WO2018219113A1

WO2018219113A1 - Terminal multi-antenna structure and mobile terminal

Info

Publication number: WO2018219113A1
Application number: PCT/CN2018/086320
Authority: WO
Inventors: 陈玉稳; 黄奂衢
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: CN107257016A

Abstract

The invention provides a terminal multi-antenna structure and a mobile terminal. The terminal multi-antenna structure comprises a metal part that is provided with at least one break joint, the metal structures on the two sides of the break joint being respectively corresponding to at least one antenna arm; and at least one isolation plate that is disposed in the break joint, the isolation plate being electrically conductive. Each antenna arm and the isolation plate closest to the antenna arm are electrically connected through a preset frequency selection network, and at least one isolation plate in the break joint is grounded through the preset frequency selection network.

Description

Terminal multi-antenna structure and mobile terminal

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. JP-A No. No. No. No. No. No. No. No. No. No.

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. Therefore, on both sides of the fracture, the end is used as the end opening for antenna radiation, and the other side is often grounded to avoid strong electrical coupling and magnetic coupling between the two antennas. However, this technique tends to limit the design of each antenna. The degree of freedom can even affect antenna performance.

In addition, it is also a common technique to directly reduce the gap width of the slit to reduce mutual coupling between the antennas, but this method will affect the design of the product appearance and reduce the overall competitiveness and attractiveness of the product.

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 difference in isolation between multiple antennas of a mobile terminal in the related art, which limits the degree of freedom in antenna design and antenna performance, and affects the design of the product. The problem.

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; the fracture Provided therein is at least one spacer for isolating the antenna arms on both sides, the spacer being electrically conductive; wherein each of the antenna arms and the spacer closest to the antenna arm selects a network by a preset frequency Electrically connected, and at least one of the spacers is grounded by a predetermined frequency selection network.

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; at least one spacer for isolating the antenna arms on both sides is provided in the fracture, the spacer is electrically conductive; wherein each antenna arm and the spacer closest to the antenna arm are selected by a preset frequency to select a network power Connected, and at least one of the spacers is selected to be grounded by a predetermined frequency. 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. And through the preset frequency selection network to electrically connect with different antenna arms on both sides of the fracture, extending the path of the low-frequency current, improving the performance of the low-frequency function. 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 invention solves the problem of poor isolation between multiple antennas of the mobile terminal in the related art, and limits the degree of freedom in antenna design and antenna performance, and the design of the product is affected.

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

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

4 is another schematic diagram 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;

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

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. 2-7, a terminal multi-antenna structure is provided, comprising: a metal portion 1 having at least one slit 11 disposed thereon, the fracture The metal structures on both sides of the 11 respectively correspond to at least one antenna arm 12; the slit 11 is provided with at least one spacer 2 for isolating the two antenna arms 12, and the spacer 2 has electrical conductivity; The antenna arm 12 is electrically connected to the spacer 2 closest to the antenna arm 12 through a preset frequency selection network 3, and at least one of the spacers 2 is selected by a preset frequency selection network. 3 grounded.

Here, the spacer 2 is 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 slit, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the performance of the antenna. . 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 improving the performance of the 13.56MHz NFC (Near Field Communication) function (but not limited to this), and reduces the impact on other antennas.

Wherein, the spacer 2 is a separate structure inserted in the slit, and the spacer 2 can be made of a metal material (but is not limited thereto).

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 part 1 can be an inner metal outline of a metal frame, a metal ring, a metal shell or a non-metal material, or a multi-antenna structure in a non-metallic shape and a contour. 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. . And through the preset frequency selection network 3 and the different antenna arms on both sides of the slit 11 to electrically connect, extending the path of the low frequency current, improving the performance of the low frequency function. 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 invention solves the problem of poor isolation between multiple antennas of the mobile terminal in the related art, and limits the degree of freedom in antenna design and antenna performance, and the design of the product is affected.

In some optional embodiments, when a plurality of the spacers 2 are disposed in the slit 11, 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.

As an alternative implementation manner, as shown in FIG. 2 and FIG. 3, the spacer 11 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 chassis 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.

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.

Each of the antenna arms 12 can be connected to the ground through a feed source. The feed source generally refers to a portion where the feed line is connected to the antenna. The feed line generally refers to a transmission line whose RF front end is connected to the antenna.

