CN104134857A - Eight-frequency-band plane printing mobile phone antenna - Google Patents
Eight-frequency-band plane printing mobile phone antenna Download PDFInfo
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- CN104134857A CN104134857A CN201410376755.1A CN201410376755A CN104134857A CN 104134857 A CN104134857 A CN 104134857A CN 201410376755 A CN201410376755 A CN 201410376755A CN 104134857 A CN104134857 A CN 104134857A
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Abstract
The invention discloses an eight-frequency-band plane printing mobile phone antenna which comprises a dielectric slab, a main floor, a parasitism ground branch, an exciting unit and a signal feed-in line. The main floor and the parasitism ground branch are printed on one face of the dielectric slab, and the exciting unit and the signal feed-in line are printed on the other face of the dielectric slab. The main floor is directly connected with the parasitism ground branch, and an L-shaped gap is formed between the main floor and the parasitism ground branch. An L-shaped open slot is formed in the tail end of the parasitism ground branch. The exciting unit comprises a first branch, a second branch and a third branch, and the first branch, the second branch and the third branch are all directly connected with the signal feed-in line. The mobile phone antenna is of a plane structure, the plane printing technology can be adopted, multiple resonance points are utilized for broadening bandwidths, all the resonance points can be conveniently adjusted, two wide bandwidths are formed at the low low-frequency band and the high-frequency band, and therefore all mobile phone frequency bands of the current 4G communication are covered. Compared with the prior art, the eight-frequency-band plane printing mobile phone antenna has the advantages of being of the two-dimensional structure, having multi-frequency-band wide bands and being easy to adjust, and is applicable to various small-size mobile terminals represented by mobile phones.
Description
Technical field
The present invention relates to a kind of mobile terminal antenna, relate in particular to a kind of eight frequency range planographic antenna for mobile phone.
Background technology
Along with the develop rapidly of mobile communication technology, mobile phone has become one of the most universal consumption electronic product in the whole world.The function of mobile phone also develops into the current integrated service as master such as network, numeral, multimedia video of take from single speech business.Consider that the communication protocol of employing all over the world and the frequency range of division are not quite similar, in order to realize global roaming, mobile terminal antenna needs to support multi-protocols and multiband to cover.On the basis of 2G and 3G, the 4G that current preliminary drops into business has divided more frequency range to realize higher data transmission.The frequency range that 4G covers has LTE700 (698-784MHz), GSM850 (824-894MHz), GSM900 (880-960MHz), DCS (1710-1880MHz), PCS (1850-1990MHz), UMTS (1920-2170MHz), LTE2300 (2300-2400MHz), LTE2500 (2500-2690MHz).Therefore, support the mobile terminal antenna of 4G generally need to cover this low-frequency range of 698-960MHz and this high band of 1710-2690MHz.
The enough spaces of performance need of antenna guarantee.In order to cover above-mentioned two frequency ranges, typical method for designing is to adopt three-dimensional structure, as PIFA antenna and folded monopole sub antenna.This class antenna has the more degree of freedom adjustable, generally can meet frequency range coverage requirement.But three-dimensional structure is unfavorable for processing and highly integrated, and can not adapt to the trend that current phone thickness is more and more thinner.Planographic antenna for mobile phone receives increasing concern.In design, planar printed antenna adopts two details that length is close conventionally.The basic mode of these two details is combined, and covers this low-frequency range of 698-960MHz; The higher mode of these two details is combined, and covers this high band of 1710-2690MHz.This design can regulate the basic mode of two details easily, but higher mode is difficult to independent regulation, has increased the complexity of debugging.Therefore, design meets that 4G frequency range requires and low-frequency range and high band can have very important significance compared with the planographic antenna for mobile phone of independent regulation.
Summary of the invention
For overcoming the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of planographic antenna for mobile phone that can cover all frequency ranges of 4G; Adopt the mode of a plurality of mode combinations to expand the bandwidth of low-frequency range and high band, and each pattern in low-frequency range and high band can regulate comparatively independently.
In order to realize above-mentioned functions, the technical solution used in the present invention is:
Eight frequency range planographic antenna for mobile phone, comprise dielectric-slab 6, are printed in the main floor 1 of dielectric-slab 6 one side and branch 3 and the signal feed-in line 2 and the exciting unit 4 that are printed in dielectric-slab 6 another sides autoeciously, wherein:
Described main floor 1 is connected with branch 3 autoeciously;
In described branch autoeciously 3, have L shaped open circuit groove 5;
Described exciting unit 4 comprises the first 4a of branch, the second 4b of branch and the 4c of San branch, and wherein said the first 4a of branch is L shaped, and described the second 4b of branch and the 4c of San branch are vertical bar shaped, and described the second 4b of branch and the 4c of San branch are parallel to each other;
Described signal feed-in line 2 is all directly connected with the first 4a of branch, the second 4b of branch, the 4c of San branch.
