CN112542678B

CN112542678B - Electronic devices

Info

Publication number: CN112542678B
Application number: CN202011379059.8A
Authority: CN
Inventors: 路宝
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2025-03-21
Anticipated expiration: 2040-11-30
Also published as: CN112542678A

Abstract

The present application relates to an electronic device. The electronic device includes a circuit board and an antenna device, and the antenna device is arranged on one side of the circuit board. The antenna device includes a radiator and a feeding point arranged on the radiator. The circuit board is provided with a circuit area and a vacant area, the circuit area is used to arrange circuit wiring, the circuit area is provided with a feeding end, the feeding end is electrically connected to the feeding point, and is used to feed an excitation current to the radiator via the feeding point, the excitation current forms a strong current area on the radiator, and the vacant area is arranged opposite to the strong current area. The circuit area surrounds at least part of the outer edge of the vacant area; the vacant area is configured to make the current in the circuit area flow to a side away from the vacant area. In the above electronic device, since the circuit board is provided with a vacant area, the electric field distribution around the circuit board can be improved, so that the SAR hotspot of the antenna device is offset and dispersed, thereby making the SAR value of the antenna device lower.

Description

Electronic equipment

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to an electronic device with an antenna device.

Background

With the development and progress of technology, communication technology has been rapidly developed and advanced, and with the improvement of communication technology, the popularization of intelligent electronic products has been improved to an unprecedented level, and more intelligent terminals or electronic devices become an indispensable part of people's life, such as smart phones, smart bracelets, smart watches, smart televisions, computers, etc. Currently, a communication antenna is generally arranged in an electronic device to meet the communication requirement of a user. As the demands of people on communication efficiency and types are higher, the power of the antenna in the current electronic device is also higher, so that the radiation effect of the antenna on a human body is also higher, which will have adverse effects on the human body.

Disclosure of Invention

The embodiment of the application provides electronic equipment.

The electronic equipment provided by the embodiment of the application comprises a circuit board and an antenna device, wherein the antenna device is arranged on one side of the circuit board and comprises a radiator and a feed point arranged on the radiator. The circuit board is provided with a circuit area and a vacant area, the circuit area is used for arranging circuit wiring, the circuit area is provided with a feed end, the feed end is electrically connected with a feed point and used for feeding excitation current to the radiator through the feed point, the excitation current is formed on the radiator with a strong current area, and the vacant area is arranged opposite to the strong current area. The circuit region surrounds at least a portion of the outer edge of the void region, and the void region is configured to direct current from the circuit region to a side remote from the void region.

In the electronic device provided by the embodiment of the application, the antenna device comprises the radiator and the feeding point arranged on the radiator, wherein the feeding point is used for feeding excitation current to the radiator, and the excitation current forms a strong current area on the radiator. Because the circuit board is provided with the vacancy area, the vacancy area is opposite to the strong current area of the radiator, the current on the circuit board is deviated due to the existence of the vacancy area, the superposition of the electric field of the current on the circuit board and the electric field of the current in the strong current area of the radiator is avoided, and the electric field distribution around the circuit board can be improved, so that the SAR hot spot of the antenna device is dispersed, and the SAR value of the antenna device is lower. In a specific application example, when the antenna device is applied to the electronic equipment, the vacant area may be disposed on a side of the circuit board that is usually close to a user (for example, disposed at an edge of the circuit board), so that the current on the radiator is biased to an inner space of a solid portion of the circuit board, and the current concentration point of the antenna device and the whole circuit board may be biased to a certain extent, so that the electric field distribution of the antenna device and the whole circuit board is improved, and the SAR hot spot of the antenna device is biased accordingly, thereby reducing the SAR value of the antenna device.

Drawings

In order to more clearly illustrate the technical solutions of the application, the drawings that are required to be used in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the application and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an electronic device according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a circuit board and an antenna device of the electronic device shown in fig. 1.

Fig. 3 is a schematic view of the structure of the circuit board and the antenna device shown in fig. 2.

Fig. 4 is another structural schematic diagram of the circuit board and the antenna device of the electronic device shown in fig. 1.

Fig. 5 is a simulated schematic diagram of the near field electric field distribution of the circuit board and antenna arrangement shown in fig. 2.

Fig. 6 is a schematic view of still another structure of the circuit board and the antenna device of the electronic apparatus shown in fig. 1.

Fig. 7 is a schematic view of still another structure of the circuit board and the antenna device of the electronic apparatus shown in fig. 1.

Fig. 8 is a schematic diagram of an internal structure of the electronic device shown in fig. 1.

