CN106921766B - Circuit board structure, antenna device and mobile terminal - Google Patents

Abstract

The embodiment of the present invention discloses a circuit board structure, an antenna device, and a mobile terminal. The circuit board structure is applied to a mobile terminal. The mobile terminal includes a terminal body. The circuit board structure includes a first main board, a second main board, a radio frequency modules and soft boards, the radio frequency module includes a radio frequency main set module, the terminal body includes a bottom end and a top set opposite to the bottom end, the first main board is fixed to the bottom end, and the second main board is fixed to the bottom end At the top, the first main board and the second main board are arranged oppositely and connected by the soft board; the first main board is provided with a first radio frequency area for approaching the main set antenna, and the first radio frequency area A main set antenna feed point is arranged inside, and the radio frequency main set module is fixed in the first radio frequency area and is electrically connected to the main set antenna feed point. The embodiment of the present invention can improve the performance of the antenna.

Description

Circuit board structure, antenna device and mobile terminal

technical field

The invention relates to the field of electronic technology, in particular to a circuit board structure, an antenna device and a mobile terminal.

Background technique

At present, the antenna of the mobile phone separates the radio frequency module and the antenna feed point, and the radio frequency signal is transmitted from the radio frequency module to the antenna feed point through a cable. Due to the long distance between the RF module and the antenna feed point, the length of the cable connecting the RF module and the antenna feed point is long, which causes attenuation of the RF signal transmitted by the cable and affects the performance of the antenna.

Contents of the invention

Embodiments of the present invention provide a circuit board structure, an antenna device, and a mobile terminal, which can improve antenna performance.

The first aspect of the embodiments of the present invention provides a circuit board structure, which is applied to a mobile terminal. The mobile terminal includes a terminal body. The circuit board structure includes a first main board, a second main board, a radio frequency module, and a soft board. The radio frequency The module includes a radio frequency master module, the terminal body includes a bottom end and a top set opposite to the bottom end, the first main board is fixed to the bottom end, and the second main board is fixed to the top end, wherein:

The first main board is arranged opposite to the second main board and connected through the flexible board;

The first main board is provided with a first radio frequency area close to the main antenna, the first radio frequency area is provided with a main antenna feed point, the radio frequency main module is fixed on the first radio frequency area, and Electrically connect the main set antenna feed point.

The second aspect of the embodiment of the present invention provides an antenna device, the antenna device includes the circuit board structure described in the first aspect of the embodiment of the present invention, the antenna device also includes a main antenna radiator and a diversity antenna radiator, the The main antenna radiator and the diversity antenna radiator are electrically connected to the main antenna feed point and the diversity antenna feed point respectively.

The third aspect of the embodiment of the present invention further provides a mobile terminal, the mobile terminal includes the antenna device described in the second aspect of the embodiment of the present invention, the mobile terminal further includes a terminal body, the circuit board, the main set Both the antenna radiator and the diversity antenna radiator are fixed on the terminal body.

In the circuit board structure, antenna device, and mobile terminal of the embodiments of the present invention, a first radio frequency area close to the main antenna is provided through the first main board, and a feed point of the main antenna is provided in the first radio area, The radio frequency main set module is fixed in the first radio frequency zone, and the radio frequency main set module and the main set antenna feed point are electrically connected in the first radio frequency zone, so that the radio frequency main set module and the The length of the cable between the feed points of the main set antenna is shortened, or the cable is omitted, which reduces the attenuation of the radio frequency signal and improves the performance of the antenna. Since the first main board and the second main board are arranged opposite to each other and are connected through the flexible board, the flexible board is only used for wiring, and there is no need to install components on the flexible board, which can save the length of the flexible board and reduce the number of flexible boards used.

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 schematic structural diagram of a circuit board provided by an embodiment of the present invention;

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

Fig. 3 is a schematic structural diagram of an antenna device provided by an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments 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 creative efforts fall within the protection scope of the present invention.

