WO2023231403A1

WO2023231403A1 - Sar test apparatus and electronic device

Info

Publication number: WO2023231403A1
Application number: PCT/CN2022/142414
Authority: WO
Inventors: 吴小浦
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-05-30
Filing date: 2022-12-27
Publication date: 2023-12-07
Also published as: CN114924134B; CN114924134A

Abstract

An SAR test apparatus and an electronic device. The SAR test apparatus is an SAR test solution of a common antenna radiator, and a stacking space is saved. Two antenna radiators (110, 120) of the SAR test apparatus are provided diagonally, so that BODY‑SAR‑6 surface test is achieved, and a main body to be tested which approaches from the front surface, the back surface, the left side surface, the right side surface, the upper side surface and the lower side surface of the electronic device can be sensed; moreover, the two antenna radiators (110, 120) are provided in an SAR hot spot area, so that the SAR test apparatus better achieves full coverage of SAR hot spots, and the accuracy of SAR test is greatly improved.

Description

A SAR detection device and electronic equipment

Technical field

This application relates to but is not limited to communication technology, and particularly refers to a SAR detection device and electronic equipment.

Background technique

With the rapid development of information technology, electronic devices with communication functions such as mobile phones are becoming more and more popular and their functions are becoming more and more powerful. Electronic devices usually include antenna modules to implement the communication functions of the electronic device. While people enjoy the various conveniences brought by various electronic devices, they are also increasingly concerned about the impact of electromagnetic radiation from electronic devices on human health.

When the wireless communication function is working and transmitting signals, the electromagnetic waves radiated by the antenna will enter the human skin, muscle tissue and brain close to the antenna. Since various organs of the human body are lossy media, the electromagnetic field in the body will generate current, causing absorption and Dissipation of electromagnetic energy may have harmful effects on human organs. Specific Absorption Rate (SAR) is commonly used in biological dosimetry to characterize this physical process.

How to better control electronic equipment to meet the SAR detection requirements when used by users so that the SAR value of the electronic equipment is within a safe range is an urgent technical problem that needs to be solved.

Summary of the invention

This application provides a SAR detection device and electronic equipment, which can better meet the SAR detection needs, maximize the safety of users using electronic equipment, and improve user experience.

Embodiments of the present application provide a specific absorption rate SAR detection device applied to electronic equipment, including: a SAR sensor, and a first antenna radiator and a second antenna radiator arranged diagonally on the electronic equipment; wherein,

The first antenna radiator is suspended in a first SAR hotspot area, and the first SAR hotspot area at least partially covers two adjacent sides of the electronic device; the first antenna radiator is used for transmitting and receiving The first electromagnetic wave signal senses the proximity of the subject to be detected to the first SAR hotspot area and generates a first induction signal;

The second antenna radiator is suspended in a second SAR hotspot area, and the second SAR hotspot area at least partially covers the other two adjacent sides of the electronic device; the second antenna radiator is used to Transmitting and receiving a second electromagnetic wave signal and sensing the proximity of the subject to be detected to the second SAR hotspot area and generating a second induction signal;

The SAR sensor is electrically connected to the first antenna radiator and the second antenna radiator, and the SAR sensor is used to obtain at least one of the first induction signal and the second induction signal, To determine whether the subject to be detected is close to the electronic device.

The SAR detection device provided by the embodiment of the present application is a SAR detection solution with a common antenna radiator, which saves stacking space; the two antenna radiators of the SAR detection device are arranged diagonally, realizing BODY-SAR-6-surface detection. The subject to be detected approaching from the front, back, left side, right side, upper side and lower side of the electronic device can be sensed; moreover, the two antenna radiators are set in the SAR hotspot area, making the SAR detection provided by the embodiment of the present application The device better achieves full coverage of SAR hot spots and greatly improves the accuracy of SAR detection.

An embodiment of the present application also provides an electronic device, including the SAR detection device described in any one of the embodiments of the present application.

The electronic equipment provided by the embodiments of the present application, by installing the SAR detection device provided by any embodiment of the present application on the electronic equipment, not only uses a smaller number of antenna components to achieve a larger range of proximity detection of the subject to be detected, but also realizes the close detection of the subject to be detected. The all-round detection of subject proximity improves the sensing accuracy of the electronic device for the subject to be detected, and also improves the functional integration of the antenna assembly. It not only improves the communication quality of the electronic device, but also promotes the miniaturization of the entire electronic device. Improved the intelligent characteristics of electronic equipment.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and obtained by the structure particularly pointed out in the written description, claims and appended drawings.

Figure overview

The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. They are used to explain the technical solution of the present application together with the embodiments of the present application and do not constitute a limitation of the technical solution of the present application.

Figure 1 is a schematic diagram of the distribution of electric field lines when the target object is not close to the antenna assembly;

Figure 2 is a schematic diagram of the distribution of electric field lines when the target object is close to the antenna assembly;

Figure 3 is a schematic structural diagram of the first embodiment of the SAR detection device in the embodiment of the present application;

Figure 4 is a schematic structural diagram of the second embodiment of the SAR detection device in the embodiment of the present application;

Figure 5 is a schematic structural diagram of the third embodiment of the SAR detection device in the embodiment of the present application;

Figure 6 is a schematic structural diagram of the fourth embodiment of the SAR detection device in the embodiment of the present application;

Figure 7 is a schematic structural diagram of the fifth embodiment of the SAR detection device in the embodiment of the present application;

Figure 8 is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

Figure 9 is an exploded schematic diagram of the electronic device provided in Figure 8;

Figure 10 is a schematic structural diagram of the first embodiment of the electronic device in the embodiment of the present application;

Figure 11 is a schematic structural diagram of an embodiment of the first antenna unit of the electronic device in the embodiment of the present application;

FIG. 12 is a schematic structural diagram of a second antenna unit of an electronic device in an embodiment of the present application.

Elaborate

In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are given in the accompanying drawings. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing specific embodiments only and is not intended to limit the application.

It can be understood that the terms "first" and "second" used in this application are only used for descriptive purposes and cannot be understood to indicate or imply the relative importance or implicitly indicate the number of indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

It can be understood that "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have the transmission of electrical signals or data between each other.