Described main floor 1 and have autoeciously L shaped space between branch 3, the Yu Gai space, position of described signal feed-in line 2 and exciting unit 4 is corresponding.
Described the first 4a of branch is by one end of the first arm and vertical the connecting and composing in one end of the second arm, the other end of described the second arm connects one end of the second 4b of branch, signal feed-in line 2 one end are vertically connected on described the second arm, the projection of the other end is positioned on main floor 1, one end of the 4c of San branch is vertically connected on signal feed-in line 2, and the 4c of San branch and the second 4b of branch are positioned at the homonymy of signal feed-in line 2.
Described signal feed-in line 2 all equates with the first 4a of branch, second 4b of branch of exciting unit 4, the live width of the 4c of San branch.
Described L shaped open circuit groove 5 is positioned at the end of branch 3 autoeciously, and the width of the metal part of open circuit flute length arm both sides is equal, and open circuit flute length arm equates with the width of galianconism, and the direction of channel opening is parallel with the first arm of the first 4a of branch of exciting unit 4.
The second 4b of branch and the 4c of San branch of described exciting unit 4 are positioned at described L shaped space.
The microstrip line Partial Feature impedance of described signal feed-in line 2 projections above main floor 1 is 50 ohm.
Perforate on described main floor 1, with the coaxial line direct feed of 50 ohm, the inner wire of coaxial line is connected with exciting unit 4, and outer conductor is connected with main floor 1.
0.25 λ pattern resonance of described branch autoeciously 3 is near 720MHz, and 0.75 λ pattern resonance is near 1750MHz; The 0.25 λ pattern resonance of the second 4b of branch of described exciting unit 4 is near 920MHz, and the 0.25 λ pattern resonance of the 4c of San branch is near 2900MHz; 0.25 λ pattern resonance of described L shaped open circuit groove 5 is near 2450MHz.
Compared with prior art, the invention has the beneficial effects as follows:
(1) by the structure of plane, cover eight frequency ranges such as GSM700, GSM850, GSM900, DCS, PCS, UMTS, LTE2300, LTE2500, met the demand of 4G communication.
(2) planar dimension of antenna is 15mm * 60mm, and the size taking is less, and available planographic technique reduces costs.
(3) antenna is simple in structure, and debugging is convenient, and mode of operation is clear, and the pattern in each frequency range can regulate more freely.
Accompanying drawing explanation
Fig. 1 is eight frequency range planographic antenna for mobile phone floor map provided by the invention.
Fig. 2 is the embodiment vertical view after antenna installation in Fig. 1, and unit is millimeter (mm).
Fig. 3 is the embodiment upward view after antenna installation in Fig. 1, and unit is millimeter (mm).
Fig. 4 is the embodiment end view after antenna installation in Fig. 1, and unit is millimeter (mm).
Fig. 5 is the stickogram that in Fig. 1, antenna is installed rear embodiment emulation.
Fig. 6 is the radiation efficiency figure that in Fig. 1, antenna is installed rear embodiment emulation.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is described in further details.
Fig. 1 is the structural representation of eight frequency range planographic antenna for mobile phone of the present invention, and as shown in Figure 1, eight frequency range planographic antenna for mobile phone of the present invention comprise: dielectric-slab 6, main floor 1, signal feed-in line 2, detail 3, exciting unit 4 autoeciously.Main floor 1 and autoeciously detail 3 are printed in a side of dielectric-slab 6, and signal feed-in line 2 and exciting unit 4 are printed in the opposite side of dielectric-slab.Main floor 1 is for the circuit board of analogue mobile phone.On detail 3, have autoeciously L shaped open circuit groove 5.Exciting unit 4 comprises and the first 4a of branch, the second 4b of branch, the 4c of San branch, and Qie Zhesange branch is all directly connected with signal feed-in line 2.The microstrip line Partial Feature impedance that signal feed-in line 2 is positioned on main floor 1 is 50 ohm.
Technical scheme of the present invention is achieved in that
First be the covering that realizes low-frequency range (698-960MHz).Branch 3 produces resonance at 720MHz place autoeciously, and branch 3 is about 0.25 λ in effective electrical length at this Frequency point place autoeciously, is therefore operated in basic mode pattern.The 4c of San branch of exciting unit 4 produces resonance at 920MHz place, the 4c of San branch is about 0.25 λ in effective electrical length at this Frequency point place, is therefore operated in basic mode pattern.These two basic modes, due to interactions such as couplings, can form a wider bandwidth, realize the covering of low-frequency range.Because the resonance frequency of these two basic modes is mainly determined by effective electrical length separately, therefore can regulate more independently length separately to regulate two modes of resonance of low-frequency range.
