CN102522625B - A kind of antenna structure of terminal of cellphone with metallic shell - Google Patents
A kind of antenna structure of terminal of cellphone with metallic shell Download PDFInfo
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- CN102522625B CN102522625B CN201110373565.0A CN201110373565A CN102522625B CN 102522625 B CN102522625 B CN 102522625B CN 201110373565 A CN201110373565 A CN 201110373565A CN 102522625 B CN102522625 B CN 102522625B
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Abstract
The invention discloses a kind of antenna structure of terminal of cellphone with metallic shell, comprise mobile phone metal-back, described mobile phone metal-back comprises further: metal bezel, be provided with and signal end; Metal back cover, comprises the first bonnet in the same plane and the second bonnet, has a slit between the first bonnet and the second bonnet.Wherein, the first bonnet comprises the feedback point and an earth point that position can change; Second bonnet comprises the feedback point and an earth point that position can change; And described first bonnet is connected with the ground on protecgulum by non-sheet connector with the earth point of the second bonnet; Described first bonnet is connected with the signal end on protecgulum by non-sheet connector with the feedback point of the second bonnet.Compared with prior art, structure of the present invention is simple, is easy to manufacture, and solves cell phone rear cover in prior art and large area can not use the technical problem of metal.
Description
Technical field
The present invention relates to antenna for mobile phone design, particularly a kind of antenna structure of terminal of cellphone with metallic shell.
Background technology
The built-in mobile phone antenna of current main flow is multi-frequency monopole antenna, IFA antenna and multi-frequency annular antenna etc., these antenna form all requires that the part of cell phone rear cover respective antenna cannot be metal, reason is the electromagnetic energy that metal back cover can shield built-in aerial and gives off, thus makes built-in aerial lose due function.But no matter from cell phone manufacturer or the angle of cellphone subscriber, the cell phone rear cover of large area employing metal is all the trend of Future Development.First reason is that the mobile phone of metal back cover seems more have texture than plastic rear cover, and outward appearance is also more beautiful; Second reason is that metal back cover is more durable than plastic rear cover more wear-resisting.Although the current region of some cell phone rear cover beyond antenna have employed metal material, more the use of large-area metal still has the very strong market demand.
Summary of the invention
In order to overcome prior art defect, the invention discloses a kind of antenna structure of terminal of cellphone with metallic shell
,it uses the metal back cover of mobile phone as antenna for mobile phone, solves cell phone rear cover in prior art and large area can not use the technical problem of metal.
Technical scheme of the present invention is as follows:
An antenna structure for terminal of cellphone with metallic shell, comprises mobile phone metal-back, and described mobile phone metal-back comprises further:
Metal bezel, be provided with and signal end;
Metal back cover, comprises the first bonnet in the same plane and the second bonnet, has a slit between the first bonnet and the second bonnet;
First bonnet comprises the feedback point and an earth point that position can change;
Second bonnet comprises the feedback point and an earth point that position can change;
Described first bonnet is connected with the ground on protecgulum by non-sheet connector with the earth point of the second bonnet;
Described first bonnet is connected with the signal end on protecgulum by non-sheet connector with the feedback point of the second bonnet.
Preferably, described non-sheet connector is following wherein a kind of: wire, metal clips, metal column.
Preferably, the feedback o'clock of described first bonnet and the second bonnet is connected with the signal end in metal bezel respectively by a corresponding impedance matching;
The feedback o'clock of described first bonnet is connected with the signal end in metal bezel by the first impedance matching;
The feedback o'clock of described second bonnet is connected with the signal end in metal bezel by the second impedance matching.
Preferably, described first impedance matching comprises the first electric capacity and the second electric capacity and the first inductance and the second inductance, the first electric capacity and the first inductance in parallel, the first inductance respectively with the second inductance and the second capacitances in series; Second inductance and the second Capacitance parallel connection;
Second electric capacity with the not common end ground connection of the second inductance;
First electric capacity with the not common end ground connection of the first inductance;
The feedback point of public termination first bonnet of the first electric capacity and the first inductance;
Second inductance with the signal end of the not common end connection metal protecgulum of the second electric capacity.