As used herein, the singular forms "a," "an," and "the" may include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the terms "comprising" or "having" and the like specify the presence of stated features, integers, steps, operations, components, parts or combinations thereof, but do not exclude the presence or addition of one or more Possibility of other features, integers, steps, operations, components, parts or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

SAR is the electromagnetic power absorbed or consumed by unit mass of human tissue. Electronic devices are usually equipped with SAR sensors, which are used to detect the capacitance value of environmental capacitance. The SAR sensor must use a suspended metal body (also called a sensor sheet) to sense the capacitance change Cuser caused by the proximity of the human body. The capacitance change value is used to determine the distance of the human body. In this way, when the mobile phone detects that the human body is approaching, it can issue a command to reduce the transmission power, thus reducing the SAR value. Figure 1 is a schematic diagram of the distribution of electric field lines when the target object is not close to the antenna assembly. Figure 2 is a schematic diagram of the distribution of electric field lines when the target object is close to the antenna assembly. As shown in Figures 1 and 2, the suspended conductive plate can make the SAR sensor The change in capacitance value caused by the target object approaching the antenna component 100 is detected. In FIG. 2 , the target object is the user's finger as an example. It can be understood that in other embodiments, the target object may be, but is not limited to, other parts of the user's body, such as the head. The capacitance value Csensor in Figure 1=CEnv, the capacitance value Csensor in Figure 2=CEnv+Cuser. Among them, CEnv is the original capacitance value, and Cuser is the change in capacitance when the target object approaches the antenna assembly 100 . In this way, the purpose of the antenna assembly 100 to detect whether the target object is close to the antenna assembly 100 is achieved.

In order to control the SAR value, you can set up a SAR detection circuit in the electronic device, connect the SAR detection circuit to the antenna radiator, and use the antenna radiator as the sensing piece of the SAR detection circuit to detect the proximity of the human body to the electronic device, and detect the proximity of the human body to the electronic device. When the level is lower than a certain threshold, the control system reduces the transmission power of wireless communication, thereby controlling the SAR value of the electronic device to be within a safe range when the user uses it.

Industry SAR detection standards generally include: BODY-SAR-6-surface SAR detection, head SAR detection. North America and Europe also require hot spot SAR detection. SAR hot spots are generally near the antenna. Among them, BODY-SAR-6-side SAR testing requires that the SAR values of the upper, lower, left, right, front and back sides of the electronic device be tested. As for SAR hotspots, the inventor of the present application found through research that, taking the electronic device as a mobile phone as an example, the SAR value of the low-frequency (LB, Lower Band) frequency band and the Wi-Fi frequency band is generally relatively low, while the mid-high frequency (MHB) of 4G/5G , Middle High Band) frequency band and ultra high frequency (UHB, Ultra High Band) frequency band have relatively high SAR values, so the vicinity of MHB/UHB-TX can be considered a SAR hotspot area. In order to better meet the needs of SAR detection, embodiments of this application propose a SAR detection device that can realize BODY-SAR-6 surface detection and can fully cover SAR hot spots.

Figure 3 is a schematic structural diagram of the first embodiment of the SAR detection device in the embodiment of the present application, which is applied to the electronic device 1000. As shown in Figure 3, the SAR detection device in the embodiment of the present application may include: a SAR sensor 150, and The first antenna radiator 110 and the second antenna radiator 120 are diagonally arranged on the electronic device 1000; wherein,

The first antenna radiator 110 is disposed suspended in the first SAR hotspot area, which at least partially covers two adjacent sides of the electronic device; the first antenna radiator 110 is used to transmit and receive the first electromagnetic wave signal. and sensing the proximity of the subject to be detected to the first SAR hotspot area and generating a first sensing signal;

The second antenna radiator 120 is suspended in the second SAR hotspot area, and the second SAR hotspot area at least partially covers the other two adjacent sides of the electronic device; the second antenna radiator 120 is used to transmit and receive the second electromagnetic wave. Signal and sense the proximity of the subject to be detected to the second SAR hotspot area and generate a second sensing signal;

The SAR sensor 150 is electrically connected to the first antenna radiator 110 and the second antenna radiator 120. The SAR sensor 150 is used to obtain at least one of the first induction signal and the second induction signal to determine whether the subject to be detected is close to the electronic device. equipment.

In an illustrative example, the SAR sensor 150 may include a multi-channel SAR sensor. As shown in FIG. 3 , the SAR sensor 150 includes at least two channels, one of which is connected to the first antenna radiator 110 and the other to The second antenna radiator 120 is connected. In an exemplary example, the SAR sensor 150 may also include multiple independent SAR sensors. For example, the SAR sensor 150 may include two SAR sensors, one of which is connected to the first antenna radiator 110 and the other of which is connected to the first antenna radiator 110 . 150 is connected to the second antenna radiator 120 .

In an illustrative example, the first antenna radiator 110 and the second antenna radiator 120 serve as antenna radiating units, and are also provided with circuit structures such as matching circuits and feed sources to form an antenna system. As shown in Figure 4, the SAR detection device provided by the embodiment of the present application may also include a first feed source S10, a first matching circuit M1, a second feed source S20, and a second matching circuit M2. The first feed source S10 passes through the first The matching circuit M1 is electrically connected to the first antenna radiator 110, and the second feed source S20 is electrically connected to the second antenna radiator 120 through the second matching circuit M2.

In one embodiment, the first feed source S10, the first matching circuit M1 and the first antenna radiator 110 may form an antenna system, and the second feed source S20, the second matching circuit M2 and the second antenna radiator 120 may form an antenna system. Both antenna systems can operate simultaneously and independently of each other.

In an exemplary example, the SAR detection device provided by the embodiment of the present application may also include an antenna tuning circuit (not shown in Figure 4). For example, it may include a first tuning circuit T1 and a second tuning circuit T2. The antenna radiator 110 is grounded through the first tuning circuit T1, and the second antenna radiator 120 is grounded through the second tuning circuit T2.

In an exemplary example, as shown in FIG. 5 , the SAR detection device in the embodiment of the present application may further include: a third antenna radiator 130 . The third antenna radiator 130 is disposed in a suspended manner between the first antenna radiator 110 and the third antenna radiator 130 . On the opposite side, and located on the same side of the electronic device 1000 as the second antenna radiator 120, the third antenna radiator 130 is used to send and receive third electromagnetic wave signals and sense the proximity of the subject to be detected and generate a third induction signal;

The SAR sensor 150 is also electrically connected to the third antenna radiator 130. The SAR sensor 150 is used to obtain at least one of the first induction signal, the second induction signal and the third induction signal to determine whether the subject to be detected is close to the electronic device. .

