CN213584162U

CN213584162U - Antenna assembly and electronic equipment

Info

Publication number: CN213584162U
Application number: CN202022841298.2U
Authority: CN
Inventors: 郑超; 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: 2021-06-29
Anticipated expiration: 2030-11-30

Abstract

The embodiment of the application provides an antenna assembly and electronic equipment, the antenna assembly includes ground plane, irradiator and signal source, form the gap between irradiator and the ground plane, the irradiator includes at least one depressed part, and the depressed part is located the strong point position of electric current of irradiator, be provided with feed point and earthing terminal on the irradiator, the earthing terminal is connected with ground plane, the signal source is connected with the irradiator at feed point department, the signal source is used for feeding in the excitation signal to the irradiator. The antenna assembly provided by the embodiment of the application can reduce the SAR value of the antenna, does not need to reduce the radio frequency power and does not influence the performance of the antenna.

Description

Antenna assembly and electronic equipment

Technical Field

The present application relates to the field of electronic devices, and in particular, to an antenna assembly and an electronic device.

Background

With the rapid development of communication technology, communication devices have become an indispensable tool in people's life, and bring great convenience to various aspects of users' life. A plurality of antennas generally exist on communication equipment, and particularly, the frequency bands and the number of the antennas of 5G equipment will be more and more in the future.

However, as people pay more and more attention to their health and safety, their radiation of end products is also more and more concerned, and thus the requirements for the SAR (Specific Absorption Rate) value of the end products are also more and more strict. With the increasing market competition, how to make products with high indexes, low radiation and low price becomes a competitive trend for manufacturers of terminal products. The SAR value is in direct proportion to the radiation power of a terminal product, the higher the radiation power is, the higher the SAR is, and the most direct method for reducing the SAR value is to reduce the radiation power. The prior art mainly achieves the reduction of SAR values by RF power back-off.

Disclosure of Invention

The embodiment of the application provides an antenna assembly and electronic equipment, and the SAR value of the antenna can be reduced without reducing power.

An embodiment of the present application provides an antenna assembly, includes:

a ground plane;

the radiator comprises at least one sunken part, the sunken part is positioned at the position of a current strong point of the radiator, a feed point and a grounding end are arranged on the radiator, and the grounding end is connected with the grounding plane;

the signal source is connected with the radiator at the feed point and is used for feeding an excitation signal into the radiator.

An embodiment of the present application further provides an electronic device, where the electronic device includes a housing and an antenna assembly, where the antenna assembly is located inside the housing, and the antenna assembly includes:

a ground plane;

The antenna assembly and the electronic device provided by the embodiment of the application, the antenna assembly comprises a ground plane, a radiating body and a signal source, a gap is formed between the radiating body and the ground plane, the radiating body comprises at least one concave part, the concave part is located at the position of a current strong point of the radiating body, a feeding point and a grounding end are arranged on the radiating body, the grounding end is connected with the ground plane, the signal source is connected with the radiating body at the feeding point, and the signal source is used for feeding an excitation signal into the radiating body. The antenna assembly provided by the embodiment of the application can reduce the SAR value of the antenna, does not need to reduce the radio frequency power and does not influence the performance of the antenna.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

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

Fig. 2 is a schematic structural diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 3 is another schematic structural diagram of an antenna assembly according to an embodiment of the present application.

Fig. 4 is a schematic diagram of a position of the concave portion according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 6 is a schematic view of another structure of an antenna assembly according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The embodiment of the application provides a display screen assembly and electronic equipment. The details will be described below separately. The display screen assembly can be arranged in the electronic device, and the electronic device can be a smart phone, a tablet computer and the like.

Referring to fig. 1, fig. 1 is a schematic view of a first structure of an electronic device 100 according to an embodiment of the present disclosure.

The electronic device 100 includes a display 11, a case 12, a circuit board 13, and a battery 14.

The display screen 11 is disposed on the casing 12 to form a display surface of the electronic device 100, and is used for displaying information such as images and texts. The Display screen 11 may include a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen.

A cover plate may also be mounted on the display screen 11 to cover the display screen 11. The cover plate can be a transparent glass cover plate, so that the display screen light-transmitting cover plate can display. In some embodiments, the cover plate may be a glass cover plate made of a material such as sapphire.

