WO2018219112A1

WO2018219112A1 - Terminal multi-antenna structure and mobile terminal

Info

Publication number: WO2018219112A1
Application number: PCT/CN2018/086315
Authority: WO
Inventors: 黄奂衢; 陈玉稳
Original assignee: 维沃移动通信有限公司
Priority date: 2017-05-31
Filing date: 2018-05-10
Publication date: 2018-12-06
Also published as: CN107275760B; CN107275760A

Abstract

Provided in the present disclosure are a terminal multi-antenna structure and a mobile terminal. The terminal multi-antenna structure comprises: a metal portion, the metal portion being provided thereon with at least one breaking seam, and metal structures at two sides of the breaking seam corresponding to at least one antenna arm, respectively; a protrusion portion of a printed circuit board (PCB) of the terminal, which extends in a direction towards the breaking seam, the protrusion portion being provided thereon with at least one spacer which is used for isolating the antenna arms at both sides of the breaking seam; the spacer is electrically conductive, and the spacer is directly grounded, or the spacer is grounded by means of a preset frequency-selective network.

Description

Terminal multi-antenna structure and mobile terminal

Cross-reference to related applications

Priority is claimed on Japanese Patent Application No. 201710401418.7, filed on Jan. 31,,,,,,,,,

Technical field

The present disclosure relates to the field of electronic technologies, and more particularly, to a terminal multi-antenna structure and a mobile terminal.

Background technique

As shown in FIG. 1 , in a conventional design, a mobile terminal having a high proportion of metal or conductive components, a antenna structure of the mobile terminal often has a slit 100 corresponding to a group (two or more) of the antenna arms 200. If the side of the slit is used as the radiating end of the antenna, the electric field strength is generally strong, so that it is easier to couple to the antenna on the other side of the slit, and the isolation between the multiple antennas is deteriorated.

Summary of the invention

The technical problem to be solved by the present disclosure is to provide an antenna structure and a mobile terminal to solve the problem of poor isolation between multiple antennas of a mobile terminal in the related art.

In a first aspect, a terminal multi-antenna structure is provided, comprising: a metal portion, wherein the metal portion is provided with at least one slit, and the metal structures on both sides of the fracture correspond to at least one antenna arm respectively; a circuit board PCB board extending out of the protruding portion in a direction toward the slit, the protruding portion being provided with at least one spacer for isolating the antenna arms on both sides of the slit, the spacer having conductivity; the spacer directly Grounding, or the spacer is selected to be grounded by a predetermined frequency.

In a second aspect, a mobile terminal is provided, comprising: the terminal multi-antenna structure as described above.

The beneficial effects of the above technical solution of the present disclosure are as follows: The terminal multi-antenna structure of the embodiment of the present disclosure has a metal portion forming an antenna, and the metal portion is provided with at least one broken seam, and the metal structures on both sides of the broken seam respectively correspond to at least An antenna arm; the PCB board of the terminal extends out of the protruding portion in a direction of the slit, and the protruding portion is provided with at least one spacer for isolating the antenna arms on both sides of the slit, the spacer has conductivity; the spacer is directly grounded or passed through Set the frequency to select the network ground. In this way, by adding spacers in the gap between the antennas, the mutual coupling between the multiple antennas on both sides of the fracture is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. The isolation piece selects the network ground through the preset frequency, so that the isolation piece can have different impedance responses to the antennas on both sides of the fracture, thereby improving the isolation between the multiple antennas and improving the degree of freedom of antenna performance debugging. Moreover, the break width of the slit to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. The problem of poor isolation between multiple antennas of a mobile terminal in the related art is solved.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings used in the embodiments or the related art description will be briefly described below. It is obvious that the drawings in the following description are only some implementations of the present disclosure. For example, other drawings may be obtained from those skilled in the art based on these drawings without paying for inventive labor.

1 is a schematic diagram of a multi-antenna structure of a conventional terminal;

2 is another schematic diagram of a multi-antenna structure of the terminal of the present disclosure;

3 is a schematic diagram of another specific implementation of a multi-antenna structure of a terminal according to the present disclosure;

4 is a schematic diagram of another specific implementation of a multi-antenna structure of the terminal of the present disclosure;

FIG. 5 is a schematic diagram of another specific implementation of a multi-antenna structure of the terminal of the present disclosure; FIG.

6 is another schematic diagram of a multi-antenna structure of the terminal of the present disclosure;

7 is a schematic diagram of another specific implementation of a multi-antenna structure of the terminal of the present disclosure;

8 is another schematic diagram of a multi-antenna structure of the terminal of the present disclosure;

9 is a schematic diagram of another specific implementation of a multi-antenna structure of the terminal of the present disclosure;

Figure 10 is an enlarged schematic view of A in Figure 9;

11 is another schematic diagram of a multi-antenna structure of the terminal of the present disclosure;

12 is a schematic diagram of another specific implementation of a multi-antenna structure of a terminal according to the present disclosure;

Figure 13 is an enlarged schematic view of B in Figure 12.

detailed description

The technical solutions in the embodiments of the present disclosure are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present disclosure. It is obvious that the described embodiments are a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without departing from the inventive scope are the scope of the disclosure.

In some embodiments of the present disclosure, as shown in FIGS. 2-13, a terminal multi-antenna structure is provided, including: a metal portion 1 having at least one slit 11 disposed thereon, the slit The metal structures on both sides of the 11 respectively correspond to at least one antenna arm 12; the printed circuit board PCB of the terminal extends in a direction of the slit 11 to protrude from the protruding portion 4, and the protruding portion 4 is provided with two slits 11 for isolating the slit 11 At least one spacer 2 of the side antenna arm 12, the spacer 2 has electrical conductivity; the spacer 2 is directly grounded, or the spacer 2 is grounded through a predetermined frequency selection network 3.

