CN107659681B - Drive circuit and drive method for metal back shell mobile phone - Google Patents
Drive circuit and drive method for metal back shell mobile phone Download PDFInfo
- Publication number
- CN107659681B CN107659681B CN201710891955.4A CN201710891955A CN107659681B CN 107659681 B CN107659681 B CN 107659681B CN 201710891955 A CN201710891955 A CN 201710891955A CN 107659681 B CN107659681 B CN 107659681B
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- metal part
- mobile phone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
Abstract
The embodiment of the application discloses a driving circuit and a driving method for a metal back shell mobile phone. One embodiment of the driving circuit includes: a first metal part, a second metal part, and a capacitor; the first metal part is connected with the reference ground of the driving circuit; the second metal part is electrically connected with a control processor of the mobile phone and is used for controlling the sending and receiving of mobile phone signals; the metal rear shell of the mobile phone comprises a first metal part and a second metal part, wherein the first metal part and the second metal part are insulated from each other; a first end of the capacitor is electrically connected to the first metal part and a second end of the capacitor is electrically connected to the second metal part. In the embodiment, the second metal part can be used as an antenna to receive and send mobile phone signals, and other functions can be realized by detecting capacitance change between the first metal part and the second metal part.
Description
Technical Field
The application relates to the technical field of communication, in particular to a driving circuit and a driving method for a metal back shell mobile phone.
Background
At present, for a metal back shell mobile phone, most of components of the back shell are divided into metal to be used as an antenna, so that signal transmission between the mobile phone and a base station is realized. Specifically, as shown in fig. 1a, the metal part 11 is an upper end of the rear case of the mobile phone, and is mainly used for integral support of the mobile phone. The metal part 12 is a lower end of the rear case of the mobile phone and is used as an antenna. Meanwhile, a plastic strip 13 is disposed between the metal parts 11 and 12 to perform a connecting function.
In this case, in order to realize the antenna function of the metal member 12, a metal connection bridge 14 is often provided inside the plastic strip 13. One end of the metal connection bridge 14 is connected to the metal member 11, and the other end of the metal connection bridge 14 is connected to the metal member 12. In order to better protect the metal connecting bridge 14 and make the mobile phone back case more beautiful, as shown in fig. 1b, the surface of the plastic strip 13 facing the outside of the mobile phone is a flat surface and forms the outer surface of the mobile phone back case together with the metal parts 11, 12.
However, in the mobile phone rear case with such a structure, since the metal connecting bridge 14 connects the metal part 11 and the metal part 12, the capacitance change between the metal part 11 and the metal part 12 cannot be obtained, and thus, other more functions cannot be realized by using the same.
Disclosure of Invention
In view of the above-mentioned drawbacks in the prior art, embodiments of the present application provide an improved driving circuit and driving method for a metal back shell mobile phone, so as to solve the technical problems mentioned in the above background.
In a first aspect, an embodiment of the present application provides a driving circuit for a metal back shell mobile phone, where the driving circuit includes: a first metal part, a second metal part, and a capacitor; the first metal part is connected with the reference ground of the driving circuit; the second metal part is electrically connected with a control processor of the mobile phone and is used for controlling the sending and receiving of mobile phone signals; the metal rear shell of the mobile phone comprises a first metal part and a second metal part, wherein the first metal part and the second metal part are insulated from each other; a first end of the capacitor is electrically connected to the first metal part and a second end of the capacitor is electrically connected to the second metal part.
In some embodiments, the connection position of the second end of the capacitor and the second metal part, and the distance from the second end of the capacitor to the two ends of the second metal part are positively correlated with the wavelength of the mobile phone signal.
In some embodiments, the drive circuit further comprises a sensor for detecting a capacitance value between the first and second metal parts.
In some embodiments, a first end of the sensor is electrically connected to the second metal part and a second end of the sensor is electrically connected to the control processor.
In some embodiments, the sensor sends a first signal to the control processor when the capacitance value between the first and second metal parts exceeds a preset range value; the control processor adjusts the transmitting power of the mobile phone under the control of the first signal.
