Electronic device

Abstract

The application discloses an electronic device, and belongs to the technical field of communication. The electronic device comprises a SAR sensor, a first antenna pole piece and a second antenna pole piece, wherein the SAR sensor comprises a first detection channel and a second detection channel; the first antenna pole piece is connected with the SAR sensor through the first detection channel; the second antenna pole piece is connected with the SAR sensor through the second detection channel; the SAR sensor determines the distance between the electronic device and a human body through signals of the first antenna pole piece and / or the second antenna pole piece; and an adjusting channel is arranged between the first antenna pole piece and the second antenna pole piece, and is used for adjusting the connection state of the first antenna pole piece and the second antenna pole piece.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to an electronic device. BACKGROUND

[0002] An electronic device with an antenna transmitting device can generate electromagnetic radiation. In order to reduce the influence of electromagnetic radiation on a user, when the user uses the electronic device, the distance between the user and the electronic device is detected by a built-in sensor such as a capacitive proximity sensor or a SAR (Specific Absorption Rate) sensor on the electronic device. When the distance of the user reaches a certain threshold, the radiation power of the antenna is reduced, thereby reducing the radiation to the human body.

[0003] The SAR sensor detects the distance of the user approaching the electronic device by using the metal plate area of an antenna pole piece. One detection channel corresponds to one antenna pole piece, and the antenna pole piece is used as one plate of a capacitor. However, due to the size limitation of the electronic device, the area of the built-in single antenna pole piece is small, which limits the distance detected by the SAR sensor and cannot accurately control the antenna radiation, thereby causing adverse effects on the human body. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide an electronic device which can solve the problem of limited distance detection of the existing SAR sensor.

[0005] In a first aspect, the embodiments of the present application provide an electronic device, comprising:

[0006] a SAR sensor, wherein the SAR sensor comprises a first detection channel and a second detection channel;

[0007] a first antenna pole piece and a second antenna pole piece, wherein the first antenna pole piece is connected to the SAR sensor through the first detection channel, the second antenna pole piece is connected to the SAR sensor through the second detection channel, and the SAR sensor determines the distance between the electronic device and the human body by signals of the first antenna pole piece and / or the second antenna pole piece;

[0008] wherein an adjusting passage is arranged between the first antenna pole piece and the second antenna pole piece, and the adjusting passage is used to adjust the connection state of the first antenna pole piece and the second antenna pole piece.

[0009] In the embodiment of the present application, the electronic device comprises an adjusting passage arranged between the first antenna pole piece and the second antenna pole piece, which is used to adjust the connection state of the first antenna pole piece and the second antenna pole piece. Thus, the adjacent connection of multiple antenna pole pieces can be realized, the area of the antenna pole piece of the electronic device is expanded, and the limit detection distance of the electronic device and the human body detected by the SAR sensor can be correspondingly increased according to the area of the connected multiple antenna pole pieces. The electronic device can detect the user at a farther distance, and when the user is not close to the electronic device, the radiation power of the antenna can be increased, and the performance of the antenna can be improved. When the user is close to the electronic device, the radiation power of the antenna can be reduced, and the radiation to the user can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 FIG. 1 is a circuit structure diagram of an electronic device according to a first embodiment of the present application.

[0011] Figure 2 FIG. 2 is a circuit structure diagram of an electronic device according to a second embodiment of the present application.

[0012] Figures 3-4 FIG. 3 is a parameter adjustment method diagram of the electronic device according to the second embodiment of the present application.

[0013] Figure 5 FIG. 4 is a circuit structure diagram of an electronic device according to a third embodiment of the present application.

[0014] Figure 6 FIG. 5 is a parameter adjustment method flow diagram of the electronic device according to the third embodiment of the present application.

[0015] Figure 7 FIG. 6 is a circuit structure diagram of an electronic device according to a fourth embodiment of the present application.

[0016] Figure 8 FIG. 7 is a parameter adjustment method diagram of the electronic device according to the fourth embodiment of the present application.

[0017] Figure 9 FIG. 8 is a circuit structure diagram of an electronic device according to a fifth embodiment of the present application.

[0018] Figure 10 FIG. 9 is a circuit structure diagram of an electronic device according to a sixth embodiment of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0020] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the objects before and after are in an "or" relationship.

[0021] The electronic device provided by the embodiments of the present application will be described in detail below in combination with the drawings, through specific embodiments and application scenarios.