Here, the spacer 2 can be directly grounded to improve the isolation between the multiple antennas on both sides of the slit 11. The spacer 2 can also be grounded through the preset frequency selection network 3, so that the spacer 2 can have different impedance responses to the antennas on both sides of the fracture, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the antenna performance.

At least one spacer 2 for isolating the two side antenna arms 12 may be provided in each of the slits 11 respectively.

Specifically, the metal portion 1 may be an inner metal outline of a metal frame, a metal ring, a metal shell or a non-metallic material. Wherein, when a metal casing is used, a part of the metal casing may be laterally hollowed out, divided into an antenna area and a main ground, the antenna area is used as the metal part 1, and a slit 11 is arranged in the longitudinal direction of the antenna area, and is broken into at least two. Antenna arm 12.

In the terminal multi-antenna structure of the embodiment of the present disclosure, by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the fracture 11 is reduced, the isolation between the multiple antennas is improved, and the optimization is optimized. Antenna performance. The isolation piece 2 is grounded through the preset frequency selection network 3, so that the isolation piece 2 can have different impedance responses to the antennas on both sides of the fracture 11 to improve the isolation between the multiple antennas and improve the degree of freedom of antenna performance debugging. . Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. The problem of poor isolation between multiple antennas of a mobile terminal in the related art is solved.

In some optional embodiments, when the protruding portion 4 is provided with a plurality of the spacers 2, each two adjacent spacers 2 are electrically connected by a predetermined frequency selection network 3.

At this time, the two adjacent spacers 2 are electrically connected through the preset frequency selection network 3, so that the better isolation between the multi-antennas at the same frequency or near the operating frequency is improved, and the same frequency or the operating frequency is improved. The isolation between multiple antennas and the freedom of antenna performance debugging.

In some alternative embodiments, each of the antenna arms 12 is electrically coupled to the spacer 2 closest to the antenna arm 12 by a predetermined frequency selection network 3.

At this time, the predetermined frequency selection network 3 is electrically connected with the different antenna arms 12 on both sides of the slit 11 to realize the frequency division filtering, and the path of the low frequency current is extended by the frequency division filtering (because the required current path and work) The frequency is inversely correlated), which improves the performance of low-frequency functions, such as improving the performance of the 13.56MHz NFC (Near Field Communication) function (but not limited to this), and reduces the impact on other antennas.

In the embodiment of the present disclosure, the spacer 2 is connected to the main ground of the terminal circuit. That is, the spacer 2 can be directly connected to the main ground or connected to the main ground through the preset frequency selection network 3.

The main ground of the terminal circuit generally comprises a printed circuit board PCB board and a large piece of integral metal connected thereto, and forms an induced current with the antenna radiator as a reference ground for the antenna.

Wherein, the main ground is a main ground on a PCB board or a metal middle frame, but is not limited thereto.

As an implementation in some alternative embodiments, referring to FIG. 2, the protruding portion 4 is provided with one of the spacers 2, and the spacer 2 is grounded by a predetermined frequency selection network 3.

Here, the spacer 2 is inserted in the slit 11 between the multiple antennas, and the spacer 2 is grounded through the preset frequency selection network 3, that is, a spacer having frequency selectivity is inserted in the slit 11 between the multiple antennas. 2. At this time, the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the antenna performance.

For example, by designing the network 3 to design different impedance responses to the antennas on both sides of the fracture 11 by the preset frequency selection network 3, the spacer 2 can be close to the short-circuit state on one side of the fracture 11 and close to the open on the other antenna. The state, so that the antenna on both sides of the fracture 11 can have different responses and effects, so there is a higher degree of freedom in antenna performance debugging.

Wherein, based on the deliberate design of different impedance responses on the antennas on both sides of the fracture 11, the position of the spacer 2 can be optimized, that is, the spacer 2 can be disposed in the fracture 11 in a centered manner, or can be disposed in a non-centered manner. Sew 11 to achieve better antenna performance.

In particular, when the spacer 2 presents a short-circuit (ground) state to a side antenna, the spacer 2 can be adjusted to deviate from the side antenna, that is, the antenna that is open to the other side is approached to reduce the short circuit condition. The effect on the performance of the side antenna. Moreover, this method can often reduce the need to increase the breaking width of the slit 11 to ensure the appearance effect and have better antenna performance.

In some optional embodiments, as shown in FIG. 3, the main ground is the main ground 5 of the terminal PCB board, and the protruding portion 4 includes a conductive area 41, and the conductive area 41 is inserted away from one end of the PCB board. Extending into the slit 11, the conductive region 41 and the main ground 5 of the PCB board is an insulating region 42;

The conductive region 41 is provided with a conductive layer, the conductive region 41 serves as the spacer 2, and the conductive layer serves as a conductive portion of the spacer 2;

Pads 7 are respectively disposed on the conductive portion of the spacer 2 and the main ground 5 of the PCB board, and the preset frequency selection network 3 is soldered between the two pads 7 (not shown in FIG. 3) show).

Here, the spacer 2 is grown from the PCB board between the slits, and is integrated with the PCB board. Wherein, a portion of the protruding portion 4 serves as the spacer 2, another portion is the insulating region 42, and the insulating region 42 is a non-conductive substrate region. As the conductive portion of the spacer 2, a conductive layer may be laid on both the upper and lower sides of the protruding portion or even in each inner layer, and then turned on through the via hole via (but is not limited thereto). In addition, the PCB of the protruding portion 4 can also be locally thickened (ie, the shaped plate stack) to enhance the isolation.

