CN105826666B - A kind of mobile terminal - Google Patents
A kind of mobile terminal Download PDFInfo
- Publication number
- CN105826666B CN105826666B CN201610070472.3A CN201610070472A CN105826666B CN 105826666 B CN105826666 B CN 105826666B CN 201610070472 A CN201610070472 A CN 201610070472A CN 105826666 B CN105826666 B CN 105826666B
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- Prior art keywords
- mobile terminal
- clearance area
- metal
- gap
- pin
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephone Set Structure (AREA)
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
本发明提供一种移动终端，涉及电子设备技术领域。为了解决现有技术中为不影响移动终端上缝隙天线的性能，而不能在具有缝隙的金属电池盖对应的印制电路板上的缝隙投影区中走线，从而使整机布局受限的问题。该移动终端包括：金属盖，以及被所述金属盖覆盖的印制电路板；其中，所述金属盖包括：第一金属盖体以及金属臂，且所述第一金属盖体与所述金属臂之间具有缝隙；所述印制电路板上具有净空区域，所述净空区域为缝隙在所述印制电路板上的投影区域；所述净空区域中穿设有引线；所述引线上串联有阻断预设频率电磁波的器件。本发明通过在印制电路板的净空区域中穿设的引线上串联阻断预设频率电磁波的器件，既保持缝隙天线性能的稳定性，又使得整机布局多样化。
The invention provides a mobile terminal and relates to the technical field of electronic equipment. In order to solve the problem in the prior art that the performance of the slot antenna on the mobile terminal cannot be routed in the slot projection area on the printed circuit board corresponding to the metal battery cover with the slot, thereby limiting the layout of the whole machine . The mobile terminal includes: a metal cover, and a printed circuit board covered by the metal cover; wherein, the metal cover includes: a first metal cover and a metal arm, and the first metal cover and the metal There is a gap between the arms; there is a clearance area on the printed circuit board, and the clearance area is the projection area of the gap on the printed circuit board; lead wires are threaded in the clearance area; the leads are connected in series There are devices that block electromagnetic waves of a preset frequency. The invention not only maintains the stability of the performance of the slot antenna, but also makes the layout of the whole machine diversified.
Description
Technical Field
The invention relates to the technical field of electronic equipment, in particular to a mobile terminal.
Background
With the increasing popularity of mobile terminals with all-metal housings in the terminal market, the difficulty of designing the antenna by the metal battery cover is increased. At present, in an existing antenna design scheme, in order to not affect the performance of a slot antenna on a mobile terminal, wires cannot be routed in a slot projection area on a Printed Circuit Board (PCB) Board corresponding to a metal battery cover with a slot, and all the wires must bypass the slot projection area from a component structure on the PCB Board, so that the layout of the whole antenna is greatly limited.
Existing antenna structures on mobile terminals typically increase bandwidth or tune frequencies by adding variable capacitance at the feed. However, the existing antenna structure always interferes with each other when the GPS antenna and the WIFI antenna are matched and tuned, so that the tuning process is very complicated.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a mobile terminal, so as to solve the problem in the prior art that the performance of a slot antenna on the mobile terminal is not affected, and the wire cannot be routed in a slot projection area on a PCB board corresponding to a metal battery cover with a slot, so that the layout of the whole mobile terminal is limited.
In order to solve the above technical problem, an embodiment of the present invention provides a mobile terminal, including:
a metal cover, and
a printed circuit board covered by the metal cover; wherein,
the metal cover includes: the metal arm is connected with the first metal cover body through a first connecting rod;
the printed circuit board is provided with a clearance area, and the clearance area is a projection area of a gap on the printed circuit board;
a lead is arranged in the clearance area in a penetrating manner;
and a device for blocking electromagnetic waves with preset frequency is connected in series on the lead.
The technical scheme of the invention has the following beneficial effects:
in the scheme of the invention, the device for blocking the electromagnetic wave with the preset frequency is connected in series on the lead wire penetrating through the clearance area of the printed circuit board of the mobile terminal, so that the stability of the performance of the antenna on the mobile terminal is kept, and the layout of the whole mobile terminal is diversified.
