CN204966696U - Earth potential metal cabinet radiation antenna - Google Patents
Earth potential metal cabinet radiation antenna Download PDFInfo
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- CN204966696U CN204966696U CN201520731994.4U CN201520731994U CN204966696U CN 204966696 U CN204966696 U CN 204966696U CN 201520731994 U CN201520731994 U CN 201520731994U CN 204966696 U CN204966696 U CN 204966696U
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- 239000002184 metal Substances 0.000 title claims abstract description 108
- 230000005855 radiation Effects 0.000 title description 17
- 230000008878 coupling Effects 0.000 claims description 95
- 238000010168 coupling process Methods 0.000 claims description 95
- 238000005859 coupling reaction Methods 0.000 claims description 95
- 238000000034 method Methods 0.000 abstract description 7
- 238000005520 cutting process Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model provides an earth potential metal -back radiating antenna, include: shell, metal center, the line of rabbet joint and series resonance circuit before the metal, wherein, the line of rabbet joint by the topside of metal center, left side limit, right side limit and the shell is around forming before the metal, the one end of series resonance circuit is connected to through interconnecting link the topside of metal center, the other end is connected to the feed position through interconnecting link. The utility model discloses an earth potential metal -back radiating antenna has realized that the metal center is the cell -phone structure of continuity characteristic, has reduced accurate cutting technology and nanometer shooting technique in traditional cell -phone manufacture process, and the aesthetic property also improves, and, strengthened the bandwidth performance of antenna.
Description
Technical Field
The utility model relates to a mobile terminal antenna field, in particular to ground potential metal casing radiation antenna.
Background
With the increase of the hardware upgrading speed of the smart phone, the heat dissipation problem of the smart phone needs to be solved urgently, and the case made of metal is the easiest solution. However, the appearance of the mobile phone using metal material will inevitably interfere with the radiation of the communication signal, and reduce the communication quality. Moreover, with the continuous upgrade of the communication system, the requirement that one antenna supports multiple frequency bands is more and more emphasized by the market, which brings great difficulty to the design of the built-in antenna of the mobile phone. In the metal mobile phones emerging in the market at present, the method of discontinuous metal middle frames is mostly adopted.
As shown in fig. 1, the metal middle frame 10 adopts a gap breaking process, two gaps with a distance a are formed on the top side of the metal middle frame, the feeding potential 30 on the metal front shell 20 is connected with the top side of the metal middle frame 10 through the connecting line 31, and the metal middle frame 10, the ground potential metal plate 20, the feeding potential 30 and the connecting line 31 form an antenna structure.
The method has the advantages that: the metal middle frame 10 plays a role of an external antenna, and the performance of the mobile phone antenna can be improved; but the disadvantages are that: firstly, a precise cutting process is needed to cut off the continuous metal middle frame, then a nano injection molding process is used for the discontinuous part of the metal middle frame, and a series of processing and treating flows are used, so that the working procedures are increased, and the manufacturing cost and the time cost of the mobile phone are increased.
Therefore, the design of a continuous metal middle frame mobile phone becomes a subject of great investment in research and development of various large mobile phone manufacturers. However, if the metal middle frame is not broken, the signal radiation performance of the mobile phone antenna is greatly reduced in the environment surrounded by the metal middle frame.
Therefore, how to reasonably design the antenna structure to ensure the communication quality is an urgent problem to be solved for the mobile phone with the metal middle frame having the continuity characteristic.
SUMMERY OF THE UTILITY MODEL
The utility model provides a ground potential metal casing radiation antenna has solved among the prior art and has made the problem that the metal center breaks for guaranteeing communication quality.
The technical scheme of the utility model is realized like this:
a ground potential metal case radiating antenna comprising: the metal front shell, the metal middle frame, the slot and the series resonance circuit; wherein,
the slot is formed by surrounding the top edge, the left side edge, the right side edge and the metal front shell of the metal middle frame;
one end of the series resonance circuit is connected to the top edge of the metal middle frame through a connecting line, and the other end of the series resonance circuit is connected to a feed potential through a connecting line.
Optionally, the ground potential metal shell radiation antenna of the present invention further comprises a first coupling element, a second coupling element and a third coupling element, wherein the first coupling element, the second coupling element and the third coupling element are perpendicular or parallel to the top edge of the metal middle frame.