A pad 7 is disposed on the conductive portion of the spacer 2 and the main ground 5 of the PCB, and a preset frequency selection network 3 is soldered between the two pads 7, thereby realizing the spacer 2 to pass the preset. The frequency selection network 3 is connected to the main ground 5 of the PCB board, so that the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11 to improve the degree of freedom in debugging the performance of the antenna.

Among them, the spacer 2 can be disposed in the slit 11 in a centered or not centered manner, thereby achieving better antenna performance.

Therein, each antenna arm 12 can be connected to the main ground 5 of the PCB board via a feed source 6. The feed 6 generally refers to a portion where the feed line is connected to the antenna, and the feed line generally refers to a transmission line whose RF front end is connected to the antenna.

Here, as further shown with reference to FIG. 3, the metal portion 1 in which the antenna arm 12 and the slit 11 are disposed may be the top or bottom of the metal middle frame (but is not limited thereto). Two slits 11 may be arranged at the top or bottom of the metal middle frame to break the metal middle frame into three metal structures, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being connected to the main ground 5 of the PCB board by a feed source 6.

At this time, by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the slit 11 is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. Moreover, the spacer 2 can have different impedance responses to the antennas on both sides of the slit 11 to improve the degree of freedom in debugging the performance of the antenna.

In some optional embodiments, the insulating region 42 is formed between the spacer 2 (ie, the conductive region 41) and the PCB board, the width of the insulating region 42 and the width of the spacer 2 the same.

Here, referring to Fig. 3, the protruding portion 4 is a rectangular strip, the conductive portion 41 is in the upper half as the spacer 2, and the insulating portion 42 is in the lower half.

Alternatively, the insulating region 42 is formed between the spacer 2 and the PCB board, and the width of the insulating region 42 gradually increases from a position where the spacer 2 (i.e., the conductive region 41) is connected.

Here, referring to Fig. 4, the insulating region 42 of the protruding portion 4 is structurally reinforced, and the insulating region 42 is widened on the basis of Fig. 3, so that the overall structural strength is enhanced.

Alternatively, the spacer 2 (i.e., the conductive region 41) is formed at one end of the insulating region 42, and the width of the insulating region 42 is larger than the width of the spacer 2.

Here, referring to Fig. 5, the insulating region 42 of the protruding portion 4 is structurally reinforced, and the insulating region 42 is widened on the basis of Fig. 3, so that the overall structural strength is enhanced.

As another alternative implementation manner, as shown in FIG. 6, the protruding portion 4 is provided with two of the spacers 2 (the first spacer 21 and the second spacer 22), and the two isolations The chips 2 are electrically connected to each other through a preset frequency selection network 3 and directly grounded.

Here, by inserting two spacers 2 in the slit 11 between the multiple antennas, and connecting the two spacers 2 through the preset frequency selection network 3 and then grounding, such a design is even at or near the operating frequency. Multiple antennas can also have better isolation, improve the isolation between multiple antennas with the same frequency or working frequency, and improve the freedom of antenna performance debugging.

For example, by designing the network 3 to design different impedance responses to the antennas on both sides of the fracture 11 by the preset frequency selection network 3, the spacer can be close to the short-circuit state on one side of the fracture 11 and close to the open state on the other antenna. Therefore, the antennas on both sides of the fracture 11 can have different responses and influences, so there is a higher degree of freedom in debugging the antenna performance.

Wherein, based on the deliberate design of different impedance responses on the antennas on both sides of the fracture 11, the position optimization of the spacer 2 can be performed, that is, the two spacers 2 as a whole (but not limited thereto) can be disposed in the fracture 11 in a centered manner. It can also be placed in the slit 11 in a non-centered manner to achieve better antenna performance.

In particular, when the spacer 2 presents a short-circuit (ground) state to a side antenna, the two spacers may be adjusted as a whole (but not limited thereto) to deviate from the side antenna, that is, an antenna that presents an open state to the other side. Close to reduce the impact on the performance of the side antenna due to the presence of a short circuit condition. Moreover, this method can often reduce the need to increase the break width of the slit, ensure the appearance effect, and have better antenna performance.

In some optional embodiments, referring to FIG. 7, the main ground is the main ground 5 of the terminal PCB board, and the protruding portion 4 includes a first conductive area 411 and a second conductive area 412, wherein the two conductive areas Do not connect to each other, and the first conductive region 411 is away from the end of the PCB board and the second conductive region 412 is inserted away from the end of the PCB board into the slit 11;

The first conductive region 411 is provided with a first conductive layer 411 as a first spacer 21 in the slit 11 , and the first conductive layer serves as a conductive portion of the first spacer 21 . An insulating region 42 is disposed between the first spacer 21 and the main ground 5 of the PCB; the second conductive region 412 is covered with a second conductive layer, and the second conductive region 412 is used as a slit 11 a second spacer 22, the second conductive layer serves as a conductive portion of the second spacer 22, and the second spacer 22 is electrically connected to the main ground 5 of the PCB board;

Pads 7 are respectively disposed on the conductive portions of the first spacers 21 and the conductive portions of the second spacers 22, and the preset frequency selection network 3 is soldered between the two pads 7 ( Not shown in Figure 7).