[0022] The electronic device of the embodiments of the present application comprises: a SAR sensor, the SAR sensor comprising a first detection channel and a second detection channel; a first antenna pole piece and a second antenna pole piece, the first antenna pole piece being connected with the SAR sensor through the first detection channel, and the second antenna pole piece being connected with the SAR sensor through the second detection channel, the SAR sensor determining the distance between the electronic device and a human body through signals of the first antenna pole piece and / or the second antenna pole piece; wherein an adjustment passage is arranged between the first antenna pole piece and the second antenna pole piece, and the adjustment passage is used to adjust the connection state of the first antenna pole piece and the second antenna pole piece.

[0023] The antenna pole piece is a capacitive pole piece, and the relationship among the capacitance of the antenna pole piece, the area of the antenna pole piece, and the distance between the object and the antenna pole piece can be represented by the following formula (1):

[0024]

[0025] Wherein, C is the capacitance between the antenna pole piece and the ground; k is the electrostatic force constant; S is the area of the antenna pole piece; ε is the dielectric constant; h is the distance between the object and the antenna pole piece, that is, the distance between the human body and the electronic device;

[0026] When the human body approaches the antenna pole piece, the dielectric constant will change due to the change of the external medium, so the capacitance between the antenna pole piece and the ground will change.

[0027] The relationship among the capacitance of the antenna pole piece, the amount of charged charge, and the voltage change of the antenna pole piece can be represented by the following formula (2):

[0028]

[0029] Wherein, C is the capacitance between the antenna element and the ground; Q is the charge amount of the antenna element; U is the voltage difference between the antenna element and the ground.

[0030] At this time, the capacitor is charged with the same charge amount, if the voltage difference between the antenna element and the ground changes, the SAR sensor can determine the change amount of the external capacitor by detecting the change of the voltage signal on the antenna element connected to the corresponding detection channel, thereby determining the proximity distance between the human body and the electronic device.

[0031] In the embodiment of the application, the electronic device includes a first antenna element and a second antenna element. An adjustment path is arranged between the first antenna element and the second antenna element, for adjusting the connection state of the first antenna element and the second antenna element.

[0032] Here, the first antenna element and the second antenna element represent that the number of antenna elements included in the electronic device is at least two. Correspondingly, the first detection channel and the second detection channel represent that the number of detection channels included in the SAR sensor is at least two.

[0033] When the number of antenna elements included in the electronic device is more than two, an adjustment path is arranged between each two adjacent antenna elements, and the adjustment path can make the corresponding adjacent antenna elements be in a connected state or in an isolated state. In the following, the embodiment will be described in detail in combination with the drawings.

[0034] In the embodiment of the application, the SAR sensor can detect the voltage signal change of the first antenna element through the first detection channel alone, and determine the distance of the human body from the electronic device, which is proportional to the area of the first antenna element.

[0035] The SAR sensor can also detect the voltage signal change of the second antenna element through the second detection channel alone, and determine the distance of the human body from the electronic device, which is proportional to the area of the second antenna element.

[0036] The SAR sensor can also detect the voltage signal change of the first antenna element and the voltage signal change of the second antenna element through the first detection channel simultaneously, and determine the distance of the human body from the electronic device, which is proportional to the sum of the areas of the first antenna element and the second antenna element.

[0037] The SAR sensor can also detect the voltage signal change of the first antenna element and the voltage signal change of the second antenna element through the second detection channel simultaneously, and determine the distance of the human body from the electronic device, which is proportional to the sum of the areas of the first antenna element and the second antenna element.

[0038] In one embodiment, the adjustment path includes an inductor or a resistor.

[0039] The first antenna pole and the second antenna pole are connected through inductance or resistance, or directly connected through a trace. At this time, one detection channel is selected from the first detection channel and the second detection channel of the SAR sensor to simultaneously detect the signals of the first antenna pole and the second antenna pole, and the other detection channel is disconnected or configured as a high resistance state.

[0040] Reference Figure 1 , Figure 1 is a circuit structure diagram of an electronic device according to a first embodiment of the present application.

[0041] As shown in Figure 1 , the SAR sensor includes a first detection channel 21 and a second detection channel 22, the first detection channel 21 is connected with a detection channel port 1 of the SAR sensor, and the second detection channel 22 is connected with a detection channel port 2 of the SAR sensor. The first detection channel 21 and the second detection channel 22 each include a resistor R, an inductor L, and a capacitor CAP, and a trace Trace connected with a mainboard is further arranged.

[0042] The adjustment path 10 arranged between the first antenna and the second antenna includes an inductor, Figure 1 As shown in the figure, two adjacent and closer first antennas and second antennas are connected through two inductors. When the printed circuit board is laid out, the two inductors can be arranged at the feed ground spring (or feed spring) of the adjacent two first antennas and second antennas, so as to reduce the stray wave generated by the excess trace and ensure the performance of the antenna.