Through the SAR detection device shown in Figure 5, a SAR detection area is added. In this SAR detection area, there is a SAR operating frequency band that exceeds the standard. An antenna radiator is added to the SAR detection area to share the sensor piece for SAR detection. In this way, a more comprehensive Ground coverage of the SAR detection area further improves the accuracy of SAR detection and saves stacking space.

In an exemplary example, as shown in Figure 6, the SAR detection device in the embodiment of the present application may further include: a fourth antenna radiator 140 arranged in the second SAR hotspot area, and the fourth antenna radiator 140 is arranged in a suspended position. On the side opposite to the second antenna radiator 120 and on the same side of the electronic device 1000 as the first antenna radiator 110, the fourth antenna radiator 140 is used to send and receive fourth electromagnetic wave signals and sense the proximity of the subject to be detected. and generate a fourth induction signal;

The SAR sensor 150 is also electrically connected to the fourth antenna radiator 140. The SAR sensor 150 is used to: obtain at least one of the first induction signal, the second induction signal, the third induction signal and the fourth induction signal to determine the detection signal. Whether the subject is near electronic equipment.

Through the SAR detection device shown in Figure 6, the SAR detection area is further increased, and an antenna radiator is added to the SAR detection area to share the sensor piece for SAR detection. In this way, a more comprehensive coverage of the SAR detection area is achieved, and the SAR is further improved. detection accuracy while also saving stacking space.

In an illustrative example, the SAR detection device shown in FIG. 6 not only achieves full coverage of SAR hot spots, but also uses the first antenna radiator 110 and the second antenna radiator 120 provided at the four corners of the electronic device 1000 The third antenna radiator 130 and the fourth antenna radiator 140 realize omnidirectional SAR sensing of the electronic device 1000 including the four corners, and identify whether the electronic device is held with one hand or with both hands. In one embodiment, for example, if it is determined based on the acquired fourth sensing signal that the subject to be detected is close to the fourth antenna radiator 140 of the electronic device, then it can be basically determined that the user is holding the electronic device with one hand at this time. For another example: it is determined based on the acquired second induction signal that there is a third antenna radiator 130 with the subject to be detected close to the electronic device, and based on the acquired fourth induction signal it is determined that there is a fourth antenna radiator 140 with the subject to be detected close to the electronic device, Then, it can be basically determined that the user is holding the electronic device with both hands at this time. In this way, the electronic device can select other uncovered antennas to transmit and receive signals according to the current state of the antenna being held, so as to ensure the user's use experience of the electronic device 1000 .

It can be understood that the third antenna radiator 130 and the fourth antenna radiator 140 serve as antenna radiating units, and are also provided with circuit structures such as matching circuits and feed sources to form an antenna system. The specific implementation can be seen in Figure 4, which will not be discussed here. Repeat. The third antenna radiator 130 and the fourth antenna radiator 140 can also be grounded through the antenna tuning circuit, which will not be described again here.

In an exemplary example, as shown in Figure 7 , the SAR detection device provided by the embodiment of the present application may also include: a SAR sensor 150, a first antenna radiator 110, a third antenna radiator 130, and a fourth antenna radiator. 140; among them,

The third antenna radiator 130 is disposed suspended on the side opposite to the first antenna radiator 110 and is located on a different side of the electronic device 1000 from the first antenna radiator 110. The third antenna radiator 130 is used to transmit and receive third electromagnetic waves. Signal and sense the proximity of the subject to be detected and generate a third sensing signal;

The fourth antenna radiator 140 is suspended in the second SAR hotspot area and is diagonally arranged with the third antenna radiator 130 on the electronic device 1000. The fourth antenna radiator 140 is used to send and receive the fourth electromagnetic wave signal and sense the signal to be detected. The subject's proximity to the second SAR hotspot area and the generation of the fourth induction signal;

The SAR sensor 150 is used to obtain at least one of the first induction signal, the third induction signal and the fourth induction signal to determine whether the subject to be detected is close to the electronic device.

The SAR detection device shown in Figure 7 is also a SAR detection solution with a common antenna radiator, which saves stacking space; two of the three antenna radiators (the third antenna) in the SAR detection device shown in Figure 7 The radiator 130 and the fourth antenna radiator 140) are arranged diagonally, and the other antenna radiator is used for detection of the SAR supplementary area, realizing BODY-SAR-6 surface detection, which can sense from the front, back, left side of the electronic device. The side, right side, upper side and lower side of the subject to be detected are close to each other; and, two of the three antenna radiators (the first antenna radiator 110 and the first antenna radiator 110) in the SAR detection device shown in Figure 7 The four-antenna radiator 140) is arranged in the SAR hotspot area, so that the SAR detection device provided in the embodiment of the present application can better cover the SAR hotspot area, better achieve full coverage of the SAR hotspot, and greatly improve the accuracy of SAR detection.

FIG. 8 is a schematic structural diagram of an electronic device 1000 provided by an embodiment of the present application. The electronic device 1000 can be a phone, a television, a tablet, a mobile phone, a camera, a personal computer, a laptop, a vehicle-mounted device, a headset, a watch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (CPE), etc. A device capable of sending and receiving electromagnetic wave signals. Taking the electronic device 1000 as a mobile phone as an example, for the convenience of description, the definition is made with the electronic device 1000 in the first viewing angle as a reference. The width direction of the electronic device 1000 is defined as the X direction, and the length direction of the electronic device 1000 is defined as the Y direction. The electronic device 1000 is defined as the Y direction. The thickness direction of 1000 is defined as the Z direction. The direction indicated by the arrow is forward.

