Antenna detection module, electronic equipment and antenna transmitting power control method

Abstract

The invention discloses an antenna detection module, electronic equipment and an antenna transmitting power control method, and belongs to the technical field of communication. The antenna detection module comprises an antenna radiator, a metal piece, a self-capacitance detection module and a mutual capacitance detection module. The antenna radiator and the metal piece are arranged at an interval; the self-capacitance detection module is electrically connected with the antenna radiator, and the self-capacitance detection module is used for detecting the capacitance of the antenna radiator; a first end of the mutual capacitance detection module is electrically connected with the antenna radiator, a second end of the mutual capacitance detection module is electrically connected with the metal piece, and the mutual capacitance detection module is used for detecting mutual capacitance between the antenna radiator and the metal piece; when the capacitance of the antenna radiator is larger than or equal to a first threshold value, the mutual capacitance detection module is in a starting state, and the transmitting power of the antenna radiator is smaller than or equal to first power; and when the mutual capacitance between the antenna radiator and the metal piece is smaller than or equal to a second threshold value, the transmitting power of the antenna radiator is smaller than or equal to second power.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to an antenna detection module, an electronic device and an antenna transmission power control method. Background Art

[0002] In the field of communications, higher antenna transmission power can make the signal transmission distance longer, and it can also enhance the signal's anti-interference ability and ensure signal quality. However, too high antenna transmission power will cause electromagnetic radiation, which will cause potential harm to the surrounding environment and human health.

[0003] In the related art, a capacitive sensor (P-sensor) is used to detect the capacitance of a transmitting antenna, and whether a human body is close to the transmitting antenna is determined based on the capacitance. When a human body is detected close to the transmitting antenna, the transmitting power of the transmitting antenna is reduced to reduce the specific absorption ratio (SAR) of the transmitting antenna.

[0004] However, in the related art, when any object with a high dielectric constant approaches the transmitting antenna, the detection capacitance of the P-sensor will increase. As a result, when the electronic device is placed near objects such as a desk, bed, or handbag, it may misjudge that the human body is close to the transmitting antenna on the electronic device and reduce the transmitting power of the transmitting antenna.

[0005] In addition, even when a human body is close to the transmitting antenna, there are scenarios where different parts of the human body are close to the transmitting antenna, such as extremities, body, head, etc. In scenarios where different parts of the human body are close to the transmitting antenna, there are different SAR value requirements. Since the P-sensor determines the proximity of an object by the increase in the inductive capacitance, and different contact areas will have different inductive capacitances, the P-sensor in the related art cannot accurately distinguish between various scenarios. It can only reduce the transmitting power of the transmitting antenna according to the most stringent SAR value when the P-sensor detects that a human body / object is close to the transmitting antenna, so as to meet the SAR value requirements in various scenarios. For example, when the extremities of the human body are close to the transmitting antenna by 10mm, the transmitting power of the transmitting antenna is reduced according to the SAR value requirement of the human body being close to the transmitting antenna by 0mm.

[0006] In summary, the P-sensor capacitance detection solution in the related art has the problem of inaccurate detection results. Summary of the invention

[0007] The purpose of the embodiments of the present application is to provide an antenna detection module, an electronic device and an antenna transmission power control method, which can further use the mutual capacitance detection module to detect whether there is a human body contacting the transmitting antenna based on the P-sensor detecting that there is a human body / object approaching the transmitting antenna, and can accurately detect whether a human body is approaching or contacting the transmitting antenna.

[0008] In a first aspect, an embodiment of the present application provides an antenna detection module, the antenna detection module comprising: an antenna radiator, a metal part, a self-capacitance detection module and a mutual capacitance detection module;

[0009] The antenna radiator is spaced apart from the metal member;

[0010] The self-capacitance detection module is electrically connected to the antenna radiator, and the self-capacitance detection module is used to detect the capacitance of the antenna radiator;

[0011] A first end of the mutual capacitance detection module is electrically connected to the antenna radiator, a second end of the mutual capacitance detection module is electrically connected to the metal piece, and the mutual capacitance detection module is used to detect the mutual capacitance between the antenna radiator and the metal piece;

[0012] Wherein, when the capacitance of the antenna radiator is greater than or equal to the first threshold, the mutual capacitance detection module is in an activated state, and the transmission power of the antenna radiator is less than or equal to the first power;

[0013] When the mutual capacitance between the antenna radiator and the metal member is less than or equal to a second threshold, the transmission power of the antenna radiator is less than or equal to a second power.

[0014] In a second aspect, an embodiment of the present application provides an electronic device, which includes the antenna detection module as described in the first aspect.

[0015] In a third aspect, an embodiment of the present application provides an antenna transmission power control method, which is applied to the antenna detection module as described in the first aspect, or to the electronic device as described in the second aspect, and the method includes:

[0016] When the capacitance of the antenna radiator is detected to be greater than or equal to a first threshold value by the self-capacitance detection module, it is determined that the distance between the human body and the antenna radiator is less than or equal to a first distance value, and the mutual capacitance detection module is started, and the transmission power of the antenna radiator is controlled to be less than or equal to a first power;

[0017] When the mutual capacitance detection module detects that the mutual capacitance between the antenna radiator and the metal part is less than or equal to a second threshold, it is determined that a human body is in contact with the antenna radiator, and the transmission power of the antenna radiator is controlled to be less than or equal to a second power.

[0018] In the embodiment of the present application, the antenna detection module includes: an antenna radiator, a metal part, a self-capacitance detection module and a mutual capacitance detection module; by detecting the change value of the induced capacitance of the antenna radiator through the self-capacitance detection module, it can be reflected whether a human body or other objects with a large dielectric constant are close to the antenna radiator; by detecting the change value of the mutual capacitance between the antenna radiator and the metal part through the mutual capacitance detection module, it can be reflected whether a human body is in contact with the antenna radiator. Compared with the P-sensor in the related art, which can neither accurately detect the distance between the human body or other objects with a large dielectric constant and the antenna radiator, nor distinguish whether the object close to the antenna radiator is a human body or other objects with a large dielectric constant, the embodiment of the present application can at least detect whether the person in contact with the antenna radiator is a human body through the mutual capacitance detection module, and can also detect whether the human body is in contact with the antenna radiator or not through the mutual capacitance detection module and the self-capacitance detection module. In this way, various scenarios in which the human body approaches or contacts the antenna radiator can be distinguished, and the corresponding antenna transmission power can be set for each scenario, so as to improve the communication performance of the antenna as much as possible while reducing the impact of SAR on human health in various scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the circuit structure diagrams of the antenna detection module provided in the embodiment of the present application;

[0020] Figure 2 This is the second circuit structure diagram of the antenna detection module provided in the embodiment of the present application;

[0021] Figure 3 This is the third circuit structure diagram of the antenna detection module provided in the embodiment of the present application;

[0022] Figure 4 This is the fourth circuit structure diagram of the antenna detection module provided in the embodiment of the present application;

[0023] Figure 5 It is a structural schematic diagram of an antenna detection module provided in an electronic device according to an embodiment of the present application;

[0024] Figure 6 It is a flow chart of the antenna transmission power control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0026] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0027] In order to reduce the impact of antenna radiation on human health, it is necessary to reduce the antenna's transmission power when the user's body touches the electronic device or the antenna. In addition, on the basis of ensuring human health, it is also necessary to make the antenna's transmission power meet communication requirements as much as possible.