Fig. 9 is a partially exploded view of the electronic device shown in fig. 1.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As used in embodiments of the present application, an "electronic device" includes, but is not limited to, a device configured to receive/transmit communication signals via a wireline connection (e.g., via a public-switched telephone network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network) and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," wireless terminal, "" electronic device, "and/or" electronic apparatus. Examples of electronic devices include, but are not limited to, satellite or cellular telephones, personal Communication Systems (PCS) terminals that may combine a cellular radiotelephone with data processing, facsimile and data communication capabilities, PDAs that may include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar and/or a Global Positioning System (GPS) receiver, and conventional laptop and/or palmtop receivers, gaming machines or other electronic devices that include a radiotelephone transceiver.

Electromagnetic wave energy absorption ratio (SAR, specific Absorption Rate) is commonly referred to as an absorption ratio or absorption ratio, and refers to an electronic device electromagnetic wave energy absorption ratio. The method has the specific meaning that under the action of the external electromagnetic field, an induced electromagnetic field is generated in a human body, and as all organs of the human body are consumable mediums, the electromagnetic field in the human body generates induced current, so that the human body can absorb and dissipate electromagnetic energy, and SAR is commonly used in the biological dosimetry to characterize the physical process. SAR is the electromagnetic power absorbed or consumed by human tissue per unit mass, and is expressed in W/kg, or mw/g. The expression formula is SAR=sigma|Ei| ²/2 rho, wherein:

ei is the effective value of the electric field intensity in the cell tissue and is expressed as V/m;

sigma is the conductivity of human tissue, expressed as S/m;

ρ is the density of human tissue expressed in kg/m ³.

SAR in human tissue is proportional to the square of the electric field strength in that tissue and is determined by the parameters of the incident electromagnetic field (e.g., frequency, strength, direction, and source of the electromagnetic field), the relative position of the target, the genetic characteristics of typical tissues of the exposed human body, ground effects, and exposed environmental effects. Safety standards for human exposure to electromagnetic waves, such as the international standard, european standard of less than 2.0w/kg per 10 g and U.S. standard of less than 1.6mw/g per g, have been established in many countries and regions.

Since the stronger the total radiated power (TRP, total Radio Power) of the antenna, the larger the SAR value caused by it, the relationship between SAR and TRP forms a mutual constraint. This relationship of mutual constraints is a difficulty in ensuring low SAR values for current electronic devices under high-demand transmit power conditions. The conventional method for reducing SAR value mainly comprises (1) directly reducing the transmitting power of an antenna to reduce the electromagnetic wave absorption of a human body, but hardly guaranteeing the requirement of TRP (low performance) by reducing the transmitting power of the antenna, the TRP is too low, the communication quality is low, and the increasingly improved communication requirement in the market cannot be met generally, (2) arranging the antenna in the electronic equipment at a position far away from the head direction of a user to reduce the electromagnetic wave absorption of the human body, but the current development trend of the electronic equipment is that the thickness is thinner and thinner, so that the space of the antenna is smaller and smaller, and the distance between the antenna and the head of the user is hardly guaranteed, and (3) attaching a wave absorbing material near the antenna to reduce the electromagnetic wave absorption of the human body, but because the space near the antenna limited by the structural design of the electronic equipment is very small, the wave absorbing material is difficult to attach, and the cost of the wave absorbing material is higher. Therefore, at present, no better scheme is available to reduce the SAR of the antenna and reliably ensure the TRP.

Therefore, the inventor of the present application has found through a great deal of and repeated research that the SAR value corresponding to the antenna of the present electronic device is larger, mainly because the exciting current forms a strong current area on the radiator, the current peak value corresponding to the current on the main board of the electronic device is generated, and the SAR value corresponding to the antenna is larger due to the current peak value on the main board and the current peak value on the antenna radiator. In this regard, the inventors propose an electronic device of the present application. The electronic equipment comprises a circuit board and an antenna device, wherein the antenna device is arranged on one side of the circuit board and comprises a radiator and a feed point arranged on the radiator. The circuit board is provided with a circuit area and a vacant area, the circuit area is used for arranging circuit wiring, the circuit area is provided with a feed end, the feed end is electrically connected with a feed point and used for feeding excitation current to the radiator through the feed point, the excitation current is formed on the radiator with a strong current area, and the vacant area is opposite to the strong current area. The circuit area surrounds at least part of the outer edge of the vacant area, the vacant area is a vacant part on the circuit board, and the vacant area is configured to enable current of the circuit area to flow to one side far away from the vacant area.

