Isolation circuit, SAR sensor circuit, antenna assembly and electronic equipment

Abstract

The present disclosure relates to an isolation circuit, a SAR sensor circuit, an antenna assembly and an electronic device. The isolation circuit includes: a first isolation unit; the first isolation unit includes a plurality of capacitors, and the connection method of the plurality of capacitors includes at least a series connection method. The plurality of capacitors can isolate the low-frequency working signal of the SAR sensor, ensure that the low-frequency working signal of the SAR sensor on the antenna is input to the SAR sensor, and thus improve the detection accuracy of the SAR sensor. In addition, the connection method of the plurality of capacitors includes at least a series connection method, so that the capacitance value of the isolation circuit can be reduced to meet the needs of antenna debugging, thereby improving the flexibility of antenna debugging and improving antenna performance.

Description

Technical Field

[0001] The present disclosure relates to the field of terminal technology, and in particular to an isolation circuit, a SAR sensor circuit, an antenna assembly and an electronic device. Background Art

[0002] With the development of mobile communication technology, people are using mobile terminals, especially mobile phones, more and more widely. However, these mobile terminals often generate electromagnetic radiation during the communication process. When the mobile terminal is close to the human body and the electromagnetic radiation power is large, it may cause a certain degree of radiation damage to the human body.

[0003] The degree of terminal radiation is usually measured by the electromagnetic wave absorption ratio. In order to monitor the radiation of the mobile terminal, a proximity sensor, such as a specific absorption ratio sensor (SAR Sensor), can be set in the terminal. The electromagnetic wave absorption ratio sensor can effectively detect the contact between the human body and the mobile terminal when the distance is close. Every time someone approaches, it will report data, and the transmission power will be reduced according to the reported content to reduce the adverse effects of terminal radiation on the human body. However, when the user uses the terminal for a long time, the peripheral circuit of the SAR sensor may be damaged due to bumps, resulting in inaccurate sensing results of the SAR Sensor, and unable to effectively reduce the transmission power of the antenna, thereby failing to effectively reduce radiation. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the present disclosure provides an isolation circuit, a SAR sensor circuit, an antenna assembly and an electronic device.

[0005] According to a first aspect of an embodiment of the present disclosure, an isolation circuit is provided, one end of the isolation circuit is connected to a feed point of an antenna, and the other end of the isolation circuit is connected to a radio frequency circuit and a ground terminal; the isolation circuit comprises: a first isolation unit;

[0006] The first isolation unit includes a plurality of capacitors, and the connection method of the plurality of capacitors at least includes a series connection method.

[0007] Optionally, the isolation circuit further includes a second isolation unit;

[0008] One end of the second isolation unit is connected to the first isolation unit and the radio frequency circuit respectively, and the other end of the second isolation unit is grounded.

[0009] Optionally, the second isolation unit includes one or more inductors.

[0010] According to a second aspect of an embodiment of the present disclosure, a SAR sensor circuit is provided. The SAR sensor circuit includes the isolation circuit according to the first aspect of the embodiment of the present disclosure, and the SAR sensor circuit further includes:

[0011] The capacitance value detection component is connected to the isolation circuit and is used to detect the current capacitance value of the isolation circuit;

[0012] The processing component is connected to the capacitance detection component and is used to determine the state of the isolation circuit according to the current capacitance value of the isolation circuit and the standard capacitance value of the isolation circuit;

[0013] The control component is connected to the processing component and is used to control the transmission power of the antenna according to the state of the isolation circuit.

[0014] Optionally, the processing component is used to determine that there is an abnormality in the isolation circuit when the current capacitance value is greater than the standard capacitance value.

[0015] Optionally, the control component is used to reduce the transmission power of the antenna when it is determined that the isolation circuit is abnormal.

[0016] Optionally, the SAR sensor circuit further comprises: a SAR sensor, wherein the SAR sensor is connected to the processing component and the control component respectively;

[0017] The processing component is used to send a trigger instruction to the SAR sensor when it is determined that the isolation circuit is abnormal;

[0018] When receiving the trigger instruction, the SAR sensor outputs a signal for indicating that the target object is close to the antenna to the control component, so that the control component reduces the transmission power of the antenna.

[0019] Optionally, the SAR sensor is further configured to output a sensing signal when no trigger instruction sent by the processing component is received;

[0020] The control component is further used to adjust the transmission power of the antenna according to the sensing signal.