FIG. 9 is an exploded schematic view of the electronic device provided in FIG. 8 . As shown in FIG. 9 , the electronic device 1000 provided by the embodiment of the present application includes a display screen 300 and a housing 500 that covers the display screen 300 . The housing 500 includes a middle frame 501 and a back cover 502 that cover each other. The back cover 502 is located on the side of the middle frame 501 away from the display screen 300 . The middle frame 501 includes a middle plate and a frame surrounding the middle plate. The middle board is used to install electronic components such as the motherboard 200 and the battery 400 . The edge, frame and back cover 502 of the display screen 300 are connected in sequence. Among them, the frame and the back cover 502 can be integrally formed. Electronic device 1000 also includes antenna assembly 100 . At least part of the antenna assembly 100 is disposed on the mainboard 200 of the electronic device 1000 or is electrically connected to the mainboard 200 of the electronic device 1000 . The antenna assembly 100 is used to receive and receive radio frequency signals to implement the communication function of the electronic device 1000 . It should be noted that the installation position of the antenna assembly 100 in FIG. 9 is only an illustration example and is not used to limit the installation position of the antenna assembly of the present application, nor is it used to limit the protection scope of the present application.

An embodiment of the present application also provides an electronic device, which may at least include the SAR detection device provided by any embodiment of the present application. By arranging a SAR detection device in an electronic device, not only a smaller number of antenna components are used to achieve a larger range of proximity detection of the subject to be detected, but also an all-round detection of the approach of the subject to be detected is achieved, which improves the sensing of the subject to be detected by the electronic device. It also improves the functional integration of the antenna assembly, improves the communication quality of electronic equipment, promotes the miniaturization of the entire electronic equipment, and improves the intelligent characteristics of electronic equipment.

Figure 10 is a schematic structural diagram of the first embodiment of the electronic device in the embodiment of the present application. As shown in Figure 10, it can at least include: a housing 500 and a SAR detection device; wherein,

The housing 500 includes a first corner portion 510 and a second corner portion 520 arranged diagonally;

The SAR detection device may include: a SAR sensor 150, a first antenna radiator 110 and a second antenna radiator 120; wherein,

The first antenna radiator 110 belongs to the first antenna unit 10 in the antenna assembly 100 of the electronic device. The first antenna radiator 110 is at least partially suspended at or close to the first corner 510 located in the first SAR hotspot area. The antenna radiator 110 is used to transmit and receive the first electromagnetic wave signal and sense the proximity of the subject to be detected to the first SAR hotspot area and generate the first induction signal;

The second antenna radiator 120 belongs to the second antenna unit 20 in the antenna assembly 100 of the electronic device. The second antenna radiator 120 is at least partially suspended at or close to the second corner portion 520 located in the second SAR hotspot area. The antenna radiator 120 is used to transmit and receive the second electromagnetic wave signal and sense the proximity of the subject to be detected to the second SAR hotspot area and generate a second induction signal;

In an illustrative example, as shown in FIG. 10 , the housing 500 includes a first corner portion 510 and a second corner portion 520 arranged diagonally, and a third corner portion 530 and a fourth corner arranged diagonally. Department 540. In one embodiment, the housing 500 includes a first side 51 , a second side 52 , a third side 53 and a fourth side 54 connected in sequence. The first side 51 and the third side 53 are arranged opposite to each other. The second side 52 and the fourth side 54 are arranged opposite to each other. The connection between the first side 51 and the second side 52 is a first corner portion 510 . The connection between the third side 53 and the fourth side 54 is the second corner portion 520 . The connection between the first side 51 and the fourth side 54 is the third corner portion 530 . The connection between the second side 52 and the third side 53 is the fourth corner portion 540 .

In one embodiment, the first corner portion 510 , the second corner portion 520 , the third corner portion 530 and the fourth corner portion 540 are all located on the outer surface of the frame. Taking FIG. 10 as an example, the first corner part 510 may be the upper right corner of the housing 500, the second corner part 520 may be the lower left corner of the housing 500, the third corner part 530 may be the upper left corner of the housing 500, and the fourth corner part 530 may be the upper left corner of the housing 500. The corner portion 540 may be the lower right corner of the housing 500 . In other embodiments, the first corner portion 510 may be a corner covered by the first SAR hotspot area of the housing 500, and the second corner portion 520 may be a corner covered by the second SAR hotspot area of the housing 500, And the first corner part 510 and the second corner part 520 are arranged diagonally. The fourth corner portion 540 may be a corner covered by the second SAR hotspot area of the housing 500 .

In an illustrative example, as shown in FIG. 10 , at least part of the first antenna unit 10 is provided at or close to the first corner portion 510 . The first antenna unit 10 includes a first antenna radiator 110 . The first antenna radiator 110 is used to send and receive first electromagnetic wave signals and generate a first induction signal when the subject to be detected approaches. The first induction signal is used to feedback that the subject to be detected is close to the first antenna radiator 110 . The subject to be detected may include but is not limited to the human body. In this embodiment, the subject to be detected is the human body.

In an illustrative example, as shown in FIG. 10 , the first antenna radiator 110 may be located at the first corner portion 510 . In one embodiment, the first antenna radiator 110 may be integrated on the frame and/or the battery cover, and may be located at or near the first corner 510; or, the first antenna radiator 110 may be located on the housing. The first antenna radiator 110 is formed on a flexible circuit board and is attached to the inside of the first corner 510 . In this embodiment, a part of the first antenna radiating element 110 is provided on the first side 51 , and the other part is provided on the second side 52 .

In an illustrative example, as shown in FIG. 10 , at least part of the second antenna unit 20 is provided at or close to the second corner portion 520 . The second antenna unit 20 includes a second antenna radiator 120 . The second antenna radiator 120 is used to transmit and receive second electromagnetic wave signals and generate a second induction signal when the subject to be detected approaches. The second induction signal is used to feedback that the subject to be detected approaches the second antenna radiator 120 . The subject to be detected may include but is not limited to the human body. In this embodiment, the subject to be detected is the human body.

In an illustrative example, as shown in FIG. 10 , the second antenna radiator 120 may be located at the second corner portion 520 . In one embodiment, the second antenna radiator 120 may be integrated into the frame and/or the battery cover. on, and is located at or near the second corner portion 520; or, the second antenna radiator 120 is located in the space surrounded by the housing 500 and is located at or near the second corner portion 520, for example, the second antenna The radiator 120 is formed on the flexible circuit board and attached to the inside of the second corner portion 520 . In this embodiment, a part of the second antenna radiator 120 is provided on the third side 53 , and the other part is provided on the fourth side 54 .