In the above-mentioned electronic device, the antenna device includes a radiator and a feeding point disposed on the radiator, the feeding point is used for feeding an excitation current to the radiator, and the excitation current forms a strong current region on the radiator. Because the circuit board is provided with the vacancy area, the vacancy area is opposite to the strong current area of the radiator, the current on the circuit board is deviated due to the existence of the vacancy area, the superposition of the electric field of the current on the circuit board and the electric field of the current in the strong current area of the radiator is avoided, and the electric field distribution around the circuit board can be improved, so that the SAR hot spot of the antenna device is dispersed, and the SAR value of the antenna device is lower. In a specific application example, when the antenna device is applied to the electronic equipment, the vacant area may be disposed on a side of the circuit board that is usually close to a user (for example, disposed at an edge of the circuit board), so that the current on the radiator is biased to an inner space of a solid portion of the circuit board, and the current concentration point of the antenna device and the whole circuit board may be biased to a certain extent, so that the electric field distribution of the antenna device and the whole circuit board is improved, and the SAR hot spot of the antenna device is biased accordingly, thereby reducing the SAR value of the antenna device.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

Referring to fig. 1, an embodiment of the present application provides an electronic device 400, where the electronic device 400 may be, but is not limited to, an electronic device such as a mobile phone, a tablet computer, a smart watch, etc. The electronic device 400 of the present embodiment will be described by taking a mobile phone as an example.

The electronic device 400 includes a circuit board 200 and an antenna device 100, and the antenna device 100 is disposed on one side of the circuit board 200. The antenna device 100 includes an antenna body 10 and a feed 30 connected to the antenna body 10. The antenna body 10 is used for receiving and transmitting signals, and the feed source 30 is used for feeding current signals to the antenna body 10, so that the antenna body 10 can resonate to transmit signals. The feed 30 is connected to the electrical circuit board 200 and may be controlled by the circuit board 200.

Further, the electronic device 400 may further include a housing 1001 and a display screen 1003 disposed on the housing 1001, and the antenna device 100 may be integrated on the housing 1001, so that the spatial layout of the electronic device 400 is compact. In the description of the present application, it should be understood that the terms "upper," "lower," and the like, when used in reference to an orientation or positional relationship shown in the drawings, are merely for convenience of description of the application, and do not denote or imply that the apparatus or elements in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application.

Referring to fig. 2, in the present embodiment, the antenna body 10 includes a radiator 12 and a feeding point 14. The feed point 14 is used to feed an excitation current to the radiator 12, which excitation current forms a high current region on the radiator, which in this specification is to be understood as a region in which the current density is greater than the current density of its periphery. For example, when the antenna body 10 emits a signal, a current enters the radiator 12 from the feed 30 via the feed point 14, a strong current region including a point where the current is strong (a point where the current density is large) is formed near the feed point 14, and thus, a SAR hot spot may exist at the feed point 14 of the radiator 12. In some embodiments, the antenna body may further include a grounding point 16 disposed on the radiator 12, and when the antenna body 10 receives a signal, the radiator 12 converts the electromagnetic wave signal into a current, the current flows back through the grounding point 16, and a strong current area is formed near the grounding point 16 of the radiator 12, so that a SAR hot spot may also exist at the grounding point 16. The presence of these SAR hotspots, especially when the SAR hotspots are located close to the user, can have an adverse effect on the body of the user using the antenna device.

In order to offset the SAR hot spot of the radiator 12 to weaken the adverse effect thereof on the user, the circuit board 200 of the embodiment of the present application is provided with the void region 22, the void region 22 is a material-removed portion of the circuit board 200, and a notch or a through hole is formed on the circuit board 200 so as to improve the electric field distribution of the circuit board 200, and the void region 22 is opposite to the strong current region on the radiator 12, so that the current of the circuit board 200 can relatively meet the strong current region of the radiator 12, thereby offset the SAR hot spot of the antenna device 100. In a specific application example, when the antenna apparatus 100 is applied to the electronic device 400, the void area 22 may be disposed on a side of the circuit board 200 that is generally closer to the user (e.g., located at an edge of the circuit board 200), so that the current on the circuit board 200 is biased to a solid portion of the circuit board 200, and the current concentration point of the circuit board 200 may be offset to a certain extent, so as to change the electric field distribution situation around the antenna apparatus 100, and the SAR hot spot of the antenna apparatus 100 is offset and dispersed accordingly, so that the SAR value of the antenna apparatus 100 can be reduced. Further, in some embodiments of the application, the void 22 may be disposed adjacent to the ground point 16 (e.g., at least a portion of the void 22 is disposed opposite the ground point 16), and in other embodiments, the void 22 may be disposed adjacent to the feed point 14 (e.g., at least a portion of the void 22 is disposed opposite the feed point 14).