Drawings
Fig. 1 is a schematic structural diagram of a metal cover of a mobile terminal according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a printed circuit board of a mobile terminal according to an embodiment of the present invention;
fig. 3 is a schematic diagram of initial resonance positions of a GPS antenna, a wifi2.4GHz antenna, and a WIFI5GHz antenna when a matching circuit on a printed circuit board of a mobile terminal according to an embodiment of the present invention is not tuned;
FIG. 4 is a schematic diagram of a filter circuit on a printed circuit board of a mobile terminal according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the LC parallel part of the matching circuit on the printed circuit board of the mobile terminal according to the embodiment of the present invention blocking the GPS and performing a bandpass function on WIFI2.4GHz;
fig. 6 is a schematic diagram illustrating changes in resonant position curves of a GPS antenna, a wifi2.4GHz antenna, and a WIFI5GHz antenna when a matching circuit on a printed circuit board of a mobile terminal according to an embodiment of the present invention tunes only the wifi2.4GHz antenna;
fig. 7 is a schematic diagram of resonant positions of a GPS antenna, a wifi2.4GHz antenna, and a WIFI5GHz antenna finally tuned by a matching circuit on a printed circuit board of a mobile terminal according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a matching circuit on a printed circuit board of a mobile terminal according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention discloses a mobile terminal, as shown in fig. 1 and 2, the mobile terminal includes: a metal cover, and a printed circuit board 2 covered by the metal cover. The terminal device may be a mobile phone, a navigation device, a tablet computer, a Personal Digital Assistant (PDA), or a notebook computer.
Wherein, this metal lid includes: a first metal cover 1 and a metal arm 3; and a gap is arranged between the first metal cover body 1 and the metal arm 3;
the printed circuit board 2 is provided with a clearance area, and the clearance area is a projection area of the gap on the printed circuit board 2; a lead is arranged in the clearance area in a penetrating way; a device 24 for blocking electromagnetic waves with preset frequency is connected in series on the lead.
Specifically, the device 24 for blocking electromagnetic waves of a predetermined frequency includes: an inductor, a magnetic bead, a passive filter circuit, or a circuit comprising a plurality of capacitors and inductors.
Here, the preset frequency refers to an operating frequency of the mobile terminal antenna. For example: the operating frequency range of the GPS antenna is: 1575.42 ± 1.023 MHz; the WIFI antenna comprises two working frequencies of 2.4GHz and 5 GHz.
As shown in fig. 1, in the embodiment of the present invention, the gap is filled with a communication portion connecting the first metal cover 1 and the metal arm 3, and the communication portion divides the gap into a first gap 4 and a second gap 5.
Specifically, the material of the communicating portion may be rubber, metal of the same material as the metal cover, or the like.
It should be noted here that the length of the second slot 5 is shorter than the length of the first slot 4. In the embodiment of the present invention, the first slit 4 and the second slit 5 are not communicated with each other and are separated by a communicating portion. Of course, the first slit 4 and the second slit 5 may be communicated with each other according to actual conditions.
The metal arm 3 includes: a first metal arm 11 and a second metal arm 12.
Wherein, the first metal arm 11 is located on one side of the metal arm 3 corresponding to the first slit 4;
the second metal arm 12 is located on one side of the metal arm 3 corresponding to the second gap 5;
specifically, the length of the second metal arm 12 is shorter than the length of the first metal arm 11.
As shown in fig. 1 and fig. 2, the clearance area includes: a first clearance area 31 corresponding to the first slot 4 and a second clearance area 32 corresponding to the second slot 5.
Specifically, the first clearance area 31 and the second clearance area 32 are both strip-shaped areas.
Here, the device for blocking the electromagnetic wave with the preset frequency is connected in series to the lead wire penetrating through the clearance area, so as to block the electromagnetic wave with the antenna operating frequency when the lead wire connected with the device on the printed circuit board 2 passes through the clearance area, so that the performance of the operating antenna is not affected when the lead wire passes through the clearance area.
It should be noted that, in the embodiment of the present invention, the first metal arm 11 may be used as a full-band main antenna, and the second metal arm 12 may be used as a GPS antenna or a WIFI antenna. Here, the WIFI antenna is a multifrequency small antenna, including: WIFI2.4GHz antenna and WIFI5GHz antenna.
