WO2024088118A1

WO2024088118A1 - Electronic device

Info

Publication number: WO2024088118A1
Application number: PCT/CN2023/125101
Authority: WO
Inventors: 王义金
Original assignee: 维沃移动通信有限公司
Priority date: 2022-10-25
Filing date: 2023-10-18
Publication date: 2024-05-02
Also published as: CN115548699A

Abstract

The present application discloses an electronic device, which comprises: a bracket; a UWB antenna, the UWB antenna comprising at least two antenna units, the antenna units being arranged on one side of the bracket, and the other side of the bracket being provided with a reflecting layer; and at least part of the reflecting layer being coupled to at least one of the at least two antenna units.

Description

Electronic equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202211313085.X filed in China on October 25, 2022, the entire contents of which are incorporated herein by reference.

Technical Field

The present application belongs to the technical field of electronic equipment, and specifically relates to an electronic equipment.

Background technique

With the development of 5G communication technology, users have more and more functional requirements for electronic devices, and have put forward higher requirements for the convenience and intelligence of electronic devices. Indoor positioning, object finding, etc. are introduced into electronic devices. Ultra-wideband (UWB) technology is used to realize this function. If this technology needs to obtain a good experience effect, it has high requirements on the performance of the antenna. In order to obtain better characteristics, not only a specific antenna needs to be designed, but also a reasonable layout is required. In related technologies, the antenna space occupied by UWB antennas is large and often cannot be set in the terminal, which is not conducive to the miniaturization of the equipment.

Summary of the invention

The purpose of the embodiments of the present application is to provide an electronic device to solve the problem that the existing UWB antenna occupies a large antenna space.

The electronic device of the embodiment of the present application includes:

Bracket;

A UWB antenna, wherein the UWB antenna comprises at least two antenna units, wherein the antenna units are arranged on one side of the bracket, and a reflective layer is arranged on the other side of the bracket;

At least a portion of the reflective layer is coupled to at least one of the at least two antenna elements.

Wherein, the electronic device further comprises:

A shielding layer is arranged on a side of the reflecting layer away from the bracket, the reflecting layer includes a first reflecting portion and a second reflecting portion, the orthographic projection of the shielding layer on the reflecting layer is located on the first reflecting portion, and the second reflecting portion is coupled with at least one of the at least two antenna units.

Wherein, the at least two antenna units include:

A first antenna unit, a second antenna unit, and a third antenna unit, wherein the second antenna unit is coupled to at least a portion of the reflective layer, and the second antenna unit is used for transmitting and receiving signals.

The second antenna unit includes a radiation plate and a branch, wherein the branch is arranged around the outer periphery of the radiation plate, and the branch is coupled to the radiation plate.

Wherein, the radiation sheet is provided with slots.

Wherein, the at least two antenna units further include:

A fourth antenna unit, wherein the fourth antenna unit is used for sending and receiving signals.

Wherein, the electronic device further comprises:

A frame, at least a part of which serves as a radiator, and the radiator is coupled to the fourth antenna unit.

The operating frequency bands of the second antenna unit and the fourth antenna unit both include the 6.25 GHz-6.75 GHz frequency band and the 7.75 GHz-8.25 GHz frequency band.

Among them, at least one of the antenna units includes a radiation plate and a branch, the branch is arranged around the outer circumference of the radiation plate, and the branch is coupled to the radiation plate.

Wherein, at least one of the antenna units comprises a radiation plate, and a slot is provided on the radiation plate.

Wherein, the electronic device further comprises:

A main board is arranged on the other side of the bracket, and a feeding point is provided on the main board, and the feeding point is electrically connected to the antenna unit.

Wherein, the electronic device further comprises:

A cover body is arranged on one side of the bracket, and the antenna unit is located between the cover body and the bracket.

Wherein, the electronic device further comprises:

A display screen is arranged on the other side of the bracket, and the reflective layer is located between the display screen and the bracket.

In the electronic device of the embodiment of the present application, the UWB antenna includes at least two antenna units, the antenna unit is arranged on one side of the bracket, and a reflective layer is provided on the other side of the bracket, at least a portion of the reflective layer is coupled with at least one of the at least two antenna units, so as to make full use of the space of the bracket, the antenna unit is arranged on one side of the bracket, and the reflective layer is arranged on the other side of the bracket. By coupling at least a portion of the reflective layer with at least one antenna unit, the radiation frequency band of the antenna can be increased, and the space occupied can be reduced. The reflective layer optimizes the radiation directivity of the antenna and improves the positioning performance of the UWB antenna.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of an electronic device in an embodiment of the present application;