In some embodiments, circuit board 200 is provided with a circuit region 24, circuit region 24 surrounding at least a portion of the outer edge of void region 22, enabling void region 22 to be configured such that current from circuit region 24 flows to a side remote from void region 22. The circuit area 24 is used for routing circuits, and the circuit area 24 is provided with a feeding end (not shown) and a grounding end (not shown), wherein the feeding end is electrically connected with the feeding point 14, and the grounding end is electrically connected with the grounding point 16.

In the embodiment of the present application, the structure and shape of the void area 22 are not limited, and may be any through hole structure or any notch structure formed on the circuit board 200. The void region 22 may be defined by a physical boundary of the circuit board 200 or may be defined by both the physical boundary of the circuit board 200 and a reasonable extension of the physical boundary.

Referring to fig. 3, in some embodiments, the circuit board 200 is substantially rectangular, which may be a 100mm by 50mm by 1mm PCB circuit board. The circuit board 200 may include a first side 223, a second side 225, a third side 227, and a fourth side 229. The first side 223 and the second side 225 are disposed opposite each other, and the third side 227 and the fourth side 229 are disposed opposite each other. The third side 227 and the fourth side 229 are connected between the first side 223 and the second side 225, and the first side 223, the second side 225, the third side 227, and the fourth side 229 together form a physical outline of the circuit board 200. The radiator 12 is disposed on one side of the second side 225 and spaced apart from the second side 225 to ensure that the radiator 12 has sufficient clearance. In the present embodiment, the void region 22 is defined by the second side 225, and the void region 22 is disposed at one side of the second side 225 of the radiator 22, so that the current intensity point near the second side 225 is shifted toward the circuit region 24, thereby changing the electric field distribution around the circuit board 200, so that the SAR hot spot of the antenna device 100 is shifted and dispersed accordingly, and the SAR value of the antenna device 100 can be reduced.

In the embodiment shown in fig. 3, the void region 22 is a notch structure formed in the radiator 12, which is a substantially rectangular notch. The notch penetrates the side of the circuit board 200 facing the radiator 12. In this embodiment, at least a part of the area of the void area 22 is opposite to the feeding point 14, so that a certain distance exists between the current on the circuit board 200 and the feeding point 14, which is beneficial to dispersing the strong current points near the feeding point 14, thereby effectively reducing the SAR value of the antenna device 100.

Further, referring to fig. 4, in some embodiments, at least a portion of the area of the void 22 may be opposite to the ground point 16, so that a certain distance exists between the current on the circuit board 200 and the ground point 16, which is beneficial to dispersing the current strong points near the ground point 14, thereby further reducing the SAR value of the antenna device 100. When the outline of the void region 22 is projected toward the radiator 12, the outline of the void region 22 may be projected to cover the feeding point 14 and the ground point 16. Further, the void region 22 may also be opposite the radiating end of the radiator 12, and the outline of the void region 22 may be projected to cover the radiating end of the radiator 12 when the outline of the void region 22 is projected toward the radiator 12.

In some embodiments, the size of the void region 22 (which may be understood as the length dimension of the void region 22) may be set to 10mm or more and 30mm or less, specifically 10m, 12mm, 14mm, 15mm, 18mm, 20mm, 22mm, 24mm, 25mm, 28mm, 30mm, etc., in the extending direction of the radiating end of the radiator (Y direction in fig. 4). The size of the void region 22 (which may be understood as the width dimension of the void region 22) may be set to 1mm or more and 3mm or less in a direction perpendicular to the direction in which the radiation end of the radiator extends (such as the X direction in fig. 4), and may specifically be set to 1.0m, 1.2mm, 1.4mm, 1.5mm, 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.5mm, 2.8mm, 3.0mm, and the like. The above-mentioned length and width dimensions of the void region 22 can define the area of the hollowed-out portion on the circuit board 200 to meet the preset requirement, so as to avoid the influence of the too large hollowed-out area on the structural stability of the circuit board 200, and also avoid the smaller deviation effect of the too small hollowed-out area on the current strong point, so that the structural strength and loading area of the circuit board 200 can be ensured while the SAR hot spot of the antenna device 100 is deviated by defining the length and width dimensions of the void region 22, and when the antenna device 100 is applied to specific electronic equipment, the antenna device 100 can be arranged at a position far away from the user, thereby reducing the adverse influence of the antenna device 100 on the human body. It should be noted that, in the present specification, references to "length" in terms of "length dimension", "length direction", and the like are made to the radiator 12, which is to be understood as a direction in which the radiation end of the radiator 12 extends (for example, a direction from the feeding point 14 to the radiation end, which may also be referred to as an extending direction of the radiation end of the radiator 12), and references to "width" in terms of "width dimension", "width direction", and the like are to be understood as a direction substantially perpendicular to the length.

