CN105048070A - Metal ring antenna structure with meander lines - Google Patents
Metal ring antenna structure with meander lines Download PDFInfo
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- CN105048070A CN105048070A CN201510430918.4A CN201510430918A CN105048070A CN 105048070 A CN105048070 A CN 105048070A CN 201510430918 A CN201510430918 A CN 201510430918A CN 105048070 A CN105048070 A CN 105048070A
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- meander line
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- metal ring
- antenna structure
- pcb board
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Abstract
The invention discloses a metal ring antenna structure with meander lines. The metal ring antenna structure comprises a seamless metal ring, wherein an antenna earth point is arranged at the inner side of the first side of the metal ring; an antenna feeding point is arranged at the inner side of the second side of the metal ring; the first side of the metal ring comprises a first meander line; the second side comprises a second meander line; the first meander line and the second meander line comprise a plurality of openings; the adjacent openings are opposite in orientation; the antenna earth point is located above the first meander line; and the antenna feeding point is located below the second meander line of the second side. The meander line structures are formed in the sides of the seamless metal ring, so that the high-performance antennal structure capable of covering the whole honeycomb frequency band can be obtained.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of wireloop antenna structure with meander line.
Background technology
The basic demand of antenna for mobile phone to cover whole cellular band (698-960MHz low-frequency range and 1710-2690MHz high frequency band), also should meet the demand of modern cell phones inner space miniaturization simultaneously.For meeting the demand, seamless metal ring antenna for mobile phone has been suggested and has used, as namely Chinese utility model patent CN203617416U discloses a kind of seamless metal ring antenna for mobile phone, comprise housing, the periphery of described housing arranges the peripheral housing member of conduction, and the inside of described housing arranges other circuit modules.But, in order to avoid PCB is to the interference of wireloop antenna, between usual PCB and antenna, need the gap of more than 2mm, thus the size of mobile phone display screen can be reduced, and the demand of this and current smart mobile phone screen enlarging is contradiction.Therefore, be necessary that making some to wireloop antenna structure improves, to meet the designing requirement of current smart mobile phone.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of wireloop antenna structure that can cover whole cellular band.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of wireloop antenna structure with meander line, comprise a seamless metal ring, antenna ground point is provided with inside the first side of described becket, be provided with antenna feed point inside the second side of described becket, the first side of described becket comprises the first meander line, and second side comprises the second meander line, described first meander line and the second meander line comprise multiple opening, adjacent apertures towards the opposite; Described antenna ground point is positioned at the top of the first meander line, and described antenna feed point is positioned at the below of the second side meander line.
Beneficial effect of the present invention is: form meandering line structure by the side at seamless metal ring, can obtain the high performance antenna structure covering whole cellular band.
Accompanying drawing explanation
Fig. 1 is the antenna structure view of the embodiment of the present invention one;
Fig. 2 is the matching network circuit figure of the embodiment of the present invention two;
Fig. 3 is the comparison schematic diagram of the antenna reflection coefficient of the embodiment of the present invention one and embodiment two;
Fig. 4 is the comparison schematic diagram of the antenna global radiation efficiency of the embodiment of the present invention one and embodiment two;
Label declaration:
0, the origin of coordinates; 1, seamless metal ring; 2, antenna ground point; 3, antenna feed point; 4, ground plate; 5, annulus; 6, upper headroom district; 7, lower headroom district; 8, the first meander line; 9, the second meander line; 10, matching network; 11, antenna port.
Embodiment
By describing technology contents of the present invention in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with execution mode.
The design of most critical of the present invention is: arrange multiple opening at the side of seamless metal ring, and the direction of adjacent apertures is contrary, forms meander line part.
Please refer to Fig. 1, a kind of wireloop antenna structure with meander line, comprise a seamless metal ring, antenna ground point is provided with inside the first side of described becket, be provided with antenna feed point inside the second side of described becket, the first side of described becket comprises the first meander line, and second side comprises the second meander line, described first meander line and the second meander line comprise multiple opening, adjacent apertures towards the opposite; Described antenna ground point is positioned at the top of the first meander line, and described antenna feed point is positioned at the below of the second side meander line.