8 and 9 , the electronic device 1000 includes a front, a back, a left side, a right side, an upper side and a lower side. Among them, the front and the back are arranged opposite to each other. The front side is the side where the display screen 300 is located, and it is also the side facing the positive direction of the Z-axis. The back side is the side where the back cover 502 is located, and it is also the side facing the opposite direction of the Z-axis. The left side and the right side are respectively facing the positive direction of the X-axis. The face and the face opposite to the X-axis. The upper side faces the positive direction of the Y-axis, and the lower side faces the opposite side of the Y-axis.

When the first antenna radiator 110 is disposed at the first corner 510, the first antenna radiator 110 can sense the subject to be detected approaching from the front, back, right side, and upper side; when the second antenna radiator 120 is disposed at At the second corner portion 520 , the second antenna radiator 120 can sense the subject to be detected approaching from the front, back, left side, and lower side. Therefore, by arranging the first antenna radiator 110 and the second antenna radiator 120 at the first corner portion 510 and the second corner portion 520 respectively, sensing from the front, back, left side, right side, upper side and In this way, the less arranged antenna assembly 100 can realize the omnidirectional sensing of the subject to be detected that is close to the electronic device 1000 within the spherical range, thus meeting the requirements of BODY-SAR-6 surface detection. Moreover, the first antenna radiator 110 and the second antenna radiator 120 are arranged in the SAR hotspot area, so that the SAR detection better covers the SAR hotspot area, better realizes the full coverage of the SAR hotspot, and greatly improves the accuracy of the electronic device 1000. Sensing accuracy of the subject to be detected.

In the electronic device 1000 provided by the embodiment of the present application, by disposing the first antenna unit 10 and the second antenna unit 20 respectively on two corners of the electronic device 1000, the first antenna unit 10 and the second antenna unit 20 not only transmit and receive electromagnetic wave signals. , and also achieves a larger range of proximity detection of the subject to be detected with a smaller number of antenna assemblies 100 at the two diagonally arranged corners covering the SAR hotspot area, improves the functional integration of the antenna assemblies 100, and improves the efficiency of electronic equipment The sensing accuracy of 1000 for the subject to be detected not only improves the communication quality of the electronic device 1000, but also promotes the miniaturization of the entire electronic device 1000; The combination of the second antenna unit 20 of the corner portion 520 covers at least 6 surfaces of the electronic device 1000 (the 6 surfaces include the upper, lower, left, right, front and back) for proximity detection of the subject to be detected, thereby achieving all-round detection of the proximity of the subject to be detected. , improves the intelligent detection efficiency of the electronic device 1000 for the approach of the subject to be detected, and thereby effectively determines the working status of the electronic device 1000, so as to make a favorable response to the working status of the electronic device 1000, and improves the efficiency of the electronic device 1000. intelligent features.

In an exemplary example, the first antenna unit 10 may further include: a fifth antenna radiator 1101 and a sixth antenna radiator 1102. In one embodiment, the fifth antenna radiator 1101, the first antenna radiator 110 and the sixth antenna radiator 1102 are arranged in sequence. In one embodiment, one end of the fifth antenna radiator 1101 is grounded, and the other end of the fifth antenna radiator 1101 is coupled to one end of the first antenna radiator 110; the other end of the first antenna radiator 110 is coupled to the sixth antenna. One end of the radiator 1102 is coupled, and the other end of the sixth antenna radiator 1102 is grounded.

In an embodiment, as shown in Figure 10, the first antenna unit 10 further includes: a first feed source S10, a fifth feed source S11, and a sixth feed source S12. The first feed source S10 enables the first antenna radiator 110 to transmit and receive a first electromagnetic wave signal, and the first electromagnetic wave signal includes but is not limited to an electromagnetic wave signal in the MHB frequency band and/or the UHB frequency band. The fifth feed source S11 enables the fifth antenna radiator 1101 to transmit and receive fifth electromagnetic wave signals, which include but are not limited to electromagnetic wave signals in the MHB frequency band and/or UHB frequency band. The sixth feed source S11 enables the sixth antenna radiator 1102 to transmit and receive a sixth electromagnetic wave signal, and the sixth electromagnetic wave signal includes but is not limited to an electromagnetic wave signal in the UHB frequency band.

In an embodiment, not shown in FIG. 10 , the first antenna unit 10 further includes: a first matching circuit M1, a fifth matching circuit M5, and a sixth matching circuit M6. The first feed source S10 is electrically connected to the first antenna radiator 110 through the first matching circuit M1, the fifth feed source S11 is electrically connected to the fifth antenna radiator 1101 through the fifth matching circuit M5, and the sixth feed source S12 is electrically connected to the fifth antenna radiator 1101 through the fifth matching circuit M5. The matching circuit M6 is electrically connected to the sixth antenna radiator 1102.

In an exemplary example, the second antenna unit 20 may further include: a seventh antenna radiator 1201. In one embodiment, the second antenna radiator 120 and the seventh antenna radiator 1201 are arranged in sequence. In one embodiment, one end of the second antenna radiator 120 is suspended, and the other end of the second antenna radiator 120 is coupled to one end of the seventh antenna radiator 1201; the other end of the seventh antenna radiator 1201 is grounded.

In an embodiment, as shown in FIG. 10 , the second antenna unit 10 further includes: a second feed source S20 and a seventh feed source S21. The second feed source S20 enables the second antenna radiator 120 to transmit and receive a second electromagnetic wave signal, and the second electromagnetic wave signal includes but is not limited to an electromagnetic wave signal in the LB band. The seventh feed source S21 enables the seventh antenna radiator 1201 to transmit and receive a seventh electromagnetic wave signal, which includes but is not limited to electromagnetic wave signals in the MHB frequency band and/or UHB frequency band.

In one embodiment, the antenna unit composition embodiment of the electronic device shown in Figure 10 provides the conventional distribution of LTE/NR-LB/MHB/UHB-TX. Using the SAR detection device provided by the embodiment of the present application, only Two SAR detection sensing sheets, namely the first antenna radiator 110 and the second antenna radiator 120 in Figure 10, are respectively provided in the upper right corner and the lower left corner of the electronic device 1000, and then through the detection of the SAR sensor, a relatively high coverage of SAR is achieved. All hot spots in the high frequency band. In this embodiment, the LB frequency band may include B28/B20/B5/B8/B71, etc., the MHB frequency band may include B1/B2/B3/B4/B39/B40/B41, etc., and the UHB frequency band may include N77/N78/ N79 etc.