In some embodiments, to better adjust the impedance of each band of the antenna device 100, the antenna device 100 may further include a matching circuit module 50, where the matching circuit module 50 is connected between the feed 30 and the feed point 14. The matching circuit module 50 is used for assisting tuning of the antenna body 10, and the matching circuit module 50 adjusts the impedance of each wave band, so that the wave band has better matching output, and the resonance frequency of the antenna device 100 can be prevented from being shifted, thereby ensuring that the antenna device 100 has higher radiation performance. The matching circuit 30 may specifically include a PI-type matching circuit, a T-type matching circuit, or the like.

In the electronic device 400 provided in the above embodiment of the present application, since the circuit board 200 is provided with the void region 22, the void region 22 is a portion of the circuit board 200 from which material is removed, so that a notch or a through hole is formed on the circuit board 200, so as to improve the electric field distribution around the circuit board 200, thereby shifting the SAR hot spot of the antenna device 100. In a specific application example, when the antenna apparatus 100 is applied to an electronic device, the void area 22 may be disposed on a side of the circuit board 200 that is generally close to a user (e.g., disposed at an edge of the circuit board 200), so that the current on the radiator 12 is biased to an inner space of a solid portion of the circuit board 200, and the current concentration points of the antenna apparatus 100 and the circuit board 200 may be offset to a certain extent, so that the electric field distribution of the antenna apparatus 100 and the circuit board 200 is improved, and the SAR hot spots of the antenna apparatus 100 are offset and dispersed accordingly, so that the SAR value of the antenna apparatus 100 can be reduced.

Referring specifically to fig. 5, fig. 5 is a schematic diagram illustrating a conventional antenna and a near field electric field distribution of the antenna device 100 and the circuit board 200 provided by some embodiments of the present application, which illustrates an electric field intensity radiated when a resonant frequency of the antenna device 100 is 0.97GHZ and a corresponding SAR peak, wherein a dotted line range a and a dotted line range B are illustrated as areas with stronger electric field intensity, and in the dotted line range a and the dotted line range B, a darker color indicates a stronger electric field intensity, and a lighter color indicates a stronger electric field intensity. As shown in fig. 5 (a), in the conventional electronic device, the circuit board does not have a void region, and in the dotted line range a, the electric field intensity extremum and the electric field distribution range are obviously larger, and the corresponding SAR value peak value is 2.4525W/kg, while in the electronic device provided by the application, the circuit board 20 is provided with a void region 22, and in the dotted line range B, the electric field intensity extremum and the electric field distribution range are relatively smaller, and the corresponding SAR value peak value is 1.87623W/kg, and compared with the antenna structure of the common radiator, the SAR value peak value is approximately reduced by 23%. It can be seen that the antenna device 100 provided in the embodiment of the application has a lower SAR value.

Because the electronic device 400 provided in the embodiment of the present application uses the improved structure of the circuit board 200 to enable the antenna device 100 to have a lower SAR value, the structure of the antenna device 100 may not need to be changed, and compared with the antenna device of the conventional electronic device, the antenna efficiency of the antenna device 100 provided in the embodiment of the present application is not greatly changed (even not changed, and the antenna efficiency thereof is maintained). Therefore, the electronic device 400 can offset and disperse the current strong points of the circuit board 200 and the antenna device 100 in a desired direction by forming the void region 22 on the circuit board 200, so as to improve the electric field distribution condition around the antenna device 100, and the maximum radiation intensity of the electric field is relatively low, and meanwhile, the average value of the overall radiation is not reduced, so that the antenna device 100 still has high radiation efficiency.

In the embodiment of the present application, the shape of the vacant areas 22 is not limited to the shape provided in the above embodiment.

Referring to fig. 6, in some embodiments, the void 22 is substantially triangular and notched and extends through the circuit board 200 toward the side of the radiator 12. When the outline of the void region 22 is projected toward the radiator 12, the outline projection of the void region 22 covers at least the feeding point 14 to facilitate shifting the current strong point at the feeding point 14 to a desired direction. In other embodiments, the hollow region 22 may be a notch with other shapes, such as a circle, a bar, an irregular shape, etc., which will not be described in detail in this specification.

