Mobile terminal

Abstract

The invention provides a mobile terminal which comprises a main board and an antenna board, and the main board and the antenna board are arranged in a spaced mode. The tuner is arranged on the main board; the antenna radiator is arranged on the antenna plate; and the first radio frequency line is provided with a first end and a second end, the first end is electrically connected with the tuner, and the second end is electrically connected with the antenna radiator. The mobile terminal can reduce the number of bridging lines between circuit boards.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology, and in particular to a mobile terminal. Background Art

[0002] At present, in the antenna design of mobile terminals, tuners are often used. The tuner and the antenna radiator are often set together on an antenna board, but the tuner on the antenna board needs to be connected to the power supply and control chip on the mainboard, which results in the need to jumper multiple lines between the mainboard and the antenna board.

[0003] The connection of the lines requires the setting of connectors (pins) on the main board and the antenna board respectively. Multiple connectors not only occupy a large amount of space on the main board and the antenna board, but also increase the cost. Summary of the invention

[0004] An embodiment of the present application provides a mobile terminal that can reduce the number of jumper lines between circuit boards.

[0005] An embodiment of the present application provides a mobile terminal, including:

[0006] A main board and an antenna board, wherein the main board and the antenna board are spaced apart from each other;

[0007] A tuner, wherein the tuner is arranged on the main board;

[0008] An antenna radiator, wherein the antenna radiator is disposed on the antenna board;

[0009] A first radio frequency line has a first end and a second end, the first end is electrically connected to the tuner, and the second end is electrically connected to the antenna radiator.

[0010] In some embodiments, the first radio frequency line includes a first core and a first shielding layer, the first shielding layer is coated on the outside of the first core, the first core is electrically connected to the tuner and the antenna radiator respectively, and the first shielding layer is grounded.

[0011] In some embodiments, the mobile terminal further includes a first cable holder, the first cable holder is disposed on the mainboard, the first cable holder is electrically connected to the tuner, and the first end of the first radio frequency line is electrically connected to the first cable holder.

[0012] In some embodiments, the mobile terminal further includes a second cable holder, the second cable holder is disposed on the antenna board, the second cable holder is electrically connected to the tuner, and the second end of the first radio frequency line is electrically connected to the second cable holder.

[0013] In some embodiments, the mobile terminal further includes a radio frequency chip, the radio frequency chip is disposed on the mainboard, and the radio frequency chip is electrically connected to the antenna radiator.

[0014] In some embodiments, the radio frequency chip is connected to the first cable holder.

[0015] In some embodiments, the mobile terminal further includes a second radio frequency line, the second radio frequency line having a third end and a fourth end, the third end is electrically connected to the radio frequency chip, and the fourth end is electrically connected to the antenna radiator.

[0016] In some embodiments, the second RF line includes a second core and a second shielding layer, the second shielding layer is coated on the outside of the second core, the second core is electrically connected to the tuner and the antenna radiator respectively, and the second shielding layer is grounded.

[0017] In some embodiments, the antenna board is a flexible circuit board.

[0018] In some embodiments, the mobile terminal further includes a matching network, and the matching network is electrically connected to the tuner and the antenna radiator respectively.

[0019] The mobile terminal provided in an embodiment of the present application comprises a mainboard and an antenna board which are spaced apart from each other, and the mainboard and the antenna board are spaced apart from each other. The tuner is arranged on the mainboard, and the antenna radiator is arranged on the antenna board. The first radio frequency line has a first end and a second end, the first end is electrically connected to the tuner, and the second end is electrically connected to the antenna radiator. It can be understood that the tuner and the antenna radiator are arranged separately, and a power supply and a control chip are arranged on the mainboard, so that the problem of an increase in lines caused by the need to connect the tuner to the power supply and the control chip is solved, and it is only necessary to use the first radio frequency line to connect the tuner and the antenna radiator respectively, so that the impedance matching of the antenna radiator can be achieved, which is beneficial to improving the antenna efficiency and expanding the antenna bandwidth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0021] Figure 1 A first structural diagram of a mobile terminal provided in an embodiment of the present application.

[0022] Figure 2 A second structural diagram of a mobile terminal provided in an embodiment of the present application.

[0023] Figure 3 A third structural schematic diagram of the mobile terminal provided in an embodiment of the present application.

[0024] Figure 4 A fourth structural schematic diagram of the mobile terminal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0026] An embodiment of the present application provides a mobile terminal, which can reduce the number of jumper lines between circuit boards, and is described below with reference to the accompanying drawings.

[0027] Embodiment 1

[0028] See also Figure 1 , Figure 1 A first structural diagram of a mobile terminal provided in an embodiment of the present application.