In a second aspect, an embodiment of the present application provides a driving method for a metal back shell mobile phone, where the mobile phone is provided with a control processor and a driving circuit, and the driving circuit includes: a first metal part, a second metal part and a capacitor electrically connected with the first metal part and the second metal part, wherein the metal back case of the mobile phone comprises the first metal part and the second metal part, the first metal part is connected with a reference ground of the driving circuit, and the driving method comprises the following steps: the control processor transmits the mobile phone signal to the second metal part and/or receives the mobile phone signal transmitted to the control processor by the second metal part; the capacitor is conducted under the action of the mobile phone signal; the second metal part sends a mobile phone signal and/or receives the mobile phone signal for transmission to the control processor.
In some embodiments, the drive circuit further comprises a sensor electrically connected to the second metal part, and the method further comprises: the control processor receives a first signal sent by the sensor; and adjusting the transmitting power of the mobile phone under the control of the first signal.
In some embodiments, adjusting the transmit power of the handset under control of the first signal comprises: acquiring the signal intensity of a base station, and determining the range of the transmitting power of a mobile phone; based on the determined range, the transmit power of the handset is adjusted under control of the first signal.
In some embodiments, the sensor transmits a first signal when a capacitance value between the first and second metal parts exceeds a preset range of values.
In a third aspect, embodiments of the present application provide an electronic device with a metal rear shell, where the electronic device includes the driving circuit as described in any one of the embodiments of the first aspect.
According to the drive circuit and the drive method for the metal rear shell mobile phone, the capacitor is arranged, and the first metal part and the second metal part of the metal rear shell of the mobile phone can be electrically connected. Meanwhile, the first metal part is connected with the reference ground of the driving circuit, and the second metal part is electrically connected with the control processor of the mobile phone. Therefore, after the capacitor is conducted, the first metal part and the second metal part can be conducted, and the mobile phone can receive and send mobile phone signals through the second metal part. I.e. to implement the antenna function of the second metal part. In addition, the drive circuit with such a structure can also acquire a capacitance change between the first metal part and the second metal part, so that more functions can be realized by using the drive circuit. Thereby enriching the functions of the mobile phone and improving the user experience.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1a is a schematic view of a surface structure of a conventional metal back cover facing the inside of a mobile phone;
FIG. 1b is a schematic view of a surface structure of a conventional metal back cover facing the outside of a mobile phone;
FIG. 2 is a schematic diagram of an embodiment of a driving circuit provided in the present application;
FIG. 3a is a schematic structural view of one embodiment of a metal backshell;
FIG. 3b is a schematic structural view of yet another embodiment of a metal backshell;
FIG. 4 is a schematic diagram of a structure of a further embodiment of a driving circuit provided in the present application;
FIG. 5 is a flow chart of one embodiment of a driving method provided herein;
fig. 6 is a schematic structural diagram of an embodiment of an electronic device provided in the present application.
Detailed Description
The principles and features of the present application are described in further detail below with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 2 is a schematic structural diagram of an embodiment of a driving circuit for a metal back shell mobile phone provided in the present application. As shown in fig. 2, the driving circuit may include a first metal part 21, a second metal part 22, and a capacitor 24.
In the present embodiment, the first metal part 21 may be connected to a reference ground of the driving circuit. The reference ground here generally refers to the zero potential point of the driving circuit as the base point of other electronic components on the mobile phone. The second metal part 22 may be electrically connected to a control processor 23 of the handset. The control processor 23 may be a CPU (central processing Unit) of the mobile phone. Wherein, the metal back shell of the mobile phone can comprise a first metal part 21 and a second metal part 22, and the first metal part 21 and the second metal part are insulated from each other. That is, the first metal part 21 and the second metal part 22 may be formed as a part of a metal back case.