In some alternative embodiments, referring 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 grounded through a feed.

Wherein, the slit 11 is provided with a spacer 2, and the spacer 2 is a separate structure inserted in the slit 11. The spacer 2 is grounded by the preset frequency selection network 3, and the antenna arm 12 on both sides of the slit 11 and the spacer 2 closest to the antenna arm 12 are electrically connected by a preset frequency selection network 3. The preset frequency selection network 3 and the feed are disposed between the metal middle frame and the main ground 4 of the terminal circuit.

At this time, the spacer 2 is 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 slit 11 to improve the degree of freedom in antenna performance debugging. And the predetermined frequency selection network 3 is electrically connected with different antenna arms 12 on both sides of the fracture 11 to realize frequency division filtering, and the frequency division filter can extend the path of the low frequency current to improve the low frequency performance. For example, referring to FIG. 3, it is assumed that the first feed source 51 is a feed of NFC, and the broken line A in FIG. 3 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 A is the first feed source 51, and the other end is grounded by the antenna arm 12.

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

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 an alternative implementation manner, as shown in FIGS. 4 and 5, two slits 2 (a first spacer 21 and a second spacer 22) are disposed in the slit 11 and two The isolation sheets 2 are electrically connected to each other through the preset frequency selection network 3, and then grounded through the preset frequency selection network 3, and each of the antenna arms 12 passes through the spacer 2 closest to the antenna arm 12. The preset frequency selects the network 3 electrical connection.

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. Such a design is even between multiple antennas of the same frequency or close to the operating frequency (the isolation between the same frequency or the operating frequency is often the worst, That is, the mutual coupling is the strongest, and it is often the least difficult to decouple, so the antenna performance is often the biggest. It also has better isolation, improves the isolation between multiple antennas with the same frequency or working frequency, and further improves the isolation. The freedom of antenna performance debugging. 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.

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 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 alternative embodiments, referring to FIG. 5, 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 grounded through a feed.

Therein, two spacers 2 (a first spacer 21 and a third spacer 22) are disposed in the slit 11, and the two spacers 2 are independent structures inserted in the slit 11. The two spacers 2 are electrically connected to each other through the preset frequency selection network 3, and then the network 3 is grounded through the preset frequency. The antenna arm 12 on both sides of the slit 11 and the spacer 2 closest to the antenna arm 12 are electrically connected by a predetermined frequency selection network 3. The preset frequency selection network 3 and the feed are disposed between the metal middle frame and the main ground 4 of the terminal circuit.

At this time, after the two isolation sheets 2 are electrically connected through the preset frequency selection network 3, the network 3 is grounded through the preset frequency, so that even multiple antennas with the same frequency or close to the working frequency can be better. Isolation improves the freedom of antenna performance debugging. And the predetermined frequency selection network 3 is electrically connected with different antenna arms 12 on both sides of the fracture 11 to realize frequency division filtering, and the frequency division filter can extend the path of the low frequency current to improve the low frequency performance. For example, referring to FIG. 5, it is assumed that the first feed source 51 is a feed of NFC, and the broken line B in FIG. 5 is the extended NFC current path of the present disclosure, so that it can be free from the limitation of the appearance of the fracture. Good user experience. One end of the broken line B is the first feed source 51, and the other end is grounded by the antenna arm 12.

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.

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, improve the isolation between multiple antennas with the same frequency or working frequency, and further improve the freedom of antenna performance debugging.

As another alternative implementation manner, as shown in FIGS. 6 and 7, three of the spacers 2 (the first spacer 21, the second spacer 22, and the third spacer 23 are disposed in the slit 11 After each two adjacent spacers 2 are electrically connected by a predetermined frequency selection network 3, one of the spacers 2 is grounded through a preset frequency selection network 3, and each of the antenna arms 12 is electrically connected to the spacer 2 closest to the antenna arm 12 by a predetermined frequency selection network 3.

In some optional embodiments, after each two adjacent spacers 2 are electrically connected through the preset frequency selection network 3, a spacer 2 located in the middle is grounded through the preset frequency selection network 3.