The display screen 11 may include a display area and a non-display area. The display area may be used to display a screen of the electronic device 100 or provide a user with touch control. The top area of the non-display area is provided with an opening for conducting sound and light, and the bottom of the non-display area can be provided with functional components such as a fingerprint module, a touch key and the like.

The structure of the display screen 11 is not limited to this. For example, the display screen 11 may be a full-screen or an odd-screen. It should be noted that, in some embodiments, the display screen 11 may not include the non-display area, but is configured in a full-screen structure, and functional components such as a distance sensor and an ambient light sensor may be disposed below the display screen or at other positions. Wherein, the apron is fit for the size setting of display screen.

The housing 12 is used to form an outer contour of the electronic apparatus 100 so as to accommodate electronic devices, functional components, and the like of the electronic apparatus 100, while providing sealing and protecting functions for the electronic devices and functional components inside the electronic apparatus. For example, the camera, the circuit board, and the vibration motor of the electronic device 100 may be disposed inside the housing 12.

The case 12 may include a middle frame and a rear cover combined with each other to form the case 12, and the middle frame and the rear cover may form a receiving space to receive the circuit board 13, the display screen 11, the battery 14, and the like. Further, a cover plate may be fixed to the case 12, the cover plate and the case 12 forming a closed space to accommodate the circuit board 13, the display screen 11, the battery 14, and the like. In some embodiments, a cover plate is attached to the center frame, a rear cover is attached to the center frame, the cover plate and the rear cover are located on opposite sides of the center frame, and the cover plate and the rear cover are located opposite each other.

In some embodiments, the housing 12 may be a metal housing, such as a metal such as magnesium alloy, stainless steel, and the like. It should be noted that the material of the housing 12 in the embodiment of the present application is not limited to this, and other manners may also be adopted, such as: the housing 12 may be a plastic housing. Also for example: the housing 12 is a ceramic housing. For another example: the housing 12 may include a plastic part and a metal part, and the housing 12 may be a housing structure in which metal and plastic are matched with each other, specifically, the metal part may be formed first, for example, a magnesium alloy substrate is formed by injection molding, and then plastic is injected on the magnesium alloy substrate to form a plastic substrate, so as to form a complete housing structure.

A circuit board 13 is disposed inside the housing 12. The circuit board 13 may be a main board of the electronic device 100. One or more of a processor, a camera, an earphone interface, an acceleration sensor, a gyroscope, a motor and other functional components may also be integrated on the circuit board 13. Meanwhile, the display screen 11 may be electrically connected to the circuit board 13 to control the display of the display screen 11 by a processor on the circuit board 13.

In some embodiments, the circuit board 13 may be secured within the housing 12. Specifically, the circuit board 13 may be screwed to the middle frame by screws, or may be snap-fitted to the middle frame by means of a snap. It should be noted that the way that the circuit board 13 is specifically fixed to the middle frame in the embodiment of the present application is not limited to this, and other ways, such as a way of fixing by a snap and a screw together, may also be used.

The battery 14 is disposed inside the housing 12. Meanwhile, the battery 14 is electrically connected to the circuit board 13 to enable the battery 14 to power the electronic device 100. Wherein, the circuit board 13 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by battery 14 to the various electronic devices in electronic apparatus 100.

Wherein, an antenna assembly 200 is further provided in the electronic device 100. The antenna assembly 200 is used for implementing a wireless Communication function of the electronic device 100, for example, the antenna assembly 200 may be used for implementing a Near Field Communication (NFC) function. The antenna assembly 200 is disposed inside the housing 20 of the electronic device 100. It is understood that some components of the antenna assembly 200 may be integrated on the circuit board 13 inside the housing 12, for example, the signal processing chip and the signal processing circuit in the antenna assembly 200 may be integrated on the circuit board 13. Furthermore, some components of the antenna assembly 200 may also be disposed directly inside the housing 12. An antenna, such as the antenna assembly 200, may be disposed directly inside the housing 12.