FIG2 is another schematic diagram of the structure of the electronic device in the embodiment of the present application;

FIG3 is a schematic diagram of a configuration of an antenna unit;

FIG4 is another schematic diagram of the arrangement of the antenna unit;

FIG5 is a schematic diagram of a setting of contact points;

FIG6 is a schematic diagram of a setting of a shielding layer;

FIG7 is a schematic diagram of a configuration of a contact sheet;

FIG8 is a schematic diagram of the arrangement of a reflective layer and a shielding layer;

Figure 9 shows the isolation of the antenna with and without a shielding layer;

FIG10 is a resonance curve of different antenna units;

FIG11 is another schematic diagram of the arrangement of the antenna unit;

FIG. 12 is another schematic diagram of the arrangement of the antenna unit.

Reference numeral bracket 10;
Reflection layer 20; first reflection portion 21; second reflection portion 22;
Shielding layer 30;
First antenna unit 31; radiation plate 311; branch 312; slot 313;
The second antenna unit 32; the radiation plate 321; the branch 322; the slot 323;
The third antenna unit 33; the radiation plate 331; the branch 332; the slot 333;
a fourth antenna unit 34;
Contact point 314; Contact point 324; Contact point 334; Contact point 344;
Contact piece 315; contact piece 325; contact piece 335; contact piece 345;
Frame 40; radiator 41; insulating material 42;
Main board 50;
Cover body 60;
Display screen 70.

Detailed ways

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here. In addition, "and/or" in the specification and claims represents at least one of the connected objects, and the character "/" generally represents that the objects associated with each other are in an "or" relationship.

The electronic device provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with Figures 1 to 12.

As shown in FIGS. 3 to 12 , the electronic device of the embodiment of the present application includes: a bracket 10 and a UWB antenna. The bracket 10 can be used to install the mainboard. The UWB antenna includes at least two antenna units. For example, the UWB antenna can include three antenna units. The three antenna units can be distributed in an L shape. Positioning (including angle measurement and distance measurement functions) can be performed through the UWB antenna. The antenna unit is arranged on one side of the bracket 10, and a reflective layer 20 is arranged on the other side of the bracket 10. 20 can reflect the signal and improve the radiation capability of the antenna. At least part of the reflective layer 20 is coupled with at least one of the at least two antenna units. For example, part of the reflective layer 20 can be coupled with the antenna unit for transmitting and receiving signals to increase the radiation frequency band of the antenna. The reflective layer 20 and the antenna unit can be made by Laser Direct Structuring (LDS) or Printing Direct Structure (PDS), which is low-cost and has good performance. There is no restriction on the antenna type and polarization direction of the antenna unit, which can be selected according to actual conditions.

In the electronic device of the embodiment of the present application, the space of the bracket is fully utilized, an antenna unit is arranged on one side of the bracket 10, and a reflective layer 20 is arranged on the other side of the bracket 10 to reduce the space occupied. By coupling at least part of the reflective layer 20 with at least one antenna unit, the radiation frequency band of the antenna can be increased, and the space occupied can be reduced. The reflective layer optimizes the radiation directivity of the antenna and improves the positioning performance of the UWB antenna.

In some embodiments, as shown in FIG. 6 to FIG. 8 , the electronic device further includes: a shielding layer 30, the shielding layer 30 is arranged on the side of the reflective layer 20 away from the bracket 10, the shielding layer 30 can be a metal part, and the reflective layer 20 and the shielding layer 30 can be arranged at intervals. The reflective layer 20 includes a first reflective portion 21 and a second reflective portion 22, the orthographic projection of the shielding layer 30 on the reflective layer 20 is located on the first reflective portion 21, the orthographic projection of the shielding layer 30 on the reflective layer 20 overlaps with the first reflective portion 21, the orthographic projection of the shielding layer 30 on the reflective layer 20 does not overlap with the second reflective portion 22, the second reflective portion 22 is coupled with at least one of the at least two antenna units, and the second reflective portion 22 can be coupled with the antenna unit for transmitting and receiving signals to increase the radiation frequency band of the antenna. The shielding layer 30 can improve the isolation between multiple antenna units, and the shielding layer 30 can reduce the interference of other signals on the antenna unit. The interaction between the reflective layer 20 and the shielding layer 30 can improve the isolation of the UWB antenna unit and improve the antenna performance. The orthographic projection of the shielding layer 30 on the reflecting layer 20 overlaps with the first reflecting portion 21, and the orthographic projection of the shielding layer 30 on the reflecting layer 20 does not overlap with the second reflecting portion 22. The overlapping area is very close to the shielding layer 30 and is prone to high-frequency coupling to the ground, while the non-overlapping area couples with the antenna unit to form resonance.