Here, the spacer 2 is grown from the PCB board between the slits, and is integrated with the PCB board. The protruding portion 4 is divided into three regions, two conductive regions and one insulating region 42, and the insulating region 42 is a non-conductive substrate region. One of the two conductive regions (the second conductive region 412) is directly connected to the main ground 5 of the PCB board, and the other conductive region (the first conductive region 411) passes through the insulating region 42 between the main ground 5 of the PCB board. Separated, the two conductive regions are also separated by an insulating region 42. The two conductive regions are respectively used as spacers, that is, the first conductive region 411 is the first spacer 21 and the second conductive region 412 is the second spacer 22. The conductive portions of the two spacers may be provided with a conductive layer on the upper and lower sides of the conductive region or even in each inner layer, and then turned on through the via hole via (but are not limited thereto). In addition, the PCB of the protruding portion 4 can also be locally thickened (ie, the shaped plate stack) to enhance the isolation.

The conductive portion of the first spacer 21 and the conductive portion of the second spacer 22 are respectively provided with pads 7, and a preset frequency selection network 3 is soldered between the two pads 7, and the second spacer 22 is soldered. It is connected with the main ground 5 of the PCB board, so that the two isolation sheets are connected through the preset frequency selection network 3, and then connected to the main ground 5 of the PCB board, so that even between multiple antennas of the same frequency or close to the working frequency. It can have better isolation and improve the isolation between multiple antennas with the same frequency or working frequency.

Wherein, the two spacers can be disposed in the slit 11 as a whole (but not limited thereto) in a centered or non-centered manner, thereby achieving better antenna performance.

Wherein, referring to FIG. 7, the metal portion 1 of the antenna arm 12 and the slit 11 may be the top or bottom of the metal middle frame (but is not limited thereto). Two slits 11 may be arranged at the top or bottom of the metal middle frame to break the metal middle frame into three metal structures, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being connected to the main ground 5 of the PCB board by a feed source 6.

At this time, by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the slit 11 is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. Moreover, even multiple antennas with the same frequency or close to the working frequency can have better isolation, improve the isolation between multiple antennas with the same frequency or working frequency, and improve the degree of freedom of antenna performance debugging.

As another alternative implementation manner, as shown in FIG. 8, the protruding portion 4 is provided with one of the spacers 2, and the spacer 2 is grounded through a preset frequency selection network 3, and each of the The antenna arm 12 is electrically connected to the spacer 2 closest to the antenna arm 12 via a predetermined frequency selection network 3.

Here, the spacer 2 is inserted in the slit 11 between the multiple antennas, and the spacer 2 is grounded through the preset frequency selection network 3, that is, a spacer having frequency selectivity is inserted in the slit 11 between the multiple antennas. 2. At this time, the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the antenna performance. And the predetermined frequency selection network 3 is electrically connected with different antenna arms 12 on both sides of the slit 11 to realize frequency division filtering, and the path of the low frequency current is extended by frequency division filtering (because the required current path and the working frequency are Reverse correlation) improves the performance of low-frequency functions, such as (but not limited to) the performance of the 13.56MHz NFC function, and reduces the impact on other antennas. At the same time, the preset frequency selection network 3 of the ground also plays the role of not allowing the low-frequency current path to be directly connected to the ground, so that the low-frequency performance is further improved.

In some optional embodiments, as shown in FIGS. 9 and 10, the above-mentioned main ground is the main ground 5 of the terminal PCB board, and the protruding portion 4 includes a third conductive region 413, a fourth conductive region 414, and a fifth conductive a region 415, wherein the three conductive regions are not connected to each other, and the three conductive regions are separated from the main ground 5 of the PCB board by an insulating region 42; wherein the third conductive region 413 is disposed at the fourth Between the conductive region 414 and the fifth conductive region 415, an end of the third conductive region 413 away from the PCB board is inserted into the slit 11, the fourth conductive region 414 and the fifth The conductive region 415 is electrically connected to the antenna arm 12 on both sides of the fracture 11 through the elastic piece 8 respectively;

The third conductive region 413 is provided with a conductive layer, the third conductive region 413 is used as the spacer 2, and the conductive layer of the third conductive region 413 is used as a conductive portion of the spacer 2;

The conductive portion of the spacer 2, the fourth conductive region 414, the fifth conductive region 415, and the main ground 5 of the PCB board are respectively provided with pads 7; pads on the spacer 2 7 between the pad 7 on the fourth conductive region 414, between the pad 7 on the spacer 2 and the pad 7 on the fifth conductive region 415, and on the spacer 2 The predetermined frequency selection network 3 (not shown in FIGS. 9, 10) is soldered between the pad 7 and the pad 7 on the main ground 5 of the PCB board, respectively.

Here, the spacer 2 is grown from the PCB board between the slits 11 and is integrated with the PCB board. Therein, the protruding portion 4 may include a wider portion below the slit 11 and a narrower portion that is inserted into the slit 11. The wider portion is provided with a conductive region, that is, a fourth conductive region 414 and a fifth conductive region 415, respectively, at two positions close to the antenna arms 12 on both sides. The narrower portion is provided with a conductive region that is inserted into the slit 11, that is, the third conductive region 413. The three conductive regions are separated by an insulating region 42 respectively, and the three conductive regions are also separated from the main ground 5 of the PCB by the insulating region 42, and the insulating region 42 is a non-conductive substrate region. The third conductive region 413 serves as the spacer 2. The conductive portion of the spacer 2 may be provided with a conductive layer on both the upper and lower sides of the conductive region or even in each inner layer, and then turned on through the via hole via (but is not limited thereto). Of course, the fourth conductive region 414 and the fifth conductive region 415 can also be provided by laying a conductive layer and then conducting the conductive portion by via conduction. In addition, the PCB of the protruding portion 4 can also be locally thickened (ie, the shaped plate stack) to enhance the isolation. Wherein, each antenna arm 12 can be connected to the main ground of the PCB board through a feed source. The feed generally refers to the portion where the feed line is connected to the antenna, and the feed line generally refers to the transmission line where the RF front end is connected to the antenna.

