CN105406174A - LTE multi-frequency-band antenna and mobile terminal - Google Patents
LTE multi-frequency-band antenna and mobile terminal Download PDFInfo
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Abstract
The invention belongs to the technical field of communication, and especially relates to an LTE multi-frequency-band antenna and a mobile terminal. The LTE multi-frequency-band antenna comprises an antenna main body part, a first branch part and a second branch part; the antenna main body part is provided with a feeding point (101) and a first grounding point (102), and a first high-frequency band is covered through resonance; the first branch part and the antenna main body part are spaced by a first gap, the antenna main body part performs coupling feeding through the first gap, and is resonant at a first resonance frequency point (f1) to cover a first low-frequency band; and the second branch part and the antenna main body are spaced by a second gap, the antenna main body performs coupling feeding through a second gap, and is resonant at a second resonance frequency point (f2) to cover a second low-frequency band. The technical scheme adopts a double coupling feeding mode, the antenna bandwidth can be effectively increased, an antenna resonance main body is relatively clear, and antenna analyses and debugging are easy.
Description
Technical field
The invention belongs to communication technical field, particularly relate to a kind of multiband aerial.
Background technology
In today of mobile communication technology fast development, mobile phone terminal has more and more embodied its powerful advantage as indispensable equipment in people's life and the life efficiency of people is greatly improved, antenna for mobile phone is as parts indispensable in communication system, and the excellent of antenna performance directly determines whole cell phone system performance.And enriching constantly along with cell-phone function, more propose new requirement to antenna for mobile phone design.Particularly along with 4G (the4thgenerationcommunicationsystem, forth generation mobile communication technology) LTE (LongTermEvolution, Long Term Evolution) commercial rollout of network, require that mobile phone terminal is supporting traditional 2G (the2ndGenerationcommunicationsystem, Generation Mobile Telecommunication System technology), 3G (the3rdGenerationcommunicationsystem, G mobile communication) communications band basis on, also support 4G communications band simultaneously, this adds the design difficulty of antenna for mobile phone undoubtedly, especially mobile phone terminal if the country such as American-European will be supported to use FDD-LTEBand17 and FDD-LTEBand28 technology time, further add the design difficulty of terminal antenna.
Summary of the invention
For above technical problem, provide a kind of LTE multiband aerial, to solve the antenna for mobile phone narrow bandwidth of prior art, can not cover multiband, antenna for mobile phone can not the problem of multi-mode working;
Concrete technical scheme is as follows:
A kind of LTE multiband aerial, wherein, comprises,
One antenna body portion, described antenna body portion is arranged distributing point (101) and the first earth point (102), by resonance to cover one first high-frequency band;
One first branch, and one first gap that is separated by between described antenna body portion, described antenna body portion by described first aperture-coupled, and resonance in one first resonant frequency point (f1) to cover one first low frequency frequency range;
One second branch, and one second gap that is separated by between described antenna body portion, described antenna body portion by described second aperture-coupled, and resonance in one second resonant frequency point (f2) to cover one second low frequency frequency range.
Above-mentioned LTE multiband aerial, described antenna body portion comprises,
One first radiation arm (105), described first radiation arm (105) is upper draws described distributing point (101);
One the 3rd radiation arm (107), described 3rd radiation arm (107) is arranged near described second branch, and and described second gap that is separated by between described second branch;
One second radiation arm (106), for connecting described first radiation arm (105) and described 3rd radiation arm (107), described second radiation arm (106) and described 3rd radiation arm (107) are in " 7 " type.
Above-mentioned LTE multiband aerial, described antenna body portion also comprises one the 4th radiation arm (109), be connected to one end away from described second radiation arm (106) on described first radiation arm (105), described 4th radiation arm (109) and described first radiation arm (105) are formed is inverted " L " type structure, described 4th radiation arm (109) for resonance in one the 3rd resonant frequency point (f3) to cover one second high-frequency band.
Above-mentioned LTE multiband aerial, described first branch comprises one the 6th radiation arm (110), one the 7th radiation arm (111) and one the 8th radiation arm (112); The upper extraction one second earth point (104) of described 8th radiation arm (112); Be separated by between described 6th radiation arm (110) and described 4th radiation arm (109) described first gap, described antenna body portion forms one first current path by described first slot-coupled in described 6th radiation arm (110), and described first current path resonance is in described first resonant frequency point (f1).