In the prior art, the SAR value is in direct proportion to the radiation power of a terminal product, the higher the radiation power is, the higher the SAR value is, and the most direct method for reducing the SAR value is to reduce the radiation power. The north american market mandates that terminals pass the united states Federal Communications Commission (FCC for short) SAR certification test with SAR values below 1.6 mw/g. And reducing the radiated power affects the radiation performance of the antenna. Therefore, the embodiment of the application provides an antenna design scheme, and the SAR value is reduced under the condition that the performance of the antenna is not influenced.

Referring to fig. 2, fig. 2 is a schematic view illustrating a first structure of an antenna assembly according to an embodiment of the present application. The antenna assembly 100 may include a ground plane 50, a radiator 20, and a signal source 30. Specifically, a gap is formed between the radiator 20 and the ground plane 50, the radiator 20 includes at least one recess 21, the recess 21 is located at the current strong point position of the radiator 20, the radiator 20 is provided with a feed point 22 and a ground terminal 23, and the ground terminal 23 is connected to the ground plane 50. A signal source 30 is connected to the radiator 20 at the feed point 22, the signal source 30 being used to feed an excitation signal to the radiator 20.

Further, in the embodiment of the present application, the distance between the feeding point 22 and the recess 21 is smaller than the distance between the ground terminal 23 and the recess 21. That is, the feeding point 22 is located closer to the recess 21 than the ground 23.

In this embodiment, the gap is located between the radiator 20 and the ground plane 50, and the gap may be air or may be filled with a non-conductive material, such as plastic. The gap is filled with the non-conductive material, so that the structural strength of the antenna structure can be improved, and the antenna structure can be more attractive. Preferably, the width of the gap may be less than 5 mm.

In one embodiment, with continued reference to fig. 2, the antenna assembly further includes: a circuit board 13 and a connector 40, wherein the signal source 30 is disposed on the circuit board 13, and the radiator 20 is coupled to a ground plane 50 at the position of the ground terminal 23 through the connector 40 to achieve grounding.

The connecting member 40 may be a thin sheet metal. For example, the connector 40 may be a magnesium alloy sheet, an aluminum alloy sheet, or the like. The connector 40 is disposed at the ground terminal of the radiator 20 and coupled to the ground plane 50. For example, when an FPC (Flexible Printed Circuit) is used as the radiator, the connector 40 may be attached to the FPC, thereby coupling the connector 40 to the FPC. After coupling, the connection member 40 and the FPC can achieve conduction of electrical signals. The FPC antenna refers to a metal antenna pattern formed on an FPC, and the FPC antenna may be fixed to a circuit board by bonding, embedding, welding, or the like.

In other embodiments, the radiator 20 may be formed by a Laser Direct Structuring (LDS) process using a Laser Direct Structuring (LDS) material. The LDS material is a modified plastic containing an organometallic complex that releases metal particles upon laser irradiation. The circuit board formed by three-dimensional printing on the LDS material by using laser can be used as an antenna of a mobile terminal such as a mobile phone.

It should be noted that the ground plane 50 can be regarded as a reference ground of the whole device. The grounding terminal 23 can also be fixedly connected to the whole machine reference ground by welding, and the grounding terminal 23 can also be fixedly connected to the whole machine reference ground by screwing and locking. In other embodiments, the ground terminal 23 may be connected to the reference ground of the whole device through a connection wire.

In an embodiment, as shown in fig. 3, the antenna assembly may further include a middle frame 60, the radiator 20 is attached to an inner side surface of the middle frame 60, the middle frame 60 includes at least one protruding portion 61, and a position of the protruding portion 61 on the middle frame corresponds to the recessed portion 21 on the radiator.

In this embodiment, the position of the recess on the radiator 20 is located at the position of the current strong point of the radiator 20, where the current strong point is the position of the maximum current on the radiator of the antenna when the antenna operates in the operating mode. For example, the current intensity point is the position where the current is maximum on the radiator of the antenna when the antenna operates in the resonant mode at 1/2 wavelengths. In a possible implementation, the operation mode of the antenna may be N times of the resonant mode of 1/2 wavelengths, where N is an integer greater than or equal to 1. That is, the operation mode of the above antenna operation may be a resonance mode of 1/2 wavelengths, a resonance mode of 1 wavelength, a resonance mode of 2 wavelengths, or the like.

