CN105337052A - Antenna device of mobile terminal and mobile terminal - Google Patents

Abstract

The embodiment of the invention discloses an antenna device of a mobile terminal, which comprises: the system comprises a radio frequency transceiver, an external antenna, an internal antenna, an antenna plug, a terminal shell, an antenna socket, a controller and a radio frequency switch; the feed point of the external antenna is electrically connected with the feed pin of the antenna plug, and the ground point of the external antenna is electrically connected with the ground pin of the antenna plug; a feed pin of the antenna socket is electrically connected with the radio frequency switch, and a grounding pin of the antenna socket is grounded; the radio frequency switch is electrically connected with the radio frequency transceiver; the controller is electrically connected with the control end of the radio frequency switch; the controller is used for controlling the radio frequency switch to switch on the external antenna and to switch off the electric connection between the internal antenna and the radio frequency transceiver when detecting that the antenna plug is inserted into the antenna socket; or the radio frequency switch is controlled to be connected with the external antenna and the internal antenna, and the radio frequency transceiver transmits signals through the external antenna and the internal antenna. The embodiment of the invention also discloses a mobile terminal. By adopting the invention, the radio frequency performance of the mobile terminal can be improved.

Description

Antenna device of a mobile terminal and mobile terminal

technical field

The present invention relates to the field of antennas, in particular to an antenna device for a mobile terminal and the mobile terminal.

Background technique

The functions of mobile terminals are becoming more and more abundant. In addition to basic voice services and data services, Bluetooth transmission, GPS (Global Positioning System, Global Positioning System, GPS for short) positioning and WiFi (Wireless Fidelity, Wireless Fidelity, WiFi for short) can also be realized. ) function, in order to achieve the above functions, the mobile terminal is equipped with corresponding 2G/3G/4G/5G (2/3/4/5-Generation wireless telephone technology, the second/third/fourth/fifth generation wireless communication technology, referred to as 2G/3G/ 4G/5G) antenna, WiFi antenna, Bluetooth antenna and GPS antenna, each type of antenna is independently installed at a designated position inside the mobile terminal casing. The current mobile phone manufacturing is increasingly pursuing thinner and lighter mobile terminals. The space inside the mobile terminal is getting smaller and smaller. Various types of radio frequency antennas installed inside are likely to cause mutual interference, resulting in a lack of guarantee for service quality.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide an antenna device for a mobile terminal and the mobile terminal. The problem of poor radio frequency performance of the antenna of the mobile terminal in the prior art can be solved.

In order to solve the above technical problems, an embodiment of the present invention provides an antenna device for a mobile terminal, including:

RF transceiver, external antenna, built-in antenna, antenna plug, terminal shell, antenna socket, RF switch and N frequency band matching circuits, N is an integer greater than 0; among them,

The external antenna and the antenna plug are located outside the terminal shell, the antenna socket is located on the terminal shell, the radio frequency switch, the controller, the built-in antenna, the radio frequency transceiver and the The N frequency band matching circuits are located in the terminal shell;

The radio frequency switch has 1 fixed end and N fixed ends, the feeding point of the external antenna is electrically connected to the feeding pin of the antenna plug, and the grounding point of the external antenna is connected to the The ground pin of the antenna plug is electrically connected; the feed pin of the antenna socket is electrically connected to the moving end of the radio frequency switch, and the N fixed ends of the radio frequency switch pass through the N frequency band matching circuits respectively. The corresponding frequency band matching circuit is electrically connected to the radio frequency transceiver, the radio frequency transceiver is electrically connected to the built-in antenna, and the controller is electrically connected to the radio frequency switch;

The controller is used to obtain the current working frequency band when the antenna plug is inserted into the antenna socket, and control the moving end of the radio frequency switch to connect to the frequency band matching circuit corresponding to the current working frequency band;

The radio frequency transceiver is used to use the signal received by the external antenna as a diversity signal, and use the signal received by the internal antenna as a main set signal, and combine the diversity signal and the main set signal to generate Composite signal.

Wherein, each of the N frequency band matching circuits includes: a power amplifier and a frequency band filter.

Wherein, it also includes: antenna housing, LNA, filter and battery, battery, filter and LNA are arranged inside the antenna housing, the feeding point of the external antenna passes through the filter and the LNA and the The feed pin of the antenna plug is electrically connected, and the battery supplies power to the LNA.