As shown in fig. 2, the printed circuit board 2 of the embodiment of the present invention further has an earphone socket 16 thereon, and the earphone socket 16 is partially located in the second clearance area 32.
Specifically, the earphone jack 16 is provided with an external jack for connecting an earphone 25 (shown in fig. 1).
More specifically, the one-side pin of the earphone jack 16 includes: a microphone pin 17, a right channel pin 18 and a left channel pin 19 arranged in sequence; the other side pin of the earphone socket 16 includes: the ground pin 20, the idle pin 21 and the detection pin 22 are arranged in sequence.
Further, the lead is specifically a detection lead 23 with one end connected to the detection pin 22, and the other end of the detection lead 23 passes through the second clearance area 32 to be connected to a pin on a chip on the printed circuit board 2.
Here, an inductor is connected in series to the detection lead 23. Of course, the antenna is not limited to an inductor, and other devices capable of blocking electromagnetic waves at the antenna operating frequency are also possible.
The definition of the pins on both sides of the earphone socket 16 is to avoid crosstalk noise caused by the parasitic direct current resistance of the inductor after the inductor is connected in series to the lead of the earphone socket 16. Here, an inductor may be connected in series to the detection lead 23, or may be connected in series to the microphone lead connected to the microphone pin 17. Further, in the definition of the two side pins of the earphone socket 16, the microphone pin 17 and the ground pin 20 may be exchanged, so that the microphone pin 17 and the detection pin 23 of the earphone socket 16 are on the same side, and both can be connected with an inductor in series to cross the second clearance area 32, which is more beneficial to the layout of the whole mobile terminal.
As shown in fig. 2, the open end of the second clearance region 32 is provided with the feed source 6 and the matching circuit 7, specifically, as shown in fig. 8, the matching circuit (7) comprises a filter tuning circuit (8) and a capacitor (9), and the filter tuning circuit (8) is connected in parallel with the capacitor (9).
It should be noted that the matching circuit 7 is used to implement independent tuning of the GPS antenna and the WIFI antenna.
One end of the matching circuit 7 is connected with the anode of the feed source 6, and the other end of the matching circuit 7 is connected with a first grounding point 10; the negative pole of the feed 6 is connected to the second ground point 13.
Specifically, the first grounding point 10 and the second grounding point 13 are respectively located at two sides of the second clearance area 32.
A third grounding point 14 and a fourth grounding point 15 are respectively arranged on two sides of the closed end of the second clearance area 32, and the third grounding point 14 and the fourth grounding point 15 are respectively connected with the metal cover.
Here, the first and second grounding points 10, 13 are used for connecting the printed circuit board 2. Of course, the grounding point is not limited to the above-mentioned area on the printed circuit board 2, and the grounding point may be provided in other areas on the printed circuit board 2.
The third ground point 14 and the fourth ground point 15 are used to connect the metal cover, so that the metal cover and the printed circuit board can be integrated, and the cavity formed between the metal cover and the printed circuit board is prevented from affecting the working efficiency of the antenna.
It should be noted that, as shown in fig. 3, in the whole debugging process of the mobile terminal, the resonant positions of the GPS antenna and the wifi2.4ghz antenna can be located in the first quadrant and the fourth quadrant respectively by adjusting the lengths and widths of the first slot 4 and the second slot 5 to appropriate values without matching; the WIFI5GHz antenna is located at a position close to the circle center, so that the initial resonance positions of the antennas do not interfere with each other.
When the filter tuning circuit 8 is connected in parallel in the matching circuit 7, independent tuning of the GPS antenna and the WIFI antenna can be realized. Specifically, as shown in fig. 4 and 8, the filter tuning circuit 8 includes: a filter circuit with a capacitor connected in parallel with an inductor, namely an LC parallel circuit, and an adjustable inductor connected in series with the filter circuit; here, the filter circuit is configured to block a signal in an operating frequency band of the GPS antenna from passing through, so that a signal in an operating frequency band of the WIFI antenna passes through smoothly.
It should be noted that the LC parallel circuit is used for fine tuning the GPS antenna, and the inductor connected in series with the LC parallel circuit is used for tuning the WIFI antenna.
