimensional dual-band antenna, can support two communication frequency ranges, and have undersized volume.But the communication frequency range of three-dimensional dual-band antenna sending and receiving of the present invention is very wide, so all have the characteristic of wideband in two communication frequency ranges of being supported.
According to a first aspect of the invention, propose a kind of three-dimensional dual-band antenna, comprise one first Department of Radiation, one second Department of Radiation, a junction, reach a feeding portion.Second Department of Radiation is positioned at first Department of Radiation below, and is parallel to first Department of Radiation in fact.Connecting portion is coupled to a first side of first Department of Radiation, and extends in fact vertically downward, to connect first Department of Radiation and second Department of Radiation.First Department of Radiation operates in one first frequency range, and second Department of Radiation is operated one second frequency range, and the frequency of second frequency range is greater than the frequency of first frequency range.Feeding portion is coupled to a second side of first Department of Radiation, and extends in fact vertically downward.Feeding portion is in order to receive a FD feed.First side and second side are corresponding dual-sides.
A kind of three-dimensional dual-band antenna of the present invention, preferably, first Department of Radiation be shaped as a quadrangle or rectangle.
A kind of three-dimensional dual-band antenna of the present invention, preferably, second Department of Radiation be shaped as a strip.
A kind of three-dimensional dual-band antenna of the present invention, preferably, the length of second Department of Radiation is greater than the length of the first side of first Department of Radiation.
A kind of three-dimensional dual-band antenna of the present invention, preferably, connecting portion can be used as one first support portion of three-dimensional dual-band antenna.
A kind of three-dimensional dual-band antenna of the present invention, preferably, feeding portion is positioned at the middle place of the second side of first Department of Radiation.
A kind of three-dimensional dual-band antenna of the present invention, preferably, feeding portion can be used as one second support portion of three-dimensional dual-band antenna.
A kind of three-dimensional dual-band antenna of the present invention also comprises a circuit board, the FD feed that the feeding portion circuit board for receiving is provided.
A kind of three-dimensional dual-band antenna of the present invention also comprises a ground plane, ground plane be the position on circuit board, preferably, ground plane is not arranged on the below of three-dimensional dual-band antenna.
A kind of three-dimensional dual-band antenna of the present invention also comprises an impedance matching portion, and impedance matching portion is coupled to the second side of first Department of Radiation, and extends in fact vertically downward, by the impedance matching of the whole three-dimensional dual-band antenna of the adjustable size that changes impedance matching portion.
A kind of three-dimensional dual-band antenna of the present invention, preferably, impedance matching portion is shaped as a quadrangle or rectangle.
A kind of three-dimensional dual-band antenna of the present invention, preferably, impedance matching portion can be used as one the 3rd support portion of three-dimensional dual-band antenna.
A kind of three-dimensional dual-band antenna of the present invention also comprises a fluting, and fluting is arranged on one the 3rd side of first Department of Radiation, can increase the frequency range of the operation of first Department of Radiation.Wherein the two ends of the 3rd side are that first side and second side connect.
A kind of three-dimensional dual-band antenna of the present invention, preferably, fluting be shaped as groove without leave the 3rd side to the gradually narrow trapezoidal or triangle in the first Department of Radiation inside.
A kind of three-dimensional dual-band antenna of the present invention, preferably, fluting is arranged on the 3rd side of first Department of Radiation, and contiguous first side.
A kind of three-dimensional dual-band antenna of the present invention, preferably, the width of second Department of Radiation is less than the width of the 3rd side of first Department of Radiation
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1A illustrates the structure chart according to the three-dimensional dual-band antenna of one embodiment of the invention.
Figure 1B illustrates many views of the three-dimensional dual-band antenna of Figure 1A.
Fig. 2 illustrate Figure 1A three-dimensional dual-band antenna and one of couple the structure chart of circuit board.
Fig. 3 illustrates the standing-wave ratio oscillogram of the three-dimensional dual-band antenna of Fig. 2.
The three-dimensional dual-band antenna that Fig. 4 A～4C illustrates Fig. 2 respectively operates in communication frequency range 2.40GHz, 2.45GHz, the vertical field pattern figure when reaching 2.50GHz.
The three-dimensional dual-band antenna that Fig. 5 A～5D illustrates Fig. 2 respectively operates in communication frequency range 5.15GHz, 5.35GHz, 5.75GHz, the vertical field pattern figure when reaching 5.85GHz.