Among them, it also includes: antenna shell, LNA and filter, the feed point of the external antenna is electrically connected with the feed pin of the antenna plug through the filter and the LNA; the antenna socket includes a power supply The antenna plug includes a power supply pin, the power supply pin of the LNA is electrically connected to the power supply pin of the antenna plug, and the power supply pin of the antenna socket is electrically connected to the power module in the terminal shell .

Wherein, the terminal housing includes: a closed metal middle frame without breakpoints and a metal plate as the main ground, and the built-in antenna includes: a first metal trace and a second metal trace;

Wherein, the metal middle frame includes two side frames connected into a frame shape, a top frame and a bottom frame; the two ends of the top frame are respectively connected to the tops of the two side frames, and the two ends of the bottom frame The ends are respectively connected to the bottom ends of the two side frames; the two sides of the metal plate are respectively seamlessly connected with the two side frames of the metal middle frame, and the bottom edge of the metal plate is connected to the metal middle frame The bottom frame of the frame forms a first window, the first metal wiring and the second metal wiring are arranged in the first window, the first metal wiring is connected to the metal middle frame, and the The second metal wiring is connected to the metal middle frame and the metal plate at the same time.

Wherein, the first metal wiring and the second metal wiring are on the same plane.

Wherein, a transmission line is provided between the external antenna and the antenna plug, and the transmission line is a 50 ohm impedance transmission line.

Wherein, the controller is a baseband processor.

Wherein, the antenna socket is an earphone socket or a USB socket.

Correspondingly, an embodiment of the present invention provides a mobile terminal, including: the antenna device described in any one of the foregoing.

Implementing the embodiment of the present invention has the following beneficial effects:

The external antenna outside the terminal shell is connected to the electrical connection between the external antenna and the RF transceiver or the electrical connection between the external antenna and the built-in antenna through the matching of the antenna socket and the antenna socket. The RF transceiver uses an external antenna or an external antenna. The new antenna transmission signal synthesized by the built-in antenna and the built-in antenna can improve the radio frequency performance of the antenna device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a first structural schematic diagram of an antenna device for a mobile terminal provided by an embodiment of the present invention;

FIG. 2 is a second structural schematic diagram of an antenna device for a mobile terminal provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram III of an antenna device for a mobile terminal provided by an embodiment of the present invention;

FIG. 4 is a fourth structural schematic diagram of an antenna device for a mobile terminal provided by an embodiment of the present invention.

detailed description

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second" and "third" in the specification and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the term "comprise", as well as any variations thereof, is intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Referring to FIG. 1 , it is a schematic structural diagram of an antenna device provided by an embodiment of the present invention. In an embodiment of the present invention, the antenna device includes: an external antenna 10 , an antenna plug 101 , a terminal housing 11 , an antenna socket 111 , and a built-in antenna 112 , RF switch 113, RF transceiver 114, controller 115

The external antenna 10 and the antenna plug 101 are located outside the terminal housing 11, and the antenna socket 111 is disposed on the terminal housing 11, wherein the position where the antenna socket 111 is disposed on the terminal housing 11 can be the top, the middle or the bottom of the terminal housing 11. The radio frequency switch 113, the controller 115, the built-in antenna 112, and the radio frequency transceiver 114 are located inside the terminal housing. Wherein, the shapes of the antenna plug 10 and the antenna socket 114 match each other. When the antenna plug 10 is inserted into the antenna socket 114, the feed pin of the antenna plug 101 is electrically connected to the feed pin of the antenna socket 111, and the ground pin of the antenna plug 101 The pin is electrically connected to the ground pin of the antenna socket 111 . The types of the antenna socket 101 and the antenna socket 111 are not limited in the present invention, for example, they may be a combination of an earphone plug and an earphone socket, a combination of a USB plug and a USB socket, or a custom shape.

The connection relationship of the above-mentioned components is as follows: the feed point of the external antenna 10 is electrically connected to the feed pin of the antenna plug 101, the ground point of the external antenna 10 is electrically connected to the ground pin of the antenna plug 101; The feed pin is electrically connected to the RF switch 113 , the ground pin of the antenna socket 111 is grounded; the RF switch 113 is electrically connected to the RF transceiver 114 ; the controller 115 is electrically connected to the control terminal of the RF switch 114 .

The working process of the antenna device is: when the controller 115 detects that the antenna plug 101 is inserted into the antenna socket 111, it controls the radio frequency switch to connect the external antenna 10 and disconnects the electrical connection between the built-in antenna 112 and the radio frequency transceiver 114. When the radio frequency switch can be a single pole double throw switch; or when the controller 115 detects that the antenna plug 115 is inserted into the antenna socket 111, it controls the radio frequency switch 113 so that the feed points of the external antenna 10 and the built-in antenna 112 are electrically connected to synthesize a new transceiver Antenna, RF Transceiver 114 transmits signals through the new transceiver antenna.