Specifically, the current intensity of each position on the radiator 20 may be monitored in real time when the radiator 20 is in operation, so as to find the point on the radiator 20 where the current intensity is the maximum, and thus, the recess may be disposed at the position. As shown in fig. 4, fig. 4 is a schematic diagram of a position setting position of the concave portion provided in the embodiment of the present application. It will be appreciated that the length and depth of the recess may be set according to the current density at that location.

In this embodiment, the protruding portion 61 on the middle frame is cooperatively linked with the recessed portion 21 on the radiator, which can further improve the stability of the radiator 20. Further, the radiator 20 and the middle frame 60 may be bonded by a glue. Wherein, the depth of the concave part 61 on the radiator is larger than the height of the convex part 21 on the middle frame.

Further, referring to fig. 5, in this embodiment, the radiator 20 may include two recesses, namely, a recess 21 and a recess 24, and correspondingly, the middle frame 60 also includes a protrusion 61 and a protrusion 62 at corresponding positions. For example, in this embodiment, there are two current strong points on the radiator 20, and two recesses are respectively disposed at the positions of the two current strong points. It is understood that the positions and the number of the recesses are determined by the circuit strength of each position on the radiator.

In the antenna assembly, an antenna has a return position connected to a ground System and a feed source feeding the antenna, and the antenna can transmit Radio frequency signals such as GSM (Global System for Mobile Communications), LTE (Long Term Evolution), NR (5G New Radio, 5G New air interface), WIFI (Wireless Fidelity, and the like. The position of the current intensity of the original high SAR value mode is provided with the protruding portion on the corresponding middle frame, so that when the FPC antenna is attached, the antenna at the current strong point is bent inwards to form a recessed portion, the position of radiating a strong magnetic field is far away from the outer side of the equipment, the SAR absorbed by a human body is reduced, the current strong point is leaned inwards, and the original antenna is not affected basically.

In an embodiment, referring to fig. 6, the antenna assembly may further include a second radiator 70.

Wherein, the second radiator 70 includes at least one recess 71, just the recess 71 is located the strong point position of electric current of second radiator 70, be provided with second feed point 72 and second ground terminal 73 on the second radiator 70, second ground terminal 73 is connected ground plane 50, second feed point 72 is used for connecting the signal source.

In one embodiment, the radiator 20 may be disposed inside a right middle frame of the electronic device, and the second radiator 70 may be disposed inside a left middle frame of the electronic device. It is understood that the radiator 20 and the second radiator 70 may also be disposed inside the middle frames on the upper and lower sides of the electronic device, respectively, or both the radiator 20 and the second radiator 70 are disposed inside the middle frame on the same side of the electronic device, which is not further limited in this application.

In this embodiment, the radiator 20 and the second radiator 70 may be respectively used for transmitting and receiving 4G (fourth generation mobile communication technology) radio frequency signals or 5G (5th generation mobile networks or 5th generation wireless systems, fifth generation mobile communication technology) radio frequency signals. The 4G bands may include B1/B2/B3/B4/B5/B6/B7/B8/B9/B12/B17/B18/B19/B20/B26/B28, and the 5G bands may include N1/N3/N5/N8/N28/N77/N78/N79. For example, the radiator 20 may be used to transmit and receive 5G rf signals, and the radiator 70 may be used to transmit and receive 4G rf signals. It should be noted that the functions of the radiator 20 and the second radiator 70 can be adjusted according to actual requirements.

In an embodiment, the radiator 20 may be configured to transmit and receive low-frequency rf signals, and the second radiator 70 may be configured to transmit and receive medium-high frequency rf signals. The frequency bands used by the low, middle and high frequency radio frequency signals are different, for example, the low frequency band is 700-. The low, medium, and high frequency bands are not limited to this, and signals of other frequency bands may be transmitted.

In an embodiment, the antenna assembly may further include a third radiator, a fourth radiator, and the like. For example, the radiator 20 and the third radiator are disposed inside a right middle frame of the electronic device, and the second radiator 70 and the fourth radiator are disposed inside a left middle frame of the electronic device. At this time, the radiator 20 and the third radiator may also use the same ground terminal and connector to achieve grounding, and the second radiator 70 and the fourth radiator may also use the same ground terminal and connector to achieve grounding, so that the space of the device is saved for the design of the whole device, and the reuse rate is improved.