Preferably, described second impedance matching comprises the 3rd electric capacity, the 4th electric capacity and the 3rd inductance; 3rd electric capacity is connected with the 4th electric capacity and the 3rd inductance respectively; 3rd inductance and the 4th Capacitance parallel connection;
The feedback point of the second bonnet is accessed in non-one end be connected with the 4th electric capacity and the 3rd inductance of 3rd electric capacity;
The signal end of metal bezel is accessed in one end be connected with the 4th electric capacity and the 3rd inductance of 3rd electric capacity;
The equal ground connection of not common end of the 4th electric capacity and the 3rd inductance.
Preferably, described first impedance matching is connected with the signal end of metal bezel by duplexer with the second impedance matching; Duplexer is used for carrying out height frequency range to the signal of the signal end of metal bezel and switches.
Preferably, described first impedance matching is connected with the signal end of metal bezel by single-pole double-throw switch (SPDT) with the second impedance matching; Single-pole double-throw switch (SPDT) circuit is used for carrying out height frequency range to the signal of the signal end of metal bezel and switches.
Preferably, the feedback point of described first bonnet and earth point can along the edge on the first bonnet top or the shift positions, edge near slit.
Preferably, the feedback point of described second bonnet and earth point can along the edge near the second bonnet side or the shift positions, edge near slit.
Preferably, in the first bonnet lower surface distance mobile phone, the minimum range of element is 3mm, and described element must away from the feedback point of second flank.
Preferably, the minimum range of the element in the second bonnet lower surface distance mobile phone is 2mm, and described element need away from the feedback point of the second bonnet.
Preferably, the space of 5-6mm is needed below the slit between described first bonnet and the second bonnet.
Preferably, the width of described slit is 2-6mm, and wherein 4mm is optimum distance.
Compared with prior art, beneficial effect of the present invention is as follows:
The first, the present invention uses the metal back cover of mobile phone as antenna for mobile phone, solves cell phone rear cover in prior art and large area can not use the technical problem of metal.
The second, structure of the present invention is simple, is easy to manufacture.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the antenna structure of a kind of terminal of cellphone with metallic shell of the specific embodiment of the invention;
Fig. 2 is the end view of the antenna structure of a kind of terminal of cellphone with metallic shell of the specific embodiment of the invention;
Fig. 3 is the feedback point of specific embodiment of the invention metal back cover and the change in location figure mono-of earth point;
Fig. 4 is the feedback point of specific embodiment of the invention metal back cover and the change in location figure bis-of earth point;
Fig. 5 is the end view of the antenna structure of a kind of terminal of cellphone with metallic shell in specific embodiment of the invention mobile phone after placing battery;
Fig. 6 is the circuit diagram of the specific embodiment of the invention first impedance matching;
Fig. 7 is the circuit diagram of the specific embodiment of the invention second impedance matching;
Fig. 8 is that the specific embodiment of the invention first impedance matching and the second impedance matching access the circuit diagram of metal bezel by duplexer;
Fig. 9 is that the specific embodiment of the invention first impedance matching and the second impedance matching access the circuit diagram of metal bezel by single-pole double-throw switch (SPDT).
Embodiment
An antenna structure for terminal of cellphone with metallic shell, comprises mobile phone metal-back, and described mobile phone metal-back comprises further:
Metal bezel, be provided with and signal end;
Metal back cover, comprises the first bonnet in the same plane and the second bonnet, has a slit between the first bonnet and the second bonnet;
First bonnet comprises the feedback point and an earth point that position can change;
Second bonnet comprises the feedback point and an earth point that position can change;
Described first bonnet is connected with the ground on protecgulum by non-sheet connector with the earth point of the second bonnet; Described first bonnet is connected with the signal end on protecgulum by non-sheet connector with the feedback point of the second bonnet.
Below with the drawings and specific embodiments, the present invention is described further.
As Fig. 1 and Fig. 2, a kind of antenna structure of terminal of cellphone with metallic shell, comprises mobile phone metal-back.
Described mobile phone metal-back comprises further:
Metal bezel 6, be provided with and signal end;
Metal back cover, comprises the first bonnet 3 in the same plane and has a slit between the second bonnet 7, first bonnet 3 and the second bonnet 7;
First bonnet 3 comprises the first feedback point 1 and the first earth point 2 that position can change;
Second bonnet 7 comprises the second feedback point 4 and the second earth point 5 that position can change;
First bonnet 3 is connected with the ground on protecgulum by non-sheet connector with the earth point of the second bonnet 7;
First bonnet 3 is connected with the signal end on protecgulum by non-sheet connector with the feedback point of the second bonnet 7.