Above-mentioned LTE multiband aerial, described 7th radiation arm (111) is connected in " one " font with described 8th radiation arm (112), described 6th radiation arm (110) is connected with described 7th radiation arm (111) and described 8th radiation arm (112) and is folding " T " font structure, described 7th radiation arm (111) resonance in one the 4th resonant frequency point (f4) to cover the frequent section of a third high.
Above-mentioned LTE multiband aerial, described second branch comprises one the 5th radiation arm (108) and one the 3rd earth point (103) from the upper extraction of described 5th radiation arm (108), be separated by between described 5th radiation arm (108) and described 3rd radiation arm (107) described second gap, described antenna body portion forms one second current path by described second aperture-coupled in described 5th radiation arm (108), and described second current path resonance is under described second resonant frequency point (f2).
Above-mentioned LTE multiband aerial, described antenna body portion comprises a parasitic branch, described first earth point (102) that described parasitic branch comprises one the 9th radiation arm (113) and is connected with described 9th radiation arm (113), described 9th radiation arm (113) and described first radiation arm (105) are separated by the 3rd gap, described antenna body portion forms one the 3rd current path by described 3rd aperture-coupled in described 9th radiation arm (113), described 3rd current path resonance in one the 5th resonant frequency point (f5) to cover described first high-frequency band.
Above-mentioned LTE multiband aerial, the frequency range of described first low frequency frequency range and described second low frequency frequency range is between 700MHz to 960MHz.
Above-mentioned LTE multiband aerial, the frequency range of described first high-frequency band is between 1710MHz to 2690MHz.
Above-mentioned LTE multiband aerial, the frequency range of described first high-frequency band is between 1710MHz to 2690MHz.
Also provide a kind of mobile terminal, specifically above-mentioned LTE multiband aerial.
Beneficial effect: above technical scheme adopts the form of two couple feed, effectively can increase the beamwidth of antenna, and antenna resonance the subject comparing is clear and definite, is easy to antenna analysis and debugging.
Accompanying drawing explanation
Fig. 1 is that antenna cabling of the present invention launches form schematic diagram;
Fig. 2 is the perspective view at a visual angle of antenna cabling of the present invention;
Fig. 3 is the perspective view at another visual angle of antenna cabling of the present invention;
Fig. 4 is the frequency response schematic diagram of antenna of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as limiting to the invention.
The communications band corresponding due to FDD-LTEBand17 and FDD-LTEBand28 technology is respectively 704MHz-746MHz and 703MHz-803MHz, belongs to low frequency frequency range, and as everyone knows, wavelength and frequency are inversely proportional to, and frequency is lower requires that the length of antenna is longer.Support that FDD-LTEBand17 and FDD-LTEBand28 adds the length of antenna for mobile phone undoubtedly, thus add the area of antenna for mobile phone.This and mobile phone terminal product are miniaturized, and the development trend that thickness is thin contradicts.Therefore, do not affecting under mobile phone overall appearance situation, needing to design and can cover multiband, especially support the terminal antenna of American-European FDD-LTE frequency range.
In prior art, a kind of implementation adopts the mode of direct feed to obtain the resonance frequency of low frequency 700MHz, because the length of antenna and resonance frequency are inversely proportional to, therefore so low resonance band is obtained, the track lengths of antenna is longer comparatively speaking, the Area comparison taken is large, and the trend of end product miniaturization is disagreed with present stage.Also have in addition and adopt duplexer scheme, gone the difference of control antenna access point and coupling by duplexer, produce different resonance, thus increase the bandwidth of antenna.But duplexer itself can bring certain loss, bring certain difficulty to design.
With reference to Fig. 1, Fig. 2, Fig. 3, the invention provides a kind of LTE multiband aerial, as shown in Figure 1, comprise,
One antenna body portion, antenna body portion is arranged distributing point 101 and the first earth point 102, by resonance to cover one first high-frequency band;
One first branch, and first gap that is separated by between antenna body portion, antenna body portion by the first aperture-coupled, and resonance in one first resonant frequency point f1 to cover one first low frequency frequency range;
One second branch, and second gap that is separated by between antenna body portion, antenna body portion by the second aperture-coupled, and resonance in one second resonant frequency point f2 to cover one second low frequency frequency range.