[0028] Based on the above purpose, in different regions, different SAR value standards are set for various scenarios where the human body is close to or in contact with the antenna radiator to regulate the radiation power of the antenna on the electronic device, so that the SAR value in a certain scenario where the human body is close to or in contact with the antenna radiator is lower than the SAR value standard corresponding to the scenario where the human body is close to or in contact with the antenna radiator.

[0029] For example, as shown in Table 1 below, different regions or countries may have different requirements for the SAR value standards for the three scenarios of head SAR, limb SAR, and body SAR:

[0030] Table 1

[0031]

[0032]

[0033] As shown in Table 1 above, different scenarios such as limb SAR and body SAR are distinguished by detecting the distance between the human body and the antenna radiator, and head SAR can be determined by detecting the handset mode of the electronic device. However, the P-sensor in the related art cannot accurately detect the distance between the human body and the antenna radiator, and cannot even distinguish whether the human body is close to the antenna radiator or an object with a larger dielectric constant is close to the antenna radiator.

[0034] The working principle of P-sensor in related technology is described as follows:

[0035] After the P-sensor applies an excitation signal to the metal conductor (electrode), a free electric field is formed around the metal conductor. This free electric field is coupled with other conductive materials around it to generate an environmental capacitance Cs; this capacitance determines the offset value of the capacitance of the metal conductor.

[0036] When a finger approaches a metal conductor, the finger is polarized in the electric field, forming an inductive capacitance Ch, which is superimposed on the original environmental capacitance Cs; the size of the capacitance determines the size of the difference (diff) value. Finally, when the diff value is greater than or equal to the preset threshold value, it can be determined that the distance between the human body and the metal conductor is less than or equal to the distance corresponding to the preset threshold value.

[0037] However, since the P-sensor determines the proximity of an object by detecting the increase in the inductive capacitance Ch, on the one hand, when an object with a large dielectric constant approaches the electrode of the P-sensor, it can also change the inductive capacitance of the electrode. Therefore, the P-sensor cannot distinguish whether the object approaching the electrode is an object or a human body. On the other hand, the inductive capacitance Ch is not only related to the proximity of the object, but also to the area of ​​the object. Therefore, it is difficult to define whether an object is close to the inductive antenna by setting a fixed threshold value. Therefore, in the related art, the sensing distance (threshold value) of the P-sensor is set to be greater than the test distance specified in the SAR value standard, and once the P-sensor detects that the sensing capacitance Ch reaches the threshold value, it is determined that an object is approaching, and the minimum transmission power is selected from different power levels that meet the different distance tests specified in the SAR value standard for transmission. For example, if the test distance (threshold value) of the P-sensor is set to be greater than 5 mm according to the SAR value standard of region or country B in Table 1 above, and once the P-sensor detects that the sensing capacitance Ch reaches the threshold value, the transmission power of the antenna is reduced according to the SAR value requirement of <2.0 W / Kg. This method has a certain sacrifice on the antenna performance.

[0038] In the embodiment of the present application, on the basis of detecting the capacitance of the antenna radiator through the self-capacitance detection module, the mutual capacitance between the antenna radiator and the metal part is also detected through the mutual capacitance detection module, so as to distinguish the scenes of extremity approaching, body approaching, etc. by combining the detection results of the self-capacitance detection module and the mutual capacitance detection module. Subsequently, the transmission power of the antenna can be reduced according to the actual detected scene.

[0039] The antenna detection module, electronic device and antenna transmission power control method provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0040] See also Figure 1, the antenna detection module provided in the embodiment of the present application includes: an antenna radiator 10, a metal part 20, a self-capacitance detection module 30 and a mutual capacitance detection module 40;

[0041] The antenna radiator 10 and the metal member 20 are spaced apart from each other;

[0042] The self-capacitance detection module 30 is electrically connected to the antenna radiator 10, and the self-capacitance detection module 30 is used to detect the capacitance of the antenna radiator 10;

[0043] A first end of the mutual capacitance detection module 40 is electrically connected to the antenna radiator 10, and a second end of the mutual capacitance detection module 40 is electrically connected to the metal part 20. The mutual capacitance detection module 40 is used to detect the mutual capacitance between the antenna radiator 10 and the metal part 20;

[0044] Wherein, when the capacitance of the antenna radiator 10 is greater than or equal to the first threshold, the mutual capacitance detection module 40 is in the startup state, and the transmission power of the antenna radiator 10 is less than or equal to the first power;

[0045] When the mutual capacitance between the antenna radiator 10 and the metal member 20 is less than or equal to the second threshold, the transmission power of the antenna radiator 10 is less than or equal to the second power.

[0046] In some embodiments, the self-capacitance detection module 30 may include a P-sensor. In this case, the antenna radiator 10 serves as an electrode of the P-sensor so that the P-sensor transmits an excitation signal to the antenna radiator 10 to detect the capacitance of the antenna radiator 10 based on the excitation signal.

[0047] In some embodiments, the capacitance of the antenna radiator 10 includes the environmental capacitance near the antenna radiator 10 and the inductive capacitance on the antenna radiator 10 when an external object or a human body approaches the antenna radiator 10 .

[0048] The fact that an external object or a human body is close to the antenna radiator 10 may indicate that the distance between the external object or the human body and the antenna radiator 10 is less than or equal to the test distance of the P-sensor.

[0049] It is worth mentioning that the environmental capacitance near the antenna radiator 10 is almost fixed, and the capacitance of the antenna radiator 10 is greater than or equal to the first threshold value. The increment of the induced capacitance on the antenna radiator 10 may be greater than or equal to the first preset threshold value, wherein the first preset threshold value may be pre-set, reflecting the increment of the induced capacitance on the antenna radiator 10 when a human body is close to the antenna radiator 10 compared to when no human body is close to the antenna radiator 10.