In some embodiments, the void region 22 may also be a via. Specifically, the void region 22 may be a through hole formed in the circuit board 200, which penetrates through two opposite surfaces of the circuit board 200 and is located on a side of the circuit board 200 near the radiator. The through hole may be disposed adjacent to at least one of the feeding point 14 and the grounding point 16, and the shape of the through hole may be triangle, rectangle, circle, ellipse, polygonal hole or other irregular hole, etc., which will not be described in detail in this specification. The void region 22 is in a through hole structure, and the circuit board 200 can be divided into at least two parts, so that the current of the circuit board 200 can be split, the electric field distribution around the circuit board 200 is changed, the SAR hot spot of the antenna device 100 can be shifted, and the overall SAR value of the antenna device 100 is weaker.

In some embodiments, when the void 22 is a through hole formed in the circuit board 200, the circuit board 200 has a physical structure at a portion of the through hole near the radiator 12. The physical structures may not need to be arranged with metal wires, so as to ensure that the antenna device 100 has enough headroom, and the structural strength of the circuit board 200 is high. Further, when the void region 22 is a through hole formed in the circuit board 200, the circuit region 24 may be disposed on a side of the void region 22 away from the radiator 12, but not disposed between the void region 22 and the radiator 12.

In some embodiments, the number of the empty areas 22 on the circuit board 200 may be one or more, so as to facilitate dispersing the current of the circuit board 200 and the current intensity points on the radiator 12, and effectively change the electric field distribution around the circuit board 200. For example, there may be two empty spaces 22 on the circuit board 200, where two empty spaces 22 are spaced apart from each other, and one empty space 22 is opposite to the feeding point 14, and the other empty space 22 may be opposite to the grounding point 16, or opposite to the radiation end of the radiator 12. For another example, there may be three empty areas 22 on the circuit board 200, where the three empty areas 22 are sequentially spaced and respectively opposite to the feeding point 14, the grounding point 16, and the radiation end of the radiator 12.

According to the electronic equipment provided by the embodiment of the application, the circuit board is provided with the vacant area, the vacant area is arranged adjacent to the radiator, so that the current on the circuit board close to the radiator can be offset, the electric field distribution condition around the antenna device is improved, the maximum radiation intensity of the electric field is relatively low, and the antenna device has higher radiation efficiency.

Referring to fig. 7, in some embodiments, the electronic device 400 may further include a coupling metal sheet 70, where the coupling metal sheet 70 is disposed in the hollow region 22 and spaced apart from the radiator 12. There is no electrical connection between the metallic coupling plate 12 and the circuit region 24, and between the radiator 12. Further, the coupling metal sheet 70 is opposite to at least part or all of the structure on the radiator 12 from the feed point 14 to the radiating end, and a predetermined gap is provided between the coupling metal sheet 70 and the radiator 12, so that the coupling metal sheet 12 can be configured to be coupled with the radiator 12. The width of the gap between the coupling metal sheet 70 and the radiator 12 is smaller than a quarter wavelength of the center frequency point of the operating frequency band of the antenna device 100. The coupling metal sheet 70 can be used for receiving the signal of the radiator 12 and radiating the signal secondarily, that is, re-radiating the received signal, so as to share the radiation hot spot of the radiator 12, the concentration of the radiation of the radiator 12 can be reduced, and further, the SAR value of the whole antenna device 100 can be reduced. The shape of the coupling metal sheet 70 is not limited, and it may be a rectangular bar shape, or may be an irregular shape, such as an elongated bar shape having a shaped cutout, groove, protrusion.

In some embodiments, the electronic device 400 may further include a functional module 80, where the functional module 80 may be disposed in the vacant area 22 to reasonably utilize the space of the vacant area 22, so that the internal space of the electronic device 400 is compact. Further, in order to avoid the functional module 80 from affecting the signal transmission of the antenna device 100, the electronic device 400 may further include an inductor 90, and the inductor 90 is connected between the functional module 80 and the circuit board 200. An inductor 90 is connected in series with the functional module 80 for attenuating mutual interference between the functional module 80 and the antenna device 100. At the same time, tuning by means of the inductor 90 and the matching circuit module 50 also weakens the mutual interference between the functional module 80 and the antenna device 100. In particular embodiments, functional module 80 may include a microphone, sensor, or the like, that is a relatively weak electromagnetic radiating element.

Referring to fig. 8, in some embodiments, the housing 1001 includes a rear housing 1010 (fig. 1) and a middle frame 1011, and the rear housing 1010 and the display screen 1003 are respectively disposed on two opposite sides of the middle frame 1011.