In an embodiment, not shown in FIG. 10 , the second antenna unit 20 further includes: a second matching circuit M2 and a seventh matching circuit M7. The second feed source S20 is electrically connected to the second antenna radiator 120 through the second matching circuit M2, and the seventh feed source S21 is electrically connected to the seventh antenna radiator 1201 through the seventh matching circuit M7.

In an illustrative example, in the electronic device 1000 shown in FIG. 10 , in conjunction with what is shown in FIG. 5 , the SAR detection device in the electronic device 1000 may further include: a third antenna radiator 130 , and the third antenna radiator 130 is suspended The third antenna radiator 130 is disposed on the side opposite to the first antenna radiator 110 and is disposed on the same side of the electronic device 1000 as the second antenna radiator 120. The third antenna radiator 130 is at least partially suspended at or near the third corner. Part 530, the third antenna radiator 130 is used to send and receive third electromagnetic wave signals and sense the proximity of the subject to be detected and generate a third induction signal;

In an illustrative example, in the electronic device 1000 shown in FIG. 10 , in conjunction with what is shown in FIG. 6 , the SAR detection device in the electronic device 1000 may further include: a fourth antenna radiator 140 , and the fourth antenna radiator 140 is suspended The fourth antenna radiator 140 is disposed on the side opposite to the second antenna radiator 120 and is located on the same side of the electronic device 1000 as the first antenna radiator 110. The fourth antenna radiator 140 is at least partially suspended and disposed on or close to the second SAR hotspot. In the fourth corner portion 540 of the area, the fourth antenna radiator 140 is used to send and receive fourth electromagnetic wave signals and sense the proximity of the subject to be detected and generate a fourth induction signal;

Figure 11 is a schematic structural diagram of an embodiment of the first antenna unit of the electronic device in the embodiment of the present application. As shown in Figure 11, the first antenna unit 10 includes fifth antenna radiators 1101 arranged in sequence. Radiator 110 and sixth antenna radiator 1102, one end of fifth antenna radiator 1101 is grounded, the other end of fifth antenna radiator 1101 is coupled with one end of first antenna radiator 110; the other end of first antenna radiator 110 It is coupled with one end of the sixth antenna radiator 1102 and the other end of the sixth antenna radiator 1102 is grounded.

In the embodiment shown in Figure 11, on the one hand, the fifth antenna radiator 1101 in the first antenna unit 10 is connected to the fifth feed source S11 through the fifth matching circuit M5, and the MHB-TX3 & UHB-TX1 signals pass through the fifth matching circuit M5 is fed to the fifth antenna radiator 1101. The first antenna radiator 110 in the first antenna unit 10 is connected to the first feed source S10 through the first matching circuit M1, and the MHB-TX2 signal is fed to the fifth antenna radiator 1101 through the first matching circuit M1. On the first antenna radiator 110, the sixth antenna radiator 1102 in the first antenna unit 10 is connected to the sixth feed source S12 through the sixth matching circuit M6, and the UHB-TX2 signal is fed to the sixth antenna through the sixth matching circuit M6. on the radiator 1102. On the other hand, the first antenna radiator 110 returns to the ground through at least one of the capacitor C1, the capacitor C2 and the capacitor C3, serving as a ground return path for the MHB-TX3&UHB-TX1 signal and the MHB-TX2 signal, and serves as a grounding path for the MHB-TX3&UHB-TX1 signal and the MHB-TX2 signal. The TX3&UHB-TX1 signal and the MHB-TX2 signal are isolated from each other (that is, the isolation between the fifth antenna radiator 1101 and the first antenna radiator 110). In one embodiment, the capacitor C2 can be removed and only the capacitor C1 and the capacitor C2 remain. In one embodiment, the capacitor Cn can also be added to the ground to further improve the isolation. In one embodiment, a DC blocking capacitor C4 can be further connected in series between the first matching circuit M1 and the first antenna radiator 110 (generally the capacitance value is 22pF, which has basically no impact on the antenna). Of course, if the first matching Circuit M1 is already equipped with a DC blocking capacitor, so there is no need to add an additional capacitor C4. As shown in FIG. 11 , the first antenna radiator 110 is suspended relative to the SAR sensor 150 . In this embodiment, the SAR sensor 150 can be connected between the capacitor C2 and the first antenna radiator 110 by connecting the first inductor L1 in series. Adding the first inductor L1 can isolate higher frequencies. In one embodiment, the first inductor The value of L1 can be 82nH. In one embodiment, the SAR sensor 150 can also be connected between the capacitor C1 or the capacitor C3 or the capacitor C4 and the first antenna radiator 110 through the first inductor L1 in series, or can be connected to any of the first antenna radiators 110 Location. Through the structure of the first antenna unit 10 shown in Figure 11, in the first SAR hotspot area where the MHB band and UHB band antennas are concentrated, the detection of the subject to be detected close to the SAR hotspot area is realized, so that the SAR detection covers the SAR hotspot well. , greatly improving the accuracy of SAR detection, thereby achieving the purpose of intelligently reducing SAR.

Figure 12 is a schematic structural diagram of a second antenna unit of an electronic device in an embodiment of the present application. As shown in Figure 12, the second antenna unit 20 includes a second antenna radiator 120 and a seventh antenna radiator 120 arranged in sequence. Line radiator 1201. In one embodiment, one end of the second antenna radiator 120 is suspended, and the other end of the second antenna radiator 120 is coupled to one end of the seventh antenna radiator 1201; the other end of the seventh antenna radiator 1201 is grounded.