[0050] It should be noted that the object that causes the increase in the induced capacitance of the antenna radiator 10 may be a human body near the antenna radiator 10, or an object with a large dielectric constant near the antenna radiator 10. For the sake of convenience, in the embodiments of the present application, an application scenario in which a human body is close to the antenna radiator 10 is usually used as an example for illustration.

[0051] In some embodiments, the first threshold can be used to reflect that the distance between the human body and the antenna radiator 10 is less than or equal to the preset distance. For example, the test distance of the self-capacitance detection module 30 is set to at least one of 5mm, 10mm, 15mm, etc. through the first threshold.

[0052] Among them, when the test distance of the self-capacitance detection module 30 is at least two of the test distances of 5mm, 10mm, 15mm, etc., at least two first thresholds can be set so that the at least two first thresholds correspond one-to-one to the at least two test distances. When the self-capacitance detection module 30 detects that the capacitance of the antenna radiator 10 reaches a certain first threshold, the distance between the human body and the antenna radiator 10 can be determined according to the test distance corresponding to the first threshold, so as to determine whether it is a scene where the limbs are close to the antenna radiator 10 or a scene where the body is close to the antenna radiator 10, such as the test distance corresponding to the scene where the body is close to the antenna radiator 10 is 10mm, and the test distance corresponding to the scene where the limbs are close to the antenna radiator 10 is 5mm.

[0053] In some implementations, the test distance of the self-capacitance detection module 30 is positively correlated with the size of the antenna radiator 10 .

[0054] In some embodiments, the antenna radiator 10 and the metal member 20 are spaced apart, and the antenna radiator 10 can be electrically connected to the driving electrode of the mutual capacitance detection module 40, and the metal member 20 can be electrically connected to the sensing electrode of the mutual capacitance detection module 40. When the mutual capacitance detection module 40 provides an excitation signal to the antenna radiator 10, the metal member 20 can generate an induced electric field based on the coupling effect with the antenna radiator 10, thereby reducing the mutual capacitance between the metal member 20 and the antenna radiator 10. That is, the first end of the mutual capacitance detection module 40 is a transmitting end or a driving electrode, which is used to send an excitation signal for mutual capacitance detection to the antenna radiator 10, and the second end of the mutual capacitance detection module 40 is a receiving end or a sensing electrode, which is used to receive the sensing signal on the metal member 20.

[0055] Of course, in other embodiments, the second end of the mutual capacitance detection module 40 is a transmitting end or a driving electrode, which is used to send an excitation signal for mutual capacitance detection to the metal part 20, and the first end of the mutual capacitance detection module 40 is a receiving end or a sensing electrode, which is used to receive the sensing signal on the antenna radiator 10.

[0056] For ease of explanation, in the embodiment of the present application, the first end of the mutual capacitance detection module 40 is a transmitting end or a driving electrode, and the second end of the mutual capacitance detection module 40 is a receiving end or a sensing electrode. This is not a specific limitation.

[0057] In some embodiments, the distance between the metal part 20 and the antenna radiator 10 can be reduced as much as possible. For example, the distance between the metal part 20 and the antenna radiator 10 can be greater than 0 and less than 1 mm. In this way, the coupling degree between the metal part 20 and the antenna radiator 10 can be enhanced, so that the mutual capacitance detection module 40 can detect the mutual capacitance between the metal part 20 and the antenna radiator 10 by sending a smaller power excitation signal.

[0058] In some embodiments, Figure 1 As shown, the working principle of the mutual capacitance detection module 40 is as follows:

[0059] The mutual capacitance detection module 40 sends a rectangular excitation pulse to the antenna radiator 10 to activate the antenna radiator 10, and the mutual capacitance detection module 40 receives an induction signal on the metal member 20 to calculate the mutual capacitance between the antenna radiator 10 and the metal member 20 according to the induction signal. When a human body contacts the antenna radiator 10, the mutual capacitance between the antenna radiator 10 and the metal member 20 decreases, so that when the mutual capacitance detection module 40 detects that the mutual capacitance between the antenna radiator 10 and the metal member 20 decreases to less than or equal to the second threshold, it is determined that a human body contacts the antenna radiator 10.

[0060] It is worth mentioning that the mutual capacitance between the antenna radiator 10 and the metal part 20 is less than or equal to the second threshold value, and the reduction in the mutual capacitance between the antenna radiator 10 and the metal part 20 may be greater than or equal to the second preset threshold value, wherein the second preset threshold value may be pre-set, reflecting the reduction in the mutual capacitance between the antenna radiator 10 and the metal part 20 when a human body contacts the antenna radiator 10 compared to when no human body contacts the antenna radiator 10.

[0061] In some embodiments, the values ​​of the first power and the second power may be the same or different. In a specific application scenario, the values ​​of the first power and the second power may be set based on the SAR value standards of different regions or countries. For example: for the SAR value standard of region or country C in Table 1, since the SAR value standard of limb SAR is higher than the SAR value standard of Body SAR, the antenna transmission power when the user's limbs are detected approaching the antenna is greater than the antenna transmission power when the user's body is detected approaching the antenna.

[0062] In some embodiments, the first power is less than the second power, wherein the first power represents the radiation power of the antenna radiator 10 when the distance between the human body or object and the antenna radiator 10 is less than or equal to the test distance of the self-capacitance detection module 30 detected by the self-capacitance detection module 30; and the second power represents the radiation power of the antenna radiator 10 when the contact between the human body and the antenna radiator 10 is detected by the mutual capacitance detection module 40.

[0063] It is worth noting that in the related technology, since the P-sensor cannot accurately detect whether the human body is close to the antenna or touching the antenna, and cannot detect whether the human body is close to the antenna or an object with a larger dielectric constant is close to the antenna, when it is detected that the distance between the human body or object and the antenna is less than or equal to the test distance of the P-sensor, the antenna's radiation power is uniformly reduced according to the minimum SAR value standard, which will cause an unnecessary reduction in the antenna's transmission power and affect the antenna's communication performance.

[0064] However, in the embodiment of the present application, compared with the scenario where a human body or an object is close to the antenna radiator 10, the electromagnetic waves of the antenna radiator 10 have a greater impact on the human body when the human body contacts the antenna radiator 10. By setting the second power to be less than the first power, the radiation power of the antenna radiator 10 when the human body contacts the antenna radiator 10 can be further reduced, thereby further reducing the impact of the electromagnetic waves of the antenna radiator 10 on the human body. In addition, when no human body contacting the antenna radiator 10 is detected, if a human body or an object is detected close to the antenna radiator 10, the radiation power of the antenna radiator 10 can be appropriately increased while ensuring the user's physical safety, thereby improving the communication performance of the antenna module.