From foregoing description, beneficial effect of the present invention is: form meandering line structure by the side at seamless metal ring, can obtain the high performance antenna structure covering whole cellular band.
Further, described becket inside comprises a pcb board, and the gap between described becket and pcb board is 1mm, and described gap-fill has PC-ABS material.
Further, described pcb board to comprise on a ground plate, headroom district and once headroom district.
Further, the width of described pcb board is 70mm, and length is 135mm.
Further, the distance between described antenna ground point and pcb board base is 59mm, and the distance between described antenna feed point and pcb board base is 17mm.
Further, described antenna feed point connects an antenna matching network.
Seen from the above description, increase match circuit and can further improve antenna low-frequency range performance.
Further, the spacing of adjacent apertures is 2.5mm.
Embodiment one
Please refer to Fig. 1, wherein left side is front view, centre is left view, right side is right view, embodiments of the invention one are: a kind of wireloop antenna structure with meander line, be applicable to mobile phone, palmtop PC, the mobile devices such as iPAD, comprise the seamless metal ring 1 as antenna, pcb board is provided with inside becket 1, annulus 5 is formed between becket and pcb board, the width in described gap is 1mm, farthest can expand the size of display screen like this, meet the demand of consumer to large scale screen, PC-ABS material is filled with using as antenna box in described gap, described pcb board comprises ground plate 4, upper headroom district 6 and lower headroom district 7, the interior annular gap, first side of described becket is provided with antenna ground point 2, and the interior annular gap, second side of described becket is provided with antenna feed point 3, and described becket is divided into two parts by described antenna ground point 2 and antenna feed point 3, becket below described antenna ground point comprises the first meander line 8, becket above antenna feed point comprises the second meander line 9, described first meander line and the second meander line comprise multiple opening, described opening can reduce the interference of pcb board to becket, described opening is made by cutting metal ring, adjacent apertures towards the opposite, as a rule opening is more, disturb less, the performance of antenna is better, but the impact of opening many one side is attractive in appearance, also the structural strength of becket is affected on the other hand, therefore preferred, first meander line comprises 3 openings, second meander line comprises 2 openings.
The present invention arranges meander line part in becket both sides, the high capacitive reactance (capacitivereactance) in the frequency of matching difference when induction reactance (inductivereactance) does not have meander line to compensate can be introduced while reducing interference, thus also making antenna can mate whole cellular band, the position changing meander line part can change the matching performance of antenna.Experiment shows, selects suitable position can meet the coupling requirement of high and low frequency section simultaneously.Illustrate with a concrete experiment case study below, using the lower left corner of pcb board as the origin of coordinates 0, Width is X-direction, and length direction is Y-direction, and thickness direction is Z-direction.Described pcb board width b is 70mm, length l is 135mm, and thickness h is then 5mm.Antenna ground point 2 is positioned at Y-direction 59mm place, and antenna feed point is positioned at Y-direction 17mm place, and upper headroom district and lower headroom district length are in the Y direction respectively 12mm and 10mm.Described multiple opening is respectively 2.5mm and 3.5mm with the size of Z-direction in the Y direction, and the spacing of adjacent apertures is 2.5mm.After being provided with meander line part, the low-frequency range frequency of antenna 6dB return loss migrates to 727MHz from 821MHz, and at the high band of 2220MHz-2540MHz, and when not having a meander line, antenna cannot mate, and then can mate well after being provided with meander line part.
Embodiment two
Please refer to Fig. 2, embodiments of the invention two add a matching network 10 on the basis of embodiment one, described matching network is arranged between antenna feed point 3 and pcb board, comprise the first electric capacity C1, the second electric capacity C2, the first inductance L 1 and the second inductance L 2, described first electric capacity C1 and the second electric capacity C2 is connected in series, and one end connects antenna feed point 3, wherein antenna feed point 3 is preferably 50 ohm of ports, the antenna port 11 of other end connecting PCB board; First inductance L 1 one end connects the common end of the first electric capacity C1 and the second electric capacity C2, other end ground connection; The antenna port 11 of one end connecting PCB board of the second inductance L 2, other end ground connection.