Here, by inserting three 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, each two adjacent spacers 2 are connected through a preset frequency selection network 3, such that the design is even between multiple antennas of the same frequency or close to the operating frequency (the isolation between the same frequency or near the operating frequency is often the worst). That is, the mutual coupling is the strongest, and the most difficult to decouple, so the antenna performance is often the biggest. It can also have better isolation, improve the isolation between multiple antennas with the same frequency or working frequency, and further improve The degree of freedom in antenna performance debugging. Moreover, the design has a higher degree of freedom in designing the insertion of one or two spacers 22 than the slit 11 in the design, so that there is a better chance of achieving better decoupling performance and better antenna performance. 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.

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 three 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 three spacers 2 may be adjusted as a whole (but not limited thereto) to deviate from the side antenna, that is, to present an open state 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 alternative embodiments, referring to FIG. 7, 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 grounded through a feed.

Therein, three spacers 2 (a first spacer 21, a second spacer 22 and a third spacer 23) are disposed in the slit 11, and the three spacers 2 are independent structures inserted in the slit 11. After each two spacers 2 are electrically connected through the preset frequency selection network 3, the spacers 2 located in the middle are grounded through the preset frequency selection network 3. The antenna arm 12 on both sides of the slit 11 and the spacer 2 closest to the antenna arm 12 are electrically connected by a predetermined frequency selection network 3. The preset frequency selection network 3 and the feed are disposed between the metal middle frame and the main ground 4 of the terminal circuit.

At this time, after each of the two spacers 2 is electrically connected through the preset frequency selection network 3, the spacer 2 located in the middle is grounded through the preset frequency selection network 3, so that even the same frequency or Multiple antennas close to the operating frequency can also have better isolation, which improves the freedom of antenna performance debugging. And the predetermined frequency selection network 3 is electrically connected with different antenna arms 12 on both sides of the fracture 11 to realize frequency division filtering, and the frequency division filter can extend the path of the low frequency current to improve the low frequency performance. For example, referring to FIG. 7 , it is assumed that the first feed source 51 is a feed of NFC, and the broken line C in FIG. 7 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 51, and the other end is grounded by the antenna arm 12.

Among them, the three spacers can be disposed in the slit in a centered or uncentered manner as a whole (but not limited to) to achieve better antenna performance.

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 spacers, 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 break 11 and thus maintaining a better overall product competitiveness and user experience.

It should be noted that the spirit of the present disclosure is directed to multiple antennas (not limited to the metal ring and the broken joint on the metal shell, as long as it is applicable between multiple antennas, that is, it can also be used for the non-metallic material shape and the multi-antenna structure in the contour. Inserting one or more (more than one) of the above-mentioned spacers 2, and selecting the frequency by (adjustable or fixed) inductor/capacitor/bead/resistor/filter or its series/parallel mixing The network is connected to the ground and connected to the ground as a spacer 2 for isolation between 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 the above. Structure shape, form, size, position and number, etc. In addition, based on the basic thinking spirit of the present disclosure, similar frequency selection network applications can also be performed at the antenna feed to further improve isolation and reduce mutual coupling to achieve better antenna performance and user experience. This is the scope covered by this patent protection.

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;

At least one spacer for isolating the antenna arms on both sides is disposed in the slit, the spacer having electrical conductivity;

Wherein, each of the antenna arms is electrically connected to the spacer closest to the antenna arm by a preset frequency selection network, and at least one of the spacers is selected to be grounded by a preset frequency. .
The terminal multi-antenna structure according to claim 1, wherein when a plurality of the spacers are disposed in the slit, each two adjacent spacers are electrically connected by a predetermined frequency selection network .
The terminal multi-antenna structure according to claim 1, wherein one of the spacers is disposed in the slit, the spacers are grounded by a preset frequency selection network, and each of the antenna arms and the antenna are separated from the antenna. The spacers closest to the arm are electrically connected by a predetermined frequency selection network.
The terminal multi-antenna structure according to claim 1, wherein two of the spacers are disposed in the slot, and the two of the spacers are electrically connected by 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 1, wherein three of the spacers are disposed in the fracture, and each two adjacent ones are electrically connected by a predetermined frequency selection network, wherein One of the spacers is further grounded by a preset frequency selection network, 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 any one of claims 1 to 5, 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, by serial connection and/or Or a combination of parallel ways.
The terminal multi-antenna structure according to any one of claims 1 to 5, 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 5, 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 5, 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 5, 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 1-10.