The pad 7 is disposed on the conductive portion of the spacer 2, the fourth conductive region 414, the fifth conductive region 415, and the main ground 5 of the PCB. A preset frequency selection is soldered between the pad 7 on the spacer 2 and the pad 7 on the fourth conductive region 414, the pad 7 on the spacer 2, and the pad 7 on the fifth conductive region 415, respectively. The network 3 realizes that the network 3 is electrically connected to different antenna arms 12 on both sides of the slit 11 through the preset frequency selection network, and the path of the low-frequency current can be extended by the frequency division filtering to improve the low-frequency performance. For example, referring to FIG. 9 , assuming that the first feed source 61 is a feed of NFC, the dotted line C in FIG. 9 is the extended NFC current path of the present disclosure, so that it is not limited by the appearance of the fracture. Good user experience. One end of the broken line C is the first feed source 61, and the other end is connected to the main ground 5 of the PCB board by the antenna arm 12 via the elastic piece 8.

The pad 7 on the spacer 2 and the main ground 5 of the PCB are also soldered with a preset frequency selection network 3, so that the spacer 2 is grounded through the preset frequency selection network 3, so that the spacer 2 is broken. The antennas on both sides of the 11 can have different impedance responses to improve the freedom of antenna performance debugging.

Here, as will be continued with reference to Fig. 9, the metal portion 1 in which the antenna arm 12 and the slit 11 are provided may be the top or bottom of the metal middle frame (but is not limited thereto). Two slits 11 may be arranged at the top or bottom of the metal middle frame to break the metal middle frame into three metal structures, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being connected to the main ground of the PCB board by a feed.

At this time, by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the slit 11 is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. Moreover, the low frequency performance is improved, and the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11 to improve the degree of freedom in antenna performance debugging.

As another alternative implementation manner, as shown in FIG. 11, the protruding portion 4 is provided with two of the spacers 2 (the first spacer 21 and the second spacer 22), and the two isolations After the chips 2 are electrically connected through the preset frequency selection network 3, the network 3 is grounded through the preset frequency, and each of the antenna arms 12 and the spacer 2 closest to the antenna arm 12 are preset. The frequency selection network 3 is electrically connected.

Here, by inserting two spacers 2 in the slit 11 between the multiple antennas, and causing the spacer 2 to be grounded through the preset frequency selection network 3, that is, a frequency selective is inserted in the slit 11 between the multiple antennas. The spacer 2, at this time, the spacer 2 can have different impedance responses to the antennas on both sides of the slit 11, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the antenna performance. In particular, the two spacers 2 are connected through a preset frequency selection network 3 and then grounded. This design can provide better isolation even between multiple antennas of the same frequency or near the operating frequency, improving the same frequency or operating frequency. The isolation between multiple antennas is similar, and the degree of freedom in antenna performance debugging is further improved. In particular, the predetermined frequency selection network 3 is electrically connected to different antenna arms 12 on both sides of the slit 11 to realize frequency division filtering, and the path of the low frequency current is extended by frequency division filtering (because the required current path and the operating frequency are Reverse correlation) improves the performance of low-frequency functions, such as (but not limited to) the performance of the 13.56MHz NFC function, and reduces the impact on other antennas. At the same time, the preset frequency selection network 3 of the ground also plays the role of not allowing the low-frequency current path to be directly connected to the ground, so that the low-frequency performance is further improved.

In particular, when the spacer 2 presents a short-circuit (ground) state to a side antenna, the two spacers 2 may be adjusted as a whole (but not limited thereto) to be offset from the side antenna, that is, to be open to the other side. The antennas are close to reduce the effect on the performance of the side antenna due to the presence of a short circuit condition. Moreover, this method can often reduce the need to increase the breaking width of the slit 11 to ensure the appearance effect and have better antenna performance.

In some optional embodiments, referring to FIGS. 12 and 13, the main ground is the main ground 5 of the terminal PCB board, and the protruding portion 4 includes a sixth conductive area 416, a seventh conductive area 417, and an eighth conductive. a region 418 and a ninth conductive region 419, wherein the four conductive regions are not connected to each other, and between the four conductive regions and the main ground 5 of the PCB board are insulating regions 42; wherein the sixth conductive region 416 And the seventh conductive region 417 is disposed between the eighth conductive region 418 and the ninth conductive region 419, the sixth conductive region 416 is away from one end of the PCB board and the seventh conductive region 417 One end away from the PCB board is inserted into the slit 11 , and the eighth conductive area 418 and the ninth conductive area 419 are electrically connected to the antenna arm 12 on both sides of the slit 11 through the elastic piece 8 respectively;

The sixth conductive region 416 is provided with a conductive layer. The sixth conductive region 416 serves as a first spacer 21 in the slit 11 , and the conductive layer of the sixth conductive region 416 serves as the first spacer 21 . a conductive portion; the seventh conductive region 417 is provided with a conductive layer, the seventh conductive region 417 serves as a second spacer 22 in the slit 11, and the conductive layer of the seventh conductive region 417 serves as the second isolation a conductive portion of the sheet 22;