Specifically, for the wifi2.4ghz antenna, the LC parallel circuit is equivalent to connecting a small inductor in parallel; for a WIFI5GHz antenna, the method is equivalent to connecting a large inductor in parallel; thus, the circuit can independently tune the adjustable inductor to enable the resonant position of the wifi2.4GHz antenna to be in the first quadrant and the WIFI5GHz antenna to be only finely tuned on the premise of keeping the GPS antenna to be only finely tuned or not moving, as shown in fig. 6.
Here, the adjustable inductor is used for enabling a frequency band signal of the wifi2.4GHz antenna to pass through and blocking a frequency band signal of the WIFI5GHz antenna from passing through, so that the purpose of independently tuning the working frequency band of the wifi2.4GHz antenna is achieved.
As shown in fig. 5, the LC parallel portion in the matching circuit 7 is a schematic diagram that blocks GPS and band-passes wifi2.4 ghz. In the figure, the power of the resonant frequency point of the GPS antenna reaches-39 dB at the final position after the matching circuit 7 is connected with the filter tuning circuit 8 in parallel, which shows that the circuit is an open circuit for the GPS antenna; the final position of the power of the resonant frequency point of the wifi2.4ghz antenna reaches 0dB after the matching circuit 7 is connected with the filter tuning circuit 8 in parallel, which indicates that the circuit is a short circuit for the wifi2.4ghz antenna, that is, the signal of the GPS antenna band cannot pass through the circuit, and the signal of the wifi2.4ghz antenna band can pass through the circuit smoothly. The circuit achieves the purpose of independently tuning the GPS antenna and the WIFI antenna.
Finally, a capacitor 9 is connected in series with the matching circuit 7, so that the resonant position of the WIFI5GHz antenna can be kept still, and the resonant positions of the GPS antenna and the WIFI2.4GHz antenna can be tuned to better positions. As shown in fig. 7, the final resonance positions of the GPS antenna, the wifi2.4GHz antenna, and the WIFI5GHz antenna are all located near the center of the circle.
According to the embodiment of the invention, the device for blocking the electromagnetic wave with the preset frequency is connected in series on the lead wire penetrating through the clearance area of the printed circuit board of the mobile terminal, so that the stability of the antenna performance of the mobile terminal is maintained, and the layout of the whole mobile terminal is diversified. By connecting the filter tuning circuit and the series capacitor in parallel in the matching circuit, the independent tuning of the GPS antenna and the WIFI antenna in the mobile terminal is realized, the tuning process of the antenna is simple and convenient, and the performance is optimized.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A mobile terminal, comprising:
a metal cover, and
a printed circuit board (2) covered by the metal cover; wherein,
the metal cover includes: the device comprises a first metal cover body (1) and a metal arm (3), wherein a gap is formed between the first metal cover body (1) and the metal arm (3);
the printed circuit board (2) is provided with a clearance area, and the clearance area is a projection area of the gap on the printed circuit board (2);
a lead is arranged in the clearance area in a penetrating manner;
and a device (24) for blocking electromagnetic waves with preset frequency is connected in series in the lead.
2. A mobile terminal according to claim 1, characterized in that the gap is filled with a communication part communicating the first metal cover (1) and the metal arm (3), the communication part dividing the gap into a first gap (4) and a second gap (5).
3. Mobile terminal according to claim 2, characterized in that said metal arm (3) comprises: a first metal arm (11) and a second metal arm (12), wherein,
the first metal arm (11) is positioned on one side of the metal arm (3) corresponding to the first gap (4);
the second metal arm (12) is positioned on one side of the metal arm (3) corresponding to the second gap (5);
the length of the second metal arm (12) is shorter than the length of the first metal arm (11).
4. The mobile terminal of claim 2, wherein the headroom region comprises: a first clearance area (31) corresponding to the first gap (4) and a second clearance area (32) corresponding to the second gap (5); the first clearance area (31) and the second clearance area (32) are both strip-shaped areas.
5. A mobile terminal according to claim 4, characterized in that the open end of the second clearance area (32) is provided with a feed (6) and a matching circuit (7), the matching circuit (7) comprises a filter tuning circuit (8) and a capacitor (9), and the filter tuning circuit (8) is connected in parallel with the capacitor (9).