Wherein, the method that the controller detects that the antenna plug 101 is inserted into the antenna socket 111 may be to connect a power supply and a pull-up resistor to the feed pin of the antenna socket, and when the antenna plug is inserted into the antenna socket 111, the pull-up resistor The voltage changes from high level to low level, and when the controller detects the change from low level to high level, it determines that the antenna plug is inserted into the antenna socket. The method for the controller to detect that the antenna plug is inserted into the antenna socket 114 is not limited thereto.

Optionally, the radio frequency switch is a single pole double throw switch, the radio frequency transceiver is electrically connected to the moving end of the single pole double throw switch, and the feed pin of the antenna socket is connected to the second pole of the single pole double throw switch. A fixed end is electrically connected, the built-in antenna is electrically connected to the second fixed end of the single-pole double-throw switch, and the controller is electrically connected to the control end of the single-pole double-throw switch.

Wherein, when the controller detects that the antenna plug is inserted into the antenna socket, it controls the radio frequency switch to connect the external antenna and disconnect the electrical connection between the built-in antenna and the radio frequency transceiver, and the radio frequency switch is a single pole double throw switch.

Optionally, it also includes: an antenna housing, an LNA, a filter, and a battery, the antenna housing is provided with a battery, a filter, and an LNA, and the feed point of the external antenna passes through the filter and the LNA and The feed pins of the antenna plug are electrically connected, and the battery supplies power to the LNA.

Wherein, referring to Fig. 3, an external antenna 301, a filter 302, an LNA and a battery 303 are arranged in the antenna housing 30, an antenna plug 304 is arranged on the antenna housing 30, the external antenna 301 has a feeding point and a grounding point, and the antenna plug 304 has a feed pin and a ground pin, and the feed point of the external antenna 301 is electrically connected to the feed pin of the filter 302, the LNA and the antenna plug 304, and the filter is used to filter the radio frequency signal received by the external antenna 301 out-of-band noise, the battery 303 supplies power to the LNA304, and the LNA304 is used to amplify the filtered radio frequency signal. A built-in antenna 312, a controller 315, a radio frequency transceiver 314, and a radio frequency switch 313 are arranged in the terminal casing 31, and an antenna socket 311 is arranged on the terminal casing 31, and the connection relationship of various components inside and on the surface of the terminal casing can refer to the description in FIG. 1 , which will not be repeated here.

Optionally, it also includes: an antenna shell, an LNA and a filter, the feed point of the external antenna is electrically connected to the feed pin of the antenna plug through the filter and the LNA; the antenna socket Including a power supply pin, the antenna plug includes a power supply pin, the power supply pin of the LNA is electrically connected to the power supply pin of the antenna plug, and the power supply pin of the antenna socket is connected to the power supply module in the terminal shell electrical connection.

Wherein, referring to Fig. 4, an external antenna 401, a filter 404 and an LNA 403 are arranged in the antenna housing 40. An antenna plug 402 is arranged at the bottom of the antenna housing 40. Pin, ground pin and power supply pin, the feed point of external antenna 401 is electrically connected through the feed pin of filter 404, LNA403 and antenna plug 402, the power supply pin of LNA403 and the power supply pin of antenna plug 402 are electrically connected connect. The terminal housing 41 is provided with an antenna socket, and the terminal housing 41 is provided with a radio frequency transceiver 414, a built-in antenna 412, a controller 415, a power module 415 and a radio frequency switch 413, and the antenna socket 411 has a power supply pin, a feed pin and a grounding pin. Pin, the power supply pin of the antenna socket 411 is electrically connected to the power supply module 416, and the connection relationship and working principle of other components in the terminal housing 41 can refer to the embodiment of FIG. 1 , and will not be repeated here.

Wherein, the terminal housing includes: a closed metal middle frame without breakpoints and a metal plate as the main ground, and the built-in antenna includes: a first metal trace and a second metal trace;

Wherein, the metal middle frame includes two side frames connected into a frame shape, a top frame and a bottom frame; the two ends of the top frame are respectively connected to the tops of the two side frames, and the two ends of the bottom frame The ends are respectively connected to the bottom ends of the two side frames; the two sides of the metal plate are respectively seamlessly connected with the two side frames of the metal middle frame, and the bottom edge of the metal plate is connected to the metal middle frame The bottom frame of the frame forms a first window, the first metal wiring and the second metal wiring are arranged in the first window, the first metal wiring is connected to the metal middle frame, and the The second metal wiring is connected to the metal middle frame and the metal plate at the same time.