The terms "first", "second" and the like in the description 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 terms "include" and "have", as well as any variations thereof, are 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 devices.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

The mobile terminals involved in the embodiments of the present invention may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment (User Equipment, UE), mobile station (Mobile Station, MS), terminal device (terminal device) and so on. For convenience of description, the devices mentioned above are collectively referred to as mobile terminals.

The following describes the embodiments of the present invention in detail.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a circuit board structure provided by an embodiment of the present invention. As shown in FIG. 1, the circuit board structure 100 includes a first main board 10, a second main board 20, a radio frequency module 30 and a soft board 40, the radio frequency module 30 includes a radio frequency master module 31, the circuit board structure 100 is applied to a mobile terminal 300, the mobile terminal 300 includes a terminal body 310, and the terminal body 310 includes a bottom end 311 and a bottom end 311 The top 312 is set, the first main board 10 is fixed on the bottom 311, and the second main board 20 is fixed on the top 312, wherein:

The first main board 10 is opposite to the second main board 20 and connected through the flexible board 40;

The first mainboard 10 is provided with a first radio frequency area 11 for approaching the main antenna 50, the first radio frequency area 11 is provided with a main antenna feed point 111, and the radio frequency main module 31 is fixed on the The first radio frequency zone 11 is electrically connected to the feed point 111 of the main antenna.

In the prior art, the radio frequency main set module 31 is generally arranged on the main board at the top of the mobile terminal 300, and the main set antenna 50 is arranged on the main board (i.e. the first main board 10) at the bottom of the mobile terminal 300, and the radio frequency main set module 31 and the main set antenna 50 are connected by a very long cable, which reduces the transmission efficiency between the radio frequency main set module 31 and the main set antenna 50, and reduces the over-the-air (OTA) performance of the mobile terminal 300, especially When the mobile terminal 300 is in a weak signal environment, the user's network experience is seriously affected.

In the implementation of the present invention, the first main board 10 is provided with a first radio frequency area 11 close to the main antenna 50, and the first radio frequency area 11 is provided with a feed point 111 of the main antenna 50, and the radio frequency main The collection module 31 is fixed on the first radio frequency area 11, and the radio frequency main collection module 31 is electrically connected with the feed point 111 of the main collection antenna 50 in the first radio frequency area 11, so that the radio frequency main collection module 31 The length of the cable between the feed point 111 of the main antenna 50 is shortened, or the cable is omitted, which reduces the attenuation of the radio frequency signal and improves the performance of the antenna. On the other hand, since the first main board 10 and the second main board 20 are arranged opposite to each other and connected by the flexible board 40, the flexible board 40 is only used for wiring, and there is no need to install components on the flexible board 40, which can save the length of the flexible board 40. Reduce the number of flexible boards 40 used. Soft board, also known as flexible circuit board (Flexible Printed Circuit referred to as FPC).

In the embodiment of the present invention, both the first main board 10 and the second main board 20 are composed of a substrate and circuits arranged on the substrate. The first radio frequency area 11 is an area where electronic components are arranged on one side of the first motherboard 1 . The boundary of the first radio frequency area 11 is defined as being able to enclose the main radio frequency module 31 and the main antenna feed point 111 . When the first motherboard 10 is fixed on the mobile terminal 300 , the first radio frequency area 11 is close to the main antenna 50 of the mobile terminal 300 . It can be understood that the first motherboard 10 may also include other areas outside the first radio frequency area 11, and the first area 11 close to the main antenna 50 refers to the distance from the first area 11 to the main antenna 50. The distance is smaller than the distance from other areas of the first main board 10 to the main antenna 50 . The distance from the first radio frequency zone 11 to the main antenna 50 is reduced, and the cable length between the first radio frequency zone 11 and the main antenna 50 is reduced or the first radio frequency zone 11 to the main antenna 50 is omitted. cables. The radio frequency main set module 31 may be electrically connected to the main set antenna feed point 111 through a metal shrapnel. The main antenna feed point 111 can be electrically connected to the main antenna radiator of the main antenna 50 through a metal shrapnel, so that when the radio frequency main module 31 sends the main radio frequency signal to the main antenna radiator through the radio frequency transmission module The cable for transmitting the main radio frequency signal is omitted between the main antenna feed point 111 and the main antenna 50, which reduces attenuation of the main radio signal and improves antenna performance. Optionally, the main antenna feed point 111 may be located at an edge of the first radio frequency region 11 close to the main antenna 50 .