Wherein, described non-sheet connector is following wherein a kind of: wire, metal clips, metal column.In the present embodiment, non-sheet connector is metal column, and be only citing, the present invention does not make restriction to it.
Wherein, metal bezel 6 is the crown cap integrating pcb board, mobile phone display screen, keyboard and radome.Ground on the corresponding pcb board of ground in metal bezel 6 and signal end and signal end.And because be positioned at the top of pcb board as the first bonnet of antenna and the second bonnet, therefore pcb board can not establish headroom district.
Wherein, between above-mentioned first bonnet and the second bonnet, the width of slit is 2-6mm, and wherein 4mm is optimum distance.In the present embodiment, the width of slit gets 4mm.The width-adjustable of this slit.
In the present embodiment, mobile phone thickness 6mm.
First bonnet 3 is radiating elements of an antenna, this radiating element is positioned at above stratum, do not need stratum to have headroom, radiofrequency signal is from the first feedback point 1 transmitting and receiving, and the first earth point 2 is coupled together the ground of the first bonnet 3 and metal bezel 6 by a metal column.This radiating element can cover the bandwidth from 772MHz to 995MHz.The resonance frequency of the widths affect of the first bonnet 3 itself, the frequency of the larger Antenna Operation of width is lower.The position of the first feedback point 1 and the first earth point 2 can affect the impedance matching of antenna.
Second bonnet 7 is second radiating element, and this radiating element is positioned at above stratum, does not need stratum to have headroom, and radiofrequency signal is from the second feedback point 4 transmitting and receiving, and the second earth point 5 couples together the ground of this radiant body and metal bezel 6.This radiating element can cover the bandwidth from 1.7GHz to 2.3GHz.The position of the second feedback point 4 and the second earth point 5 can affect the impedance matching of antenna.
In the present embodiment, the first feedback point 1 and the first earth point 2 are positioned at the top of the first bonnet 3.Be only citing, when specifically implementing, as shown in the dotted line of Fig. 3 and Fig. 4, the position of the two can be moved along the edge on the first bonnet 3 top or near the edge of slit, therefore the present invention does not make restriction to the position of the two.
In the present embodiment, second feedback point 4 and the second earth point 5 are positioned at the side of the second bonnet 7, here citing is only, during concrete enforcement, as shown in the dotted line of Fig. 3 and Fig. 4, the position of the two can be moved along the edge near the second bonnet side or the edge near slit, therefore the present invention does not make restriction to the position of the two.
In the present embodiment, in the first bonnet 3 lower surface distance mobile phone, the minimum range of element is 3mm, and described element must away from the feedback point of second flank.
The minimum range of the element in the second bonnet 7 lower surface distance mobile phone is 2mm, and described element need away from the feedback point of the second bonnet.As Fig. 5, for battery in mobile phone 8, the distance of battery of mobile phone 8 to the second bonnet 7 lower surface is 2mm.
In the present embodiment, below the slit between the first bonnet 3 and the second bonnet 7, need the space of 5-6mm.
Be 50 ohm to mate antenna impedance, matching network is added in the feedback point of two radiating elements respectively.
The feedback of the first bonnet 3 and the second bonnet 7 o'clock is connected with the signal end in metal bezel respectively by a corresponding impedance matching;
First feedback point 1 is connected with the signal end in metal bezel 6 by the first impedance matching;
Second feedback point 4 is connected with the signal end in metal bezel by the second impedance matching.
As Fig. 6, it is in parallel that the first impedance matching comprises the first electric capacity 12 and the second electric capacity 15 and the first inductance 13 and the second inductance 14, first electric capacity 12 and the first inductance 13, and the first inductance 13 respectively with the second inductance 14 and the second electric capacity 15 are connected; Second inductance 14 and the parallel connection of the second electric capacity 15;
Second electric capacity 15 with the not common end ground connection of the second inductance 14;
First electric capacity 14 with the not common end ground connection of the first inductance 13;
The public termination first of the first electric capacity 14 and the first inductance 13 presents point 1;
Second inductance 14 with the signal end of the not common end connection metal protecgulum 6 of the second electric capacity 15.