6. The mobile terminal according to claim 5, characterized in that the filter tuning circuit (8) comprises: a filter circuit with a capacitor and an inductor connected in parallel and an adjustable inductor connected in series with the filter circuit.
7. A mobile terminal according to claim 5, characterized in that one end of the matching circuit (7) is connected to the positive pole of the feed (6) and the other end of the matching circuit (7) is connected to a first ground point (10); the negative electrode of the feed source (6) is connected with a second grounding point (13); wherein,
the first (10) and second (13) grounding points are located on either side of the second clearance area (32).
8. A mobile terminal according to claim 5, characterized in that a third grounding point (14) and a fourth grounding point (15) are arranged on either side of the closed end of the second clearance area (32), and the third grounding point (14) and the fourth grounding point (15) are connected to the metal cover, respectively.
9. The mobile terminal according to claim 1, wherein the means (24) for blocking electromagnetic waves of a predetermined frequency comprises: an inductor, a magnetic bead, a passive filter circuit, or a circuit comprising a plurality of capacitors and inductors.
10. The mobile terminal of claim 4, further characterized in that the printed circuit board (2) has an earphone socket (16) thereon, the earphone socket (16) being partially located within the second clearance area (32).
11. The mobile terminal of claim 10,
one side pin of the earphone socket (16) comprises: a microphone pin (17), a right channel pin (18) and a left channel pin (19) which are arranged in sequence;
the other side pin of the earphone socket (16) comprises: a ground pin (20), a blank pin (21) and a detection pin (22) which are arranged in sequence.
12. The mobile terminal of claim 11, wherein the lead is a detection lead (23) having one end connected to the detection pin (22), and the other end of the detection lead (23) passes through the second clearance area (32) to be connected to a pin on a chip on the printed circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610070472.3A CN105826666B (en) | 2016-02-01 | 2016-02-01 | A kind of mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610070472.3A CN105826666B (en) | 2016-02-01 | 2016-02-01 | A kind of mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105826666A CN105826666A (en) | 2016-08-03 |
| CN105826666B true CN105826666B (en) | 2017-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610070472.3A Active CN105826666B (en) | 2016-02-01 | 2016-02-01 | A kind of mobile terminal |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921901B (en) * | 2017-02-22 | 2019-07-09 | Oppo广东移动通信有限公司 | Mobile terminal and earphone socket |
| CN107732449B (en) * | 2017-11-20 | 2020-02-18 | Oppo广东移动通信有限公司 | Circuit Board Assemblies and Terminal Equipment for Improved Antenna Radiation Performance |
| CN108767500A (en) * | 2018-05-31 | 2018-11-06 | 维沃移动通信有限公司 | A kind of antenna assembly and mobile terminal |
| CN113540757A (en) * | 2020-04-17 | 2021-10-22 | 青岛海信移动通信技术股份有限公司 | Electronic device |
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| CN104183926A (en) * | 2013-05-21 | 2014-12-03 | 中兴通讯股份有限公司 | Slot antenna and intelligent terminal |
| CN204333256U (en) * | 2014-12-10 | 2015-05-13 | 深圳市信维通信股份有限公司 | LTE Carrier Aggregation Antenna for Portable Devices with Full Metal Housing |
| CN105098369A (en) * | 2015-08-31 | 2015-11-25 | 努比亚技术有限公司 | Slot antenna and terminal |
| CN105161823A (en) * | 2015-08-13 | 2015-12-16 | 苏州佳世达电通有限公司 | Communication device |
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|---|---|---|---|---|
| CN104183926A (en) * | 2013-05-21 | 2014-12-03 | 中兴通讯股份有限公司 | Slot antenna and intelligent terminal |
| CN204333256U (en) * | 2014-12-10 | 2015-05-13 | 深圳市信维通信股份有限公司 | LTE Carrier Aggregation Antenna for Portable Devices with Full Metal Housing |
| CN105161823A (en) * | 2015-08-13 | 2015-12-16 | 苏州佳世达电通有限公司 | Communication device |
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| CN105826666A (en) | 2016-08-03 |
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