In the embodiment of the present invention, the radio frequency master module 31 is composed of a plurality of electronic components. The radio frequency main module 31 is responsible for feeding radio frequency signals to the main antenna 50 , and the radio frequency main module 31 is a radio frequency feeding source of the main antenna 50 . The multiple electronic components of the radio frequency main assembly module 31 are scattered and arranged in the first radio frequency area 11, making full use of the use area of the first radio frequency area 11, so that the first radio frequency area 11 The area of a radio frequency area 11 is minimized, thereby fully optimizing the volume of the circuit board 10 . Since the radio frequency main set module 31 and the main set antenna feed point 111 are located in the first radio frequency zone 11, the distance between the radio frequency main set module 31 and the main set antenna feed point 111 is decrease. The radio frequency main set module 31 and the main set antenna feed point 111 may be directly electrically connected (for example, electrically connected through a shrapnel), or may be electrically connected through a shorter cable, which can reduce the number of connections. The length of the cable between the radio frequency main set module 31 and the main set antenna feed point 111 , or the cable connecting the radio frequency main set module 31 and the main set antenna feed point 111 is omitted.

In one embodiment, the radio frequency module further includes a radio frequency diversity module 32, and a diversity antenna feed point 112 is also arranged in the first radio frequency area 11, and the radio frequency diversity module 32 is fixed on the first radio frequency area 11 , and electrically connected to the diversity antenna feed point 112.

The present invention implements that the radio frequency diversity module 32 and the radio frequency main collection module 31 are all arranged on the main board (i.e. the first main board 10) at the bottom of the mobile terminal 300, because the radio frequency diversity module 32 and the diversity antenna feed point 112 are all arranged on the first main board 10. In the radio frequency area 11, cables are omitted between the radio frequency diversity module 32 and the diversity antenna feed point 112, which reduces attenuation of radio frequency signals and improves antenna performance.

In the embodiment of the present invention, the radio frequency diversity module 32 is composed of multiple electronic components. The radio frequency diversity module 32 is responsible for feeding radio frequency signals to the diversity antenna, that is, the radio frequency diversity module 32 is a radio frequency feed source of the diversity antenna 60 . The multiple electronic components of the radio frequency main collection module 31 and the multiple electronic components of the radio frequency diversity module 32 are scattered and arranged in the first radio frequency area 11, which can make full use of the first radio frequency area 11 The use area minimizes the area of the first radio frequency region 11, thereby fully optimizing the volume of the circuit board 10.

Wherein, the radio frequency diversity module 32 and the diversity antenna feed point 112 can be directly electrically connected, and can also be electrically connected through a shorter cable, which can reduce the number of connections between the radio frequency diversity module 32 and the diversity antenna. The cable length of the antenna feed point 112, or the cable connecting the radio frequency diversity module 32 and the diversity antenna feed point 112 is omitted.

The radio frequency diversity module 32 may be electrically connected to the diversity antenna feed point 112 through a metal shrapnel. The diversity antenna feed point 112 can be electrically connected to the diversity antenna radiator of the diversity antenna 60 through a metal shrapnel, so that when the radio frequency diversity module 32 sends the diversity radio frequency signal to the diversity antenna radiator through the radio frequency transmission module, the diversity antenna feed The cable for transmitting the diversity radio frequency signal is omitted between the electric point 112 and the diversity antenna 60, which reduces the attenuation of the diversity radio frequency signal and improves the performance of the antenna. Optionally, the diversity antenna feed point 112 may be located at an edge of the first radio frequency region 11 close to the diversity antenna 60 .