[0043] In Figure 1 the embodiment, the adjustment path 10 includes two inductors, but the number of inductors is not limited in the present application.

[0044] As shown in Figure 1 , the first antenna (i.e. the first antenna pole) is connected with the first detection channel 21 through an interface Con, and the second antenna (i.e. the second antenna pole) is connected with the second detection channel 22 through the interface Con. In the embodiment, only one detection channel is connected with the antenna, and the connection of the other detection channels with the corresponding antenna is disconnected.

[0045] Taking the connection between the first antenna and the first detection channel 21 as an example, in this embodiment, the SAR sensor can simultaneously detect the voltage signal changes of the first antenna pole and the second antenna pole through the first detection channel, and determine the distance of the human body close to the electronic device.

[0046] In other embodiments, the first antenna can be disconnected with the first detection channel 21, and the second antenna can be connected with the second detection channel 22, so that the SAR sensor can simultaneously detect the voltage signal changes of the first antenna pole and the second antenna pole through the second detection channel, and determine the distance of the human body close to the electronic device.

[0047] In this embodiment, by setting an adjusting path of inductance or resistance between the first antenna and the second antenna, the adjacent connection of the plurality of antenna poles is realized, the area of the antenna poles of the electronic device is expanded, and thus the limit detection distance of the electronic device and the human body detected by the SAR sensor can be correspondingly increased according to the area of the connected plurality of antenna poles. Therefore, the electronic device can detect the user at a farther distance, and when the user is not close to the electronic device, the radiation power of the antenna can be increased to improve the performance of the antenna. When the user is close to the electronic device, the radiation power of the antenna is reduced to reduce the radiation to the user.

[0048] In one embodiment, the adjusting path further comprises a switch connected in series with the inductance or connected in series with the resistance.

[0049] The first antenna pole and the second antenna pole are connected through the inductance and the switch in series, or through the resistance and the switch in series, or through the wire and the switch. At this time, by controlling the opening and closing of the switch, the SAR sensor can use the detection channel to detect the signal of the corresponding antenna pole, or select one of the first detection channel and the second detection channel of the SAR sensor to simultaneously detect the signals of the first antenna pole and the second antenna pole.

[0050] Optionally, when the switch is opened, the first antenna pole and the second antenna pole are in an isolated state, and the SAR sensor detects the signal of the first antenna pole through the first detection channel to determine the first distance between the electronic device and the human body, or the SAR sensor detects the signal of the second antenna pole through the second detection channel to determine the second distance between the electronic device and the human body.

[0051] When the switch is closed, the first antenna pole and the second antenna pole are in a connected state, and the SAR sensor detects the signals of the first antenna pole and the second antenna pole through the first detection channel to determine the third distance between the electronic device and the human body, and the second detection channel is in a high resistance state, or the SAR sensor detects the signals of the first antenna pole and the second antenna pole through the second detection channel to determine the third distance between the electronic device and the human body, and the first detection channel is in a high resistance state.

[0052] Reference Figure 2 , Figure 2 is a circuit structure diagram of an electronic device of the second embodiment of the present application.

[0053] In the embodiment, the adjusting path 10 includes two inductors and a switch connected in series between the two inductors. Two adjacent first antennas and second antennas are connected through the two inductors, and a switch is connected in series between the two inductors. The switch can be a common switch, such as an NMOS switch, etc. The first antenna is connected to the first detection channel 21 through the interface Con, and the second antenna is connected to the second detection channel 22 through the interface Con.

[0054] When the switch is closed, one detection channel in the SAR sensor normally works, and the other detection channel is configured in a high-impedance state or is disconnected.

[0055] When the switch is disconnected, the SAR sensor can detect the voltage signal change of the first antenna pole piece through the first detection channel to determine the distance n1 of the human body close to the electronic device. The maximum distance n1 of the electronic device and the human body that can be detected by the SAR sensor is related to the area of the first antenna pole piece. In addition, the SAR sensor can detect the voltage signal change of the second antenna pole piece through the second detection channel to determine the distance n2 of the human body close to the electronic device. The maximum distance n2 of the electronic device and the human body that can be detected by the SAR sensor is related to the area of the second antenna pole piece.

[0056] Optionally, the areas of the first antenna pole piece and the second antenna pole piece are different.

[0057] If the area of the first antenna pole piece is greater than the area of the second antenna pole piece, the distance n1 that can be detected by the SAR sensor is greater than n2; if the area of the second antenna pole piece is greater than the area of the first antenna pole piece, the distance n2 that can be detected by the SAR sensor is greater than n1.