Optionally, the first coupling element, the second coupling element and the third coupling element are connected with the top edge of the metal middle frame; wherein,
the third coupling element is arranged at the part with the minimum current of the primary resonance of the slot, and the length of the third coupling element is used for controlling the frequency of the primary resonance of the slot so as to enable the primary resonance of the slot to generate resonance in a low frequency band;
the first coupling element is arranged at the part with the smallest current of the slot secondary resonance, and the length of the first coupling element is used for controlling the frequency of the slot secondary resonance so as to enable the slot secondary resonance to generate resonance in a high-frequency band;
the second coupling element is disposed at a portion where a resonance current of a second current loop formed around the series resonant circuit, the top side of the metal middle frame, and the right side of the metal middle frame is smallest, and a frequency of resonance thereof is controlled by a length of the second coupling element so as to resonate at a high frequency band.
Optionally, the first and second coupling elements are connected to the left and right sides of the metal middle frame, respectively, and the third coupling element is connected to the top side of the metal middle frame.
Optionally, the first coupling element and the second coupling element are located closer to one side of the metal front shell.
Optionally, one end of the slit protrudes and extends towards the metal front shell, the other end of the slit is shortened, and the slit is filled by the metal front shell.
Optionally, the first and second coupling elements are connected to the metal front shell and the third coupling element is connected to the top edge of the metal middle frame.
In the ground potential metal shell radiation antenna, the first coupling element, the second coupling element and the third coupling element are in the same plane.
In the ground potential metal shell radiation antenna, the first coupling element, the second coupling element and the third coupling element are in different planes.
Optionally, the first coupling element and the second coupling element are in the same plane, and the third coupling element is in another plane.
The utility model has the advantages that:
(1) the mobile phone structure with the continuous characteristic of the metal middle frame is realized, the precision cutting process and the nanometer injection molding process in the traditional mobile phone manufacturing process are reduced, and the attractiveness is improved;
(2) the bandwidth performance of the antenna is enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an antenna structure of a conventional mobile phone metal middle frame in an interruption manner;
fig. 2 is a schematic structural diagram of a first embodiment of a ground potential metal shell radiation antenna according to the present invention;
fig. 3 is a schematic structural diagram of a second embodiment of a ground potential metal shell radiation antenna according to the present invention;
fig. 4 is a schematic structural diagram of a third embodiment of a ground potential metal shell radiation antenna according to the present invention;
fig. 5 is a schematic structural diagram of a ground potential metal shell radiation antenna according to the fourth and fifth embodiments of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The existing metal middle frame of the mobile phone needs to adopt a precision cutting technology to realize a breaking process, and then a nanometer injection molding process needs to be used on the breaking part of the metal middle frame, so that the manufacturing cost and the time cost of the mobile phone are increased. The utility model discloses a cell-phone metal center is the continuity design, has strengthened built-in antenna's bandwidth performance moreover, has guaranteed communication quality.
The ground potential metal shell radiation antenna of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example one
As shown in fig. 2, the utility model discloses a ground potential metal casing radiation antenna includes: a metal front case 200, a metal middle frame 210, a slot 300, and a series resonant circuit 400.
Wherein the slot 300 is formed by the top edge 100 of the metal middle frame 210, the left side edge 101 of the metal middle frame 210, the right side edge 102 of the metal middle frame 210, and the metal front shell 200. The length B of slot 300 is determined by the width of the phone, and the width C of slot 300 is determined by the distance from the LCD screen of the phone to the top edge 100 of the metal bezel.
One end of the series resonant circuit 400 is connected to the top side 100 of the metal bezel 210 through a connection line, and the other end is connected to the feed potential 230 through a connection line. The series resonance circuit 400 can enable the slot 300 to form two different current loops, the first current loop is formed around the slot 300, and the series resonance circuit 400 can enhance the effective inductance component of the slot 300, so that the primary resonance of the slot 300 can generate resonance in a lower frequency band under the condition of a certain length, and the miniaturization effect of the slot is realized; as the frequency increases, the inductive reactance of the left side 101 of the metal middle frame 210 increases, and therefore, a second current loop is formed around the series resonant circuit 400, the top side 100 of the metal middle frame 210, and the right side 102 of the metal middle frame, which current loop resonates in a high frequency band. In addition, the coupling current of the series resonant circuit 400 can simultaneously excite the secondary resonance of the slot 300, so that it also resonates in a high frequency band. The primary resonance and the secondary resonance of the slot 300 and the current loop generating resonance in the high frequency band and the inherent current resonance mode of the metal shell generate electromagnetic field coupling effects to excite the whole metal shell to become an antenna radiator, thereby effectively improving the bandwidth performance of the low frequency band and the high frequency band at the same time.