[0029] The mobile terminal 100 provided in the embodiment of the present application includes a main board 10 and an antenna board 20, and the main board 10 and the antenna board 20 are arranged at intervals. The tuner 30 is arranged on the main board 10, and the antenna radiator 21 is arranged on the antenna board 20. The first radio frequency line 61 has a first end and a second end, the first end is electrically connected to the tuner 30, and the second end is electrically connected to the antenna radiator 21.

[0030] The mobile terminal 100 may be a mobile phone.

[0031] The main board 10 and the antenna board 20 are separately and independently arranged circuit boards.

[0032] The tuner 30 may include a single-pole multi-throw switch 31 and a plurality of matching devices 32. The single-pole multi-throw switch 31 may be an SP4T switch. The single-pole multi-throw switch 31 includes a moving end and a plurality of fixed ends. The moving end may be selectively connected to one of the fixed ends. The moving end is connected to the first end of the first radio frequency. The plurality of fixed ends are connected to a plurality of matching devices 32 in a one-to-one correspondence. One end of each matching device 32 is connected to the fixed end of the single-pole multi-throw switch 31, and the other end is grounded. The tuner 30 can switch on different antenna matching when the mobile terminal 100 operates in different frequency bands, thereby enabling the antenna to use appropriate antenna matching in different frequency bands, thereby improving antenna efficiency and expanding antenna bandwidth.

[0033] The mainboard 10 is provided with a power supply 40, which is connected to the tuner 30 to supply power to the tuner 30. The mainboard 10 is also provided with a control chip 51, which is connected to the tuner 30 to control the tuner 30.

[0034] The first radio frequency line 61 may be a 50 ohm impedance line.

[0035] The first RF line 61 includes a first core 611 and a first shielding layer 612, and the first shielding layer 612 is coated on the outside of the first core 611. The first core 611 is electrically connected to the tuner 30 and the antenna radiator 21, respectively, and the first shielding layer 612 is grounded. The first shielding layer 612 can reduce the influence of the first RF line 61 on the tuner 30, so that the tuner 30 can play a better role, which is conducive to the realization of the antenna performance of the mobile terminal 100.

[0036] The mobile terminal 100 includes a first cable holder 71, which is disposed on the mainboard 10, and is electrically connected to the tuner 30, and a first end of the first radio frequency line 61 is electrically connected to the first cable holder 71. It is understood that a reliable electrical connection between the first radio frequency line 61 and the mainboard 10 can be achieved through the first cable holder 71.

[0037] The mobile terminal 100 includes a second cable seat 72, which is disposed on the antenna board 20, the second cable seat 72 is electrically connected to the antenna radiator 21, and the second end of the first radio frequency line 61 is electrically connected to the second cable seat 72. It can be understood that the second cable seat 72 can realize a reliable electrical connection between the first radio frequency line 61 and the antenna board 20.

[0038] The mobile terminal 100 may further include a plurality of matching networks, which are electrically connected to the tuner 30 and the antenna radiator 21, respectively. The function of the matching network is to adjust the offset of the matching device 32 introduced by the first RF line 61, and improve the accuracy of the tuner 30 in adjusting the matching device 32. There may be a plurality of matching networks, which may be arranged on the main board 10 or on the antenna board 20.

[0039] See also Figures 2 to 4 , Figure 2 A second structural diagram of a mobile terminal provided in an embodiment of the present application, Figure 3 A third structural diagram of a mobile terminal provided in an embodiment of the present application is shown. Figure 4The fourth structural diagram of the mobile terminal provided in the embodiment of the present application. The mobile terminal 100 also includes a radio frequency chip 52, which is disposed on the mainboard 10 and is electrically connected to the antenna radiator 21. The radio frequency chip 52 is used to transmit a radio frequency signal to the antenna radiator 21, and the antenna radiator 21 radiates the radio frequency signal after receiving the radio frequency signal.

[0040] Embodiment 2

[0041] Please continue reading Figure 2 In the embodiment of the present application, the first connection method between the RF chip 52, the tuner 30 and the antenna radiator 21 is mainly described.

[0042] The radio frequency chip 52 is connected to the first cable holder 71 on the mainboard 10. Specifically, the radio frequency chip 52 can be connected to the first cable holder 71 through a feeder on the mainboard 10.

[0043] That is to say, the first cable seat 71 is not only connected to the tuner 30 on the mainboard 10, but also connected to the RF chip 52 on the mainboard 10. In the embodiment of the present application, there is only one line between the mainboard 10 and the antenna board 20, which is the first RF line 61. It can be understood that in the embodiment of the present application, the number of lines is small, and the tuning function is realized without adding lines such as power supply and control for the tuner 30.