[0058] When the switch is closed, the SAR sensor can simultaneously detect the voltage signal change of the first antenna pole piece and the second antenna pole piece through the normally working first detection channel or the second detection channel to determine the distance n of the human body close to the electronic device. The maximum distance n of the electronic device and the human body that can be detected by the SAR sensor is related to the sum of the areas of the first antenna pole piece and the second antenna pole piece, n>n1, n>n2.

[0059] If the area of the first antenna pole piece is greater than the area of the second antenna pole piece, n>n1>n2.

[0060] The working principle of the electronic device of the second embodiment of the present application will be described below in combination with the embodiment of Figure 3 the first antenna pole piece is greater than the area of the second antenna pole piece and only one detection channel normally works due to the high-impedance configuration.

[0061] Step 102, in the initial state, the switch between the first antenna and the second antenna is closed, and one detection channel is in a low resistance state and the other detection channel is in a high resistance state, for example, the first detection channel connected with the detection channel port 1 is in a low resistance state and the second detection channel connected with the detection channel port 2 is in a high resistance state, at this time the limit distance between the SAR sensor and the user detected by the SAR sensor is n;

[0062] Step 104, determining whether the distance between the SAR sensor and the user detected by the SAR sensor is greater than n;

[0063] Step 106, if yes, the first antenna and the second antenna do not reduce the radiation power;

[0064] Step 108, determining whether the distance between the SAR sensor and the user detected by the SAR sensor is less than n and greater than n1;

[0065] Step 110, if yes, the radiation power of the first antenna and the second antenna is reduced to m1 and k1 respectively;

[0066] Step 112, determining whether the distance between the SAR sensor and the user detected by the SAR sensor is greater than n1 and less than n2;

[0067] Step 114, if yes, the switch between the first antenna and the second antenna is closed, and the distance between the user and the electronic device is detected by the two detection channels respectively;

[0068] Step 116, determining whether the distance between the first channel and the user detected by the SAR sensor is greater than n1;

[0069] Step 118, if yes, the first antenna adjusts the radiation power to m3;

[0070] Step 120, determining whether the distance between the first channel and the user detected by the SAR sensor is less than n1;

[0071] Step 122, if yes, the first antenna adjusts the radiation power to m4;

[0072] Step 124, determining whether the distance between the second channel and the user detected by the SAR sensor is greater than n2;

[0073] Step 126, if yes, the second antenna adjusts the radiation power to k3;

[0074] Step 128, determining whether the distance between the second channel and the user detected by the SAR sensor is less than n2;

[0075] Step 130, if yes, the second antenna adjusts the radiation power to k4.

[0076] In other words, when the switch is closed and the detected distance is greater than n, neither the first nor the second antenna reduces its radiated power; when the switch is closed and the detected distance is less than n but greater than n1, the radiated power of the first antenna is reduced to k1 and the radiated power of the second antenna is reduced to m1.

[0077] When the switch is open and the detected distance is less than n1, reduce the radiation power of the first antenna to m3; when the switch is open and the detected distance is greater than n1, reduce the radiation power of the first antenna to m4.

[0078] When the switch is open and the detected distance is greater than n2, reduce the radiation power of the second antenna to k3; when the switch is open and the detected distance is less than n2, reduce the radiation power of the second antenna to k4.

[0079] In this embodiment, multiple antenna poles are connected adjacently by setting an adjustment path with a switch connected in series with an inductor or resistor between the first and second antenna poles. When the switch is open, the SAR sensor can detect the maximum distance through multiple detection channels, and the maximum distance corresponds to the area of ​​a single antenna pole connected to the detection channel. When the switch is closed, the maximum distance that the SAR sensor can detect corresponds to the area of ​​the connected antenna pole. Different antennas can independently control their radiated power, improving antenna performance at close range.

[0080] By segmenting and connecting adjacent antenna poles, the system can detect distant objects at greater distances without reducing the antenna radiation frequency, thus ensuring antenna performance. As the user approaches the electronic device, the connected antenna poles are disconnected in stages to achieve multi-distance detection. A corresponding radiation frequency threshold is set for each detection distance, causing the antenna radiation frequency to decrease progressively. This minimizes radiation to the user while maintaining optimal antenna performance. Furthermore, when the user is close to the electronic device, all control switches are disconnected, minimizing mutual interference between the two antennas.

[0081] Now for reference Figure 4 , Figure 4 This is a circuit diagram of an electronic device according to the third embodiment of this application.

[0082] like Figure 4 As shown, the adjustment path 10 includes two inductors and a switch connected in series between the two inductors. The first antenna is connected to the first detection channel 21 via interface Con, and the second antenna is disconnected from the second detection channel 22. Two adjacent first antennas and second antennas are connected to the same detection channel port 1 of the SAR sensor via two inductors, with a switch connected in series between the two inductors. This switch can be a common switch, such as an NMOS switch.