Next is the covering that realizes high band (1710-2690MHz).The 4c of San branch of branch 3 and exciting unit 4, when low-frequency range produces basic mode, also can produce mould three times at high band autoeciously.Consider that the bandwidth that these two tertiary modes provide is not enough to cover whole high frequency, and the adjusting of these two three moulds is subject to the impact of the adjusting of basic mode, can not be compared with independent regulation, new resonant element is introduced into spread bandwidth and regulates the pattern in high band.Particularly, be carved with autoeciously L shaped open circuit groove 5 in branch 3, this open circuit groove produces resonance at 2450MHz place, and this open circuit groove is about 0.25 λ in effective electrical length at this Frequency point place, is therefore operated in basic mode pattern.The second 4b of branch of exciting unit 4 produces resonance at 2750MHz place, this branch is about 0.25 λ in effective electrical length at this Frequency point place, is therefore operated in basic mode pattern.On the other hand, three of branch 3 moulds are pulled down to 1750MHz by these two the new resonant elements of introducing autoeciously, more than three moulds of the 4c of San branch of exciting unit 4 are drawn high 3000MHz.Three of branch 3 moulds, the basic mode of L shaped open circuit groove 5, four patterns such as three moulds of the 4c of San branch of the basic mode of the second 4b of branch of exciting unit 4 and exciting unit 4 are due to interactions such as couplings autoeciously, can form a wider bandwidth, realize the covering of high band.And the basic mode of the second 4b of branch of the basic mode of L shaped open circuit groove 5 and exciting unit 4 can independent regulation, on the almost not impact of two of low-frequency range basic modes.The first branch of exciting unit 4 is for regulating intercoupling of four modes of resonance of high band, thus the impedance matching of optimization high band.
In order to verify the present invention program's validity, provide instantiation below and describe.
Fig. 2 to Fig. 4 provided embodiment overlooking, look up with the different angles such as side-looking under dimensional drawing, in each figure, the unit of all sizes is millimeter (mm).In this embodiment, the FR4 medium substrate that select that relative dielectric constant is 4.4, loss angle tangent is 0.02, thickness is 0.8mm, the planar dimension of substrate is 120*60mm
2.The planar dimension on main floor is 105*60*60mm
2.Antenna integral body is planar structure, is positioned at a side on main floor, and the planar dimension taking is 15*60mm
2.The microstrip line Partial Feature impedance that signal feed-in line 2 is positioned on main floor 1 is 50 ohm.In reality is implemented, can proper extension to radio frequency feed-in part in circuit, also can perforate on main floor, with the coaxial line direct feed of 50 ohm.The inner wire of coaxial line is connected with exciting unit, and outer conductor is connected with main floor.
The result of the reflection coefficient of the antenna for mobile phone emulation made from above-mentioned Fig. 2, Fig. 3 and Fig. 4 illustrated dimension as shown in Figure 5.As seen from the figure, this planar printed antenna has two resonance points in low-frequency range, formation-6dB bandwidth is 688-1045MHz, has covered these three frequency ranges of LTE700, GSM850 and GSM900.This planar printed antenna has four resonance points at high band, formation-6dB bandwidth is from 1685MHz to higher than 3000MHz, covered these five frequency ranges of DCS, PCS, UMTS, LTE2300 and LTE2500.
The radiation efficiency result of the antenna for mobile phone emulation made from above-mentioned Fig. 2, Fig. 3 and Fig. 4 illustrated dimension as shown in Figure 6.Described antenna for mobile phone is about 80% in the radiation efficiency of low-frequency range, in the radiation efficiency of high band, between 70%-90%, fluctuates.
From technique scheme, antenna for mobile phone of the present invention is at 60 * 15mm
2plane space in realized the covering of eight mobile phone frequency ranges, and each pattern is conveniently adjusted, meets the design requirement of mobile communication system to the multi-frequency plane printed antenna for mobile terminal.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (9)
1. a frequency range planographic antenna for mobile phone, it is characterized in that, comprise dielectric-slab (6), be printed in the main floor (1) of dielectric-slab (6) one side and branch (3) and the signal feed-in line (2) and the exciting unit (4) that are printed in dielectric-slab (6) another side autoeciously, wherein:
Described main floor (1) is connected with branch (3) autoeciously;
In described branch autoeciously (3), have L shaped open circuit groove (5);
Described exciting unit (4) comprises the first branch (4a), the second branch (4b) and San branch (4c), wherein said the first branch (4a) is L shaped, described the second branch (4b) and San branch (4c) are vertical bar shaped, and described the second branch (4b) and San branch (4c) are parallel to each other;
Described signal feed-in line (2) is all directly connected with the first branch (4a), the second branch (4b), San branch (4c).