[0021] According to a third aspect of an embodiment of the present disclosure, an antenna assembly is provided, the antenna assembly comprising: an antenna, a radio frequency circuit, and the SAR sensor circuit as described in the second aspect of the embodiment of the present disclosure, the SAR sensor circuit comprising the isolation circuit as described in the first aspect of the embodiment of the present disclosure, one end of the isolation circuit is connected to a feed point of the antenna, and the other end is connected to the radio frequency circuit and a ground terminal;

[0022] The SAR sensor circuit is used to detect the state of the isolation circuit and control the transmission power of the antenna according to the state of the isolation circuit.

[0023] According to a fourth aspect of an embodiment of the present disclosure, an electronic device is provided, wherein the electronic device includes the antenna assembly as described in the third aspect of an embodiment of the present disclosure.

[0024] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0025] With the above technical solution, the first isolation unit includes multiple capacitors, which can isolate the low-frequency working signal of the SAR sensor, ensuring that the low-frequency working signal of the SAR sensor on the antenna is input to the SAR sensor, thereby improving the detection accuracy of the SAR sensor. In addition, the connection method of the multiple capacitors at least includes a series connection method, so that the capacitance value of the isolation circuit can be reduced to meet the needs of antenna debugging, thereby improving the flexibility of antenna debugging and improving antenna performance.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0028] Figure 1 It is a schematic diagram of a peripheral circuit of a SAR sensor in the related art.

[0029] Figure 2 is a schematic diagram of an isolation circuit according to an exemplary embodiment.

[0030] Figure 3 is a schematic diagram of another isolation circuit according to an exemplary embodiment.

[0031] Figure 4 is a block diagram of a SAR sensor circuit according to an exemplary embodiment. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0033] The embodiments described in some embodiments of the present disclosure below do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0034] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0035] Figure 1 FIG. 1 is a schematic diagram of a peripheral circuit of a SAR sensor in the related art. Figure 1 As shown, the peripheral circuit adopts the form of a single-stage series capacitor, that is, a capacitor and an inductor are connected in series to form an LC circuit. By detecting the change in the capacitance value of the peripheral circuit, it is determined whether the peripheral circuit is abnormal, and then the abnormal mechanism is called after the abnormality is determined to achieve the purpose of reducing radiation. Among them, whether the peripheral circuit is abnormal usually refers to whether a component is lost in the peripheral circuit, that is, whether the component is detached from the peripheral circuit, causing the peripheral circuit to be abnormal.

[0036] exist Figure 1 In the embodiment, the peripheral circuit of the SAR sensor is arranged between the feed point of the antenna and the radio frequency circuit, wherein the radio frequency circuit may include an antenna matching unit and a radio frequency unit, that is, the peripheral circuit of the SAR sensor may be arranged between the feed point of the antenna and the antenna matching unit.

[0037] At present, the mechanism for determining whether a peripheral circuit is abnormal is to determine whether the difference between the standard capacitance group and the current capacitance value of the peripheral circuit is greater than a threshold. If the difference between the standard capacitance group and the current capacitance value of the peripheral circuit is greater than the threshold, it is determined that there is an abnormality in the peripheral circuit. The standard capacitance group refers to the capacitance value of the peripheral circuit detected by the terminal before leaving the factory, the current capacitance value is detected during user use, and the threshold value can be the capacitance value of the capacitor in the peripheral circuit, that is, Figure 1 The capacitance value of capacitor C1.

[0038] Based on the above mechanism for determining whether the peripheral circuit is abnormal, it can be known that only one capacitor can be set in the peripheral circuit. The above mechanism for determining whether the peripheral circuit is abnormal is only applicable to the case where one capacitor is set in the peripheral circuit. However, only one capacitor is set in the peripheral circuit, and the capacitance value in the peripheral circuit cannot be flexibly adjusted, which may seriously affect the flexibility of antenna debugging, thereby affecting the performance of the antenna.

[0039] In view of this, the present disclosure provides an isolation circuit, a SAR sensor circuit, an antenna assembly, and an electronic device, wherein the isolation circuit is arranged between the feed point of the antenna and the radio frequency circuit, and the isolation circuit includes multiple capacitors, and the connection method of the multiple capacitors at least includes a series connection method. In this way, the isolation circuit arranged between the feed point of the antenna and the radio frequency circuit can include multiple capacitors, and the capacitance value between the feed point of the antenna and the radio frequency circuit can be flexibly adjusted, thereby improving the flexibility of antenna debugging and improving antenna performance.