In one embodiment, the radio frequency module 30 further includes a radio frequency transceiver chip 33, the radio frequency transceiver chip 33 is fixed on the first radio frequency area 11 and electrically connected to the radio frequency main collection module 31 and the radio frequency diversity module 32 .

In the embodiment of the present invention, the radio frequency transceiver chip 33 is responsible for receiving radio frequency signals or sending radio frequency signals. The radio frequency transceiver chip 33 is electrically connected to the radio frequency master module 31 , obtains radio frequency signals from the radio frequency master module 31 , or sends radio frequency signals to the radio frequency master module 31 . The radio frequency transceiver chip 33 is electrically connected to the radio frequency diversity module 32 , and obtains radio frequency signals from the radio frequency diversity module 32 . The radio frequency transceiver chip 33 may be located in the first radio frequency zone 11 and is closer to the radio frequency main collection module 31 and the radio frequency diversity module 32 . The boundary of the first radio frequency area 11 may also surround the radio frequency transceiver chip 33 . The cable length between the radio frequency transceiver chip 33 and the radio frequency master module 31 is reduced, or the cable between the radio frequency transceiver chip 33 and the radio frequency master module 31 is removed, so that the radio frequency transceiver The chip 33 reduces the attenuation degree of the radio frequency signal sent and received, which improves the performance of the antenna. The cable length between the radio frequency transceiver chip 33 and the radio frequency diversity module 32 is reduced, or the cable between the radio frequency transceiver chip 33 and the radio frequency diversity module 32 is removed, so that the radio frequency transceiver chip 33 The degree of attenuation of the transmitting and receiving radio frequency signals is reduced, which improves the performance of the antenna. Certainly, in other implementation manners, the radio frequency transceiving chip 33 may also be located close to the edge of the first radio frequency area 11 .

In one embodiment, the first radio frequency area is further provided with a network antenna feed point 113 , and the network antenna feed point 113 is electrically connected to the radio frequency transceiver chip 33 .

In the embodiment of the present invention, the cable length between the network antenna feed point 113 and the radio frequency transceiver chip 33 is reduced, or the cable between the network antenna feed point 113 and the radio frequency transceiver chip 33 is removed. The cables reduce the radio frequency signal attenuation at the feed point 113 of the network antenna and improve the performance of the antenna.

In one embodiment, the circuit board structure further includes a GPS radio frequency module 70 and/or a wifi radio frequency module 80, the second motherboard 20 is provided with a second radio frequency area 21, and the GPS radio frequency module 70 and/or wifi radio frequency The module 80 is fixed on the second radio frequency area 21 and electrically connected to the network antenna feeding point 113 .

In the embodiment of the present invention, the GPS radio frequency module 70 is fixed in the second radio frequency area 21 and electrically connected to the network antenna feed point 113 . The electronic components in the second radio frequency zone 21 may be electrically connected with the electronic components in the first radio frequency zone 11 through cables.

The network antenna feeding point 113 is located in the first radio frequency area 11 close to the radio frequency transceiver chip 40 . The second radio frequency area 21 can be located at the second main board 20 close to the GPS antenna radiator, so that the distance between the GPS radio frequency module 70 and the GPS antenna radiator is reduced, and then the GPS radio frequency module 70 can be removed. The cable between the GPS antenna radiator and the GPS antenna radiator, or reduce the cable length between the GPS radio frequency module 70 and the GPS antenna radiator. The GPS radio frequency module 70 is electrically connected to the network antenna feeding point 113 through a cable.