2. eight frequency range planographic antenna for mobile phone according to claim 1, it is characterized in that, described main floor (1) and have L shaped space between branch (3) autoeciously, the Yu Gai space, position of described signal feed-in line (2) and exciting unit (4) is corresponding.
3. eight frequency range planographic antenna for mobile phone according to claim 2, it is characterized in that, described the first branch (4a) is by one end of the first arm and vertical the connecting and composing in one end of the second arm, the other end of described the second arm connects one end of the second branch (4b), signal feed-in line (2) one end is vertically connected on described the second arm, the projection of the other end is positioned on main floor (1), it is upper that one end of San branch (4c) is vertically connected on signal feed-in line (2), and San branch (4c) and the second branch (4b) are positioned at the homonymy of signal feed-in line (2).
4. according to eight frequency range planographic antenna for mobile phone described in claim 1 or 3, it is characterized in that, the live width of first branch (4a) of described signal feed-in line (2) and exciting unit (4), the second branch (4b), San branch (4c) all equates.
5. eight frequency range planographic antenna for mobile phone according to claim 3, it is characterized in that, described L shaped open circuit groove (5) is positioned at the end of branch (3) autoeciously, the width of the metal part of open circuit flute length arm both sides equates, open circuit flute length arm equates with the width of galianconism, and the direction of channel opening is parallel with the first arm of first branch (4a) of exciting unit (4).
6. according to eight frequency range planographic antenna for mobile phone described in claim 2 or 3 or 5, it is characterized in that, the second branch (4b) and the San branch (4c) of described exciting unit (4) are positioned at described L shaped space.
7. eight frequency range planographic antenna for mobile phone according to claim 3, is characterized in that, the microstrip line Partial Feature impedance of described signal feed-in line (2) projection above main floor (1) is 50 ohm.
8. eight frequency range planographic antenna for mobile phone according to claim 7, it is characterized in that, the upper perforate on described main floor (1), with the coaxial line direct feed of 50 ohm, the inner wire of coaxial line is connected with exciting unit (4), and outer conductor is connected with main floor (1).
9. eight frequency range planographic antenna for mobile phone according to claim 1, is characterized in that, 0.25 λ pattern resonance of described branch autoeciously (3) is near 720MHz, and 0.75 λ pattern resonance is near 1750 MHz; 0.25 λ pattern resonance of second branch (4b) of described exciting unit (4) is near 920MHz, and 0.25 λ pattern resonance of San branch (4c) is near 2900MHz; 0.25 λ pattern resonance of described L shaped open circuit groove (5) is near 2450MHz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410376755.1A CN104134857B (en) | 2014-08-01 | 2014-08-01 | A kind of eight frequency range planographic antenna for mobile phone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410376755.1A CN104134857B (en) | 2014-08-01 | 2014-08-01 | A kind of eight frequency range planographic antenna for mobile phone |
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| CN104134857A true CN104134857A (en) | 2014-11-05 |
| CN104134857B CN104134857B (en) | 2016-05-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016155591A1 (en) * | 2015-03-31 | 2016-10-06 | Byd Company Limited | Antenna and mobile terminal having the same |
| CN108682958A (en) * | 2018-05-18 | 2018-10-19 | 中国计量大学 | A kind of antenna for mobile phone of narrow frame |
| CN110649371A (en) * | 2019-09-27 | 2020-01-03 | 西南交通大学 | Antenna and mobile terminal equipment thereof |
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| CN103346393A (en) * | 2013-06-17 | 2013-10-09 | 清华大学 | Multi-frequency plane printed antenna comprising protruded floor and applied to mobile terminal |
| CN103490155A (en) * | 2013-09-24 | 2014-01-01 | 西安电子科技大学 | Four-frequency-band printed antenna applied to wireless communications |
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2014
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| EP0714151A1 (en) * | 1994-11-22 | 1996-05-29 | France Telecom | Broadband monopole antenna in uniplanar printed circuit technology and transmit- and/or receive device with such an antenna |
| JP2006115182A (en) * | 2004-10-14 | 2006-04-27 | Alps Electric Co Ltd | Pattern antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016155591A1 (en) * | 2015-03-31 | 2016-10-06 | Byd Company Limited | Antenna and mobile terminal having the same |
| US10361477B2 (en) | 2015-03-31 | 2019-07-23 | Byd Company Limited | Antenna and mobile terminal having the same |
| CN108682958A (en) * | 2018-05-18 | 2018-10-19 | 中国计量大学 | A kind of antenna for mobile phone of narrow frame |
| CN110649371A (en) * | 2019-09-27 | 2020-01-03 | 西南交通大学 | Antenna and mobile terminal equipment thereof |
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| CN104134857B (en) | 2016-05-18 |
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