[0040] Figure 2 FIG. 1 is a schematic diagram of an isolation circuit according to an exemplary embodiment. Figure 2 As shown, the isolation circuit 20 is arranged between the feed point 30 of the antenna and the radio frequency circuit 40. For example, one end of the isolation circuit 20 is connected to the feed point 30 of the antenna, and the other end is connected to the radio frequency circuit 40 and the ground respectively.

[0041] In the present disclosure, an isolation circuit may refer to a background circuit of a SAR sensor. The isolation circuit is a circuit that can obtain a low-frequency working signal of the SAR sensor from an antenna and transmit the signal to the SAR sensor. For example, the SAR sensor is mounted on a circuit board, and the isolation circuit may be a circuit on the circuit board.

[0042] The working signal of the SAR sensor is a low-frequency signal. In order to ensure that the SAR sensor can receive high-quality low-frequency signals, it is necessary to prevent the low-frequency signal of the SAR sensor on the antenna from being input to the ground. Therefore, in the present disclosure, the isolation circuit 20 is used to isolate the low-frequency working signal of the SAR sensor to prevent the low-frequency working signal from being input to the ground. Figure 2 As shown, the isolation circuit 20 includes a first isolation unit 201, and the first isolation unit 201 is used to isolate the low-frequency working signal of the SAR sensor. For example, the first isolation unit 201 may include multiple capacitors, and the multiple capacitors are used to isolate the low-frequency working signal of the SAR sensor.

[0043] In addition, considering that a lower capacitance value may be required during antenna debugging, the connection method of the multiple capacitors at least includes a series connection method, so that the purpose of reducing the capacitance value can be achieved by connecting the capacitors in series.

[0044] One way to connect multiple capacitors is to connect multiple capacitors in series. Another way to connect multiple capacitors is to connect multiple capacitors in series and parallel, that is, some capacitors are connected in series and some capacitors are connected in parallel. Figure 2 It is taken as an example that the first isolation unit 201 includes n capacitors, which are respectively denoted as capacitor C1, capacitor C2, ..., capacitor Cn, and the n capacitors are connected in series.

[0045] With the above technical solution, the first isolation unit includes multiple capacitors, which can isolate the low-frequency working signal of the SAR sensor, ensuring that the low-frequency working signal of the SAR sensor on the antenna is input to the SAR sensor, thereby improving the detection accuracy of the SAR sensor. In addition, the connection method of the multiple capacitors at least includes a series connection method, so that the capacitance value of the isolation circuit can be reduced to meet the needs of antenna debugging, thereby improving the flexibility of antenna debugging and improving antenna performance.

[0046] In addition, since the isolation circuit is arranged between the feed point of the antenna and the RF circuit, in order to prevent the RF signal output by the RF circuit from being input into the feed point of the antenna and interfering with the low-frequency working signal, in one embodiment, the isolation circuit 20 may also include a second isolation unit, and one end of the second isolation unit is respectively connected to the first isolation unit 201 and the RF circuit 40, and the other end of the second isolation unit 202 is grounded.

[0047] Figure 3 FIG. 1 is a schematic diagram of another isolation circuit according to an exemplary embodiment. Figure 3 As shown, one end of the second isolation unit 202 is respectively connected to the first isolation unit 201 and the RF circuit 40, and the other end of the second isolation unit 202 is grounded. The second isolation unit 202 is used to isolate the RF signal output by the RF circuit 40 to prevent the RF signal output by the isolated RF circuit 40 from interfering with the low-frequency working signal output by the feed point of the antenna.

[0048] Since the radio frequency signal is a high frequency signal, in order to prevent the radio frequency signal from being input into the SAR sensor, the second isolation unit 202 may be any circuit that can prevent the high frequency radio frequency signal from passing through.

[0049] In one embodiment, the second isolation unit 202 may include one or more inductors to prevent the RF signal output by the RF circuit 40 from being input to the SAR sensor and interfering with the low-frequency working signal. In practical applications, multiple inductors may be provided according to actual needs, and the connection of the multiple inductors may include series connection and / or parallel connection. For ease of description, in the present disclosure, the second isolation unit 202 includes an inductor L1 as an example.

[0050] By adopting the above technical solution, the low-frequency working signal of the SAR sensor can be isolated through the first isolation circuit, ensuring that the low-frequency working signals of the SAR sensor on the antenna are all input to the SAR sensor, thereby improving the detection accuracy of the SAR sensor. The second isolation circuit can isolate the radio frequency signal output by the radio frequency circuit to avoid interfering with the low-frequency working signal of the SAR sensor, further improving the detection accuracy of the SAR sensor. In addition, the first isolation circuit includes multiple capacitors, and the connection method of the multiple capacitors includes at least a series connection method. In this way, the capacitance value of the isolation circuit can be reduced to meet the needs of antenna debugging, thereby improving the flexibility of antenna debugging and improving antenna performance.