The conductive portion of the first spacer 21, the eighth conductive region 418, the ninth conductive region 419, and the main ground 5 of the PCB board are respectively provided with pads 7, and the second spacer 22 The conductive portion is respectively provided with a pad 7 on the first position 91 and the second position 92, wherein a distance between the first position 91 and the main ground 5 of the PCB board is greater than the second position 92 and The distance between the main ground 5 of the PCB board;

The pad 7 on the first spacer 21 and the pad 7 on the eighth conductive region 418, the pad 7 on the first spacer 21 and the second spacer 22 Between the pads 7 on a location 91, between the pads 7 on the first location 91 of the second spacer 22 and the pads 7 on the ninth conductive region 419, and the second spacer The predetermined frequency selection network 3 (not shown in FIGS. 12, 13) is soldered between the pads 7 on the second location 92 of 22 and the pads 7 on the main ground 5 of the PCB.

Here, the spacer 2 is grown from the PCB board between the slits 11 and is integrated with the PCB board. Therein, the protruding portion 4 may include a wider portion below the slit 11 and a narrower portion that is inserted into the slit 11. The wider portion is provided with a conductive region, that is, an eighth conductive region 418 and a ninth conductive region 419, respectively, at two positions close to the antenna arms 12 on both sides. The narrower portion is provided with two conductive regions that are inserted into the slit 11, that is, the sixth conductive region 416 and the seventh conductive region 417. The four conductive regions are respectively separated by the insulating region 42, and the four conductive regions are also separated from the main ground 5 of the PCB by the insulating region 42, and the insulating region 42 is a non-conductive substrate region. The sixth conductive region 416 and the seventh conductive region 417 are respectively used as spacers, that is, the sixth conductive region 416 is the first spacer 21 and the seventh conductive region 417 is the second spacer 22. The conductive portions of the two spacers may be provided with a conductive layer on both the upper and lower sides of the conductive region or even in each inner layer, and then turned on (but not limited to) through the via holes via. Of course, the eighth conductive region 418 and the ninth conductive region 419 can also be provided by laying a conductive layer and then conducting the conductive portion by via conduction. In addition, the PCB of the protruding portion 4 can also be locally thickened (ie, the shaped plate stack) to enhance the isolation. Wherein, each antenna arm 12 can be connected to the main ground of the PCB board through a feed source. The feed generally refers to the portion where the feed line is connected to the antenna, and the feed line generally refers to the transmission line where the RF front end is connected to the antenna.

The conductive portion of the first spacer 21, the eighth conductive region 418, the ninth conductive region 419, and the main ground 5 of the PCB board are respectively provided with pads 7, and the conductive portion of the second spacer 22 is at the first position 91. Pads 7 are provided on the second position 92, respectively. The pad 7 on the first spacer 21 and the pad 7 on the eighth conductive region 418 are soldered between the pad 7 on the second spacer 22 and the pad 7 on the ninth conductive region 419, respectively. The preset frequency selects the network 3, thereby realizing the electrical connection between the different antenna arms 12 on both sides of the slit 11 through the preset frequency selection network 3, and thereby extending the path of the low frequency current through the frequency division filtering to improve the low frequency performance. For example, referring to FIG. 12, it is assumed that the first feed source 61 is a feed of NFC, and the dotted line D in FIG. 12 is the extended NFC current path of the present disclosure, so that it is not limited by the appearance of the fracture. Good user experience. One end of the broken line D is the first feed source 61, and the other end is connected to the main ground 5 of the PCB board by the antenna arm 12 via the elastic piece 8.

Wherein the pad 7 on the first spacer 21 and the pad 7 on the first position 91 of the second spacer 22, the pad 7 on the second position 92 of the second spacer 22 and the PCB A preset frequency selection network 3 is respectively soldered between the pads 7 on the main ground 5, so that the two isolation sheets are connected through the preset frequency selection network 3, and then the network 3 is grounded through the preset frequency. Even multiple antennas with the same frequency or close to the working frequency can have better isolation, which improves the degree of freedom of antenna performance debugging.

Wherein, the two spacers can be disposed in the slit in a centered or non-centered manner as a whole (but not limited thereto), thereby achieving better antenna performance.

Here, with continued reference to FIG. 12, the metal portion 1 in which the antenna arm 12 and the slit 11 are disposed may be the top or bottom of the metal middle frame (but is not limited thereto). Two slits 11 may be arranged at the top or bottom of the metal middle frame to break the metal middle frame into three metal structures, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being connected to the main ground 5 of the PCB board by a feed.

At this time, by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the slit 11 is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. Moreover, the low frequency performance is improved, and the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11 to improve the degree of freedom in antenna performance debugging. Moreover, even multiple antennas with the same frequency or close to the working frequency can have better isolation, thereby improving the isolation between multiple antennas with the same frequency or working frequency, and further improving the degree of freedom of antenna performance debugging.

Wherein, the preset frequency selection network 3 mentioned herein may be combined by one or more of a capacitor, an inductor, a magnetic bead, a resistor and a filter by series and/or parallel. And the preset frequency selection network 3 is an adjustable frequency selection network or a fixed (ie, non-adjustable) frequency selection network. The specific settings can be made according to actual needs.

The preset frequency selection network 3 may be a network having a specific frequency selection function that meets the requirements obtained by combining the experimental data.

The adjustable frequency selection network is a frequency selective network with adjustable parameters, and the fixed frequency selection network is a frequency selection network with non-adjustable parameters.

Here, as already mentioned above, the spacer 2 can be placed in the slit 11 in a centered or uncentered manner to further optimize the antenna performance. When the plurality of spacers 2 are included in the slit 11, the plurality of spacers 2 may be disposed as a whole in a centered or not centered manner.