In the present embodiment, a first end of the capacitor 24 may be electrically connected to the first metal part 21, and a second end of the capacitor 24 may be electrically connected to the second metal part 22. Thus, when the capacitor 24 is turned on (e.g., radio frequency signals are provided thereto), the first metal part 21 and the second metal part 22 can be turned on, so that a loop is formed between the first metal part 21, the second metal part 22 and the mobile phone, and the second metal part 22 can receive and transmit mobile phone signals. That is, when the capacitor 24 is turned on, the second metal part 22 can implement the antenna function of the mobile phone, thereby implementing the wireless communication of the mobile phone.
In addition, since the first metal part 21 and the second metal part 22 are electrically connected by the capacitor 24, and the first metal part 21 is a reference ground of the mobile phone, the capacitor 24 can maintain a capacitance value between the first metal part 21 and the second metal part 22 within a certain range interval and is not zero. In this way, the capacitance value between the two can be detected to realize other functions. For example, when a person holds or touches a metal back cover of a mobile phone, the capacitance between the first metal part 21 and the second metal part 22 will change due to the conductive property of the person. That is, the capacitance between the two is beyond the above range. When the capacitance value changes, the user is indicated to pick up the mobile phone, and the screen of the mobile phone can be driven to brighten.
It is understood that the type and position of the capacitor 24 can be set according to the requirement, and is not limited in this application. Further, the size, shape, relative position, and the like of the first metal member 21 and the second metal member 22 are also not limited in the present application.
As shown in fig. 2, the first metal member 21 may be an upper end of a metal back case, and the second metal member 22 may be a lower end of the metal back case. Also, in order to improve the supporting strength of the first metal member 21, the size of the first metal member 21 may be larger than that of the second metal member 22. And increasing the size of the first metal member 21 is advantageous to increase the contact area between the first metal member 21 and the human body. So that the change in capacitance value between the first metal member 21 and the second metal member 22 can be increased for easy detection.
As an example, as shown in fig. 3a, the first metal part 21 may be a lower end of a metal back case, and the second metal part 22 may be located at an upper end of the metal back case. Alternatively, as shown in fig. 3b, the first metal member 21 may be a middle portion of a metal back case, and the second metal member 22 may be upper and lower ends of the metal back case. Further, in order to achieve a secure stabilization of the metal back shell, a connection 25 may be provided between the first metal part 21 and the second metal part 22. The connecting member 25 may be, but is not limited to, a plastic strip for realizing a fixed connection between the first metal part 21 and the second metal part 22, and plays an insulating role. Meanwhile, the metal rear shell is simpler in structure, the production process is simplified, and the production cost is reduced.
It should be noted that the operating frequency of the antenna can be generally divided into a low frequency, a medium frequency and a high frequency, wherein the operating frequency refers to all frequencies within the bandwidth range of the antenna, the bandwidth of the antenna generally refers to the frequency band range satisfying all indexes of the antenna, and the operating frequency of the antenna is often related to the size of the antenna, i.e. the higher the operating frequency of the antenna is, the shorter the wavelength of the corresponding signal is, the shorter the length of the antenna is, therefore, the connection position (point a shown in fig. 2) between the second end of the capacitor 24 and the second metal part 22, and the distance (L1 and L2 shown in fig. 2) between the second end of the second metal part 22 are positively related to the wavelength of the mobile phone signal.
The drive circuit that this application embodiment provided through setting up the condenser, can be connected the first metal part and the second metal part electricity of the metal backshell of cell-phone. Meanwhile, the first metal part is connected with the reference ground of the driving circuit, and the second metal part is electrically connected with the control processor of the mobile phone. Therefore, after the capacitor is conducted, the first metal part and the second metal part can be conducted, and the mobile phone can receive and send mobile phone signals through the second metal part. I.e. to implement the antenna function of the second metal part. In addition, the drive circuit with such a structure can also acquire a capacitance change between the first metal part and the second metal part, so that more functions can be realized by using the drive circuit. Thereby enriching the functions of the mobile phone and improving the user experience.