Adopt coupling feed way, a coupling capacitance can be formed between antenna minor matters, add capacitive, to effectively reduce antenna length, the bandwidth of antenna can be improved simultaneously.And by utilizing the first branch and the second branch to realize the mode of two couple feed to obtain the first low frequency frequency range and the second low frequency frequency range, effectively to increase the beamwidth of antenna, realize mobile phone multiband, multi-mode working.When can avoid adopting the mode of single couple feed to obtain low-frequency resonant frequency, low-frequency resonant and high-frequency resonant are produced by same minor matters simultaneously, can affect low frequency and high frequency when regulating minor matters simultaneously, and resonance main body overlaps, and bring the defect of difficulty to debugging.
Particularly, above-mentioned LTE multiband aerial, antenna body portion can comprise,
First radiation arm 105, first radiation arm 105 draws distributing point 101,
3rd radiation arm the 107, three radiation arm 107 is arranged near the second branch, and and second gap that is separated by between the second branch;
Second radiation arm 106, for connecting the first radiation arm 105 and the 3rd radiation arm 107, second radiation arm 106 and the 3rd radiation arm 107 in " 7 " type.
Particularly, distributing point 101 can form " L " type, and it is T-shape that its part be connected with the first radiation arm 105 is positioned at same plane, and remainder is perpendicular to T-shape plane and be connected to the printed circuit board (PCB of mobile phone, PrintedCircuitBoard) on
In a kind of preferred embodiment, above-mentioned LTE multiband aerial, with reference to Fig. 2, antenna body portion can also comprise the 4th radiation arm 109, be connected to the one end be connected with the second radiation arm 106 on the first radiation arm 105 and away from the first radiation arm 105,4th radiation arm 109 and the first radiation arm 105 are positioned at same plane and are formed is inverted " L " type structure, the 4th radiation arm 109 resonance in the 3rd resonant frequency point f3 to cover the second high-frequency band.
Above-mentioned LTE multiband aerial, antenna body portion also comprises parasitic branch, the first earth point 102 that parasitic branch comprises the 9th radiation arm 113 and is connected with the 9th radiation arm 113,9th radiation arm 113 and the first radiation arm 105 are separated by the 3rd gap, antenna body portion forms the 3rd current path by the 3rd aperture-coupled in the 9th radiation arm 113, the 3rd current path resonance in the 5th resonant frequency point f5 to cover the first high-frequency band.
In a kind of preferred embodiment, the first earth point 102 is near distributing point 101 and be arranged in parallel with part distributing point 101 being connected printed circuit board, the 9th radiation arm 113 then and the first radiation arm 105 be positioned at same plane and gap, interval the 3rd.
The gap width in the 3rd gap be separated by by regulating the length of the 9th radiation arm 113 and the 9th radiation arm 113 and the first radiation arm 105, can regulate the 5th resonant frequency point f5.
Above-mentioned LTE multiband aerial, the first branch can comprise the 6th radiation arm 110, the 7th radiation arm 111 and the 8th radiation arm 112; 8th radiation arm 112 draws one second earth point 104; Be separated by between 6th radiation arm 110 and the 4th radiation arm 109 first gap, and antenna body portion forms the first current path by the first slot-coupled in the 6th radiation arm 110, and the first current path resonance is in the first resonant frequency point f1.
Above-mentioned LTE multiband aerial, 7th radiation arm 111 is connected in " one " font with the 8th radiation arm 112,6th radiation arm 110 is connected with the 7th radiation arm 111 and the 8th radiation arm 112 and is folding " T " font structure, the 7th radiation arm 111 resonance in the 4th resonant frequency point f4 to cover the frequent section of third high.
Particularly, second earth point 104 can adopt two " L " type parts, " L " type part and another " L " type part are positioned at two perpendicular planes, " L " type part is connected with printed circuit board, and the plane at another " L " type part and the 8th radiation arm 112 place is simultaneously mutually vertical perpendicular to printed circuit board place plane.