[0065] As an optional implementation, Figure 2 As shown, the antenna detection module provided in the embodiment of the present application further includes a power adjustment module 50;

[0066] The self-capacitance detection module 30 and the mutual capacitance detection module 40 are electrically connected to the power adjustment module 50 respectively;

[0067] The self-capacitance detection module 30 sends a first signal to the power adjustment module 50 when detecting that the capacitance of the antenna radiator 10 is greater than or equal to the first threshold;

[0068] The mutual capacitance detection module 40 sends a second signal to the power adjustment module 50 when detecting that the mutual capacitance between the antenna radiator 10 and the metal member 20 is less than or equal to the second threshold;

[0069] When the power adjustment module 50 receives the first signal but does not receive the second signal, the transmission power of the antenna radiator 10 is reduced to the first power; when the power adjustment module 50 receives the second signal, the transmission power of the antenna radiator 10 is reduced to the second power.

[0070] In some embodiments, the first signal may be a digital signal or an analog signal. For ease of explanation, the first signal is a digital signal as an example in the embodiments of the present application. For example, the digital signal emitted by the self-capacitance detection module 30 may be "0" or "1", where "0" indicates that the capacitance of the antenna radiator 10 detected by the self-capacitance detection module 30 is less than the first threshold value, that is, no human body is close to the antenna radiator 10; "1" indicates that the capacitance of the antenna radiator 10 detected by the self-capacitance detection module 30 is greater than or equal to the first threshold value, that is, a human body is close to the antenna radiator 10.

[0071] In some embodiments, the power adjustment module 50 may perform information processing on the received first signal and / or second signal to determine whether to reduce the transmit power of the antenna radiator 10 to the first power or the second power, or not to adjust the transmit power of the antenna radiator 10 .

[0072] In some embodiments, Figure 2 As shown, the self-capacitance detection module 30 includes a first analog front end (AnalogFront End, AFE) 31 and a first digital signal processing module 32, wherein the first AFE 31 is used to transmit an excitation signal to the electrode (i.e., the antenna radiator 10), and detect the capacitance value of the electrode, and transmit the analog signal corresponding to the detection result to the first digital signal processing module 32, and the first digital signal processing module 32 is used to generate a digital signal, i.e., a first signal, according to the analog signal sent by the first AFE 31.

[0073] In some embodiments, the second signal may be a digital signal or an analog signal. For ease of explanation, the second signal is taken as an example in the embodiments of the present application as a digital signal. For example, the digital signal emitted by the mutual capacitance detection module 40 may be "0" or "1", where "0" indicates that the mutual capacitance between the antenna radiator 10 and the metal part 20 detected by the mutual capacitance detection module 40 is greater than the second threshold, that is, no human body is close to the antenna radiator 10; "1" indicates that the mutual capacitance between the antenna radiator 10 and the metal part 20 detected by the mutual capacitance detection module 40 is less than or equal to the second threshold, that is, a human body is close to the antenna radiator 10.

[0074] In some embodiments, Figure 2As shown, the mutual capacitance detection module 40 includes a second analog front end (AnalogFront End, AFE) 41 and a second digital signal processing module 42, wherein the second AFE 41 is used to transmit an excitation signal to the electrode (i.e., the antenna radiator 10), and detect the capacitance value of the electrode, and transmit the analog signal corresponding to the detection result to the second digital signal processing module 42, and the second digital signal processing module 42 is used to generate a digital signal, i.e., a second signal, according to the analog signal sent by the second AFE 41.

[0075] In some implementations, the power adjustment module 50 may include an information processing and control module such as a CPU, which is not specifically limited herein.

[0076] In this embodiment, the detection results of the self-capacitance detection module 30 and the mutual capacitance detection module 40 can reflect different human body approach or contact scenarios, and the power adjustment module 50 can realize the reduction of the radiation power of the antenna radiator 10 according to the human body contact scenario according to different human body approach or contact scenarios. This can reduce the sacrifice of antenna performance while ensuring the electromagnetic wave radiation safety performance under various human body approach or contact scenarios.

[0077] As an optional implementation, Figure 2 As shown, the antenna detection module provided in the embodiment of the present application further includes: a first inductor 61 and a second inductor 62;

[0078] The self-capacitance detection module 30 is electrically connected to the antenna radiator 10 via the first inductor 61;

[0079] The first end of the mutual capacitance detection module 40 is electrically connected to the antenna radiator 10 through the second inductor 62;

[0080] The frequency of the excitation signal used by the self-capacitance detection module 30 and the mutual-capacitance detection module 40 is lower than the operating frequency of the antenna radiator 10 .

[0081] In this embodiment, by utilizing the characteristic of inductance that can pass low frequencies and block high frequencies, the high-frequency signal on the antenna radiator 10 can be prevented from being transmitted to the self-capacitance detection module 30 and the mutual capacitance detection module 40 through the inductance, thereby improving the detection accuracy of the self-capacitance detection module 30 and the mutual capacitance detection module 40 and reducing the interference of the self-capacitance detection module 30 and the mutual capacitance detection module 40 on the antenna radiator 10.

[0082] It is worth mentioning that, in addition to the above-mentioned inductor, other filtering circuits or isolation circuits may also be used to prevent high-frequency signals on the antenna radiator 10 from being transmitted to the self-capacitance detection module 30 and the mutual capacitance detection module 40, which is not specifically limited here.

[0083] As an optional implementation, Figure 2 As shown, the antenna detection module provided in the embodiment of the present application further includes: a third inductor 63 , and the second end of the mutual capacitance detection module 40 is electrically connected to the metal part 20 through the third inductor 63 .

[0084] In this embodiment, by utilizing the property of inductance that can pass low frequencies and block high frequencies, the high-frequency coupling signal generated by the coupling of the metal part 20 with the high-frequency signal on the antenna radiator 10 cannot be transmitted to the mutual capacitance detection module 40 through the inductor. In this way, the frequency point of the metal part 20 can be moved out of the working frequency band of the antenna to avoid affecting the antenna radiation performance.

[0085] In some embodiments, the size or shape of the metal part 20 can be designed so that the resonant frequency of the metal part 20 does not overlap with the operating frequency band of the antenna radiator 10. This can also move the frequency point of the metal part 20 out of the operating frequency band of the antenna to avoid affecting the antenna radiation performance.