[0083] In this embodiment, the connection between the antenna and the corresponding detection channel can be disconnected by the switching element, or it can be realized by cutting off the wire or interface.

[0084] In the layout of the printed circuit board, the two inductors are arranged close to the feed ground patch (or feed patch) of the two antennas, and the switch can be arranged anywhere between the two inductors. Optionally, it is arranged away from the heat source of the resistance device.

[0085] Thus, as Figure 5 shown, when the switch is open, the SAR sensor can detect the voltage signal change of the first antenna pole piece through the first detection channel to determine the distance n1 of the human body close to the electronic device. The maximum distance that the SAR sensor can detect between the electronic device and the human body is related to the area of the first antenna pole piece. At this time, the detection distance sets a corresponding radiation frequency threshold, and when the distance is less than n1, the antenna radiation frequency is reduced to m2.

[0086] When the switch is closed, the SAR sensor can detect the voltage signal change of the first antenna pole piece and the second antenna pole piece through the first detection channel at the same time to determine the distance n2 of the human body close to the electronic device. The maximum distance that the SAR sensor can detect between the electronic device and the human body is related to the sum of the areas of the first antenna pole piece and the second antenna pole piece, and n2>n1. At this time, the detection distance sets a corresponding radiation frequency threshold, and when the distance is greater than n1 and less than n2, the antenna radiation frequency is reduced to m1.

[0087] When the switch is closed, if the SAR sensor detects that the distance between the electronic device and the human body is greater than n2, the antenna does not reduce the radiation power.

[0088] The working principle of the electronic device of the third embodiment of the present application will be described below in combination with the embodiment of Figure 6 .

[0089] As shown in Figure 6 , the following steps are included:

[0090] Step 202, in the initial state, the switch between the first antenna and the second antenna is closed, and at this time the limit distance between the SAR sensor and the user detected by the electronic device is n2;

[0091] Step 204, judge whether the distance between the SAR sensor and the user detected by the electronic device is greater than n2;

[0092] Step 206, if yes, the first antenna and the second antenna do not reduce the radiation power;

[0093] Step 208, judge whether the distance between the SAR sensor and the user detected by the electronic device is less than n2 and greater than n1;

[0094] If yes, the radiated power of the first antenna and the second antenna is reduced to m1 in step 210.

[0095] In step 212, it is determined whether the distance between the user and the electronic device detected by the SAR sensor is less than n1.

[0096] If yes, the radiated power of the first antenna and the second antenna is reduced to m2, and the switch between the two antennas is turned off in step 214.

[0097] In this embodiment, the adjacent connection of multiple antenna poles is achieved by setting an adjustment path of a switch in series with an inductor or a resistor between the first antenna pole and the second antenna pole. When the switch is turned off, the maximum distance that can be detected by the SAR sensor corresponds to the area of a single antenna pole; when the switch is turned on, the maximum distance that can be detected by the SAR sensor corresponds to the area of the connected antenna poles. The connection of multiple antenna poles improves the area of the antenna poles that can be detected by the SAR sensor and improves the detection distance.

[0098] By segmentally connecting adjacent antenna poles, when the user is far away from the electronic device, a long distance is detected, and the antenna radiation frequency is not reduced, which can ensure the performance of the antenna. When the user approaches the electronic device, the connected antenna poles are disconnected in stages, and multiple distance detection is achieved. By controlling the number of connected antenna poles, the distance threshold that can be detected by the SAR sensor is controlled, and the performance of the antenna is improved. A corresponding radiation frequency threshold is set for each detection distance, and then the antenna radiation frequency is gradually reduced, which can reduce the radiation to the user on the premise of optimizing the performance of the antenna. Moreover, when the user is close to the electronic device, the switches are all turned off, which can minimize the mutual interference between the two antennas.

[0099] In other embodiments, the first antenna can be disconnected from the first detection channel 21, and the second antenna can be connected to the second detection channel 22, so that the SAR sensor can detect the voltage signal change of the second antenna pole through the second detection channel by turning off and turning on the switch, determine the distance n3 of the human body close to the electronic device, or simultaneously detect the voltage signal change of the first antenna pole and the second antenna pole through the second detection channel, determine the distance n4 of the human body close to the electronic device, n4>n3.

[0100] In one embodiment, the switch is a temperature control switch for detecting the temperature of the electronic device and turning off or turning on according to the temperature.