The middle frame 1011 may be an integrally formed structure, and may be structurally divided into a supporting portion 1012 and a frame 1013 surrounding the supporting portion 1012. It should be understood that the "carrier" and "frame" are merely named for convenience of description, and the structure filling diagonal lines in the drawings are merely identified for distinction and do not represent the actual structures of the two, and may not have obvious boundaries therebetween, or may be assembled by two or more components, and the naming of the "carrier" and "frame" should not limit the structure of the central frame 1011. The supporting portion 1012 is used for supporting a part of the structure of the display screen 1003, and may also be used for supporting or mounting electronic components of the electronic device 200, such as the circuit board 200, the battery 1006, the sensor module 1007, etc., and the frame 1013 is connected to the periphery of the supporting portion 1012. Further, the frame 1013 is disposed around the outer periphery of the carrier 1012 and protrudes relative to the surface of the carrier 1012, so that the two together form a space for accommodating the electronic component. In the present embodiment, the display screen 1013 is covered on the bezel 1013, and the bezel 1013, the rear case 1010, and the display screen 1003 form the exterior surface of the electronic device 400. The antenna device 100 is integrated in the case 1001, and for example, the antenna device 100 may be provided in the center 1011 or in the rear 1010, which is not limited in this specification.

Further, in the embodiment shown in fig. 8, the bezel 1013 is made of metal, and the antenna device 100 is integrated with the bezel 1013. In this embodiment, the bezel 1013 may be provided with a slit 1014, and the slit 1014 communicates with the outside and divides the bezel 1013 into two parts, and the antenna device 100 is integrated in one part of the bezel 1013. Specifically, the ground point 16 and the feeding point 14 are both disposed on the bezel, and the feeding point 14 is disposed between the slit 1014 and the ground point 16, so that the bezel made of metal can be configured as the radiator 12 to transmit or receive signals, with the radiating end of the radiator 12 being located at one side of the slit 1014. In this way, the metal frame 1013 is used as a part of the radiator of the antenna device 100, which is beneficial to saving space in the electronic device 400, and also provides a larger headroom for the antenna device 100, which is beneficial to ensuring higher radiation efficiency. Further, in the present embodiment, the void region 22 is disposed on a side of the circuit board 200 near the frame 1013, and when the outline of the void region 22 is projected to the frame 1013, the outline projection of the void region 22 covers the slit 1014 and at least part of the structure of the radiator 12.

In the present embodiment, a gap is provided between the portion of the frame 1013 serving as the radiator 12 and the carrier 1013, and the gap communicates with the gap 1014 to space the radiator 12 and the carrier 1012 from each other, so as to avoid the carrier 1012 from affecting the resonance of the radiator 12. Further, a non-shielding body (not shown) made of a non-metal (e.g., resin, etc.) having a characteristic of passing electromagnetic wave signals may be provided in the slot 1014 to allow the antenna device 100 to perform signal transmission. The outer surface of the non-shield is flush with the outer surface of the bezel 1013 to ensure the integrity of the appearance of the electronic device 400.

Further, in the present embodiment, the circuit area 24 of the circuit board 200 is spaced from the frame 1013, so that the circuit area 24 can be spaced from the radiator 12, and the current strong point on the circuit board 200 is relatively far away from the current strong point on the radiator 12, which is beneficial to reducing the SAR value of the antenna device 100.

In this embodiment, the circuit board 200 is disposed on the carrier 1012, a certain distance is provided between the edge of the circuit board 200 and the radiator 12, so that the antenna device 100 has a larger clearance area, and the SAR value of the antenna device 100 can be reduced to a certain extent by dispersing the current concentration position on the circuit board 200 and the current concentration position on the antenna device 100 as much as possible. In this embodiment, the distance between the circuit board 200 and the radiator 12 may be 1-5mm, for example, the distance between the circuit board 200 and the radiator may be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, and so on.

In other embodiments, the bezel 1013 may be made of non-metal, and the antenna device 10 may be integrated with the bezel 1013. For example, the frame 1013 may be made of a plastic, a resin, or the like, and the radiator 12 of the antenna device 10 may be integrated with the frame 1013 by insert molding (e.g., the radiator 12 is integrally embedded in the frame 1013), or may be integrated with the frame 1013 by attaching (e.g., the radiator 12 is attached to the surface of the frame 1013). Referring to fig. 9, in the present embodiment, the radiator 12 of the antenna device 100 is substantially sheet-shaped, and is disposed on the frame 1013 and is substantially perpendicular to the plane of the circuit board 100. The vacant region 22 is disposed on one side of the circuit board 200 close to the frame 1013, so that the current on the circuit board 200 can be offset to a direction relatively far away from the frame 1013, that is, the SAR hot spot of the antenna device 100 is dispersed to a direction relatively far away from the frame 1013, so that the radiation influence of the antenna device 100 on the user can be further weakened.