[0086] As an optional implementation, Figure 3 As shown, the antenna detection module provided in the embodiment of the present application further includes: a combiner 70;

[0087] The self-capacitance detection module 30 and the mutual capacitance detection module 40 are electrically connected to the antenna radiator 10 through different filtering paths in the combiner 70;

[0088] The self-capacitance detection module 30 and the mutual-capacitance detection module 40 respectively use excitation signals of different frequencies to perform capacitance detection.

[0089] For example, assuming that the self-capacitance detection module 30 uses a 100KHz excitation signal to detect the capacitance of the antenna radiator 10; the mutual capacitance detection module 40 uses a 1MHz excitation signal to detect the mutual capacitance between the antenna radiator 10 and the metal part 20, the self-capacitance detection module 30 is electrically connected to the antenna radiator 10 through the low-pass filter circuit in the combiner 70, so that the 100KHz excitation signal sent by the self-capacitance detection module 30 can be transmitted to the antenna radiator 10, and the 1MHz high-frequency excitation signal on the antenna radiator 10 cannot be transmitted to the self-capacitance detection module 30; the mutual capacitance detection module 40 is electrically connected to the antenna radiator 10 through the high-pass filter circuit in the combiner 70, so that the 100KHz excitation signal sent by the self-capacitance detection module 30 can be transmitted to the antenna radiator 10, and the 100KHz low-frequency excitation signal on the antenna radiator 10 cannot be transmitted to the mutual capacitance detection module 40. Thus, the self-capacitance detection module 30 and the mutual capacitance detection module 40 set in the same capacitance detection circuit 100 can work independently.

[0090] It should be noted that the self-capacitance detection module 30 uses a 100KHz excitation signal to detect the capacitance of the antenna radiator 10, and the mutual capacitance detection module 40 uses a 1MHz excitation signal to detect the mutual capacitance between the antenna radiator 10 and the metal part 20. This is only an example. The frequencies of the excitation signals used by the self-capacitance detection module 30 and the mutual capacitance detection module 40 can be other frequencies. It is only necessary to satisfy that the self-capacitance detection module 30 and the mutual capacitance detection module 40 use excitation signals of different frequencies. No specific limitation is made here.

[0091] It should be noted that when the self-capacitance detection module 30 and the mutual capacitance detection module 40 are arranged in the same capacitance detection circuit 100, the first inductor 61 and the second inductor 62 in the previous embodiment can also be combined into a target inductor 60, which can allow the excitation signals emitted by the self-capacitance detection module 30 and the mutual capacitance detection module 40 to pass through, and prevent the antenna signal on the antenna radiator 10 from passing through.

[0092] In this embodiment, the self-capacitance detection module 30 and the mutual capacitance detection module 40 can be modules in the same capacitance detection circuit 100, for example: an integrated circuit (IC) that integrates the self-capacitance detection and mutual capacitance detection functions, and the same capacitance detection circuit 100 can send two excitation signals of different frequencies to respectively detect the self-capacitance of the antenna radiator 10 and the mutual capacitance between the antenna radiator 10 and the metal part 200. In this way, the structure of the antenna detection module can be simplified.

[0093] As an optional implementation, Figure 4 As shown, the number of antenna radiators 10 is N, the number of metal parts 20 is N, and N is an integer greater than 1;

[0094] The N metal parts 20 are arranged in one-to-one correspondence with the N antenna radiators 10;

[0095] The self-capacitance detection module 30 is electrically connected to the N antenna radiators 10, and / or the first end of the mutual capacitance detection module 40 is electrically connected to the N antenna radiators 10, and the second end of the mutual capacitance detection module 40 is electrically connected to the N metal parts 20;

[0096] The antenna detection module further includes: M fourth inductors 81 and M fifth inductors 82, where M is an integer greater than 1, and M is less than or equal to N;

[0097] The M fourth inductors 81 are respectively connected in series between any two antenna radiators 10 among the N antenna radiators 10;

[0098] The M fifth inductors 82 are respectively connected in series between any two metal members 20 among the N metal members 20 .

[0099] In some embodiments, N can be any integer greater than 1, and M can be any integer greater than 1, for example, N is equal to any integer such as 2, 3, 4, 5, and M can be any integer such as 2, 3, 4, 5, etc.

[0100] In some embodiments, M is equal to (N-1). Figure 4 As shown in FIG. 8 , a fourth inductor 81 is cascaded between the two antenna radiators 10 .

[0101] In other embodiments, M may be greater than or equal to N.

[0102] For example, assuming that N is equal to 3, any two antenna radiators 10 can be paired to obtain three types of antenna radiator pairs. In this case, a fourth inductor 81 can be provided for each type of antenna radiator pair.

[0103] For another example, at least two fourth inductors 81 may be cascaded between any two antenna radiators 10 .

[0104] Similarly, the number of the fourth inductors 81 may be equal to the number of the metal parts 20 minus 1, or may be greater than or equal to the number of the metal parts 20 .

[0105] It should be noted that, for the sake of convenience, in the embodiments of the present application, N is equal to 2 and M is equal to 1, which is taken as an example for illustration, and does not constitute a specific limitation herein.

[0106] It is worth mentioning that the function of the fourth inductor 81 is to allow the excitation signal and the induction signal of the self-capacitance detection module 30 and the mutual capacitance detection module 40 to pass through, and to prevent the signals of the N antenna radiators 10 from passing through. In this way, the coupling between the N antenna radiators 10 can be reduced and the antenna performance of the N antenna radiators 10 can be improved.

[0107] In addition, the function of the fifth inductor 82 is to allow the induction signal generated by the N metal parts 20 coupling the excitation signal sent by the mutual capacitance detection module 40 to pass through, and to prevent the induction signal generated by the N metal parts 20 coupling the signal in the antenna working frequency band from passing through. In this way, the influence of the N metal parts 20 on the antenna radiator 10 can be reduced, and the antenna performance of the N antenna radiators 10 can be improved.

[0108] In this embodiment, the same self-capacitance detection module 30 can be used to detect the self-capacitance of N antenna radiators 10, and / or the same mutual capacitance detection module 40 can be used to detect the mutual capacitance between N antenna radiators 10 and the corresponding metal parts 20, which can increase the number of antenna radiators 10 detected by the self-capacitance detection module 30 and / or the mutual capacitance detection module 40 without increasing the capacitance detection channels.