As Fig. 7, the second impedance matching comprises the 3rd electric capacity 9, the 4th electric capacity 11 and the 3rd inductance 10; 3rd electric capacity 9 is connected with the 4th electric capacity 11 and the 3rd inductance 10 respectively; 3rd inductance 10 and the parallel connection of the 4th electric capacity 11;
Non-one end be connected with the 4th electric capacity 11 and the 3rd inductance 10 of 3rd electric capacity 9 is accessed second and is presented a little 4;
The signal end of metal bezel 6 is accessed in one end be connected with the 4th electric capacity 11 and the 3rd inductance 10 of 3rd electric capacity 9;
The equal ground connection of not common end of the 4th electric capacity 11 and the 3rd inductance 10.
In the present embodiment, the capacitance of the 3rd electric capacity 9 is about 13pF, the inductance value of the 3rd inductance 10 is about 4nH, the capacitance of the 4th electric capacity 11 is about 10pF, the capacitance of the first electric capacity 12 is about 0.4pF, the inductance value of the first inductance 13 is about 21nH, and the capacitance of the second electric capacity 15 is about 0.7pF, and the inductance value of the second inductance 14 is about 12nH.Match circuit is not limited to above-mentioned numerical value, and the concrete numerical value according to the concrete shape match circuit of antenna can change to some extent.
Corresponding above-mentioned match circuit, draws the port of a low-frequency range, draws the port of a high band from the second bonnet 7 from the first bonnet 3.The metal back cover of namely now making antenna has two ports, is respectively used to the access of low-frequency range and high band.As Fig. 8, these two ports can be merged by duplexer 24 becomes a port.Namely the first impedance matching is connected with the signal end of metal bezel by duplexer 24 with the second impedance matching; Duplexer is used for carrying out height frequency range to the signal of the signal end of metal bezel and switches.
Wherein, duplexer is made up of two band pass filters, and the passband of a filter is low frequency, and the passband of another one filter is high frequency.Parts 16-19 can isolate low frequency signal and simultaneously by high-frequency signal, parts 20-23 is used for isolating high-frequency signal allows low frequency signal pass through simultaneously.The inductance value of inductance 16 is about 8nH, and the capacitance of electric capacity 17 is about 9pF, and the inductance value of inductance 18 is about 4nH, the capacitance of electric capacity 19 is about 1pF, and the inductance value of inductance 20 is about 3nH, and the capacitance of electric capacity 21 is about 1pF, the inductance value of inductance 23 is about 7nH, and the capacitance of electric capacity 22 is about 6pF.
The parts two ports being merged into a port except duplexer designed in the present embodiment can also be the duplexer of other form.As Fig. 9, duplexer can also be replaced by single-pole double-throw switch (SPDT) circuit, is carried out the switching of height frequency range by switch.Namely the first impedance matching is connected with the signal end of metal bezel by single-pole double-throw switch (SPDT) 25 with the second impedance matching; Single-pole double-throw switch (SPDT) circuit is used for carrying out height frequency range to the signal of the signal end of metal bezel and switches.
In the present embodiment, the first bonnet 3 is as the radiant body of low frequency, and the second bonnet 7 is as the radiant body of high frequency, and when specifically implementing, both are also interchangeable, and namely the first bonnet 3 also can as the radiant body of high frequency, and the second bonnet 7 also can as the radiant body of low frequency.Corresponding match circuit also can do corresponding change.
In the present embodiment, the first bonnet 3 and the second bonnet 7 are planar rectangular.Here be only citing, when specifically implementing, the first bonnet 3 and the second bonnet 7 can be that other is polygon-shaped.And the first bonnet 3 and the second bonnet 7 also can be done to stratum bending slightly and extend in actual applications.The present invention does not make restriction to it.
The preferred embodiment of the present invention just sets forth the present invention for helping.Preferred embodiment does not have all details of detailed descriptionthe, does not limit the embodiment that this invention is only described yet.Obviously, according to the content of this specification, can make many modifications and variations.This specification is chosen and is specifically described these embodiments, is to explain principle of the present invention and practical application better, thus makes art technical staff can utilize the present invention well.The present invention is only subject to the restriction of claims and four corner and equivalent.