Specifically, the antenna device includes: an external antenna with an antenna plug, a built-in antenna, a terminal housing with an antenna socket, a filter, a radio frequency transceiver and a controller, and a radio frequency switch; the terminal housing includes a metal middle frame 26, a main ground The metal plate (the gray area in Figure 2) and the back cover (not shown), the built-in antenna includes a first metal trace 24 and a second metal trace 25, the middle frame is made of metal, and the grid frame of the metal middle frame is provided with The antenna socket 28, the antenna socket includes a feed pin and a ground pin. The exterior of the terminal shell is provided with an external antenna, antenna shell, filter and antenna plug. The antenna plug has a feed pin and a ground pin. connection, the grounding of the external antenna is electrically connected to the grounding pin of the antenna plug, the antenna socket 28 has a feed pin and a ground pin, the antenna plug and the antenna socket 28 are matched and connected, and the feed pin of the antenna socket 28 and through The radio frequency transceiver circuit is electrically connected with the built-in antenna and the radio frequency transceiver circuit respectively.

The metal middle frame 26 is a closed structure without breakpoints. The metal middle frame includes a top frame 20, a left side frame 22, a right grid 21 and a bottom frame 23. The two sides of the metal plate are seamlessly connected with the two sides of the metal middle frame 26. , the top edge of the metal plate and the top frame of the metal middle frame form a first window, the bottom edge of the metal plate and the bottom frame of the metal middle frame form a second window, and the first metal wiring 24 and the second metal wiring 25 are located at the second window. In the second window, a printed circuit board is fixedly arranged on the metal plate, and the radio frequency switch 27 is installed on the printed circuit board, and the radio frequency switch 27 is electrically connected with one end of the second metal trace 25 and the feed pin of the antenna socket respectively. , the ground pin of the antenna socket is electrically connected to the metal plate, and the other end of the second metal trace is electrically connected to the bottom frame of the metal middle frame. Outside the mobile terminal, an external antenna is arranged in the antenna shell, the feed point of the external antenna is electrically connected to the feed pin of the antenna plug through a filter, and the ground point of the external antenna is electrically connected to the ground pin of the antenna plug; When the antenna plug is inserted into the antenna socket, the feed pin of the antenna plug is electrically connected to the feed pin of the antenna socket, and the ground pin of the antenna plug is electrically connected to the ground pin of the antenna socket.

Optionally, the first metal trace and the second metal trace are on the same plane as the second metal trace.

Optionally, a transmission line is provided between the external antenna and the antenna plug, and the transmission line is a 50 ohm impedance transmission line.

Optionally, the controller is a baseband processor.

Optionally, the antenna socket is an earphone socket or a USB socket.

Wherein, the terminal shell has its own earphone socket and USB socket, and the existing earphone socket and USB socket are used as the antenna socket, and the antenna socket of the external antenna is correspondingly an earphone plug and a USB plug. In addition, an additional antenna socket can also be provided on the terminal shell of the mobile terminal, such as an antenna socket with a threaded port, and an antenna plug with a threaded column is provided for the external antenna, and the antenna plug and the antenna socket are mated and connected.

To implement the embodiment of the present invention, the external antenna outside the terminal shell is connected to the electrical connection between the external antenna and the radio frequency transceiver or the electrical connection between the external antenna and the built-in antenna through the matching of the antenna socket and the antenna socket, and the radio frequency transceiver The device uses an external antenna or a new antenna synthesized by an external antenna and a built-in antenna to transmit signals, which can improve the radio frequency performance of the antenna device.

The embodiment of the present invention also provides a mobile terminal, including the antenna device described in the above embodiments. It should be understood that the mobile terminal includes but is not limited to carrying Or mobile terminals with other operating systems, such as mobile phones. Other mobile terminals are also possible, such as laptops or tablets or desktop computers with touch-sensitive surfaces (eg, touch screen displays and/or touchpads).

In the following discussion, a mobile terminal including a display and a touch-sensitive surface is presented. It should be understood, however, that a mobile terminal may include one or more other physical user interface devices, such as a physical keyboard, mouse and/or joystick.

Mobile terminals typically support multiple applications, such as one or more of the following: drawing applications, rendering applications, word processing applications, web page creation applications, disk editing applications, spreadsheet applications, gaming applications , phone applications, video conferencing applications, email applications, instant messaging applications, exercise support applications, photo management applications, digital camera applications, digital video camera applications, web browsing applications, digital music players applications, and/or digital video player applications.