[0109] It should be noted that if Figure 4 In the illustrated embodiment, the self-capacitance detection module 30 is electrically connected to N antenna radiators 10 , and a first end of the mutual capacitance detection module 40 is electrically connected to the N antenna radiators 10 , and a second end of the mutual capacitance detection module 40 is electrically connected to N metal parts 20 .

[0110] However, in some embodiments, only the self-capacitance detection module 30 may be electrically connected to the N antenna radiators 10, and the mutual capacitance detection module 40 may be provided with multiple detection channels to detect the mutual capacitance between the N antenna radiators 10 and their respective corresponding metal parts 20 through the multiple detection channels.

[0111] In some other embodiments, only the first end of the mutual capacitance detection module 40 may be electrically connected to the N antenna radiators 10, and the second end of the mutual capacitance detection module 40 may be electrically connected to the N metal parts 20, while the self-capacitance detection module 30 may be provided with multiple detection channels to detect the self-capacitance of the N antenna radiators 10 through the multiple detection channels.

[0112] As an optional implementation, the number of antenna radiators 10 is N, the number of metal parts 20 is N, and N is an integer greater than 1;

[0113] The N metal parts 20 are arranged in one-to-one correspondence with the N antenna radiators 10;

[0114] The mutual capacitance detection module 40 includes L first ends and L second ends, the L first ends of the mutual capacitance detection module 40 are driving electrodes of the L first detection channels in the mutual capacitance detection module 40, the L second ends of the mutual capacitance detection module 40 are receiving ends of the L first detection channels in the mutual capacitance detection module 40, and L is an integer greater than 1;

[0115] The L first detection channels are electrically connected between N groups of metal pieces 20 and antenna radiators 10 arranged in pairs, respectively;

[0116] When the target first detection channel in the mutual capacitance detection module 40 detects that the mutual capacitance between the first target antenna radiator and the first target metal part is less than or equal to the second threshold, the transmission power of the first target antenna radiator is less than or equal to the second power;

[0117] Among them, the target first detection channel is any detection channel among the L first detection channels, the first target antenna radiator is an antenna radiator among the N antenna radiators 10 that is electrically connected to the target first detection channel, and the first target metal part is a metal part among the N metal parts 20 that is electrically connected to the target first detection channel.

[0118] In some embodiments, L can be any integer greater than 1, such as 2, 3, 4, etc.

[0119] In some embodiments, L may be equal to N. In this case, the first detection channel corresponds to the antenna radiator 10 one by one, that is, the mutual capacitance between different antenna radiators 10 and their corresponding metal parts 20 is detected through different first detection channels.

[0120] In other embodiments, L may be less than N. In this case, at least one first detection channel corresponds to at least two antenna radiators 10, that is, the mutual capacitance between at least two antenna radiators 10 and their corresponding metal parts 20 is detected through the same first detection channel.

[0121] In some other embodiments, L may be greater than N, in which case some of the first detection channels are used to perform a one-to-one connection or a one-to-many connection with the antenna radiator 10. For example, assuming that there are two antenna radiators 10, the mutual capacitance detection module 40 includes three first detection channels, one of which is electrically connected to the first antenna radiator 10 and the metal part 20 corresponding to the first antenna radiator 10; one of which is electrically connected to the second antenna radiator 10 and the metal part 20 corresponding to the second antenna radiator 10; and the last first detection channel may be electrically connected to at least one of the first antenna radiator 10 and the second antenna radiator 10, and the metal part 20 corresponding to at least one of the first antenna radiator 10 and the second antenna radiator 10, so as to realize redundant detection of the mutual capacitance between the two antenna radiators 10 and their respective corresponding metal parts 20, so as to improve the reliability of the detection result.

[0122] Different from the previous embodiment, in which the mutual capacitance detection module 40 detects the mutual capacitance between N antenna radiators 10 and their corresponding metal parts 20 through one detection channel, in this embodiment, multiple detection channels are set in the mutual capacitance detection module 40, and multiple detection channels are used to detect the mutual capacitance between N antenna radiators 10 and their corresponding metal parts 20.

[0123] In this embodiment, the mutual capacitance between different antenna radiators 10 and the corresponding metal parts 20 can be detected through different detection channels, so that the mutual capacitance between the different antenna radiators 10 and the corresponding metal parts 20 detected by each detection channel can be obtained, and then it can be independently determined whether the antenna radiator detected by each detection channel is touched by the human body.

[0124] In the previous embodiment, since the mutual capacitance between different antenna radiators 10 and the corresponding metal parts 20 is detected through the same detection channel, only a unified mutual capacitance detection result can be obtained, and multiple antenna radiators 10 can only be judged as a whole to determine whether they are touched by the human body.

[0125] For example: Assume that the mutual capacitance detection module 40 detects the mutual capacitance between two antenna radiators 10 and their respective corresponding metal parts 20 through a detection channel. If it is detected that the mutual capacitance between the two antenna radiators 10 and the two metal parts 20 is reduced to less than or equal to a preset threshold, it is determined that a human body is in contact with the two antenna radiators 10, but the actual situation may be that the human body only contacts one of the antenna radiators.

[0126] As an optional implementation, the number of antenna radiators 10 is N, the number of metal parts 20 is N, and N is an integer greater than 1;

[0127] The N metal parts 20 are arranged in one-to-one correspondence with the N antenna radiators 10;

[0128] The self-capacitance detection module 30 includes H second detection channels, where H is an integer greater than 1;

[0129] The N antenna radiators 10 are electrically connected to the N second detection channels of the self-capacitance detection module 30 respectively;

[0130] When the target second detection channel in the self-capacitance detection module 30 detects that the capacitance of the second target antenna radiator is greater than or equal to the first threshold, the transmission power of the second target antenna radiator is less than or equal to the first power;

[0131] The target second detection channel is any detection channel among the H second detection channels, and the second target antenna radiator is an antenna radiator among the N antenna radiators 10 that is electrically connected to the target second detection channel.

[0132] In some embodiments, H can be any integer greater than 1, such as 2, 3, 4, etc.

[0133] In some implementations, H may be equal to N. In this case, the second detection channel corresponds to the antenna radiator 10 one by one, that is, the self-capacitance of different antenna radiators 10 is detected through different second detection channels.

[0134] In other embodiments, H may be smaller than N. In this case, at least one second detection channel corresponds to at least two antenna radiators 10, that is, the self-capacitance of at least two antenna radiators 10 is detected through the same second detection channel.