Optionally, as shown in FIGS. 3 to 5, 11 and 12, at least two antenna units include: a first antenna unit 31, a second antenna unit 32, and a third antenna unit 33. The second antenna unit 32 is coupled to at least part of the reflective layer 20, and the second antenna unit 32 is used to send and receive signals. The second antenna unit 32 can be coupled to the second reflective portion 22 to increase the radiation frequency band of the antenna. The positioning function can be achieved by the first antenna unit 31, the second antenna unit 32, and the third antenna unit 33. The first antenna unit 31 and the third antenna unit 33 can be used to receive signals. The first antenna unit 31, the second antenna unit 32, and the third antenna unit 33 can choose to receive or send signals according to actual needs, and can also have the function of sending and receiving signals at the same time. The spacing between the reflective layer 20 and the shielding layer 30 is very small, and the spacing between the reflective layer 20 and the shielding layer 30 can be 0.05mm-1.5mm, such as 0.1mm. Due to the very small spacing between the reflective layer 20 and the shielding layer 30, high frequency is coupled to the ground over a large area, and the electric field of the first antenna unit 31, the second antenna unit 32, and the third antenna unit 33 in the UWB antenna is bound by the reflective layer 20. As shown in FIG9 , a represents when there is no shielding layer, and b represents when there is a shielding layer. As can be seen from the dotted box in FIG9 , the existence of the shielding layer 30 can improve the isolation of the first antenna unit 31, the second antenna unit 32, and the third antenna unit 33, and reduce the mutual influence.

The antenna unit on one side of the bracket 10 can operate at a first resonant frequency, and the antenna on the other side of the bracket 10 can operate at a second resonant frequency. The first resonant frequency can be higher than the second resonant frequency. Therefore, the area of a single antenna unit is small, and multiple antennas can be set to have positioning and ranging capabilities. The area of the reflective layer 20 on the other side of the bracket 10 is large. The area that does not overlap with the shielding layer 30 allows the second antenna unit 32 to simultaneously operate at the second resonant frequency, thereby allowing the entire UWB antenna to occupy a smaller space, take into account more antenna frequency bands, and adapt to more application scenarios and the needs of alliance organizations.

In the embodiment of the present application, as shown in FIG. 11 and FIG. 12, the second antenna unit 32 includes a radiation sheet 321 and a branch 322, the branch 322 is arranged around the periphery of the radiation sheet 321, the branch 322 can be an L-shaped or U-shaped structure, the branch 322 is coupled with the radiation sheet 321, and the directivity of the antenna can be adjusted by coupling the branch 322 with the radiation sheet 321, the radiation frequency band of the antenna can be increased, the antenna can be operated at the second resonant frequency, and the radiation capability of the antenna can be improved. The first antenna unit 31, the second antenna unit 32, and the third antenna unit 33 can operate at the first resonant frequency.

Optionally, the radiation piece 321 is provided with a slot 323, and the number of the slot 323 may be one or more. The slot 323 may include a slot in the shape of a straight line, a curve, an arc or a bent line. The radiation piece 321 may be rectangular, the slot 323 may be U-shaped, and the slot 323 may be a closed slot structure, so that it can work at the first resonant frequency and the second resonant frequency at the same time, and the first resonant frequency may be higher than the second resonant frequency. The slot 323 may extend along the edge area of the radiation piece 321, and the slot 323 may extend from the edge of the radiation piece 321 to the inside of the slot 323. The specific shape and number may be selected according to actual conditions. For example, the radiation piece 321 may be rectangular, the slot 323 may be a long strip, and one side edge area of the radiation piece 321 may have a plurality of slots 323 distributed at intervals; or, the two opposite side edge areas of the radiation piece 321 may have one or more slots 323 distributed at intervals, and the resonance of the antenna may be adjusted by the slot 323 on the radiation piece 321.

In some embodiments, as shown in FIG. 3 to FIG. 4 , FIG. 11 and FIG. 12 , at least two antenna units further include: a fourth antenna unit 34 , the fourth antenna unit 34 is used for sending and receiving signals, and the fourth antenna unit 34 can be used to measure distance.