The various applications executable on the mobile terminal may use at least one common physical user interface device, such as a touch-sensitive surface. One or more functions of the touch-sensitive surface and corresponding information displayed on the mobile terminal may be adjusted and/or varied from one application to the next and/or within a corresponding application . In this way, the common physical architecture of the mobile terminal, such as a touch-sensitive surface, can support various applications with a user interface that is intuitive and clear to the user.

What is disclosed above is only a preferred embodiment of the present invention, and of course it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand all or part of the process for realizing the above embodiments, and according to the rights of the present invention The equivalent changes required still belong to the scope covered by the invention.

Claims (10)

1. An antenna device of a mobile terminal, comprising: the radio frequency switch comprises a radio frequency transceiver, an external antenna, an internal antenna, an antenna plug, a terminal shell, an antenna socket, a controller and the radio frequency switch; wherein,

the external antenna and the antenna plug are positioned outside the terminal shell, the antenna socket is positioned on the terminal shell, and the internal antenna, the radio frequency switch and the controller are positioned inside the terminal shell;

the feed point of the external antenna is electrically connected with the feed pin of the antenna plug, and the ground point of the external antenna is electrically connected with the ground pin of the antenna plug; a feed pin of the antenna socket is electrically connected with the radio frequency switch, and a grounding pin of the antenna socket is grounded; the radio frequency switch is electrically connected with the radio frequency transceiver; the controller is electrically connected with the control end of the radio frequency switch;

the controller is used for controlling the radio frequency switch to switch on the external antenna and switch off the electric connection between the internal antenna and the radio frequency transceiver when detecting that the antenna plug is inserted into the antenna socket; or controlling the radio frequency switch to switch on the external antenna and the internal antenna, and the radio frequency transceiver transmits signals through the external antenna and the internal antenna.

2. The antenna apparatus of claim 1, wherein the radio frequency switch is a single-pole double-throw switch, the radio frequency transceiver is electrically connected to a moving terminal of the single-pole double-throw switch, a feed pin of the antenna socket is electrically connected to a first stationary terminal of the single-pole double-throw switch, the internal antenna is electrically connected to a second stationary terminal of the single-pole double-throw switch, and the controller is electrically connected to a control terminal of the single-pole double-throw switch.

3. The antenna device according to claim 1 or 2, further comprising: the antenna comprises an antenna shell, a Low Noise Amplifier (LNA), a filter and a battery, wherein the battery, the filter and the LNA are arranged in the antenna shell, a feed point of the external antenna is electrically connected with a feed pin of an antenna plug through the filter and the LNA, and the battery supplies power to the LNA.

4. The antenna apparatus of claim 1, further comprising: the feed point of the external antenna is electrically connected with the feed pin of the antenna plug through the filter and the LNA; the antenna socket comprises a power supply pin, the antenna plug comprises a power supply pin, the power supply pin of the LNA is electrically connected with the power supply pin of the antenna plug, and the power supply pin of the antenna socket is electrically connected with a power supply module in the terminal shell.

5. The antenna assembly of claim 1, wherein the terminal housing comprises: the metal middle frame without break point and the metal plate as the main ground are closed, the built-in antenna comprises: a first metal trace and a second metal trace;

the metal middle frame comprises two side frames, a top frame and a bottom frame which are connected into a frame shape; two ends of the top frame are connected to the top ends of the two side frames respectively, and two ends of the bottom frame are connected to the bottom ends of the two side frames respectively; the two side edges of the metal plate are respectively connected with the two side frames of the metal middle frame in a seamless mode, the bottom edge of the metal plate and the bottom frame of the metal middle frame form a first window, the first metal wiring and the second metal wiring are arranged in the first window, the first metal wiring is connected with the metal middle frame, and the second metal wiring is simultaneously connected with the metal middle frame and the metal plate.

6. The antenna device according to claim 5, wherein the first metal trace and the second metal trace are on a same plane.

7. The antenna device according to claim 1, wherein a transmission line is provided between the external antenna and the antenna plug, and the transmission line is a 50-ohm impedance transmission line.

8. The antenna device according to any of claims 1-7, wherein the antenna socket is a headset socket or a Universal Serial Bus (USB) socket.

9. The antenna apparatus of claim 8, wherein the control is a baseband processor.

10. A mobile terminal, comprising: an antenna device as claimed in any one of claims 1 to 9.