[0051] The present disclosure also provides a SAR sensor circuit, which may include: Figure 2 or Figure 3 The isolation circuit shown in the figure can detect the current capacitance value of the isolation circuit, and determine the state of the isolation circuit according to the current capacitance value and the standard capacitance value, and then control the transmission power of the antenna according to the state of the isolation circuit.

[0052] Figure 4 FIG. 1 is a block diagram of a SAR sensor circuit according to an exemplary embodiment. Figure 4 As shown, the SAR sensor circuit includes an isolation circuit 20, and the structure of the isolation circuit 20 is as follows Figure 2 or Figure 3 As shown. Figure 4 As shown, the SAR sensor circuit may further include a capacitance detection component 50 , a processing component 60 and a control component 70 .

[0053] The capacitance detection component 50 is connected to the isolation circuit 20 and is used to detect the current capacitance value of the isolation circuit. By way of example, the capacitance detection component 50 may be a capacitance tester, which detects the current capacitance value of the isolation circuit upon receiving a capacitance detection instruction. The current capacitance value of the isolation circuit refers to the capacitance value of the entire isolation circuit, which may include the capacitance values ​​of multiple capacitors included in the isolation circuit and the capacitance values ​​of some peripheral devices.

[0054] The processing component 60 is connected to the capacitance detection component 50, and is used to determine the state of the isolation circuit according to the current capacitance value of the isolation circuit and the standard capacitance value of the isolation circuit. The control component 70 is connected to the processing component 60, and is used to control the transmission power of the antenna according to the state of the isolation circuit.

[0055] The standard capacitance value of the isolation circuit refers to the capacitance value of the isolation circuit when the antenna carrying the SAR sensor circuit of the terminal is calibrated when the terminal is equipped with the SAR sensor circuit before leaving the factory, that is, when there is no human contact, that is, the capacitance value of the isolation circuit detected when there is no abnormality in the isolation circuit. In addition, different terminals have different standard capacitance values ​​of the isolation circuit according to their different configurations.

[0056] Due to the working characteristics of the SAR sensor circuit and the damage of the terminal components during use, the capacitor or other components of the background circuit of the SAR sensor, i.e., the isolation circuit, may fall off from the circuit, thereby causing the current capacitance value of the isolation circuit to change, resulting in an abnormal isolation circuit, so that the SAR sensor cannot accurately measure whether there is a pedestrian approaching the antenna. Therefore, in the present disclosure, the state of the isolation circuit is determined by the current capacitance value of the isolation circuit and the standard capacitance value of the isolation circuit, and then the transmission power of the antenna is controlled according to the state, so that the transmission power of the antenna can be effectively controlled, thereby effectively reducing radiation.

[0057] For example, the processing component 60 is used to determine that an abnormality exists in the isolation circuit when the current capacitance value is greater than the marked capacitance value.

[0058] It should be understood that the reciprocal of the capacitance value of the branch where the series capacitor is located is equal to the sum of the reciprocals of each capacitor in the branch, that is, the capacitance value of the branch where the series capacitor is located is less than the minimum capacitance value of the capacitors in the branch. Figure 2 and Figure 3 As shown, multiple capacitors are connected in series, and the capacitance of the multiple capacitors is less than the capacitance of the smallest value among the multiple capacitors, and the more capacitors are connected in series, the smaller the capacitance of the series branch. Therefore, if the capacitor falls off from the isolation circuit, the capacitance of the series branch will increase. Therefore, when the current capacitance value is greater than the standard capacitance value, it can be considered that at least one capacitor has fallen off from the isolation circuit, that is, it is determined that the isolation circuit is abnormal. That is, for Figure 2 or Figure 3 For the isolation circuit shown, the abnormality detection mechanism is offset_factory-offset_user<0, where offset_factory is used to characterize the standard capacitance value of the isolation circuit, and offset_user is used to characterize the current capacitance value of the isolation circuit.

[0059] With the above technical solution, the isolation circuit includes multiple capacitors, and the connection method of the multiple capacitors includes at least series connection. When the current capacitance value is greater than the standard capacitance value, it is determined that the isolation circuit is abnormal. In this way, for the antenna carrying the SAR sensor circuit, the flexibility of the antenna debugging can be improved, the antenna performance can be improved, and the normal detection of the abnormal mechanism can be guaranteed.