In other embodiments, as shown in FIGS. 1 to 3, 6 and 7, the electronic device further includes: a frame 40, at least a portion of the frame 40 serves as a radiator 41, and the radiator 41 is coupled to the fourth antenna unit 34. For example, the frame 40 may be made of metal, the frame 40 may be in a quadrilateral shape, the frame 40 may include a plurality of portions arranged at intervals, a plurality of notches may be provided on the frame 40, the notches may be filled with insulating material 42, and the insulating material 42 may be plastic or rubber. The frame 40 is divided into a plurality of portions by the notches, and the fourth antenna unit 34 may be arranged close to the insulating material 42. The radiator 41 may be arranged adjacent to the corner of the frame 40, the corner portion of the frame 40 may serve as the radiator 41, and the corner portion of the frame 40 may be coupled to the fourth antenna unit 34. The directivity of the antenna may be adjusted by coupling the radiator 41 with the fourth antenna unit 34, and the antenna pattern may be pulled in the direction of the frame 40, so that the directivity of the antenna may be optimized at the top or corner area of the device.

The fourth antenna unit 34 can be arranged close to the radiator 41, and the fourth antenna unit 34 is coupled with the radiator 41. The directivity of the antenna will be optimized at the top or corner area of the device. At the same time, the second antenna unit 32 is reflected by the device motherboard and the floor, and the directivity will be concentrated to radiate outward from the cover of the device. The directivities of the two antennas can be complementary to a certain extent, so as to enhance the multi-scenario usage experience of the UWB antenna and enhance the car key application experience in the alliance.

The first antenna unit 31, the second antenna unit 32, the third antenna unit 33 and the fourth antenna unit 34 may be provided with vias. As shown in FIG5, the other side of the bracket 10 may be provided with contact points 314, 324, 334 and 344. The antenna units may be electrically connected to the corresponding contact points through the vias. The contact points are not in contact with the reflective layer 20. A certain gap can be made between the reflective layer 20 and the contact point to avoid the contact point. A combiner or RF switch can be added at the RF architecture end to integrate the signals and connect them to the UWB IC chip.

The fourth antenna unit 34 can work at the first resonant frequency and the second resonant frequency at the same time, and the first resonant frequency is higher than the second resonant frequency. As shown in Figure 10, c1 can represent the first antenna unit 31, c2 can represent the second antenna unit 32, and c3 can represent the third antenna unit 33. It can be seen from the curve c2 that the reflective layer 20 and the second antenna unit 32 can form a coupling to work at the first resonant frequency, and the first resonant frequency can be higher than the second resonant frequency. In this way, the structural space of the device can be fully utilized, the antennas can be arranged reasonably, and the space occupied by the positioning antenna can be reduced. At the same time, multiple ranging antenna combinations can be obtained to enhance the experience of scene applications.

Optionally, the operating frequency bands of the second antenna unit 32 and the fourth antenna unit 34 include the 6.25GHz-6.75GHz frequency band and the 7.75GHz-8.25GHz frequency band, so as to support multiple protocols, which can meet the needs of the alliance organization and reduce the antenna space.

In an embodiment of the present application, at least one antenna unit includes a radiating plate and a branch, the branch is arranged around the periphery of the radiating plate, and the branch is coupled to the radiating plate. As shown in Figures 3 to 4, Figures 11 and 12, for example, the first antenna unit 31 includes a radiating plate 311 and a branch 312, the branch 312 is arranged around the periphery of the radiating plate 311, and the branch 312 is coupled to the radiating plate 311. The branch 312 can be L-shaped, and the branch 312 can extend around a corner of the radiating plate 311. The third antenna unit 33 includes a radiating plate 331 and a branch 332, the branch 332 is arranged around the periphery of the radiating plate 331, and the branch 332 is coupled to the radiating plate 331. The branch 332 can be L-shaped, and the branch 332 can extend around a corner of the radiating plate 331. By coupling the branches with the radiating plate, the directivity of the antenna can be adjusted so that the UWB antenna can obtain better signal arrival phase difference (PDOA) characteristics, which can increase the radiation frequency band of the antenna and improve the radiation capability of the antenna.

Optionally, at least one antenna unit includes a radiating plate, and a slot is provided on the radiating plate. As shown in Figures 3 to 4, Figure 11 and Figure 12, for example, the first antenna unit 31 includes a radiating plate 311, and a slot 313 is provided on the radiating plate 311. The radiating plate 311 may be rectangular, and the slot 313 may be a strip. One side edge area of the radiating plate 311 may have one or more slots 313, and the resonance of the antenna can be adjusted by the slot 313. The third antenna unit 33 may include a radiating plate 331, and a slot 333 may be provided on the radiating plate 331. The radiating plate 331 may be rectangular, and the slot 333 may be a strip. The edge areas on both sides of the radiating plate 331 opposite to each other may have one or more slots 333, and the resonance of the antenna can be adjusted by the slot 333.