[0101] When the switch is open, the first antenna pole piece and the second antenna pole piece are in an isolated state, the SAR sensor detects the signal of the first antenna pole piece through the first detection channel to determine a first capacitance of the first antenna pole piece, and the SAR sensor detects the signal of the second antenna pole piece through the second detection channel to determine a second capacitance of the second antenna pole piece;

[0102] When the switch is closed, the first antenna pole piece and the second antenna pole piece are in a connected state, the SAR sensor detects the signal of the first antenna pole piece and the signal of the second antenna pole piece through the first detection channel to determine a third capacitance corresponding to the signal of the first antenna pole piece and the signal of the second antenna pole piece, or the SAR sensor detects the signal of the first antenna pole piece and the signal of the second antenna pole piece through the second detection channel to determine the third capacitance corresponding to the signal of the first antenna pole piece and the signal of the second antenna pole piece, and the first detection channel is in a high resistance state.

[0103] Reference will now be made to Figure 7 , Figure 7 is a circuit structure diagram of an electronic device of a fourth embodiment of the present application.

[0104] In the present embodiment, the adjustment path 10 includes two inductors and a switch connected in series between the two inductors. Two adjacent first antennas and second antennas are connected through the two inductors, and a switch is connected in series between the two inductors. The fourth embodiment is different from the third embodiment in that the switch is a temperature control switch. As described above in formula (1), the capacitance of the antenna pole piece is proportional to the area of the antenna pole piece.

[0105] When the temperature control switch is open, the SAR sensor can detect the capacitance of the first antenna pole piece and the capacitance of the second antenna pole piece through the corresponding detection channels respectively; when the switch is closed, the SAR sensor detects the sum of the capacitances of the first antenna pole piece and the second antenna pole piece through the normally operating detection channels.

[0106] As can be seen from the above formula (1), the capacitance determined by the SAR sensor is related to the antenna area. However, when the temperature of the mainboard of the actual electronic device rises, the dielectric constant ε will increase, resulting in an increase in the actual capacitance C. If the temperature of the mainboard is high, it will cause an error report when the actual capacitance exceeds the fixed upper limit value of the SAR sensor. The capacitance increase caused by the actual temperature rise does not need to be reported as an error, so the area of the antenna pole piece can be expanded to increase the detectable capacitance of the SAR sensor, thereby avoiding false reporting of the SAR sensor.

[0107] Next, the working principle of the electronic device of the fourth embodiment of the present application will be described in conjunction with the embodiments of the present application. Figure 8 Next, the working principle of the electronic device of the fourth embodiment of the present application will be described in conjunction with the embodiments of the present application.

[0108] Step 302, determining whether the temperature threshold t is lower than the temperature threshold t.

[0109] Step 304, if yes, the temperature control switch is opened, for example, only the first antenna pole piece is used to detect the capacitance, and the second antenna pole piece is not used to compensate the detected capacitance.

[0110] Step 306, determining whether the temperature threshold t is higher than the temperature threshold t.

[0111] Step 308, if yes, the temperature control switch is closed, at this time, the second antenna pole piece is used to supplement the capacitance, and the first antenna pole piece and the second antenna pole piece are used to detect the capacitance, so as to improve the detectable capacitance.

[0112] In this embodiment, by connecting the antenna pole piece in sections, when the temperature of the electronic device rises, the detection capacitance range can be improved, and the SAR sensor will not directly report a false alarm state.

[0113] The SAR sensor and the module of the electronic device for processing the antenna pole piece to transmit and receive radio frequency signals share the antenna pole piece, so an isolation module needs to be arranged between the SAR sensor and the antenna pole piece to avoid mutual interference between the SAR sensor and other modules sharing the antenna pole piece.

[0114] In one embodiment, the first detection channel includes a first isolation module, a first end of the first isolation module is connected with the SAR sensor, a second end of the first isolation module is connected with the first antenna pole piece, and the first antenna pole piece is connected with the second antenna pole piece.

[0115] As shown in the embodiments of Figure 1 , Figure 2 , Figure 5 and Figure 7 , the first detection channel 21 includes a first isolation module, and the first isolation module corresponds to the resistance R, the inductance L and the capacitance CAP included in the first detection channel 21.

[0116] In the case that the second detection channel is not disconnected from the second antenna pole piece, the second detection channel 22 includes a second isolation module, and the second isolation module corresponds to the resistance R, the inductance L and the capacitance CAP included in the first detection channel.

[0117] In another embodiment, the first detection channel includes a second isolation module and a third isolation module, a first end of the second isolation module is connected with the SAR sensor, a second end of the second isolation module is connected with the first antenna pole piece, a first end of the third isolation module is connected with the SAR sensor, and a second end of the third isolation module is connected with the second antenna pole piece.

[0118] In this embodiment, the plurality of antenna elements can be connected to the same detection channel through the isolation module.