In addition, in order to avoid unnecessary resonance and to ensure better isolation, in some alternative embodiments, the length of the grounding path of the spacer 2 is smaller than the length of the shortest antenna arm 12 on both sides of the slit 11.

At this time, unnecessary resonance is avoided and a good isolation effect is ensured.

In addition, in order to ensure a better appearance, in some alternative embodiments, the width of the slit 11 is less than or equal to 100 mm; the total thickness of all the spacers 2 in the slit 11 is less than or equal to 50. Millimeter.

At this time, under the premise of ensuring better isolation, a better appearance effect is ensured.

Further, the cross-sectional area of the spacer 2 may be smaller than the cross-sectional area of the metal structure on both sides of the slit 11 so that the spacer 2 is not covered by the non-metallic material in the slit 11.

In addition, all of the conductive structures described herein, such as the conductive layer and the elastic piece 8, may be made of a metal material (but are not limited thereto).

In summary, the multi-antenna structure of the terminal in the embodiment of the present disclosure utilizes a relatively simple, mature, stable, and low-cost design implementation scheme, which reduces the mutual coupling between multiple antennas on both sides of the fracture 11 and improves the inter-connectivity between the multiple antennas. Isolation optimizes antenna performance. And causing one or more of the above-mentioned spacers 2 to be connected to the ground through an adjustable or fixed frequency selection network, etc., and designing different impedance load environments for the antennas on both sides of the fracture 11 as a pair The spacers 2 for the antennas on both sides of the fracture 11 (especially for multiple antennas with the same frequency or similar operating frequency) are isolated, and the mutual coupling between the multiple antennas on both sides of the fracture 11 is reduced and the isolation is improved, so that the antenna performance is improved. Can be improved. And by further adjusting the position of the spacer 2 in the slit 11, the antenna performance can be optimized again. And through the adjustable or fixed frequency selection network and the antenna arm 12 on both sides of the fracture 11 electrical connection, can achieve better isolation and improve the performance of low frequency (such as NFC). Moreover, the present disclosure may have a greater chance of achieving better multi-antenna performance without significantly increasing the width of the appearance slit 11 and thus maintaining a better overall product competitiveness and user experience. And the spacer of the present disclosure can be produced from a PCB board to increase the strength of the overall structure.

It should be noted that the spirit of the present disclosure is directed to a multi-antenna (not limited to a metal ring and a joint on a metal shell, as long as it is applicable between multiple antennas) via a main ground (eg, a PCB board or a metal middle frame, but not Limit) the insertion of one or more (one or more) of the above-mentioned spacers 2, and the phase selection network and the like by means of (adjustable or fixed) inductors/capacitors/beads or their series/parallel mixing The connection is connected to the ground to serve as the spacer 2 for isolation between the multiple antennas to achieve better overall product competitiveness and user experience. Therefore, the scope of protection includes, but is not limited to, the above-mentioned embodiments and structural shapes therein. Form, size, location and number, etc.

In some embodiments of the present disclosure, there is also provided a mobile terminal comprising: the terminal multi-antenna structure as described in the above embodiments.

The implementation examples of the foregoing terminal multi-antenna structure are applicable to the embodiment of the mobile terminal, and the same technical effects can be achieved.

The mobile terminal of the present disclosure may be, for example, a computer, a tablet computer, a personal digital assistant (PDA), or a vehicle-mounted computer.

In the description of the present disclosure, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", The orientation or positional relationship of the indications "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings. The present disclosure and the simplifications of the disclosure are merely intended to be illustrative, and not to be construed as limiting the scope of the disclosure. In the description of the present disclosure, "a plurality of" means two or more unless otherwise stated.

The above is only the specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the disclosure. It should be covered within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosure should be determined by the scope of the claims.

Claims

A terminal multi-antenna structure includes:

a metal portion, the metal portion is provided with at least one slit, and the metal structures on both sides of the fracture correspond to at least one antenna arm respectively;

a printed circuit board PCB board of the terminal extends out of the protruding portion in a direction of the slit, and the protruding portion is provided with at least one spacer for isolating the antenna arms on both sides of the slit, the spacer having conductivity;

The spacer is directly grounded, or the spacer is grounded by a predetermined frequency selection network.
The terminal multi-antenna structure according to claim 1, wherein when the protruding portion is provided with a plurality of the spacers, each of the two adjacent spacers is electrically connected by a predetermined frequency selection network.
The terminal multi-antenna structure according to claim 1, wherein each of said antenna arms is electrically connected to said spacers closest to said antenna arms by a predetermined frequency selection network.
The terminal multi-antenna structure according to claim 1, wherein the spacer is connected to a main ground of the terminal circuit.
The terminal multi-antenna structure according to claim 4, wherein the protruding portion is provided with one of the spacers, and the spacer is grounded by a predetermined frequency selection network.
The terminal multi-antenna structure according to claim 5, wherein the protruding portion comprises a conductive region, and an end of the conductive region away from the PCB board is inserted into the slit, the conductive region and the PCB The insulation between the main ground of the board;

The conductive region is provided with a conductive layer, the conductive region serves as the spacer, and the conductive layer serves as a conductive portion of the spacer;

Pads are respectively disposed on the conductive portion of the spacer and on the main ground of the PCB, and the preset frequency selection network is soldered between the two pads.
The terminal multi-antenna structure according to claim 6, wherein the insulating region is formed between the spacer and the PCB board, and a width of the insulating region is the same as a width of the spacer; or