With continued reference to fig. 4, a schematic structural diagram of another embodiment of the driving circuit for a metal back shell mobile phone provided in the present application is shown. The same as the drive circuit shown in fig. 2, the drive circuit in the present embodiment may also include the first metal part 21, the second metal part 22, and the capacitor 24. The structural relationship between the three can be referred to the related description in the embodiment of fig. 2, and the description thereof is omitted here.
Unlike the driving circuit shown in fig. 2, the driving circuit in the present embodiment may further include a sensor 26 for detecting a capacitance value between the first metal part 21 and the second metal part 22. The sensor here may be a grip sensor.
As shown in fig. 4, a first end of the sensor 26 may be electrically connected to the second metal part 22, and a second end of the sensor 26 may be electrically connected to the control processor 23 of the cellular phone. Thus, when the sensor 26 detects that the capacitance value between the first metal part 21 and the second metal part 22 exceeds a preset range value, the sensor 26 may send a first signal to the control processor 23 of the mobile phone. At this time, the control processor 23 may adjust the transmission power of the handset under the control of the first signal. The preset range value can be set according to actual conditions.
For example, after a human body contacts the first metal part 21 of the metal back case of the mobile phone, the capacitance between the first metal part 21 and the second metal part 22 may exceed a predetermined range. When the sensor 26 detects that the capacitance value is outside the preset range value, a first signal may be sent to the control processor 23. In this way, the control processor 23 can reduce the transmitting power of the handset after receiving the first signal, thereby reducing the SAR (Specific Absorption Ratio) value to reduce the influence on the human health. SAR herein generally refers to the electromagnetic radiation energy absorbed by a unit mass of a substance per unit time. The SAR value is commonly used internationally to measure the thermal effect of terminal radiation.
It should be noted that, while the control processor adjusts the transmission power of the handset, it should ensure that the handset can communicate with the base station and other electronic devices normally. That is, on the premise of ensuring normal communication of the mobile phone, when the capacitance value is detected to exceed the preset range value (i.e. human body detection), the control processor can appropriately reduce the transmission power of the mobile phone.
The embodiment of the application also provides a driving method for the metal back shell mobile phone. The mobile phone can be provided with a control processor and a driving circuit. The driving circuit may include: the capacitor includes a first metal member, a second metal member, and a capacitor electrically connected to the first metal member and the second metal member. The metal back shell of the mobile phone can comprise a first metal part and a second metal part. And the first metal part is connected to a reference ground of the driving circuit. Reference may be made in particular to fig. 5, which shows a flow chart of an embodiment of the driving method provided by the present application. The driving method may include the steps of:
In this embodiment, the control processor of the mobile phone or the control processor controlling other electronic components (such as an integrated driving circuit IC) may transmit the mobile phone signal to the second metal part. And/or the control processor may receive the mobile phone signal transmitted by the second metal part, that is, the mobile phone signal transmitted by the base station or other electronic equipment to the mobile phone through the second metal part. The handset signal is a signal transmitted between the handset and a base station or other electronic devices.
In the embodiment, the first metal part is connected with the reference ground of the driving circuit, and the mobile phone signal received by the second metal part is a high-frequency signal. Thus, the capacitor electrically connected to both can be turned on.
In step 503, the second metal part sends a mobile phone signal and/or receives a mobile phone signal for transmission to the control processor.
In this embodiment, when the capacitor is in a conductive state, the second metal member and the first metal member can be electrically connected to each other. So that the second metal part can be used as an antenna. At this time, the second metal part may transmit the handset signal, which is transmitted to the control processor or the control processor controls other electronic components, to the base station or other electronic devices. And the second metal part can also receive a mobile phone signal sent by a base station or other electronic equipment and transmit the mobile phone signal to a control processor or other electronic elements of the mobile phone for communication.
In this embodiment, the control processor or other electronic component may also detect a capacitance value between the first metal part and the second metal part. And further realizes the control of other functions through the change of the capacitance value. If the capacitance value exceeds the stable range, the control processor can control the mobile phone to light the screen of the mobile phone, which indicates that the mobile phone may be in contact with a human body currently.