In the embodiment shown in Figure 12, on the one hand, the second antenna radiator 120 in the second antenna unit 20 is connected to the second feed source S20 through the second matching circuit M2, and the LB-TX signal is fed through the second matching circuit M2. To the second antenna radiator 120, the seventh antenna radiator 120 in the second antenna unit 20 is connected to the seventh feed source S21 through the seventh matching circuit M7, and the MHB-TX1 signal is fed to the seventh feeding source S21 through the seventh matching circuit M7. On the seven-antenna radiator 120. On the other hand, the second antenna radiator 120 is returned to ground through the tuning circuit T1. In one embodiment, a DC blocking capacitor C5 is connected in series between the second matching circuit M2 and the second antenna radiator 120 , and a DC blocking capacitor C6 is connected in series between the tuning circuit T1 and the second antenna radiator 120 . , in one embodiment, the capacitance value of the capacitor C5 and the capacitor C6 can be 22pF, which has basically no impact on the antenna. Of course, if the second matching circuit M2 and the tuning circuit T1 are already equipped with DC blocking capacitors, then there is no need to add additional capacitors C5 and C6. As shown in FIG. 12 , the second antenna radiator 120 is suspended relative to the SAR sensor 150 . In this embodiment, the SAR sensor 150 can be connected between the capacitor C6 and the second antenna radiator 120 through a second inductor L2 in series. Adding the second inductor L2 can isolate higher frequencies. In one embodiment, the second inductor The value of L2 can be 82nH. In one embodiment, the SAR sensor 150 can also be connected between the capacitor C5 and the second antenna radiator 120 through the second inductor L2 in series, or can be connected at any position with the second antenna radiator 120 . Through the structure of the second antenna unit 20 shown in Figure 12, in the second SAR hotspot area where the MHB band antennas are concentrated, the detection of the subject to be detected close to the SAR hotspot area is realized, so that the SAR detection covers the SAR hotspot well, which greatly improves the The accuracy of SAR detection is improved, thereby achieving the purpose of intelligently reducing SAR.

Although the embodiments disclosed in the present application are as above, the described contents are only used to facilitate the understanding of the present application and are not intended to limit the present application. Anyone skilled in the field to which this application belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application. However, the scope of patent protection of this application still must The scope is defined by the appended claims.

Claims

A specific absorption rate SAR detection device, applied to electronic equipment, including: a SAR sensor, and a first antenna radiator and a second antenna radiator arranged diagonally on the electronic equipment; wherein,

The first antenna radiator is suspended in a first SAR hotspot area, and the first SAR hotspot area at least partially covers two adjacent sides of the electronic device; the first antenna radiator is used for transmitting and receiving a first electromagnetic wave signal, and sensing the proximity of the subject to be detected to the first SAR hotspot area and generating a first induction signal;

The second antenna radiator is suspended in a second SAR hotspot area, and the second SAR hotspot area at least partially covers the other two adjacent sides of the electronic device; the second antenna radiator is used to Transmitting and receiving a second electromagnetic wave signal, and sensing the proximity of the subject to be detected to the second SAR hotspot area and generating a second induction signal;

The SAR sensor is electrically connected to the first antenna radiator and the second antenna radiator, and the SAR sensor is used to obtain at least one of the first induction signal and the second induction signal, To determine whether the subject to be detected is close to the electronic device.
The SAR detection device according to claim 1, further comprising: a third antenna radiator;

The third antenna radiator is suspended and disposed on the side opposite to the first antenna radiator, and is located on the same side of the electronic device as the second antenna radiator. The third antenna radiator is Transmitting and receiving the third electromagnetic wave signal and sensing the proximity of the subject to be detected and generating the third induction signal;

The SAR sensor is also electrically connected to the third antenna radiator; the SAR sensor is used to: obtain at least one of the first induction signal, the second induction signal and the third induction signal, To determine whether the subject to be detected is close to the electronic device.
The SAR detection device according to claim 2, further comprising: a fourth antenna radiator arranged in the second SAR hot spot area;

The fourth antenna radiator is suspended and disposed on the side opposite to the second antenna radiator, and is located on the same side of the electronic device as the first antenna radiator. The fourth antenna radiator is Transmitting and receiving the fourth electromagnetic wave signal and sensing the proximity of the subject to be detected and generating the fourth induction signal;

The SAR sensor is also electrically connected to the fourth antenna radiator, and the SAR sensor is used to obtain the first induction signal, the second induction signal, the third induction signal and the fourth induction signal. At least one of the signals is used to determine whether the subject to be detected is close to the electronic device.
The SAR detection device according to any one of claims 1 to 3, wherein the SAR sensor is a multi-channel SAR sensor or includes multiple independent SAR sensors.
The SAR detection device according to any one of claims 1 to 3, wherein the SAR detection device further includes a first feed source, a first matching circuit, a second feed source and a second matching circuit;

The first feed source is electrically connected to the first antenna radiator through the first matching circuit, and the second feed source is electrically connected to the second antenna radiator through the second matching circuit.
The SAR detection device according to claim 5, further comprising a first tuning circuit and a second tuning circuit;

The first antenna radiator is grounded through the first tuning circuit, and the second antenna radiator is grounded through the second tuning circuit.
The SAR detection device according to claim 3, wherein at least one of the third antenna radiator and the fourth antenna radiator is further provided with a matching circuit and a feed source.
The SAR detection device according to claim 7, wherein at least one of the third antenna radiator and the fourth antenna radiator is further grounded through an antenna tuning circuit.
A SAR detection device, applied to electronic equipment, including: a SAR sensor, a first antenna radiator, a third antenna radiator and a fourth antenna radiator; wherein,

The first antenna radiator is suspended in a first SAR hotspot area, and the first SAR hotspot area at least partially covers two adjacent sides of the electronic device; the first antenna radiator is used for transmitting and receiving a first electromagnetic wave signal, and sensing the proximity of the subject to be detected to the first SAR hotspot area and generating a first induction signal;

The third antenna radiator is suspended and disposed on the side opposite to the first antenna radiator, and is located on a different side of the electronic device from the first antenna radiator. The third antenna radiator is Transmitting and receiving the third electromagnetic wave signal and sensing the proximity of the subject to be detected and generating the third induction signal;

The fourth antenna radiator is suspended in the second SAR hotspot area and is diagonally arranged on the electronic device with the third antenna radiator. The fourth antenna radiator is used to send and receive fourth electromagnetic wave signals. and sensing the proximity of the subject to be detected to the second SAR hotspot area and generating a fourth sensing signal;

The SAR sensor is used to obtain at least one of the first induction signal, the third induction signal and the fourth induction signal to determine whether the subject to be detected is close to the electronic device.
An electronic device, including: a housing and a SAR detection device; the housing includes a first corner portion and a second corner portion arranged diagonally; the SAR detection device includes: a SAR sensor, a first antenna radiator and the second antenna radiator; where,