Example two
The second embodiment of the present invention is the second embodiment of the present invention, and the second embodiment has the same parts as the first embodiment, and the same component numbers will be attached, and unless otherwise mentioned, the second embodiment is regarded as having the same structure and function.
As shown in fig. 3, in this embodiment, the ground-potential metal shell radiating antenna further includes a first coupling element 600, a second coupling element 601 and a third coupling element 602, which can be connected to the top side 100 of the metal middle frame 210 by screw fastening or spring-loaded contact in the mobile phone assembly. The third coupling element 602 is located close to the current minimum part of the slot 300 primary resonance, and the length of the third coupling element 602 can effectively control the frequency of the slot 300 primary resonance, so that the slot 300 primary resonance can generate resonance in a low frequency band. The first coupling element 600 is located close to the current minimum portion of the slot 300 secondary resonance, and the frequency of the slot 300 secondary resonance can be effectively controlled by the length of the first coupling element 600, so that it can resonate in a high frequency band. The second coupling element 601 is located close to the part of the second current loop formed around the series resonant circuit 400, the top side 100 of the metal middle frame and the right side 102 of the metal middle frame where the current of the resonance is the smallest, and the length of the second coupling element 601 is used to control the frequency of its resonance so that it also resonates in the high frequency band. Therefore, the bandwidth performance of the antenna radiator in the high frequency band can be conveniently enhanced by properly adjusting the lengths of the first coupling element 600 and the second coupling element 601.
The positions of the first coupling element 600, the second coupling element 601 and the third coupling element 602 are obtained by simulation of electromagnetic wave simulation software.
EXAMPLE III
The third embodiment of the present invention is the same as the first embodiment, and the same components are denoted by the same reference numerals, and unless otherwise mentioned, the third embodiment is regarded as having the same structure and function.
As shown in fig. 4, in this embodiment, the ground-potential metal shell radiating antenna further includes a first coupling element 600, a second coupling element 601, and a third coupling element 602, in the mobile phone assembly, the first coupling element 600 and the second coupling element 601 may be connected to the left side 101 and the right side 102 of the metal middle frame by screw fastening or spring-foot contact, respectively, and the third coupling element 602 may be connected to the top side 100 of the metal middle frame by screw fastening or spring-foot contact.
The first coupling element 600 and the second coupling element 601 are located closer to the metal front case 200 with smaller potential, and the magnetic field induction effect of the relatively strong slot can effectively excite the first coupling element 600 and the second coupling element 601 to generate independent resonant modes and generate resonance in a high-frequency band, so that the bandwidth performance of an antenna radiator in the high-frequency band is further enhanced, and the requirement of the mobile phone 4G communication system on the antenna is met.
Example four
The fourth embodiment of the present invention is the same as the first to third embodiments, has the same components as the first to third embodiments, and has the same structure and function unless otherwise mentioned.
In order to further realize the miniaturization of the slot 300 and the higher integration of the mobile phone, in the ground potential metal shell radiation antenna in the first to third embodiments, as shown in fig. 5, one end of the slot 300 protrudes and extends toward the metal front shell 200, the length B of the other end of the slot 300 is shortened, and the slot is filled by the metal front shell 200.
The antenna structure of the embodiment provides powerful support for diversification of mobile phone design, and can meet the requirement of high integration level of the mobile phone.
In the antenna structure shown in fig. 5, one end of the slot 300 on the left side protrudes and extends toward the metal front case 200, and the length B of one end of the slot 300 on the right side is shortened, so that a person skilled in the art can design the slot 300 on the right side protruding and extending toward the metal front case 200 according to the design requirement of a mobile phone, and the length B of one end of the slot 300 on the left side is shortened.
EXAMPLE five
The following description is of a fifth embodiment of the present invention, which has the same parts as those of the fourth embodiment, and will be given with the same component numbers, and unless otherwise noted, will be regarded as having the same structure and function.
As shown in fig. 5, in this embodiment, the first coupling element 600 and the second coupling element 601 may be connected to the metal front case 200 by spring-leg contact, and the third coupling element 602 may be connected to the top edge 100 of the metal middle frame by screw fastening or spring-leg contact. This embodiment helps the slot 300 to resonate in the lower frequency band while ensuring the bandwidth performance of the antenna radiator in the high frequency band.
In the second, third, fourth and fifth embodiments, the first coupling element 600, the second coupling element 601 and the third coupling element 602 may be on the same plane, or may be on different planes, as shown in fig. 5, the first coupling element 600, the second coupling element 601 and the third coupling element 602 are not on the same plane, wherein the first coupling element 600 and the second coupling element 601 are on the same plane, and the third coupling element 602 is on another plane, so that the space occupied by the antenna can be effectively optimized.