[0060] When an abnormality exists in the isolation circuit, it will affect the perception signal of the SAR sensor, that is, when an abnormality exists in the isolation circuit, the SAR sensor cannot accurately detect whether there is a pedestrian approaching the antenna. In this way, when a pedestrian approaches the antenna, the antenna's transmission power will not be reduced due to an error in the sensing signal, which will cause a certain degree of radiation damage to the human body. Therefore, in the present disclosure, in order to effectively reduce the radiation of the antenna to the human body, it is determined that the isolation circuit has an abnormality when it is detected that the isolation circuit meets the abnormality detection mechanism. And when it is determined that the isolation circuit has an abnormality, the control component reduces the antenna's transmission power.

[0061] For example, the SAR sensor circuit further includes: a SAR sensor, which is connected to a processing component and a control component respectively. The processing component is used to send a trigger instruction to the SAR sensor when it is determined that there is an abnormality in the isolation circuit. When receiving the trigger instruction, the SAR sensor outputs a signal to the control component for indicating that the target object is close to the antenna, so that the control component reduces the transmission power of the antenna.

[0062] When the processing unit determines that there is an abnormality in the isolation circuit, the processing unit sends a trigger instruction to the SAR sensor, and when the SAR sensor receives the trigger instruction, it outputs a signal to the control unit for indicating that the target object is close to the antenna. At this time, regardless of whether the actual sensing signal of the SAR sensor indicates that there is a target object close to the antenna, the SAR sensor outputs a signal for indicating that the target object is close to the antenna to trigger the control unit to reduce the transmission power of the antenna. The target object can be any biological object, such as a pedestrian.

[0063] By adopting the above technical solution, when it is determined that there is an abnormality in the isolation circuit, the SAR sensor outputs a signal for representing that the target object is close to the antenna, and then the control component reduces the transmission power of the antenna. In this way, it can effectively avoid the problem of radiation damage to the human body due to failure to reduce the transmission power of the antenna due to erroneous sensing signals.

[0064] In addition, the SAR sensor is further configured to output a sensing signal when no trigger instruction sent by the processing component is received, and the control component is configured to adjust the transmission power of the antenna according to the sensing signal.

[0065] When the processing component determines that there is no abnormality in the isolation circuit, for example, when it determines that the current capacitance value of the isolation circuit is less than or equal to the standard capacitance value, it does not send a trigger instruction to the SAR sensor. The SAR sensor outputs a sensing signal actually detected when it does not receive a trigger instruction. At this time, since the isolation circuit does not affect the detection accuracy of the SAR sensor, the sensing signal output by the SAR sensor has a high accuracy and can accurately represent whether there is a target object close to the antenna, and then the control component can accurately adjust the transmission power of the antenna according to the sensing signal.

[0066] In this way, when the isolation circuit is working normally, in order to provide users with good communication quality and make the antenna's transmission power meet good communication requirements, the control component can adjust the antenna's transmission power according to the sensing signal. In this way, when the target object is close to the antenna, the antenna's transmission power is reduced to reduce the antenna's radiation to the human body. When the target object is not close to the antenna, the antenna's transmission power is increased to improve the communication quality.

[0067] Based on the same concept, the present disclosure further provides an antenna assembly, which includes an antenna, a radio frequency circuit, and a SAR sensor circuit provided by the present disclosure, wherein the SAR sensor circuit includes an isolation circuit provided by the present disclosure, wherein one end of the isolation circuit is connected to a feed point of the antenna, and the other end is connected to the radio frequency circuit and a ground end;

[0068] The SAR sensor circuit is used to detect the state of the isolation circuit and control the transmission power of the antenna according to the state of the isolation circuit.

[0069] Based on the same concept, the present disclosure also provides an electronic device, which includes the antenna provided by the present disclosure.

[0070] By way of example, the electronic device may be a terminal, which may be, for example, a smart phone, a tablet computer, a wearable device, or a PC.

[0071] Those skilled in the art may also understand that the various illustrative logical blocks and steps listed in the embodiments of the present application may be implemented by electronic hardware, computer software, or a combination of the two. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the functions described for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present application.

[0072] It should be understood that, unless otherwise specifically noted, the features of some embodiments of the various present disclosures described herein may be combined with each other. As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more; similarly, "at least one of . . . " includes any one of the related listed items and any combination of any two or more.