[0044] The antenna board 20 may also be provided with a first spring piece 91 , which is electrically connected to the second cable seat 72 and is also connected to the antenna radiator 21 .

[0045] The multiple matching networks also include a first matching network 81 and a second matching network 82. The first matching network 81 is disposed on the mainboard 10 and is respectively connected to the RF chip 52, the tuner 30, and the first cable holder 71. The first matching network 81 is in a series-parallel-series mode, and together with the tuner 30, forms a double L-type matching network, i.e., a series-parallel-series-parallel mode.

[0046] The second matching network 82 is disposed on the antenna board 20, and is respectively connected to the second cable holder 72 and the antenna radiator 21. The second matching network 82 is a double L-type matching network, i.e., a series-parallel-series-parallel mode. Further, the second matching network 82 can be respectively connected to the second cable holder 72 and the first spring 91.

[0047] Embodiment 3

[0048] Please continue reading Figure 3 In the embodiment of the present application, the second connection method between the RF chip 52, the tuner 30 and the antenna radiator 21 is mainly described.

[0049] In this embodiment, the mobile terminal 100 further includes a second radio frequency line 62 . The second radio frequency line 62 has a third end and a fourth end. The third end is electrically connected to the radio frequency chip 52 , and the fourth end is electrically connected to the antenna radiator 21 .

[0050] The second RF line 62 includes a second core 621 and a second shielding layer 622. The second shielding layer 622 is wrapped around the outside of the second core 621. The second core 621 is electrically connected to the RF chip 52 and the antenna radiator 21, respectively. The second shielding layer 622 is grounded. It can be understood that the first shielding layer 612 is grounded, the second shielding layer 622 is grounded, and the first shielding layer 612 and the second shielding layer 622 can be connected in series through a microstrip line on the main board 10 and / or the antenna board 20. Similarly, the second shielding layer 622 can reduce the influence of the second RF line 62 on the tuner 30 and the RF chip 52, so that the tuner 30 and the RF chip 52 can play a better role, which is conducive to the realization of the antenna performance of the mobile terminal 100.

[0051] The mobile terminal 100 further includes a third cable seat 73 and a fourth cable seat 74. The third cable seat 73 is arranged on the mainboard 10, the third cable seat 73 is electrically connected to the RF chip 52, and the first end of the second RF line 62 is electrically connected to the third cable seat 73. It can be understood that the third cable seat 73 can realize a reliable electrical connection between the second RF line 62 and the mainboard 10. The fourth cable seat 74 is arranged on the antenna board 20, the fourth cable seat 74 is electrically connected to the antenna radiator 21, and the second end of the second RF line 62 is electrically connected to the fourth cable seat 74. It can be understood that the fourth cable seat 74 can realize a reliable electrical connection between the second RF line 62 and the antenna board 20.

[0052] The mobile terminal 100 further includes a second spring clip 92 and a third spring clip 93, wherein the second spring clip 92 and the third spring clip 93 are arranged on the antenna board 20. The second spring clip 92 is electrically connected to the second cable seat 72, and the second spring clip 92 is also connected to the antenna radiator 21. The third spring clip 93 is electrically connected to the fourth cable seat 74, and the third spring clip 93 is also connected to the antenna radiator 21.

[0053] The antenna radiator 21 may include multiple branches, wherein the branch supporting low frequency may be a loop antenna, the starting end of the loop antenna may be a third spring piece 93, and the end of the loop antenna may be a second spring piece 92. The shape of the loop antenna is a long straight line with a length of 30 to 40 mm and a width of 2 to 3 mm. The other branches of the antenna radiator 21 may be used to achieve antenna performance in medium and high frequency bands. Usually, only the low frequency band needs to use the tuning function of the tuner 30, so the embodiment of the present application does not make too many restrictions on the other branches of the antenna radiator 21.

[0054] The multiple matching networks also include a third matching network 83, a fourth matching network 84 and a fifth matching network 85. The third matching network 83 is arranged on the main board 10, and the third matching network 83 is respectively connected to the first cable holder 71 and the tuner 30. The third matching network 83 is generally an L-type matching network, that is, a series-parallel-series-parallel mode. The fourth matching network 84 and the fifth matching network 85 are arranged on the antenna board 20, and the fourth matching network 84 is respectively connected to the second cable holder 72 and the antenna radiator 21, and the fourth matching network 84 is an L-type matching network, that is, a series-parallel-series-parallel mode. The fifth matching network 85 is respectively connected to the fourth cable holder 74 and the antenna radiator 21, and the fifth matching network 85 is a double L-type matching network, that is, a series-parallel-series-parallel mode.