In some optional implementations of this embodiment, the drive circuit may further include a sensor electrically connected to the second metal part. The sensor may be electrically connected to the second metal part for detecting a capacitance value between the first metal part and the second metal part. At this time, the method may further include: the control processor receives a first signal sent by the sensor; and adjusting the transmitting power of the mobile phone under the control of the first signal.
As an example, the first signal here may be a capacitance value between the first metal part and the second metal part. The control processor can judge whether the first signal is within a preset range value (namely a stable range when the first signal is not in contact with a human body) after receiving the first signal. And when the first signal is determined to exceed the preset range value, the mobile phone is in contact with the human body, and the control processor can adjust the transmitting power of the mobile phone so as to reduce the radiation of the mobile phone and reduce the influence on the health of the human body.
Alternatively, the first signal here may also be a feedback signal. At this time, the sensor may determine whether the capacitance value is within the preset range value in real time or periodically. When it is determined that the capacitance value is outside the preset range, the sensor may send a first signal to the control processor to trigger the control processor to adjust the transmission power of the handset.
Further, in order to ensure normal communication of the mobile phone, the control processor may first obtain the signal strength of the base station after receiving the first signal. Then, according to the signal strength of the base station, the range of the current transmitting power of the mobile phone can be determined. I.e., the weaker the signal strength of the base station, the higher the transmit power of the handset. In this way, the control processor may adjust the transmit power of the handset under the control of the first signal based on the range of the transmit power of the current handset.
It can be understood that the larger the capacitance value change between the first metal part and the second metal part is, the closer the contact distance between the mobile phone and the human body is. At this time, the adjustment amount of the transmission power of the mobile phone can be determined according to the variation amount of the capacitance value.
In some application scenarios, when the capacitance value between the first metal part and the second metal part is restored to be within a preset range value, it is indicated that the mobile phone is not in contact with a human body currently. At this point, the sensor may stop sending the first signal. Therefore, the control processor stops adjusting the transmitting power of the mobile phone, so that the intensity of the mobile phone signal is restored to the intensity before adjustment. Alternatively, the sensor may send a second signal to the control processor. In this way, the control processor adjusts the transmit power of the handset again in the event that the second signal is received. For example, the transmitting power of the mobile phone is increased, and the signal strength of the mobile phone is improved.
According to the driving method provided by the embodiment of the application, the capacitor electrically connected with the first metal part and the second metal part can be conducted by transmitting the mobile phone signal to the second metal part, and then the mobile phone signal can be received and sent through the second metal part. I.e. to implement the antenna function of the second metal part. In addition, the driving method of the present application can also obtain the capacitance change between the first metal part and the second metal part, so that more functions can be realized by using the same. Thereby enriching the functions of the mobile phone and improving the user experience.
The embodiment of the application also provides the electronic equipment with the metal rear shell. The electronic device may include the driving circuit described in the above embodiments. The electronic equipment can be various electronic equipment which is provided with a metal rear shell and realizes an antenna function by utilizing part of the metal rear shell, such as a tablet personal computer, wearable equipment, a mobile phone and the like. As an example, the electronic device may be as shown in fig. 6, which shows a schematic structural diagram of an embodiment of the electronic device provided in this application.
As shown in fig. 6, the electronic device can implement the antenna function of the second metal component of the metal rear case by providing a capacitor. Thus, the electronic device can wirelessly communicate with other electronic devices through the second metal member, so that communication contents can be displayed in the display screen 601 mounted thereon.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A driver circuit for a metal back case handset, the driver circuit comprising: a first metal part, a second metal part, and a capacitor;
the first metal part is connected with a reference ground of the driving circuit;
the second metal part is electrically connected with a control processor of the mobile phone and is used for controlling the sending and receiving of mobile phone signals;
the metal rear shell of the mobile phone comprises the first metal part and the second metal part, and the first metal part and the second metal part are insulated from each other;
a first end of the capacitor is electrically connected to the first metal part and a second end of the capacitor is electrically connected to the second metal part.