The first antenna radiator belongs to the first antenna unit in the antenna assembly of the electronic device, and the first antenna radiator is at least partially suspended at or near the first corner portion located in the first SAR hotspot area. , the first antenna radiator is used to send and receive first electromagnetic wave signals and sense the proximity of the subject to be detected to the first SAR hot spot area and generate a first induction signal;

The second antenna radiator belongs to the second antenna unit in the antenna assembly, and the second antenna radiator is at least partially suspended at or close to the second corner portion located in the second SAR hotspot area, and The second antenna radiator is used to transmit and receive second electromagnetic wave signals and sense the proximity of the subject to be detected to the second SAR hotspot area and generate a second induction signal;

The SAR sensor is electrically connected to the first antenna radiator and the second antenna radiator, and the SAR sensor is used to obtain at least one of the first induction signal and the second induction signal, To determine whether the subject to be detected is close to the electronic device.
The electronic device according to claim 10, the housing further comprising: a third corner portion and a fourth corner portion arranged diagonally; the SAR detection device further comprising: a third antenna radiator;

The third antenna radiator is disposed in a floating manner on the side opposite to the first antenna radiator and is located on the same side of the electronic device as the second antenna radiator. The third antenna radiator is at least The third antenna radiator is partially suspended and provided at or near the third corner, and the third antenna radiator is used to send and receive third electromagnetic wave signals and sense the proximity of the subject to be detected and generate a third induction signal;

The SAR sensor is also electrically connected to the third antenna radiator; the SAR sensor is used to: obtain at least one of the first induction signal, the second induction signal and the third induction signal, To determine whether the subject to be detected is close to the electronic device.
The electronic device according to claim 11, the SAR detection device further includes a fourth antenna radiator;

The fourth antenna radiator is disposed suspended on the side opposite to the second antenna radiator and is located on the same side of the electronic device as the first antenna radiator. The fourth antenna radiator is at least The fourth antenna radiator is partially suspended at or close to the fourth corner located in the second SAR hotspot area, and the fourth antenna radiator is used to send and receive fourth electromagnetic wave signals and sense the proximity of the subject to be detected and generate a fourth induction signal;

The SAR sensor is also electrically connected to the fourth antenna radiator, and the SAR sensor is used to obtain the first induction signal, the second induction signal, the third induction signal and the fourth induction signal. At least one of the signals is used to determine whether the subject to be detected is close to the electronic device.
The electronic device according to any one of claims 10 to 12, the first antenna unit further includes: a fifth antenna radiator and a sixth antenna radiator;

The fifth antenna radiator, the first antenna radiator and the sixth antenna radiator are arranged in sequence; one end of the fifth antenna radiator is grounded, and the other end of the fifth antenna radiator is connected to the One end of the first antenna radiator is coupled; the other end of the first antenna radiator is coupled with one end of the sixth antenna radiator; the other end of the sixth antenna radiator is grounded.
The electronic device according to any one of claims 13, the first antenna unit further includes: a first feed source, a fifth feed source, and a sixth feed source;

The first feed source causes the first antenna radiator to transmit and receive the first electromagnetic wave signal, where the first electromagnetic wave signal includes at least one electromagnetic wave signal in the mid-high frequency MHB frequency band and the ultra-high frequency UHB frequency band; The fifth feed source enables the fifth antenna radiator to transmit and receive a fifth electromagnetic wave signal, and the fifth electromagnetic wave signal includes an electromagnetic wave signal in at least one of the MHB frequency band and the UHB frequency band; the sixth feed source enables the fifth electromagnetic wave signal to be transmitted and received. The sixth antenna radiator transmits and receives a sixth electromagnetic wave signal, and the sixth electromagnetic wave signal includes an electromagnetic wave signal in the UHB frequency band.
The electronic device according to claim 14, the first antenna unit further includes: a first matching circuit, a fifth matching circuit, and a sixth matching circuit;

The first feed source is electrically connected to the first antenna radiator through the first matching circuit, the fifth feed source is electrically connected to the fifth antenna radiator through the fifth matching circuit, and the The sixth feed source is electrically connected to the sixth antenna radiator through the sixth matching circuit.
The electronic device according to claim 15, wherein the first antenna radiator is returned to ground through at least one of the capacitor C1, the capacitor C2 and the capacitor C3.
The electronic device according to claim 16, wherein a DC blocking capacitor C4 is further connected in series between the first matching circuit and the first antenna radiator.
The electronic device according to claim 17, wherein the SAR sensor is connected between the capacitor C1 or the capacitor C3 or the capacitor C4 and the first antenna radiator through a series first inductor L1, or , the SAR sensor is connected at any position of the first antenna radiator through a series first inductor L1.
The electronic device according to any one of claims 10 to 12, the second antenna unit further includes: a seventh antenna radiator;

The second antenna radiator and the seventh antenna radiator 1 are arranged in sequence; one end of the second antenna radiator is suspended, and the other end of the second antenna radiator is connected to one end of the seventh antenna radiator. Coupling; the other end of the seventh antenna radiator is grounded.
The electronic device according to claim 19, the second antenna unit further includes: a second feed source and a seventh feed source;

The second feed source causes the second antenna radiator to transmit and receive a second electromagnetic wave signal, where the second electromagnetic wave signal includes an electromagnetic wave signal in the low-frequency LB band; the seventh feed source causes the seventh antenna to radiate The body transmits and receives a seventh electromagnetic wave signal, where the seventh electromagnetic wave signal includes an electromagnetic wave signal in at least one of an MHB frequency band and a UHB frequency band.
The electronic device according to claim 20, the second antenna unit further includes: a second matching circuit and a seventh matching circuit;

The second feed source is electrically connected to the second antenna radiator through the second matching circuit, and the seventh feed source is electrically connected to the seventh antenna radiator through the seventh matching circuit.
The electronic device of claim 21, wherein the second antenna radiator is returned to ground through a tuning circuit.
The electronic device according to claim 22, a DC blocking capacitor C5 is further connected in series between the second matching circuit and the second antenna radiator, and between the tuning circuit T1 and the second antenna radiator There is also a DC blocking capacitor C6 connected in series.
The electronic device according to claim 23, wherein the SAR sensor is connected between the capacitor C5 and the second antenna radiator through a second inductor L2 in series, or the SAR sensor is connected through a second inductor in series L2 is connected at any position of the second antenna radiator.