[0055] Further, the fourth matching network 84 can be connected to the second cable holder 72 and the second elastic piece 92 respectively. The fifth matching network 85 can be connected to the fourth cable holder 74 and the third elastic piece 93 respectively.

[0056] Please continue reading Figure 4 In some cases, the antenna board 20 is a flexible printed circuit (FPC).

[0057] Among them, the first RF line 61 and the second RF line 62 can be directly soldered on the flexible circuit board through the pad. The mobile terminal 100 includes a first pad and a second pad, the first pad and the second pad are arranged on the antenna board 20, the first pad is connected to the first wire core 611 of the first RF line 61, the first pad is also connected to the antenna radiator 21, the second pad is connected to the second wire core 621 of the second RF line 62, and the second pad is also connected to the antenna radiator 21. The distance between the first pad and the second pad is 30 to 40 mm.

[0058] Among them, the mobile terminal 100 includes a third solder pad and a fourth solder pad, the third solder pad and the fourth solder pad are arranged on the antenna board 20, the third solder pad is connected to the first shielding layer 612 of the first radio frequency line 61, and the fourth solder pad is connected to the second shielding layer 622 of the second radio frequency line 62. The third solder pad and the fourth solder pad can be connected through a trace on the antenna board 20, and the width of the trace is 1 to 1.5 mm.

[0059] The mobile terminal 100 provided in the embodiment of the present application includes a mainboard 10 and an antenna board 20 which are arranged at intervals. The mainboard 10 and the antenna board 20 are arranged at intervals. The tuner 30 is arranged on the mainboard 10, and the antenna radiator 21 is arranged on the antenna board 20. The first radio frequency line 61 has a first end and a second end, the first end is electrically connected to the tuner 30, and the second end is electrically connected to the antenna radiator 21. It can be understood that the tuner 30 and the antenna radiator 21 are arranged separately, and the power supply 40 and the control chip 51 are arranged on the mainboard 10, so that the problem of increased lines caused by the need to connect the tuner 30 to the power supply 40 and the control chip 51 is solved, and it is only necessary to use the first radio frequency line 61 to connect the tuner 30 and the antenna radiator 21 respectively, so that the matching device 32 of the antenna radiator 21 can be matched, which is conducive to improving the antenna efficiency and expanding the antenna bandwidth.

[0060] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0061] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0062] The mobile terminal provided by the embodiment of the present application is described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A mobile terminal, characterized in that: include: A main board and an antenna board, wherein the main board and the antenna board are spaced apart from each other; A tuner, wherein the tuner is arranged on the main board; An antenna radiator, the antenna radiator being arranged on the antenna board; A first radio frequency line has a first end and a second end, the first end is electrically connected to the tuner, and the second end is electrically connected to the antenna radiator.

2. The mobile terminal according to claim 1, characterized in that: The first radio frequency line includes a first core and a first shielding layer, the first shielding layer is coated on the outside of the first core, the first core is electrically connected to the tuner and the antenna radiator respectively, and the first shielding layer is grounded.

3. The mobile terminal according to claim 2, characterized in that: It also includes a first cable seat, which is arranged on the mainboard, the first cable seat is electrically connected to the tuner, and the first end of the first radio frequency line is electrically connected to the first cable seat.

4. The mobile terminal according to claim 3, characterized in that: It also includes a second cable seat, which is arranged on the antenna board, the second cable seat is electrically connected to the tuner, and the second end of the first radio frequency line is electrically connected to the second cable seat.

5. The mobile terminal according to any one of claims 1 to 4, characterized in that: It also includes a radio frequency chip, which is arranged on the mainboard and is electrically connected to the antenna radiator.

6. The mobile terminal according to claim 5, characterized in that: The radio frequency chip is connected to the first cable seat.

7. The mobile terminal according to claim 5, characterized in that: It also includes a second radio frequency line, wherein the second radio frequency line has a third end and a fourth end, the third end is electrically connected to the radio frequency chip, and the fourth end is electrically connected to the antenna radiator.

8. The mobile terminal according to claim 7, characterized in that: The second radio frequency line includes a second core and a second shielding layer, the second shielding layer is coated on the outside of the second core, the second core is electrically connected to the tuner and the antenna radiator respectively, and the second shielding layer is grounded.

9. The mobile terminal according to any one of claims 1 to 4, characterized in that: The antenna board is a flexible circuit board.

10. The mobile terminal according to any one of claims 1 to 4, characterized in that: It also includes a matching network, which is electrically connected to the tuner and the antenna radiator respectively.

Images