The second radio frequency area 21 can be located at the second motherboard 20 close to the wifi antenna radiator, so that the distance between the wifi radio frequency module 80 and the wifi antenna radiator is reduced, and then the wifi radio frequency module 80 can be removed the cable between the wifi antenna radiator, or reduce the cable length between the wifi radio frequency module 80 and the wifi antenna radiator. The wifi radio frequency module 80 is electrically connected to the network antenna feeding point 113 through a cable.

In one embodiment, the circuit board structure further includes a baseband 90, the baseband 90 is fixed to the second radio frequency area 21, and the baseband 90 is electrically connected to the radio frequency main collection module 31 and the radio frequency diversity module 32 .

In this embodiment, the baseband 90 processes radio frequency signals and protocol radio frequency signals for the radio frequency main set module 31 , radio frequency diversity module 32 , GPS radio frequency module 70 and wifi radio frequency module 80 . The baseband 90 is close to the GPS radio frequency module 70 and the wifi radio frequency module 80, thereby reducing the radio frequency signal attenuation of the GPS radio frequency module 70 and the wifi radio frequency module 80, and improving antenna performance.

In one embodiment, the radio frequency main collection module 31 is electrically connected to the main antenna feed point 111 through a first elastic piece, and the radio frequency diversity module 32 is electrically connected to the diversity antenna feed point 112 through a second elastic piece.

In one embodiment, the flexible board 40 is provided with wires (not shown in FIG. 1 ), and the wires are used to connect the signal lines of the first main board 10 and the signal lines of the second main board 20 .

In the embodiment of the present invention, since the first main board 10 and the second main board 20 are arranged oppositely and are connected through the flexible board 40, the flexible board 40 is only used for wiring, and there is no need to install components on the flexible board 40, which can save the cost of the flexible board 40. length, reducing the number of soft boards 40 used.

The embodiment of the present invention also provides an antenna device 200, please refer to FIG. 2. FIG. 2 is a schematic structural diagram of an antenna device provided by an embodiment of the present invention. As shown in FIG. 2, the antenna device 200 includes the circuit board structure 100, the antenna device 200 further includes a main antenna radiator 210 and a diversity antenna radiator 220, the main antenna radiator 210 and the diversity antenna radiator 220 are respectively electrically connected to the main antenna feed point 111 and diversity antenna feed point 112 .

In the embodiment of the present invention, the main antenna radiator 210 is close to the first radio frequency zone 11 , and the diversity antenna radiator 220 is close to the second radio frequency zone 21 . The antenna radiator 210 of the main set includes a mid-low frequency branch 211 and a high frequency branch 212 . The mid-low frequency branch 211 is responsible for transmitting or receiving mid-low frequency signals. The high frequency branch 212 is responsible for transmitting or receiving high frequency signals. The diversity antenna radiator 220 is responsible for receiving low frequency signals, intermediate frequency signals and high frequency signals.

The embodiment of the present invention also provides a mobile terminal 300. Please refer to FIG. 3. FIG. 3 is a schematic structural diagram of an antenna device provided by an embodiment of the present invention. As shown in FIG. The first main board 10 , the second main board 20 , the main antenna radiator 210 and the diversity antenna radiator 220 are all fixed on the terminal body 310 .

In the embodiment of the present invention, the terminal body 310 is composed of functional components such as a housing, a display screen, and a battery. Specifically, the terminal body 310 includes a bottom end 311 and a top end 312 disposed opposite to the bottom end 311, the first radio frequency zone 11 is close to the bottom end 311, and the main antenna radiator 210 is fixed on the The bottom end 311 , the diversity antenna radiator 220 is fixed on the top end 312 .

In the circuit board structure, antenna device, and mobile terminal of the embodiments of the present invention, a first radio frequency area close to the main antenna is provided through the first main board, and a feed point of the main antenna is provided in the first radio area, The radio frequency main set module is fixed in the first radio frequency zone, and the radio frequency main set module and the main set antenna feed point are electrically connected in the first radio frequency zone, so that the radio frequency main set module and the The length of the cable between the feed points of the main set antenna is shortened, or the cable is omitted, which reduces the attenuation of the radio frequency signal and improves the performance of the antenna. Since the first main board and the second main board are arranged opposite to each other and are connected through the flexible board, the flexible board is only used for wiring, and there is no need to install components on the flexible board, which can save the length of the flexible board and reduce the number of flexible boards used.