The main element symbol description
100: three-dimensional dual-band antenna
110: the first Departments of Radiation
112: fluting
120: the second Departments of Radiation
130: connecting portion
140: impedance matching portion
150: feeding portion
160: circuit board
162: ground plane
L1, L2: length
W1, W2: width
S1～S3: side
Embodiment
Please refer to Figure 1A, it illustrates the structure chart according to the three-dimensional dual-band antenna of one embodiment of the invention.Three-dimensional dual-band antenna 100 comprises that one first Department of Radiation 110, one second Department of Radiation 120, a junction 130, an impedance join a portion 140, an and feeding portion 150.
The shape of first Department of Radiation 110 for example is a quadrangle or rectangle.First Department of Radiation 110 for example has fluting (slot) 112.Fluting for example is arranged on a side S3 of first Department of Radiation 110, can increase the frequency range of the operation of first Department of Radiation 110.The two ends of this side S3 are that a side S1 and a side S2 connect.Fluting 112 shape for example be groove directly groove without leave side S3 to the gradually narrow trapezoidal or triangle in first Department of Radiation, 110 inside.Preferably, fluting can be arranged on the side S3 and the adjacent side S1 part of first Department of Radiation 110.So, can increase the exercisable frequency range of first Department of Radiation 110 in fact.But the present invention is not limited to this.As long as can on first Department of Radiation 110, a fluting be set, use increase by first Department of Radiation 100 and can operate frequency range, all in protection scope of the present invention.
Second Department of Radiation 120 is positioned at first Department of Radiation, 110 belows, and is parallel to first Department of Radiation 110 in fact.The shape of second Department of Radiation 120 for example is a strip.Shown in Figure 1A, the length L 2 of second Department of Radiation 120 is greater than the length L 1 of first Department of Radiation 110, and the width W 2 of second Department of Radiation 120 is less than the width W 1 of first Department of Radiation 110.
Connecting portion 130 is coupled to the side S1 of first Department of Radiation 110, and extends in fact vertically downward, to connect first Department of Radiation 110 and second Department of Radiation 120.Connecting portion can be used as one first support portion of three-dimensional dual-band antenna.
Please refer to Fig. 2, its illustrate Figure 1A three-dimensional dual-band antenna and one of couple the structure chart of circuit board.Feeding portion 150 for example is coupled to circuit board 160 via the end of h shape, and second Department of Radiation 120 is attached in fact on the circuit board 160.This circuit board 160 is in order to provide a FD feed.Feeding portion 150 is in order to receive this FD feed.
For instance, circuit board 160 has a ground plane (ground plane) 162.This ground plane 162 is that the position is on circuit board 160, shown in the dotted line scope of Fig. 2.In a plasticity embodiment, preferably, ground plane 162 for example is not arranged on the below of three-dimensional dual-band antenna 100.So, three-dimensional dual-band antenna 100 can become an one pole (monopole) antenna with respect to ground plane 162.
Please refer to aforesaid Figure 1A.In practice, first Department of Radiation 110 is in order to providing one first resonance frequency, and second Department of Radiation 120 is in order to provide one second resonance frequency.Second resonance frequency is greater than first resonance frequency.This two resonance frequency for example is contained in the two communication frequency ranges, and this two communication frequency range is via motor and electronics engineers (The Institute of Electrical and Electronics Engineers, IEEE) defined communication frequency range among communication protocol 802.11 a/b/g/n of Zhi Dinging.
Carefullyyer say that detailedly first Department of Radiation 110 operates in one first frequency range, first frequency range is essentially 2.1GHz to 3.1GHz.Second Department of Radiation, 120 operations, one second frequency range, second frequency range is essentially 4.9GHz to 5.85GHz.So, three-dimensional dual-band antenna 10 can support 2.4 to 2.5 ten hundred million hertz of frequency ranges of communication (Giga Herz, GHz) and the data transmission of communication frequency range 4.9GHz to 5.85GHz.Now describe with a plurality of test waveform figure.
Please refer to Fig. 3, it illustrates the standing-wave ratio oscillogram of three-dimensional dual-band antenna of the present invention.(Standing Wave Ratio SWR) approximates 2 reference line L as can be known, and first frequency range is in fact between 2.1GHz to 3.1GHz according to standing-wave ratio; Second frequency range is in fact between 4.9GHz to 5.85GHz.First frequency range comprises defined LF communication frequency range 2.4GHz to 2.5GHz among communication protocol 802.11 a/b/g/n in fact, and second frequency range comprises defined HF communication frequency range 4.9GHz to 5.85GHz among communication protocol 802.11 a/b/g/n in fact.
As shown in Figure 3, frequency equal 2.4GHz, 2.45GHz, 2.5GHz, 4.9GHz, and the actual SWR numerical value of 5.85GHz (in Fig. 3 respectively with measurement point 1～5 expression) be respectively 1.4720,1.4775,1.5575,1.3436 and 2.4756.Hence one can see that, and the three-dimensional dual-band antenna 100 of present embodiment can be supported the data transmission of logical fortune agreement 802.11 a/b/g/n effectively.