[0135] In some other embodiments, H may be greater than N. In this case, some of the second detection channels are used to perform one-to-one connection or one-to-many connection with the antenna radiator 10. For example, assuming that there are two antenna radiators 10, the self-capacitance detection module 30 includes three second detection channels, one of which is electrically connected to the first antenna radiator 10; one second detection channel is electrically connected to the second antenna radiator 10; and the last second detection channel can be electrically connected to at least one of the first antenna radiator 10 and the second antenna radiator 10, so as to realize redundant detection of the self-capacitance of the two antenna radiators 10, so as to improve the reliability of the detection result.

[0136] Similar to the previous embodiment, in which the self-capacitance of different antenna radiators 10 can be detected through different detection channels in the mutual capacitance detection module 40, in the present embodiment, the self-capacitance of different antenna radiators 10 can be detected through different detection channels in the self-capacitance detection module 30, so as to independently determine whether a human body is approaching the antenna radiator 10 detected by each detection channel based on the detection results of each detection channel.

[0137] It should be noted that the antenna detection module provided in the embodiment of the present application may also include other conventional components in the antenna module, such as Figure 2 The antenna feed 101, antenna matching 102, isolation capacitor 103, etc. are shown in the figure. The antenna feed 101 is used to provide an excitation signal to the antenna radiator 10 to stimulate the antenna radiator 10 to radiate the signal; the antenna matching 102 is used to perform impedance matching on the antenna radiator 10 according to the working frequency band of the antenna; the isolation capacitor 103 is used to allow the high-frequency excitation signal provided by the antenna feed 101 to pass through, and prevent the low-frequency excitation signal provided by the self-capacitance detection module 30 and the mutual capacitance detection module 40 from passing through, so as to improve the anti-interference performance of the antenna module.

[0138] In some embodiments, the low-frequency excitation signal provided by the self-capacitance detection module 30 and the mutual capacitance detection module 40 in the embodiment of the present application may be a rectangular pulse excitation signal, the frequency of which is much lower than the excitation signal of the antenna module, thereby preventing the rectangular pulse excitation signal from passing through capacitor 103.

[0139] In the embodiment of the present application, the antenna detection module includes: an antenna radiator, a metal part, a self-capacitance detection module and a mutual capacitance detection module; by detecting the change value of the induced capacitance of the antenna radiator through the self-capacitance detection module, it can be reflected whether a human body or other objects with a large dielectric constant are close to the antenna radiator; by detecting the change value of the mutual capacitance between the antenna radiator and the metal part through the mutual capacitance detection module, it can be reflected whether a human body is in contact with the antenna radiator. Compared with the P-sensor in the related art, which can neither accurately detect the distance between the human body or other objects with a large dielectric constant and the antenna radiator, nor distinguish whether the object close to the antenna radiator is a human body or other objects with a large dielectric constant, the embodiment of the present application can at least detect whether the person in contact with the antenna radiator is a human body through the mutual capacitance detection module, and can also detect whether the human body is in contact with the antenna radiator or not through the mutual capacitance detection module and the self-capacitance detection module. In this way, various scenarios in which the human body approaches or contacts the antenna radiator can be distinguished, and the corresponding antenna transmission power can be set for each scenario, so as to improve the communication performance of the antenna as much as possible while reducing the impact of SAR on human health in various scenarios.

[0140] See also Figure 5 An embodiment of the present application also provides an electronic device, which includes any type of antenna detection module provided in the aforementioned embodiments of the present application, and the antenna radiator 10 in the antenna detection module is exposed on the surface of the electronic device.

[0141] In some embodiments, the electronic device may be a terminal or other device other than a terminal. For example, the electronic device may be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), etc. It may also be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiments of the present application.

[0142] In some embodiments, the antenna radiator 10 in the antenna detection module is exposed on the surface of the electronic device, and the antenna radiator 10 may be disposed on a metal frame 700 of the electronic device.

[0143] In other implementations, any position of the electronic device, such as the back cover, side, or front cover, may be exposed, which is not specifically limited here.

[0144] In this way, by exposing the antenna radiator 10 on the surface of the electronic device, the human body can come into contact with the antenna radiator 10 , thereby causing the mutual capacitance between the antenna radiator 10 and the corresponding metal member 20 to decrease.

[0145] In some embodiments, the metal component 20 in the antenna detection module is housed in the electronic device and is spaced apart from the antenna radiator 10 .

[0146] For example: Figure 5 As shown, when the antenna radiator 10 is disposed on a metal frame 700 of an electronic device, the metal component 20 is received in a housing of the electronic device and is disposed close to the antenna radiator 10 .

[0147] In the present embodiment, the metal part 20 is housed in the electronic device so that the human body cannot touch the metal part 20. This can prevent the problem of unclear change in the mutual capacitance between the antenna radiator 10 and the corresponding metal part 20 caused by the user's body touching the antenna radiator 10 and the corresponding metal part 20 at the same time, and can improve the reliability of the detection result of the mutual capacitance detection module 40.

[0148] The electronic device provided in the embodiment of the present application has any antenna detection module provided in the aforementioned embodiment of the present application, and can detect various scenarios in which a human body approaches or contacts an antenna radiator, and can set a corresponding antenna transmission power for each scenario, so as to improve the communication performance of the electronic device as much as possible while reducing the impact of SAR of the electronic device on human health in various user usage scenarios. It has the same or similar beneficial effects as the aforementioned antenna detection module embodiment of the present application, and will not be described again here to avoid repetition.

[0149] The embodiment of the present application further provides an antenna transmission power control method, which can be applied to the antenna detection module provided in the aforementioned embodiment of the present application, or can be applied to the electronic device provided in the aforementioned embodiment of the present application;

[0150] like Figure 6 As shown, the method includes:

[0151] Step 601: When the capacitance of the antenna radiator is detected to be greater than or equal to a first threshold value by the self-capacitance detection module, it is determined that the distance between a human body and the antenna radiator is less than or equal to a first distance value, and the mutual capacitance detection module is started, and the transmission power of the antenna radiator is controlled to be less than or equal to a first power;

[0152] Step 602: When the mutual capacitance detection module detects that the mutual capacitance between the antenna radiator and the metal part is less than or equal to a second threshold, determine that a human body is in contact with the antenna radiator, and control the transmission power of the antenna radiator to be less than or equal to a second power.

[0153] In some embodiments, the first power is greater than the second power.

[0154] The antenna transmission power control method provided in the embodiment of the present application can realize the various functional steps of the aforementioned antenna detection module or electronic device embodiment of the present application, and can achieve similar beneficial effects as the aforementioned antenna detection module or electronic device embodiment of the present application. To avoid repetition, it will not be repeated here.