2. The driving circuit according to claim 1, wherein a connection position between the second terminal of the capacitor and the second metal member, and a distance from both ends of the second metal member are positively correlated with a wavelength of the mobile phone signal.
3. The driving circuit of claim 1, further comprising a sensor for detecting a capacitance value between the first and second metal parts.
4. The drive circuit of claim 3, wherein a first end of the sensor is electrically connected to the second metal component and a second end of the sensor is electrically connected to the control processor.
5. The driving circuit of claim 4, wherein the sensor sends a first signal to the control processor when a capacitance value between the first metal part and the second metal part exceeds a preset range of values;
and the control processor adjusts the transmitting power of the mobile phone under the control of the first signal.
6. A driving method for a metal back shell mobile phone is characterized in that a control processor and a driving circuit are arranged on the mobile phone, and the driving circuit comprises the following steps: a first metal part, a second metal part, and a capacitor electrically connected to the first metal part and the second metal part, wherein a metal back case of the mobile phone includes the first metal part and the second metal part, the first metal part is connected to a reference ground of the driving circuit, and the driving method includes:
the control processor transmits a mobile phone signal to the second metal part and/or receives the mobile phone signal transmitted to the control processor by the second metal part;
the capacitor is conducted under the action of the mobile phone signal;
the second metal part sends the mobile phone signal and/or receives the mobile phone signal to be transmitted to the control processor.
7. The driving method according to claim 6, wherein the driving circuit further includes a sensor electrically connected to the second metal member, and the method further comprises:
the control processor receives a first signal sent by the sensor;
and adjusting the transmitting power of the mobile phone under the control of the first signal.
8. The driving method according to claim 7, wherein the adjusting the transmission power of the mobile phone under the control of the first signal comprises:
acquiring the signal intensity of a base station, and determining the range of the transmitting power of the mobile phone;
adjusting the transmit power of the handset under control of the first signal based on the determined range.
9. The driving method according to claim 7, wherein the sensor transmits a first signal when a capacitance value between the first metal member and the second metal member exceeds a preset range value.
10. An electronic device with a metal back cover, characterized in that the electronic device comprises a driver circuit according to one of claims 1-5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710891955.4A CN107659681B (en) | 2017-09-27 | 2017-09-27 | Drive circuit and drive method for metal back shell mobile phone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710891955.4A CN107659681B (en) | 2017-09-27 | 2017-09-27 | Drive circuit and drive method for metal back shell mobile phone |
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| CN107659681A CN107659681A (en) | 2018-02-02 |
| CN107659681B true CN107659681B (en) | 2020-07-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101982896A (en) * | 2010-09-28 | 2011-03-02 | 圆刚科技股份有限公司 | Antenna device |
| CN103311671A (en) * | 2012-03-13 | 2013-09-18 | 宏碁股份有限公司 | Adjustable slot antenna |
| CN106887677A (en) * | 2017-02-28 | 2017-06-23 | 北京小米移动软件有限公司 | Antenna and terminal |
| CN106972237A (en) * | 2017-04-14 | 2017-07-21 | 深圳市信维通信股份有限公司 | Ultrawide band high performance NFC antenna system based on shell after metal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2011135851A1 (en) * | 2010-04-27 | 2013-07-18 | パナソニック株式会社 | Wireless terminal |
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- 2017-09-27 CN CN201710891955.4A patent/CN107659681B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982896A (en) * | 2010-09-28 | 2011-03-02 | 圆刚科技股份有限公司 | Antenna device |
| CN103311671A (en) * | 2012-03-13 | 2013-09-18 | 宏碁股份有限公司 | Adjustable slot antenna |
| CN106887677A (en) * | 2017-02-28 | 2017-06-23 | 北京小米移动软件有限公司 | Antenna and terminal |
| CN106972237A (en) * | 2017-04-14 | 2017-07-21 | 深圳市信维通信股份有限公司 | Ultrawide band high performance NFC antenna system based on shell after metal |
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