Moreover three-dimensional dual-band antenna 100 of the present invention has broadband properties, and can be referred to as wide frequency antenna, now is described as follows.Because the centre frequency frequency range ratio (ratio of frequency range and centre frequency) of wide frequency antenna is usually greater than 15%, and in three-dimensional dual-band antenna 100 of the present invention, the frequency range of first frequency range is about 1GHz (3.1GHz-2.1GHz=1GHz), suppose that centre frequency is 2.5G, so can know by inference, the centre frequency frequency range ratio of first frequency range is 40% (1G/2.5 G=40%).This numerical value 40% is greater than 15%, so three-dimensional dual-band antenna 100 can have the characteristic of wideband in first frequency range.Similarly, the frequency range of second frequency range also approaches 1GHz (5.85GHz-4.9GHz=0.95GHz), and the centre frequency frequency range ratio of second frequency range is also greater than 15%, so three-dimensional dual-band antenna 100 also has the characteristic of wideband in second frequency range.
Now provide the vertical field pattern figure of gain of three-dimensional dual-band antenna 100 as follows.The three-dimensional dual-band antenna 100 that Fig. 4 A～4C illustrates Fig. 2 respectively operates in communication frequency range 2.40GHz, 2.45GHz, the vertical field pattern figure when reaching 2.50GHz.The three-dimensional dual-band antenna 100 that Fig. 5 A～5D illustrates Fig. 2 respectively operates in communication frequency range 5.15GHz, 5.35GHz, 5.75GHz, the vertical field pattern figure when reaching 5.85GHz.By Fig. 4 A～4C and 5A～5D as can be known, among defined LF communication frequency range 2.4GHz to 2.5GHz and the HF communication frequency range 4.9GHz to 5.85GHz, three-dimensional dual-band antenna 100 of the present invention all has good radianting capacity in communication protocol 802.11 a/b/g/n.
Please refer to Figure 1B, it illustrates many views of the three-dimensional dual-band antenna 100 of 1A.In this embodiment, this three-dimensional dual-band antenna 100 has undersized volume, and its length is about 19 millimeters, and width is about 9 millimeters, and the degree of depth is about 4.5 millimeters.Moreover the length with bottom of leg-of-mutton fluting 112 is about 2.6 millimeters, and the shape of impedance matching portion 140 for example is a rectangle, and its length is about 5.0 millimeters, and width is about 2.0 millimeters.The material of three-dimensional dual-band antenna 100 for example comprises metal, so three-dimensional dual-band antenna of the present invention 100 can be used as the metal dual-band antenna 100 of a solid.Three-dimensional dual-band antenna 100 of the present invention applicable to one hand-held (handheld) device or a USB (Universal Serial Bus, USB) among.
The disclosed three-dimensional dual-band antenna of the above embodiment of the present invention can be supported two communication frequency ranges, and be had undersized volume.But the communication frequency range of three-dimensional dual-band antenna sending and receiving of the present invention is very wide, so all have the characteristic of wideband in two communication frequency ranges of being supported.
In sum, though the present invention with a preferred embodiment openly as above, it is not in order to limit the present invention.The technical staff of the technical field of the invention, without departing from the spirit and scope of the present invention, when doing various modifications and retouching.Therefore, protection scope of the present invention is as the criterion with the claim restricted portion.
Claims (21)
1. three-dimensional dual-band antenna comprises:
One first Department of Radiation;
One second Department of Radiation is positioned at this first Department of Radiation below, and is parallel to this first Department of Radiation in fact, and first Department of Radiation operates in one first frequency range, and second Department of Radiation operates in one second frequency range, and the frequency of second frequency range is greater than the frequency of first frequency range;
A junction is coupled to a first side of this first Department of Radiation, and extends in fact vertically downward, to connect this first Department of Radiation and this second Department of Radiation;
One impedance matching portion is coupled to a second side of this first Department of Radiation, and extends in fact vertically downward, and wherein this first side and this second side are corresponding dual-side; And
One feeding portion is coupled to this second side of this first Department of Radiation, and extends in fact vertically downward, and this feeding portion is in order to receive a FD feed.
2. three-dimensional dual-band antenna according to claim 1, wherein this connecting portion and one first support portion that can be used as this three-dimensional dual-band antenna.
3. three-dimensional dual-band antenna according to claim 1, this first frequency range is essentially 2.1GHz to 3.1GHz, and this second frequency range is essentially 4.9GHz to 5.85GHz.