In another embodiment, to reduce interference between the four antenna radiators, the four radiators may be disposed on inner surfaces of upper, lower, left, and right middle frames of the electronic device, respectively.

Further, the antenna assembly may further include a communication chip, and the communication chip may be a near field communication chip or a non-near field communication chip. The Near Field Communication chip, such as an NFC (Near Field Communication) chip, may provide a differential excitation current, and the non-Near Field Communication chip, such as a cellular Communication chip, a Wi-Fi chip, or a GPS (Global Positioning System) chip, may provide a non-Near Field Communication excitation current, where the non-Near Field Communication excitation current may include one of a cellular network signal, a Wi-Fi signal, and a GPS signal.

An embodiment of the present invention further provides an electronic device, including a housing and an antenna assembly, where the antenna assembly is located inside the housing, and the antenna assembly includes:

a ground plane;

In an embodiment, the housing includes a metal middle frame and a bottom case, the metal middle frame forms an accommodating space around the bottom case, the antenna assembly is disposed in the accommodating space, and the radiator is attached to an inner side of the metal middle frame.

In an embodiment, the electronic device may further include a carrier board connected to the metal middle frame and serving as a ground plane, and a gap is formed between the radiator inside the metal middle frame and the carrier board.

In an embodiment, the electronic device further includes a battery and a circuit board, the battery and the circuit board are both disposed on the carrier board, and the signal source is disposed on the circuit board.

In addition, it is understood that, when the material of the middle frame may include a metal, for example, a metal such as a magnesium alloy, an aluminum alloy, etc., the metal middle frame may be used to form a system ground, which is a complete ground of the electronic device 100.

In this embodiment, the electronic Device may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or the like.

The antenna assembly and the electronic device provided by the embodiments of the present application, the antenna assembly includes a ground plane, a radiator and a signal source, a gap is formed between the radiator and the ground plane, the radiator includes at least one recessed portion, the recessed portion is located at a current strong point of the radiator, the radiator is provided with a feed point and a ground end, the ground end is connected to the ground plane, the signal source is connected to the radiator at the feed point, and the signal source is configured to feed an excitation signal to the radiator. The antenna assembly provided by the embodiment of the application can reduce the SAR value of the antenna, does not need to reduce the radio frequency power and does not influence the performance of the antenna.

The antenna assembly and the electronic device provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are described herein using specific examples, which are provided only to help understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. An antenna assembly, comprising:

a ground plane;

2. The antenna assembly of claim 1, wherein the location of the current high point is a location on the radiator where current is greatest when the radiator is operating in an operational mode.

3. The antenna assembly of claim 1, further comprising: a circuit board and a connector;

the signal source is arranged on the circuit board, and the radiator is connected with the ground plane at the position of the grounding end through the connecting piece.

4. The antenna assembly of claim 1, wherein the radiator is formed from a flexible circuit board.

5. The antenna assembly of claim 1, further comprising:

the radiator is attached to the inner side of the middle frame, the middle frame comprises at least one protruding portion, and the position of the protruding portion on the middle frame corresponds to the recessed portion on the radiator.

6. The antenna assembly of claim 5, wherein the depth of the recess in the radiator is greater than the height of the protrusion on the middle frame.

7. The antenna assembly of claim 1, further comprising:

the second irradiator, the second irradiator includes at least one depressed part, just the depressed part is located the strong point position of electric current of second irradiator, be provided with second feed point and second earthing terminal on the second irradiator, the second earthing terminal is connected ground plane, the second feed point is used for connecting the signal source.

8. The antenna assembly of claim 7, wherein the radiator is configured to transmit and receive low frequency radio frequency signals and the second radiator is configured to transmit and receive medium and high frequency radio frequency signals.

9. An electronic device comprising a housing and an antenna assembly, the antenna assembly located inside the housing, the antenna assembly comprising:

a ground plane;

10. The electronic device of claim 9, wherein the housing includes a metal middle case and a bottom case, the metal middle case forms a receiving space around the bottom case, the antenna assembly is disposed in the receiving space, and the radiator is attached to an inner side of the metal middle case.