In the electronic device provided by the above embodiment of the application, the antenna device includes a radiator and a feeding point disposed on the radiator, the feeding point is used for feeding an excitation current to the radiator, and the excitation current forms a strong current region on the radiator. Because the circuit board is provided with the vacancy area, the vacancy area is opposite to the strong current area of the radiator, the current on the circuit board is deviated due to the existence of the vacancy area, the superposition of the electric field of the current on the circuit board and the electric field of the current in the strong current area of the radiator is avoided, and the electric field distribution around the circuit board can be improved, so that the SAR hot spot of the antenna device is dispersed, and the SAR value of the antenna device is lower. In a specific application example, when the antenna device is applied to the electronic equipment, the vacant area may be disposed on a side of the radiator, which is generally towards the user, so that the current on the radiator is biased to a solid portion of the radiator, and the current concentration point of the antenna device may be biased to a certain extent, so that the electric field distribution of the antenna device is improved, and the SAR hot spots of the antenna device are biased and dispersed accordingly, so that the SAR value of the antenna device may be reduced.

It should be noted that, in the present specification, when one component is considered to be "disposed on" another component, it may be connected to or directly disposed on the other component, or may be simultaneously interposed components (i.e., indirectly connected to both), and when one component is considered to be "connected to" the other component, it may be directly connected to the other component, or may be simultaneously interposed components, i.e., indirectly connected to each other.

In this specification, particular features or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned embodiments, it will be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or replacements do not drive the essence of the corresponding technical solution to deviate from the spirit and scope of the technical solution of the embodiments of the present application.

Claims

1. The electronic equipment is characterized by comprising a circuit board and an antenna device, wherein the antenna device is arranged on one side of the circuit board, the antenna device comprises a radiator and a feed point, the radiator is used for radiating signals, the radiator is spaced from the circuit board, and the feed point is arranged on one side, close to the circuit board, of the radiator;

The circuit board is provided with a circuit area and a vacant area, the circuit area is used for arranging circuit wires, the circuit area is provided with a feed end, the feed end is electrically connected with the feed point and used for feeding exciting current to the radiator through the feed point, the exciting current forms a strong current area at the feed point on the radiator, the vacant area is a notch positioned on one side of the circuit board close to the grounding part of the radiator and penetrates through the circuit board and faces one side of the radiator, the vacant area is opposite to the strong current area, at least part of the vacant area is opposite to the feed point, the circuit area surrounds at least part of the outer edge of the vacant area, and the vacant area is configured to enable current flow of the circuit area to be far away from one side of the vacant area.

2. The electronic device of claim 1, further comprising a bezel, wherein the antenna arrangement is integrated with the bezel, and wherein the circuit area of the circuit board is spaced apart from the bezel such that the circuit area is spaced apart from the radiator.

3. The electronic device of claim 2, wherein the radiator is sheet-shaped, and the radiator is disposed on the frame and perpendicular to a plane in which the circuit board is located.

4. The electronic device of claim 2, wherein the void region is provided with a coupling metal sheet having a predetermined gap with the radiator, wherein no electrical connection exists between the coupling metal sheet and the circuit region, and between the coupling metal sheet and the radiator, and wherein the coupling metal sheet is configured to couple with the radiator.

5. The electronic device of claim 4, wherein the coupling metal sheet is opposite to a portion of the radiator from the feed point to a radiation end, and a gap width between the coupling metal sheet and the radiator is smaller than a quarter wavelength of a center frequency point of an operating frequency band of the antenna apparatus.

6. The electronic device of claim 1, further comprising a functional module disposed in the void region and an inductor electrically connected to the circuit region and in series with the functional module.

7. The electronic device of claim 6, wherein the functional module comprises a microphone.

8. The electronic device of claim 1, further comprising a housing, wherein the housing comprises a bearing portion and a frame connected to the bearing portion, wherein the frame is provided with a gap communicated with the outside, and wherein the radiator is integrated on the frame and is located at one side of the gap.

9. The electronic device of claim 8, wherein the bezel is at least partially made of metal, the feed point is disposed on the bezel such that the bezel made of metal is configured as a radiator to transmit or receive signals, and wherein the outline projection of the open area covers the gap and at least a portion of the structure of the radiator when the outline of the open area is projected toward the bezel.

10. The electronic device of claim 9, wherein the antenna arrangement further comprises a ground point disposed on the radiator, wherein at least a partial area of the void area is opposite the ground point, and wherein the projection of the outline of the void area covers the feed point and the ground point when the outline of the void area is projected onto the radiator.