4. three-dimensional dual-band antenna according to claim 1, wherein this first Department of Radiation has a fluting.
5. three-dimensional dual-band antenna according to claim 4, wherein this fluting of this first Department of Radiation is arranged on one the 3rd side of this first Department of Radiation, and near this first side;
Wherein, the two ends of the 3rd side are that this first side and this second side connect.
6. three-dimensional dual-band antenna according to claim 4, wherein this fluting of this first Department of Radiation be shaped as groove without leave the 3rd side to the gradually narrow trapezoidal or triangle in this first Department of Radiation inside.
7. three-dimensional dual-band antenna according to claim 6, wherein the length of the bottom of this fluting is about 2.6 millimeters.
8. three-dimensional dual-band antenna according to claim 1, wherein this first Department of Radiation is shaped as quadrangle or rectangle.
9. three-dimensional dual-band antenna according to claim 1, wherein this second Department of Radiation is shaped as strip.
10. three-dimensional dual-band antenna according to claim 1, wherein the length of this second Department of Radiation is greater than the length of this first Department of Radiation, and the width of this second Department of Radiation is less than the width of this first Department of Radiation.
11. three-dimensional dual-band antenna according to claim 1, wherein this impedance matching portion is with so that this second Department of Radiation reaches impedance matching.
12. three-dimensional dual-band antenna according to claim 1, wherein this impedance matching portion is essentially quadrangle or rectangle, and its length is about 5.0 millimeters, and width is about 2.0 millimeters.
13. three-dimensional dual-band antenna according to claim 1, wherein this feeding portion is positioned at the centre near this second side, and this impedance matching portion is positioned at a side of this feeding portion, and this connecting portion is relative with this impedance matching portion.
14. three-dimensional dual-band antenna according to claim 1, wherein this feeding portion can be used as one second support portion of this three-dimensional dual-band antenna.
15. three-dimensional dual-band antenna according to claim 1, wherein impedance matching portion can be used as one the 3rd support portion of this three-dimensional dual-band antenna.
16. three-dimensional dual-band antenna according to claim 1, wherein this feeding portion is coupled to the circuit board that this FD feed is provided.
17. three-dimensional dual-band antenna according to claim 15, wherein this circuit board has a ground plane, and ground plane is not arranged on the below of three-dimensional dual-band antenna, so that this dual-band antenna becomes a unipole antenna with respect to this ground plane.
18. three-dimensional dual-band antenna according to claim 15, wherein this second Department of Radiation is attached in fact on this circuit board.
19. three-dimensional dual-band antenna according to claim 1, wherein the material of this dual-band antenna comprises metal.
20. three-dimensional dual-band antenna according to claim 1 is applicable among a hand-hold device or the USB.
21. three-dimensional dual-band antenna according to claim 1, wherein this first Department of Radiation provides one first resonance frequency, and this second Department of Radiation provides one second resonance frequency, and this second resonance frequency is greater than this first resonance frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910177787.8A CN102025028B (en) | 2009-09-23 | 2009-09-23 | Three-dimensional double-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910177787.8A CN102025028B (en) | 2009-09-23 | 2009-09-23 | Three-dimensional double-frequency antenna |
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| Publication Number | Publication Date |
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| CN102025028A true CN102025028A (en) | 2011-04-20 |
| CN102025028B CN102025028B (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910177787.8A Expired - Fee Related CN102025028B (en) | 2009-09-23 | 2009-09-23 | Three-dimensional double-frequency antenna |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI550953B (en) * | 2015-03-05 | 2016-09-21 | 智易科技股份有限公司 | Monopole antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050057400A1 (en) * | 2003-09-01 | 2005-03-17 | Alps Electric Co., Ltd. | Dual-band antenna having small size and low height |
| TWM286998U (en) * | 2005-09-16 | 2006-02-01 | Inpaq Technology Co Ltd | Antenna having composite function |
| CN101527387A (en) * | 2008-03-04 | 2009-09-09 | 广达电脑股份有限公司 | Multiple frequency antenna |
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2009
- 2009-09-23 CN CN200910177787.8A patent/CN102025028B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050057400A1 (en) * | 2003-09-01 | 2005-03-17 | Alps Electric Co., Ltd. | Dual-band antenna having small size and low height |
| TWM286998U (en) * | 2005-09-16 | 2006-02-01 | Inpaq Technology Co Ltd | Antenna having composite function |
| CN101527387A (en) * | 2008-03-04 | 2009-09-09 | 广达电脑股份有限公司 | Multiple frequency antenna |
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| CN102025028B (en) | 2014-04-09 |
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Granted publication date: 20140409 Termination date: 20170923 |