The insulating region is formed between the spacer and the PCB board, and a width of the insulating region gradually increases from a position where the spacer is connected; or

The spacer is formed at one end of the insulating region, and the width of the insulating region is greater than a width of the spacer.
The terminal multi-antenna structure according to claim 4, wherein the protruding portion is provided with two of the spacers, and the two of the spacers are directly grounded after being electrically connected by a predetermined frequency selection network.
The terminal multi-antenna structure according to claim 8, wherein the protruding portion comprises a first conductive region and a second conductive region, wherein the two conductive regions are not connected to each other, and the first conductive region is away from the One end of the PCB board and one end of the second conductive area away from the PCB board are inserted into the slit;

The first conductive region is covered with a first conductive layer, the first conductive region serves as a first spacer in the slit, the first conductive layer serves as a conductive portion of the first spacer, and the first conductive layer An insulating region is disposed between the spacer and the main ground of the PCB; the second conductive region is covered with a second conductive layer, and the second conductive region serves as a second spacer in the slit, the second a conductive layer as a conductive portion of the second spacer, and the second spacer is electrically connected to a main ground of the PCB board;

Pads are respectively disposed on the conductive portions of the first spacer and the conductive portions of the second spacer, and the preset frequency selection network is soldered between the two pads.
The terminal multi-antenna structure according to claim 4, wherein said protruding portion is provided with one of said spacers, said spacer being grounded by a predetermined frequency selection network, and said antenna arm and said antenna are separated from said antenna The spacers closest to the arm are electrically connected by a predetermined frequency selection network.
The terminal multi-antenna structure according to claim 10, wherein the protruding portion comprises a third conductive region, a fourth conductive region and a fifth conductive region, wherein the three conductive regions are not connected to each other, and three conductive regions are An insulating region is disposed between the main ground of the PCB board; wherein the third conductive region is disposed between the fourth conductive region and the fifth conductive region, and the third conductive region is away from the PCB One end of the plate is inserted into the slit, and the fourth conductive region and the fifth conductive region are respectively electrically connected to the antenna arms on both sides of the fracture through the elastic piece;

The third conductive region is provided with a conductive layer, the third conductive region serves as the spacer, and the conductive layer of the third conductive region serves as a conductive portion of the spacer;

Pads are respectively disposed on the conductive portion of the spacer, the fourth conductive region, the fifth conductive region, and the main ground of the PCB; the pads on the spacer and the fourth conductive region Between the pads, between the pads on the spacer and the pads on the fifth conductive region, and between the pads on the spacer and the pads on the main ground of the PCB The preset frequency selects a network.
The terminal multi-antenna structure according to claim 4, wherein the protruding portion is provided with two of the spacers, and the two of the spacers are electrically connected through a preset frequency selection network and then pass the preset frequency. A network ground is selected, and each of the antenna arms is electrically connected to the spacer closest to the antenna arm by a predetermined frequency selection network.
The terminal multi-antenna structure according to claim 12, wherein the protruding portion comprises a sixth conductive region, a seventh conductive region, an eighth conductive region and a ninth conductive region, wherein the four conductive regions are not connected to each other, And an insulating region between the four conductive regions and the main ground of the PCB board; wherein the sixth conductive region and the seventh conductive region are disposed in the eighth conductive region and the ninth conductive region Intersecting the sixth conductive region away from the end of the PCB board and the end of the seventh conductive region away from the PCB board into the slit, the eighth conductive region and the ninth conductive The antenna arms of the two sides of the fracture are respectively electrically connected by the elastic piece;

The sixth conductive region is provided with a conductive layer, the sixth conductive region serves as a first spacer in the slit, and the conductive layer of the sixth conductive region serves as a conductive portion of the first spacer; The seventh conductive region is provided with a conductive layer, the seventh conductive region serves as a second spacer in the slit, and the conductive layer of the seventh conductive region serves as a conductive portion of the second spacer;

The conductive portion of the first spacer, the eighth conductive region, the nin conductive region, and the main ground of the PCB board are respectively provided with pads, and the conductive portion of the second spacer is in the first position And a pad is disposed on the second position, wherein a distance between the first position and a main ground of the PCB board is greater than a distance between the second position and a main ground of the PCB board;

Between a pad on the first spacer and a pad on the eighth conductive region, between a pad on the first spacer and a pad on a first position of the second spacer, a pad on a first position of the second spacer and a pad on the ninth conductive region and a pad on a second position of the second spacer and a main ground of the PCB The preset frequency selection network is soldered between the pads.
The terminal multi-antenna structure according to any one of claims 1 to 13, wherein the preset frequency selection network is composed of one or more of a capacitor, an inductor, a magnetic bead, a resistor and a filter, and is connected in series and / Or a combination of parallel ways.
The terminal multi-antenna structure according to any one of claims 1 to 13, wherein the preset frequency selection network is an adjustable frequency selection network or a fixed frequency selection network.
The terminal multi-antenna structure according to any one of claims 1 to 13, wherein the metal portion is an inner metal outline of a metal frame, a metal ring, a metal case or a non-metal material.
The terminal multi-antenna structure according to any one of claims 1 to 13, wherein the length of the spacer ground path is smaller than the length of the shortest antenna arm on both sides of the slit.
The terminal multi-antenna structure according to any one of claims 1 to 13, wherein the width of the slit is less than or equal to 100 mm; the total thickness of all the spacers in the slit is less than or equal to 50 mm.
A mobile terminal comprising: the terminal multi-antenna structure according to any one of claims 1-18.