Claims (12)
1. an antenna structure for terminal of cellphone with metallic shell, is characterized in that, comprises mobile phone metal-back, and described mobile phone metal-back comprises further:
Metal bezel, be provided with and signal end;
Metal back cover, comprises the first bonnet in the same plane and the second bonnet, has a slit between the first bonnet and the second bonnet, and described first bonnet and the second bonnet are positioned at above the pcb board of described metal bezel as antenna, and described pcb board does not establish headroom district;
First bonnet comprises the feedback point and an earth point that position can change;
Second bonnet comprises the feedback point and an earth point that position can change;
Described first bonnet is connected with the ground on protecgulum by non-sheet connector with the earth point of the second bonnet;
Described first bonnet is connected with the signal end on protecgulum by non-sheet connector with the feedback point of the second bonnet;
The feedback of described first bonnet and the second bonnet o'clock is connected with the signal end in metal bezel respectively by a corresponding impedance matching;
The feedback o'clock of described first bonnet is connected with the signal end in metal bezel by the first impedance matching;
The feedback o'clock of described second bonnet is connected with the signal end in metal bezel by the second impedance matching;
Described first bonnet draws the port of a low-frequency range, and described second bonnet draws the port of a high band.
2. antenna structure according to claim 1, is characterized in that, described non-sheet connector is following wherein a kind of: wire, metal clips, metal column.
3. antenna structure according to claim 1, is characterized in that,
Described first impedance matching comprises the first electric capacity and the second electric capacity and the first inductance and the second inductance, the first electric capacity and the first inductance in parallel, the first inductance respectively with the second inductance and the second capacitances in series; Second inductance and the second Capacitance parallel connection;
Second electric capacity with the not common end ground connection of the second inductance;
First electric capacity with the not common end ground connection of the first inductance;
The feedback point of public termination first bonnet of the first electric capacity and the first inductance;
Second inductance with the signal end of the not common end connection metal protecgulum of the second electric capacity.
4. antenna structure according to claim 1, is characterized in that, described second impedance matching comprises the 3rd electric capacity, the 4th electric capacity and the 3rd inductance; 3rd electric capacity is connected with the 4th electric capacity and the 3rd inductance respectively; 3rd inductance and the 4th Capacitance parallel connection;
The feedback point of the second bonnet is accessed in non-one end be connected with the 4th electric capacity and the 3rd inductance of 3rd electric capacity;
The signal end of metal bezel is accessed in one end be connected with the 4th electric capacity and the 3rd inductance of 3rd electric capacity;
The equal ground connection of not common end of the 4th electric capacity and the 3rd inductance.
5. antenna structure according to claim 1, is characterized in that, described first impedance matching is connected with the signal end of metal bezel by duplexer with the second impedance matching; Duplexer is used for carrying out height frequency range to the signal of the signal end of metal bezel and switches.
6. antenna structure according to claim 1, is characterized in that, described first impedance matching is connected with the signal end of metal bezel by single-pole double-throw switch (SPDT) with the second impedance matching; Single-pole double-throw switch (SPDT) circuit is used for carrying out height frequency range to the signal of the signal end of metal bezel and switches.
7. antenna structure according to claim 1, is characterized in that, the feedback point of described first bonnet and earth point can along the edge on the first bonnet top or the shift positions, edge near slit.
8. the antenna structure according to claim 1 or 7, is characterized in that, the feedback point of described second bonnet and earth point can along the edge near the second bonnet side or the shift positions, edge near slit.
9. antenna structure according to claim 1, is characterized in that, in the first bonnet lower surface distance mobile phone, the minimum range of element is 3mm, and described element must away from the feedback point of second flank.
10. antenna structure according to claim 1, is characterized in that, the minimum range of the element in the second bonnet lower surface distance mobile phone is 2mm, and described element need away from the feedback point of the second bonnet.
11. antenna structures according to claim 1, is characterized in that, need the space of 5-6mm below the slit between described first bonnet and the second bonnet.
12. antenna structures according to claim 1, is characterized in that, the width of described slit is 2-6mm, and wherein 4mm is optimum distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110373565.0A CN102522625B (en) | 2011-11-22 | 2011-11-22 | A kind of antenna structure of terminal of cellphone with metallic shell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110373565.0A CN102522625B (en) | 2011-11-22 | 2011-11-22 | A kind of antenna structure of terminal of cellphone with metallic shell |
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| Publication Number | Publication Date |
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| CN102522625A CN102522625A (en) | 2012-06-27 |
| CN102522625B true CN102522625B (en) | 2016-04-20 |
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| CN201110373565.0A Expired - Fee Related CN102522625B (en) | 2011-11-22 | 2011-11-22 | A kind of antenna structure of terminal of cellphone with metallic shell |
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