Optionally, as shown in FIG. 6 and FIG. 7 , the electronic device further includes: a mainboard 50, the mainboard 50 is arranged on the other side of the bracket 10, the mainboard 50 can be arranged on the side of the shielding layer 30 away from the bracket 10, the mainboard 50 has a feeding point, the feeding point is electrically connected to the antenna unit, and the antenna unit can be fed through the mainboard 50. The feeding point can be connected to a contact sheet, a plurality of contact sheets can be arranged on the mainboard 50, and the contact sheet can be a spring sheet. The mainboard 50 can be provided with contact sheets 315, contact sheets 325, contact sheets 335 and contact sheets 345, the contact sheet 315 can be connected to the contact point 314, the contact sheet 325 can be connected to the contact point 324, the contact sheet 335 can be connected to the contact point 334, and the contact sheet 345 can be connected to the contact point 344, so that the mainboard 50 can feed the antenna unit.

Optionally, as shown in FIG. 2 , the electronic device may further include: a cover 60, the cover 60 being disposed on one side of the bracket 10. On the side, the cover 60 can be connected to the bracket 10, the cover 60 can be a battery cover, the antenna unit is located between the cover 60 and the bracket 10, and the antenna unit can radiate toward the direction of the cover 60. The cover 60 can be provided with a plurality of camera modules.

Optionally, as shown in FIG1 , the electronic device further includes: a display screen 70, the display screen 70 is disposed on the other side of the bracket 10, the display screen 70 can be connected to the bracket 10, the display screen 70 can be disposed on the side of the mainboard 50 away from the shielding layer 30, and the reflective layer 20 is located between the display screen 70 and the bracket 10. The display screen 70 can be a touch screen that combines a capacitive touch electrode or is insensitive to touch.

The electronic device may be provided with a wireless circuit, sometimes referred to as a wireless communication circuit, which may be used to support wireless communications in a plurality of wireless communication bands. The communication bands handled by the wireless communication circuit may include satellite navigation system communication bands, cellular phone communication bands, wireless local area network communication bands, near field communication bands, ultra-wideband communication bands, or other wireless communication bands. The electronic device may be a portable electronic device or other suitable electronic device, such as a mobile phone, a tablet, a computer, a wearable device, etc.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

An electronic device, comprising:

Bracket;

A UWB antenna, wherein the UWB antenna comprises at least two antenna units, wherein the antenna units are arranged on one side of the bracket, and a reflective layer is arranged on the other side of the bracket;

At least a portion of the reflective layer is coupled to at least one of the at least two antenna elements.
The electronic device according to claim 1, further comprising:

A shielding layer is arranged on a side of the reflecting layer away from the bracket, the reflecting layer includes a first reflecting portion and a second reflecting portion, the orthographic projection of the shielding layer on the reflecting layer is located on the first reflecting portion, and the second reflecting portion is coupled with at least one of the at least two antenna units.
The electronic device according to claim 1, wherein the at least two antenna units include:

A first antenna unit, a second antenna unit, and a third antenna unit, wherein the second antenna unit is coupled to at least a portion of the reflective layer, and the second antenna unit is used for transmitting and receiving signals.
The electronic device according to claim 3, wherein the second antenna unit comprises a radiation plate and a branch, the branch is arranged around the periphery of the radiation plate, and the branch is coupled to the radiation plate.
The electronic device according to claim 4, wherein the radiation sheet is provided with a slot.
The electronic device according to claim 3, wherein the at least two antenna units further comprise:

A fourth antenna unit, wherein the fourth antenna unit is used for sending and receiving signals.
The electronic device according to claim 6, further comprising:

A frame, at least a part of which serves as a radiator, and the radiator is coupled to the fourth antenna unit.
The electronic device according to claim 6, wherein the operating frequency bands of the second antenna unit and the fourth antenna unit both include a 6.25 GHz-6.75 GHz frequency band and a 7.75 GHz-8.25 GHz frequency band.
The electronic device according to claim 1, wherein at least one of the antenna units comprises a radiation plate and a branch, wherein the branch is arranged around the periphery of the radiation plate, and the branch is coupled to the radiation plate.
The electronic device according to claim 1, wherein at least one of the antenna units comprises a radiation plate having slots therein.
The electronic device according to claim 1, further comprising:

A main board is arranged on the other side of the bracket, and a feeding point is provided on the main board, and the feeding point is electrically connected to the antenna unit.
The electronic device according to claim 1, further comprising:

A cover body is arranged on one side of the bracket, and the antenna unit is located between the cover body and the bracket.
The electronic device according to claim 1, further comprising:

The display screen is arranged on the other side of the bracket, and the reflective layer is located between the display screen and the bracket. Between the racks.