Specific works process is: energy is coupled to the 6th radiation arm 110 by the first gap between the 4th radiation arm 109 and the 6th radiation arm 110 from the 4th radiation arm 109, finally by the 8th radiation arm 112, second earth point 104 is back to ground, form the first resonant frequency point f1, stiffness of coupling can be regulated by regulating the width in the first gap between the 4th radiation arm 109 and the 6th radiation arm 110, thus the position of the first resonant frequency point f1 in adjustment Fig. 4, notch depth and bandwidth, namely the 4th radiation arm 109 not only can just in time form the 3rd resonant frequency point f3 according to the length of self, can also by Energy Coupling to the 6th radiation arm 110, regulate the length of the 4th radiation arm 109 can regulate the position of the 3rd resonant frequency point f3 in Fig. 4, certainly the first resonant frequency point f1 can also be had influence on, in embody rule, need the length carefully regulating the 4th radiation arm 109, the length of the 6th radiation arm 110 and the width in the first gap, first resonant frequency point f1 and the 3rd resonant frequency point f3 is met the requirements, meanwhile, by regulating the length of the 7th radiation arm 111 to regulate the 4th resonant frequency point f4.
Above-mentioned LTE multiband aerial, one the 3rd earth point 103 that second branch comprises the 5th radiation arm 108 and draws on the 5th radiation arm 108, be separated by between 5th radiation arm 108 and the 3rd radiation arm 107 second gap, antenna body portion forms the second current path by the second aperture-coupled in the 5th radiation arm 108, and the second current path resonance is under the second resonant frequency point f2.
Specific works process is: energy by the second gap of being separated by between the 5th radiation arm 108 and the 3rd radiation arm 107 from the 3rd radiation arm 107 couple feed to the 5th radiation arm 108, finally be back to ground, form the second resonant frequency point f2 in Fig. 4, the second resonant frequency point f2 can be regulated by regulating the length of the 5th radiation arm 108 and the 3rd radiation arm 107, the intensity of the widths affect Energy Coupling between the 5th radiation arm 108 and the 3rd radiation arm 107, and then affect the degree of depth and the bandwidth of the second resonant frequency point f2, the width in the second gap is regulated to contribute to improving resonant intensity and bandwidth.
In composition graphs 4, the frequency response schematic diagram of antenna can be found out, the first resonant frequency point f1 that low-frequency range produces and the second resonant frequency point f2 effectively can cover 700MHz to 960MHz, namely the frequency range of the first low frequency frequency range and the second low frequency frequency range is between 700MHz to 960MHz, just in time cover the low frequency frequency range of 2G, 3G, 4G, to meet the requirement of FDD-LTEBand17 and FDD-LTEBand28 communications band.
3rd resonant frequency point f3, the 4th resonant frequency point f4, the return loss of the 5th resonant frequency point f5 from 1710MHz to 2690MHz, all below-5dB, just in time cover the high-frequency band of 2G, 3G, 4G.And the 5th resonant frequency point f5 can effectively cover 4G frequency range TDD-LTEBand38, Band41 and FDD-LTEBand7, the increasing demand of end product band support instantly can be met, especially support the low-frequency range of LTE.
Also provide, adopt the mobile terminal of above LTE multiband aerial, effectively can increase the beamwidth of antenna, realize the multiband of mobile terminal, multi-mode working.
These are only preferred embodiment of the present invention; not thereby embodiments of the present invention and protection range is limited; to those skilled in the art; should recognize and all should be included in the scheme that equivalent replacement done by all utilizations specification of the present invention and diagramatic content and apparent change obtain in protection scope of the present invention.
Claims (10)
1. a LTE multiband aerial, is characterized in that, comprises,
One antenna body portion, described antenna body portion is arranged distributing point (101) and the first earth point (102), by resonance to cover one first high-frequency band;
One first branch, and one first gap that is separated by between described antenna body portion, described antenna body portion by described first aperture-coupled, and resonance in one first resonant frequency point (f1) to cover one first low frequency frequency range;
One second branch, and one second gap that is separated by between described antenna body portion, described antenna body portion by described second aperture-coupled, and resonance in one second resonant frequency point (f2) to cover one second low frequency frequency range.