Be illustrated in figure 3 the comparison schematic diagram of the antenna reflection coefficient of the embodiment of the present invention one (without matching network) and embodiment two (having matching network), greatest irradiation is reached in order to make antenna, reflection coefficient is the smaller the better, and return loss is then just in time contrary with reflection coefficient.Therefore, when not forming standing wave, return loss should be large as far as possible with the greatest irradiation realizing antenna, and this can be defined by voltage standing wave ratio VSWR or compare.Usually, the voltage standing wave ratio (reflection coefficient-6dB or return loss 6dB) of 3:1 is acceptable matching performance.As can be seen from Figure 3, when not having matching network, although antenna can cover whole high band 1710-2690MHz, in low-frequency range, then some cannot mate, i.e. 697-787MHz section; After adding matching network, then can mate whole cellular band.
Be illustrated in figure 4 the comparison schematic diagram of the antenna global radiation efficiency of the embodiment of the present invention one (without matching network) and embodiment two (having matching network), usual antenna global radiation efficiency should reach low-frequency range-4dB at clear space, high band-3dB, as seen from Figure 4, except high frequency is a bit of, there is matching network and all can reach good radiation efficiency without matching network.
In sum, the wireloop antenna structure with meander line provided by the invention, have structure simple, cover the features such as whole cellular band, by regulating the position of meander line, the matching performance of antenna can be regulated; By increasing matching network circuit, the matching performance in low-frequency range can be strengthened further.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing specification of the present invention and accompanying drawing content to do, or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. the wireloop antenna structure with meander line, comprise a seamless metal ring, antenna ground point is provided with inside the first side of described becket, antenna feed point is provided with inside the second side of described becket, it is characterized in that: the first side of described becket comprises the first meander line, second side comprises the second meander line, and described first meander line and the second meander line comprise multiple opening, adjacent apertures towards the opposite; Described antenna ground point is positioned at the top of the first meander line, and described antenna feed point is positioned at the below of the second side meander line.
2. the wireloop antenna structure with meander line according to claim 1, it is characterized in that: described becket inside comprises a pcb board, the gap between described becket and pcb board is 1mm, and described gap-fill has PC-ABS material.
3. the wireloop antenna structure with meander line according to claim 2, is characterized in that: described pcb board to comprise on a ground plate, headroom district and once headroom district.
4. the wireloop antenna structure with meander line according to Claims 2 or 3, is characterized in that: the width of described pcb board is 70mm, and length is 135mm.
5. the wireloop antenna structure with meander line according to claim 4, is characterized in that: the distance between described antenna ground point and pcb board base is 59mm, and the distance between described antenna feed point and pcb board base is 17mm.
6. the wireloop antenna structure with meander line according to claim 1, is characterized in that: described antenna feed point connects an antenna matching network.
7. the wireloop antenna structure with meander line according to claim 1, is characterized in that: the spacing of adjacent apertures is 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430918.4A CN105048070B (en) | 2015-07-21 | 2015-07-21 | Wireloop antenna structure with meander line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430918.4A CN105048070B (en) | 2015-07-21 | 2015-07-21 | Wireloop antenna structure with meander line |
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| CN105048070A true CN105048070A (en) | 2015-11-11 |
| CN105048070B CN105048070B (en) | 2018-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510430918.4A Active CN105048070B (en) | 2015-07-21 | 2015-07-21 | Wireloop antenna structure with meander line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591200A (en) * | 2016-01-06 | 2016-05-18 | 上海斐讯数据通信技术有限公司 | Antenna based on pure metal frame and mobile terminal |
| CN108461907A (en) * | 2018-03-23 | 2018-08-28 | 北京小米移动软件有限公司 | Terminal device |
| CN112713384A (en) * | 2020-12-09 | 2021-04-27 | 宇龙计算机通信科技(深圳)有限公司 | Antenna structure and mobile terminal |
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2015
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| CN101667681A (en) * | 2008-09-05 | 2010-03-10 | 大学共同利用机关法人自然科学研究机构 | Antenna array |
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| CN105591200A (en) * | 2016-01-06 | 2016-05-18 | 上海斐讯数据通信技术有限公司 | Antenna based on pure metal frame and mobile terminal |
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| Publication number | Publication date |
|---|---|
| CN105048070B (en) | 2018-11-23 |
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