[0155] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned antenna transmission power control method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0156] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0157] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned antenna transmission power control method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0158] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0159] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the above-mentioned antenna transmission power control method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0160] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0161] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0162] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An antenna detection module, characterized in that: include: Antenna radiator, metal parts, self-capacitance detection module and mutual capacitance detection module; The antenna radiator is spaced apart from the metal member; The self-capacitance detection module is electrically connected to the antenna radiator, and the self-capacitance detection module is used to detect the capacitance of the antenna radiator; A first end of the mutual capacitance detection module is electrically connected to the antenna radiator, a second end of the mutual capacitance detection module is electrically connected to the metal piece, and the mutual capacitance detection module is used to detect the mutual capacitance between the antenna radiator and the metal piece; Wherein, when the capacitance of the antenna radiator is greater than or equal to the first threshold, the mutual capacitance detection module is in an activated state, and the transmission power of the antenna radiator is less than or equal to the first power; When the mutual capacitance between the antenna radiator and the metal member is less than or equal to a second threshold, the transmission power of the antenna radiator is less than or equal to a second power.

2. The antenna detection module according to claim 1, characterized in that: Also includes: Power adjustment module; The self-capacitance detection module and the mutual capacitance detection module are electrically connected to the power adjustment module respectively; The self-capacitance detection module sends a first signal to the power adjustment module when detecting that the capacitance of the antenna radiator is greater than or equal to the first threshold; The mutual capacitance detection module sends a second signal to the power adjustment module when detecting that the mutual capacitance between the antenna radiator and the metal part is less than or equal to the second threshold; When the first signal is received but the second signal is not received, the power adjustment module reduces the transmission power of the antenna radiator to the first power; when the second signal is received, the power adjustment module reduces the transmission power of the antenna radiator to the second power.

3. The antenna detection module according to claim 1 or 2, characterized in that: Also includes: a first inductor and a second inductor; The self-capacitance detection module is electrically connected to the antenna radiator through the first inductor; The first end of the mutual capacitance detection module is electrically connected to the antenna radiator through the second inductor; The frequency of the excitation signal used by the self-capacitance detection module and the mutual-capacitance detection module is lower than the operating frequency of the antenna radiator.

4. The antenna detection module according to claim 3, characterized in that: Also includes: A third inductor, through which the second end of the mutual capacitance detection module is electrically connected to the metal component.

5. The antenna detection module according to claim 1 or 2, characterized in that: Also includes: Combiner; The self-capacitance detection module and the mutual capacitance detection module are electrically connected to the antenna radiator through different filtering paths in the combiner respectively; The self-capacitance detection module and the mutual-capacitance detection module respectively use excitation signals of different frequencies to perform capacitance detection.

6. The antenna detection module according to claim 1 or 2, characterized in that: The number of the antenna radiators is N, the number of the metal parts is N, and N is an integer greater than 1; The N metal parts are arranged in one-to-one correspondence with the N antenna radiators; The self-capacitance detection module is electrically connected to the N antenna radiators, and / or a first end of the mutual-capacitance detection module is electrically connected to the N antenna radiators, and a second end of the mutual-capacitance detection module is electrically connected to the N metal parts; The antenna detection module further includes: M fourth inductors and M fifth inductors, where M is an integer greater than 1, and M is less than or equal to N; The M fourth inductors are respectively connected in series between any two antenna radiators among the N antenna radiators; The M fifth inductors are respectively connected in series between any two metal parts among the N metal parts.

7. The antenna detection module according to claim 2, characterized in that: The number of the antenna radiators is N, the number of the metal parts is N, and N is an integer greater than 1; The N metal parts are arranged in one-to-one correspondence with the N antenna radiators; The mutual capacitance detection module includes L first ends and L second ends, the L first ends of the mutual capacitance detection module are driving electrodes of the L first detection channels in the mutual capacitance detection module, the L second ends of the mutual capacitance detection module are receiving ends of the L first detection channels in the mutual capacitance detection module, and L is an integer greater than 1; The L first detection channels are respectively electrically connected between N groups of metal pieces and antenna radiators arranged in pairs; When the target first detection channel in the mutual capacitance detection module detects that the mutual capacitance between the first target antenna radiator and the first target metal part is less than or equal to the second threshold, the transmission power of the first target antenna radiator is less than or equal to the second power; Among them, the target first detection channel is any detection channel among the L first detection channels, the first target antenna radiator is an antenna radiator among the N antenna radiators that is electrically connected to the target first detection channel, and the first target metal part is a metal part among the N metal parts that is electrically connected to the target first detection channel.

8. The antenna detection module according to claim 2, characterized in that: The number of the antenna radiators is N, the number of the metal parts is N, and N is an integer greater than 1; The N metal parts are arranged in one-to-one correspondence with the N antenna radiators; The self-capacitance detection module includes H second detection channels, where H is an integer greater than 1; The N antenna radiators are electrically connected to the N second detection channels of the self-capacitance detection module respectively; When the target second detection channel in the self-capacitance detection module detects that the capacitance of the second target antenna radiator is greater than or equal to the first threshold, the transmission power of the second target antenna radiator is less than or equal to the first power; The target second detection channel is any detection channel among the H second detection channels, and the second target antenna radiator is an antenna radiator among the N antenna radiators that is electrically connected to the target second detection channel.

9. An electronic device, characterized in that: It comprises the antenna detection module as described in any one of claims 1 to 8, wherein the antenna radiator in the antenna detection module is arranged on the surface of the electronic device.

10. The electronic device according to claim 9, characterized in that: The metal part in the antenna detection module is housed in the electronic device and is spaced apart from the antenna radiator.

11. A method for controlling antenna transmission power, characterized in that: Applicable to the antenna detection module according to any one of claims 1 to 8, or applied to the electronic device according to claim 9 or 10; The method comprises: When the capacitance of the antenna radiator is detected to be greater than or equal to a first threshold value by the self-capacitance detection module, it is determined that the distance between the human body and the antenna radiator is less than or equal to a first distance value, and the mutual capacitance detection module is started, and the transmission power of the antenna radiator is controlled to be less than or equal to a first power; When the mutual capacitance detection module detects that the mutual capacitance between the antenna radiator and the metal part is less than or equal to a second threshold, it is determined that a human body is in contact with the antenna radiator, and the transmission power of the antenna radiator is controlled to be less than or equal to a second power.

12. The method according to claim 11, characterized in that The first power is greater than the second power.

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