2. LTE multiband aerial according to claim 1, is characterized in that, described antenna body portion comprises,
One first radiation arm (105), described first radiation arm (105) is upper draws described distributing point (101);
One the 3rd radiation arm (107), described 3rd radiation arm (107) is arranged near described second branch, and and described second gap that is separated by between described second branch;
One second radiation arm (106), for connecting described first radiation arm (105) and described 3rd radiation arm (107), described second radiation arm (106) and described 3rd radiation arm (107) are in " 7 " type.
3. LTE multiband aerial according to claim 2, it is characterized in that, described antenna body portion also comprises one the 4th radiation arm (109), be connected to one end away from described second radiation arm (106) on described first radiation arm (105), described 4th radiation arm (109) and described first radiation arm (105) are formed is inverted " L " type structure, described 4th radiation arm (109) for resonance in one the 3rd resonant frequency point (f3) to cover one second high-frequency band.
4. LTE multiband aerial according to claim 3, is characterized in that, described first branch comprises one the 6th radiation arm (110), one the 7th radiation arm (111) and one the 8th radiation arm (112); The upper extraction one second earth point (104) of described 8th radiation arm (112); Be separated by between described 6th radiation arm (110) and described 4th radiation arm (109) described first gap, described antenna body portion forms one first current path by described first slot-coupled in described 6th radiation arm (110), and described first current path resonance is in described first resonant frequency point (f1).
5. LTE multiband aerial according to claim 4, it is characterized in that, described 7th radiation arm (111) is connected in " one " font with described 8th radiation arm (112), described 6th radiation arm (110) is connected with described 7th radiation arm (111) and described 8th radiation arm (112) and is folding " T " font structure, described 7th radiation arm (111) resonance in one the 4th resonant frequency point (f4) to cover the frequent section of a third high.
6. LTE multiband aerial according to claim 2, it is characterized in that, described second branch comprises one the 5th radiation arm (108) and one the 3rd earth point (103) from the upper extraction of described 5th radiation arm (108), be separated by between described 5th radiation arm (108) and described 3rd radiation arm (107) described second gap, described antenna body portion forms one second current path by described second aperture-coupled in described 5th radiation arm (108), described second current path resonance is under described second resonant frequency point (f2).
7. LTE multiband aerial according to claim 2, it is characterized in that, described antenna body portion comprises a parasitic branch, described first earth point (102) that described parasitic branch comprises one the 9th radiation arm (113) and is connected with described 9th radiation arm (113), described 9th radiation arm (113) and described first radiation arm (105) are separated by one the 3rd gap, described antenna body portion forms one the 3rd current path by described 3rd aperture-coupled in described 9th radiation arm (113), described 3rd current path resonance in one the 5th resonant frequency point (f5) to cover described first high-frequency band.
8. LTE multiband aerial according to claim 1, is characterized in that, the frequency range of described first low frequency frequency range and described second low frequency frequency range is between 700MHz to 960MHz.
9. LTE multiband aerial according to claim 1, is characterized in that, the frequency range of described first high-frequency band is between 1710MHz to 2690MHz.
10. a mobile terminal, is characterized in that, has LTE multiband aerial according to claim 1.
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| CN105846055A (en) * | 2016-03-22 | 2016-08-10 | 天津工业大学 | Multi-frequency PIFA mobile phone antenna containing parasitic element |
| CN106571528A (en) * | 2016-10-25 | 2017-04-19 | 瑞声科技（南京）有限公司 | Multi-band antenna system and electronic equipment |
| CN106876891A (en) * | 2016-12-29 | 2017-06-20 | 努比亚技术有限公司 | A kind of antenna, mobile terminal and its control method |
| CN107293843A (en) * | 2016-03-31 | 2017-10-24 | 上海莫仕连接器有限公司 | WIFI antenna assemblies |
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| CN105846055A (en) * | 2016-03-22 | 2016-08-10 | 天津工业大学 | Multi-frequency PIFA mobile phone antenna containing parasitic element |
| CN107293843A (en) * | 2016-03-31 | 2017-10-24 | 上海莫仕连接器有限公司 | WIFI antenna assemblies |
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Application publication date: 20160316 |