The embodiments of the present invention have been described in detail above, and specific examples have been used in this paper to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only used to help understand the method of the present invention and its core idea; at the same time, for Those skilled in the art will have changes in the specific implementation and scope of application according to the idea of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. A circuit board structure applied to a mobile terminal, the mobile terminal comprising a terminal body, characterized in that the circuit board structure comprises a first main board, a second main board, a radio frequency module and a soft board, and the radio frequency module comprises In the radio frequency main assembly module, the terminal body includes a bottom end and a top set opposite to the bottom end, the first main board is fixed to the bottom end, and the second main board is fixed to the top end, wherein: The first main board is set opposite to the second main board and is connected through the flexible board; the flexible board is only used for wiring, and there is no need to install components on the flexible board; The first main board is provided with a first radio frequency area close to the main antenna, the first radio frequency area is provided with a main antenna feed point, the radio frequency main module is fixed on the first radio frequency area, and electrically connecting the main antenna feed point; Wherein, the radio frequency main set module is composed of a plurality of electronic components, the radio frequency main set module is responsible for feeding radio frequency signals to the main set antenna, and the radio frequency main set module is the radio frequency feed source of the main set antenna The multiple electronic components of the radio frequency main assembly module are scattered and arranged in the first radio frequency area to fully utilize the use area of the first radio frequency area. 2. The circuit board structure according to claim 1, wherein the radio frequency module also includes a radio frequency diversity module, and a diversity antenna feed point is also arranged in the first radio frequency area, and the radio frequency diversity module is fixed on The first radio frequency zone is electrically connected to the diversity antenna feed point. 3. The circuit board structure according to claim 2, wherein the radio frequency module further comprises a radio frequency transceiver chip, and the radio frequency transceiver chip is fixed in the first radio frequency area and is electrically connected to the radio frequency master module and The radio frequency diversity module. 4 . The circuit board structure according to claim 3 , wherein the first radio frequency area is further provided with a network antenna feed point, and the network antenna feed point is electrically connected to the radio frequency transceiver chip. 5. The circuit board structure according to claim 4, wherein the circuit board structure also includes a GPS radio frequency module and/or a wifi radio frequency module, the second main board is provided with a second radio frequency area, and the GPS radio frequency The module and/or wifi radio frequency module is fixed in the second radio frequency area and electrically connected to the network antenna feed point. 6. The circuit board structure according to claim 5, characterized in that, the circuit board structure also includes a baseband, the baseband is fixed in the second radio frequency area, and the baseband is electrically connected to the radio frequency master module and The radio frequency diversity module. 7. The circuit board structure according to any one of claims 2-6, wherein the radio frequency main collection module is electrically connected to the main collection antenna feeding point through the first shrapnel, and the radio frequency diversity module is connected through the first shrapnel The two shrapnels are electrically connected to the diversity antenna feed point. 8. The circuit board structure according to any one of claims 2-6, wherein a wire is arranged in the flexible board, and the wire is used to connect the signal line of the first main board and the second board. The signal line of the motherboard. 9. An antenna device, characterized in that, the antenna device comprises the circuit board structure described in any one of claims 1 to 8, and the antenna device also includes a main antenna radiator and a diversity antenna radiator, the The main antenna radiator and the diversity antenna radiator are electrically connected to the main antenna feed point and the diversity antenna feed point respectively. 10. A mobile terminal, characterized in that the mobile terminal comprises the antenna device according to claim 9, the mobile terminal further comprises a terminal body, the circuit board, the main antenna radiator and the diversity The antenna radiators are all fixed on the terminal body.

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