[0073] It should be understood that, unless otherwise clearly specified and limited, the terms "joining", "attaching", "installing", "connecting", "connecting", "fixing" and the like used in the embodiments of the present disclosure should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0074] Although terms such as "first" and "second" can be used herein to describe various components, parts, regions, layers or sections, these components, parts, regions, layers or sections are not limited to these terms. On the contrary, these terms are only used to distinguish one component, component, region, layer or section from another component, component, region, layer or section. Therefore, without departing from the teachings of each example, the first component, component, region, layer or section mentioned in the examples described herein may also be referred to as the second component, component, region, layer or section. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may expressly or implicitly include at least one of the features. In the description herein, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In addition, the word "exemplary" is used herein to indicate serving as an example, instance, or diagram. Any aspect or design described as "exemplary" in this article is not necessarily understood to be advantageous compared to other aspects or designs. On the contrary, the use of the word exemplary is intended to present concepts in a specific way. As used herein, the term "or" is intended to represent an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X applies A or B" is intended to represent any one of the natural inclusive arrangements. That is, if X applies A; X applies B; or X applies both A and B, "X applies A or B" is satisfied under any of the aforementioned examples. In addition, unless otherwise specified or clearly pointed to a singular form from the context, the articles "one" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0076] Likewise, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art after reading and understanding the specification and drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise noted, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if the structure is not equivalent to the disclosed structure. In addition, although the specific features of the present disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations as may be desired and conducive to any given or specific application. In addition, with respect to "including", "having", "having", "having", or variations thereof used in the specific embodiments or claims, such terms are intended to be inclusive in a manner similar to the term "comprising".

[0077] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the scheme disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0078] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An isolation circuit, characterized in that: One end of the isolation circuit is connected to the feed point of the antenna, and the other end is connected to the radio frequency circuit and the ground end; the isolation circuit includes: a first isolation unit; The first isolation unit includes a plurality of capacitors, and the connection method of the plurality of capacitors at least includes a series connection method.

2. The isolation circuit according to claim 1, characterized in that: The isolation circuit further includes a second isolation unit; One end of the second isolation unit is connected to the first isolation unit and the radio frequency circuit respectively, and the other end of the second isolation unit is grounded.

3. The isolation circuit according to claim 2, characterized in that: The second isolation unit includes one or more inductors.

4. A SAR sensor circuit, characterized in that: The SAR sensor circuit comprises the isolation circuit according to any one of claims 1 to 3, and the SAR sensor circuit further comprises: The capacitance value detection component is connected to the isolation circuit and is used to detect the current capacitance value of the isolation circuit; The processing component is connected to the capacitance detection component and is used to determine the state of the isolation circuit according to the current capacitance value of the isolation circuit and the standard capacitance value of the isolation circuit; The control component is connected to the processing component and is used to control the transmission power of the antenna according to the state of the isolation circuit.

5. The SAR sensor circuit according to claim 4, characterized in that: The processing component is used to determine that an abnormality exists in the isolation circuit when the current capacitance value is greater than the standard capacitance value.

6. The SAR sensor circuit according to claim 4, characterized in that: The control component is used to reduce the transmission power of the antenna when it is determined that the isolation circuit is abnormal.

7. The SAR sensor circuit according to claim 6, characterized in that: The SAR sensor circuit further comprises: a SAR sensor, wherein the SAR sensor is connected to the processing component and the control component respectively; The processing component is used to send a trigger instruction to the SAR sensor when it is determined that the isolation circuit is abnormal; When receiving the trigger instruction, the SAR sensor outputs a signal for indicating that the target object is close to the antenna to the control component, so that the control component reduces the transmission power of the antenna.

8. The SAR sensor circuit according to claim 7, characterized in that: The SAR sensor is further configured to output a sensing signal when no trigger instruction sent by the processing component is received; The control component is further used to adjust the transmission power of the antenna according to the sensing signal.

9. An antenna assembly, characterized in that: The antenna assembly comprises: an antenna, a radio frequency circuit, and a SAR sensor circuit according to any one of claims 4 to 8, wherein the SAR sensor circuit comprises an isolation circuit according to any one of claims 1 to 3, wherein one end of the isolation circuit is connected to a feed point of the antenna, and the other end is connected to the radio frequency circuit and a ground terminal; The SAR sensor circuit is used to detect the state of the isolation circuit and control the transmission power of the antenna according to the state of the isolation circuit.

10. An electronic device, characterized in that: The electronic device comprises the antenna assembly according to claim 9.

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