[0119] Optionally, the second isolation module includes a first resistor, a first inductor and a first capacitor, a first end of the first resistor is connected with the SAR sensor, a second end of the first resistor is connected with a first end of the first inductor, a second end of the first inductor is connected with a first end of the first capacitor and the first antenna element, and a second end of the first capacitor is grounded.

[0120] The third isolation module includes the first resistor, a second inductor and a second capacitor, a first end of the second inductor is connected with a second end of the second resistor, a second end of the second inductor is connected with a first end of the second capacitor and the second antenna element, and a second end of the second capacitor is grounded.

[0121] Reference Figure 9 , Figure 9 is a circuit structure diagram of an electronic device of the fifth embodiment of the present application.

[0122] As Figure 9 shown, the second isolation module 23 includes a resistor R, an inductor L and a capacitor CAP, and the first antenna element is connected to the corresponding inductor L and capacitor CAP through an interface Con. The third isolation module 24 includes an inductor L and a capacitor CAP, and the second antenna element is connected to the corresponding inductor L and capacitor CAP through an interface Con.

[0123] That is, the first antenna element and the second antenna element are connected correspondingly at the inductor L of the isolation module.

[0124] In this embodiment, the two antenna elements are connected at the input end of the inductor L. The area of the antenna element is expanded, and the detection distance of the SAR sensor is also correspondingly improved. The electronic device can detect the user at a farther distance, and when the user is not close to the electronic device, the antenna can improve the transmission power and improve the performance of the antenna.

[0125] Optionally, the second isolation module includes a first resistor, a first inductor and a first capacitor, a first end of the first resistor is connected with the SAR sensor, a second end of the first resistor is connected with a first end of the first inductor, a second end of the first inductor is connected with a first end of the first capacitor and the first antenna element, and a second end of the first capacitor is grounded.

[0126] The third isolation module includes a second resistor, a second inductor and a second capacitor, a first end of the second resistor is connected with the SAR sensor, a second end of the second resistor is connected with a first end of the second inductor, a second end of the second inductor is connected with a first end of the second capacitor and the second antenna pole piece, and a second end of the second capacitor is grounded.

[0127] Reference Figure 10 , Figure 10 is a circuit structure diagram of an electronic device of the sixth embodiment of the present application.

[0128] As Figure 10 shown, the second isolation module 23 includes a resistor R, an inductor L and a capacitor CAP, and the first antenna pole piece is connected to the corresponding inductor L and capacitor CAP through an interface Con. The third isolation module 24 includes a resistor R, an inductor L and a capacitor CAP, and the second antenna pole piece is connected to the corresponding inductor L and capacitor CAP through an interface Con.

[0129] That is, the first antenna pole piece and the second antenna pole piece are connected at the isolation module and the detection channel port.

[0130] In this embodiment, the two antenna pole pieces are directly connected at the detection channel port of the SAR sensor. The area of the antenna pole piece is expanded, and the detection distance of the SAR sensor is also correspondingly improved. The electronic device can detect the user at a farther distance, and when the user is not close to the electronic device, the antenna can improve the radiation power and improve the performance of the antenna.

[0131] In the embodiment of the present application, the electronic device includes a SAR sensor, a first antenna pole piece and a second antenna pole piece, the SAR sensor includes a first detection channel and a second detection channel; the first antenna pole piece is connected with the SAR sensor through the first detection channel, the second antenna pole piece is connected with the SAR sensor through the second detection channel, and the SAR sensor determines the distance between the electronic device and the human body through the signals of the first antenna pole piece and / or the second antenna pole piece; wherein an adjustment passage is arranged between the first antenna pole piece and the second antenna pole piece, and the adjustment passage is used to adjust the connection state of the first antenna pole piece and the second antenna pole piece, so that multiple antenna pole pieces can be connected adjacent to each other, the area of the antenna pole piece of the electronic device is expanded, and thus the limit detection distance of the SAR sensor to the human body can be correspondingly improved according to the area of the connected multiple antenna pole pieces. The electronic device can detect the user at a farther distance, and when the user is not close to the electronic device, the radiation power of the antenna can be improved, and the performance of the antenna can be improved. When the user is close to the electronic device, the radiation power of the antenna is reduced, and the radiation to the user is reduced.

[0132] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the method and apparatus of the present application can be carried out by more than one process, method, article, or apparatus either simultaneously, concurrently, or with intervening action that are carried out at the same time, either in a simultaneous fashion or in a fashion that is interleaved in time. For example, the described methods can be performed in a different order from that described, and / or various steps can be combined or omitted, and / or additional steps can be added, without departing from the scope of the present application. Also, features described with respect to certain examples can be combined in other examples.