The ground potential metal shell radiation antenna of the utility model realizes the mobile phone structure with the metal middle frame having the continuity characteristic, reduces the precision cutting process and the nanometer injection molding process in the traditional mobile phone manufacturing process, and improves the aesthetic property; furthermore, the bandwidth performance of the antenna is enhanced.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A ground potential metal case radiating antenna, comprising: the metal front shell, the metal middle frame, the slot and the series resonance circuit; wherein,
the slot is formed by surrounding the top edge, the left side edge, the right side edge and the metal front shell of the metal middle frame;
one end of the series resonance circuit is connected to the top edge of the metal middle frame through a connecting line, and the other end of the series resonance circuit is connected to a feed potential through a connecting line.
2. The ground potential metal case radiating antenna of claim 1, further comprising a first coupling element, a second coupling element, and a third coupling element, said first coupling element, second coupling element, and third coupling element being perpendicular or parallel to a top edge of said metal bezel.
3. The ground potential metal case radiating antenna of claim 2, wherein said first, second and third coupling elements are connected to a top edge of a metal bezel; wherein,
the third coupling element is arranged at the part with the minimum current of the primary resonance of the slot, and the length of the third coupling element is used for controlling the frequency of the primary resonance of the slot so as to enable the primary resonance of the slot to generate resonance in a low frequency band;
the first coupling element is arranged at the part with the smallest current of the slot secondary resonance, and the length of the first coupling element is used for controlling the frequency of the slot secondary resonance so as to enable the slot secondary resonance to generate resonance in a high-frequency band;
the second coupling element is disposed at a portion where a resonance current of a second current loop formed around the series resonant circuit, the top side of the metal middle frame, and the right side of the metal middle frame is smallest, and a frequency of resonance thereof is controlled by a length of the second coupling element so as to resonate at a high frequency band.
4. The ground potential metal case radiating antenna of claim 2, wherein said first and second coupling elements are connected to the left and right sides of the metal center frame, respectively, and the third coupling element is connected to the top side of the metal center frame.
5. The ground potential metal case radiating antenna of claim 4, wherein said first coupling element and said second coupling element are located closer to a side of said metal front case.
6. The ground potential metal case radiating antenna of claim 2, wherein one end of said slot is convex and extends in the direction of the metal front case, the other end of the slot is shortened in length, and the slot is filled by the metal front case.
7. The ground potential metal case radiating antenna of claim 6, wherein said first and second coupling elements are connected to a metal front case and the third coupling element is connected to a top edge of a metal middle frame.
8. The ground potential metal case radiating antenna of any one of claims 2 to 7, wherein the first coupling element, the second coupling element and the third coupling element are in the same plane.
9. The ground potential metal case radiating antenna of any one of claims 2 to 7, wherein the first coupling element, the second coupling element and the third coupling element are in different planes.
10. The ground potential metal case radiating antenna of claim 9, wherein said first coupling element and second coupling element are in the same plane and the third coupling element is in another plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520731994.4U CN204966696U (en) | 2015-09-15 | 2015-09-15 | Earth potential metal cabinet radiation antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520731994.4U CN204966696U (en) | 2015-09-15 | 2015-09-15 | Earth potential metal cabinet radiation antenna |
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| CN204966696U true CN204966696U (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520731994.4U Expired - Fee Related CN204966696U (en) | 2015-09-15 | 2015-09-15 | Earth potential metal cabinet radiation antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161845A (en) * | 2015-09-15 | 2015-12-16 | 李文洁 | Ground potential metal shell radiation antenna |
| CN108270069A (en) * | 2016-12-30 | 2018-07-10 | 北京小米移动软件有限公司 | Antenna modules and electronic equipment |
-
2015
- 2015-09-15 CN CN201520731994.4U patent/CN204966696U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161845A (en) * | 2015-09-15 | 2015-12-16 | 李文洁 | Ground potential metal shell radiation antenna |
| CN105161845B (en) * | 2015-09-15 | 2019-05-24 | 深圳汉阳天线设计有限公司 | A kind of ground potential metal shell radiating antenna |
| CN108270069A (en) * | 2016-12-30 | 2018-07-10 | 北京小米移动软件有限公司 | Antenna modules and electronic equipment |
| CN108270069B (en) * | 2016-12-30 | 2020-06-02 | 北京小米移动软件有限公司 | Antenna module and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20190915 |
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| CF01 | Termination of patent right due to non-payment of annual fee |