[0133] From the above description of the embodiments, it is apparent that the above-mentioned method can be realized by means of software and necessary universal hardware platform, of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solution of the present application can be embodied in the form of computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a plurality of instructions for making a terminal (which can be a mobile phone, computer, server, or network equipment, etc.) execute the method described in various embodiments of the present application.

[0134] The embodiments of the present application are described above in conjunction with the drawings, but the present application is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims.

Claims

1. An electronic device, comprising: The electronic device comprises: a SAR sensor comprising a first detection channel and a second detection channel; a first antenna pole and a second antenna pole, the first antenna pole being connected to the SAR sensor through the first detection channel, and the second antenna pole being connected to the SAR sensor through the second detection channel, the SAR sensor determining the distance between the electronic device and a human body through signals of the first antenna pole and / or the second antenna pole; wherein an adjusting path is arranged between the first antenna pole and the second antenna pole, and the adjusting path comprises a switch; when the switch is open, the first antenna pole and the second antenna pole are in an isolated state, the SAR sensor detects signals of the first antenna pole through the first detection channel to determine a first distance between the electronic device and a human body, or the SAR sensor detects signals of the second antenna pole through the second detection channel to determine a second distance between the electronic device and a human body; when the switch is closed, the first antenna pole and the second antenna pole are in a connected state, the SAR sensor detects signals of the first antenna pole and signals of the second antenna pole through the first detection channel to determine a third distance between the electronic device and a human body, and the second detection channel is in a high resistance state, or the SAR sensor detects signals of the first antenna pole and signals of the second antenna pole through the second detection channel to determine the third distance between the electronic device and a human body, and the first detection channel is in a high resistance state.

2. The electronic device according to claim 1, wherein: the adjusting path comprises an inductor or a resistor.

3. The electronic device of claim 2, wherein, the switch is connected in series with the inductor; or the switch is connected in series with the resistor.

4. The electronic device of claim 1, wherein, the switch is a temperature control switch, which is used to detect the temperature of the electronic device and open or close according to the temperature, when the switch is open, the first antenna pole and the second antenna pole are in an isolated state, the SAR sensor detects signals of the first antenna pole through the first detection channel to determine a first capacitance of the first antenna pole, and the SAR sensor detects signals of the second antenna pole through the second detection channel to determine a second capacitance of the second antenna pole; when the switch is closed, the first antenna pole and the second antenna pole are in a connected state, the SAR sensor detects signals of the first antenna pole and signals of the second antenna pole through the first detection channel to determine a third capacitance corresponding to the signals of the first antenna pole and the second antenna pole, and the second detection channel is in a high resistance state, or the SAR sensor detects signals of the first antenna pole and signals of the second antenna pole through the second detection channel to determine the third capacitance corresponding to the signals of the first antenna pole and the second antenna pole, and the first detection channel is in a high resistance state.

5. The electronic device of claim 1 or 4, wherein, the first antenna pole and the second antenna pole have different areas.

6. The electronic device of claim 1, wherein, the first detection channel comprises a first isolation module, The first end of the first isolation module is connected with the SAR sensor, and the second end of the first isolation module is connected with the first antenna pole piece.

7. The electronic device of claim 1, wherein, The first detection channel comprises a second isolation module and a third isolation module, The first end of the second isolation module is connected with the SAR sensor, and the second end of the second isolation module is connected with the first antenna pole piece. The first end of the third isolation module is connected with the SAR sensor, and the second end of the third isolation module is connected with the second antenna pole piece.

8. The electronic device of claim 7, wherein, The second isolation module comprises a first resistor, a first inductor and a first capacitor, the first end of the first resistor is connected with the SAR sensor, the second end of the first resistor is connected with the first end of the first inductor, the second end of the first inductor is connected with the first end of the first capacitor and the first antenna pole piece, and the second end of the first capacitor is grounded. The third isolation module comprises the first resistor, a second inductor and a second capacitor, the first end of the second inductor is connected with the second end of the first resistor, the second end of the second inductor is connected with the first end of the second capacitor and the second antenna pole piece, and the second end of the second capacitor is grounded.

9. The electronic device of claim 7, wherein, The second isolation module comprises a first resistor, a first inductor and a first capacitor, the first end of the first resistor is connected with the SAR sensor, the second end of the first resistor is connected with the first end of the first inductor, the second end of the first inductor is connected with the first end of the first capacitor and the first antenna pole piece, and the second end of the first capacitor is grounded. The third isolation module comprises a second resistor, a second inductor and a second capacitor, the first end of the second resistor is connected with the SAR sensor, the second end of the second resistor is connected with the first end of the second inductor, the second end of the second inductor is connected with the first end of the second capacitor and the second antenna pole piece, and the second end of the second capacitor is grounded.

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