SAR sensor and terminal device

Abstract

The utility model relates to an SAR sensor and terminal equipment, the SAR sensor comprises a plurality of signal channels, each signal channel is used for being connected with an antenna; the at least one common reference channel is grounded, and the common reference channel corresponds to the at least two signal channels; wherein the signal channel is connected with the corresponding common reference channel through a first impedance. Compared with the prior art that an independent special reference channel is arranged for each signal channel, the SAR sensor can detect the SAR values for more antennas, the SAR values of the antennas can be controlled more accurately, and the configuration number of the SAR sensors is reduced. Each signal channel in the SAR sensor is connected with the corresponding common reference channel through the first impedance, so that noise on the signal channels can be filtered under the condition of sharing the reference channels, and the accuracy of SAR value detection is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a SAR sensor and a terminal device. Background Art

[0002] In the era of mobile Internet, terminal devices such as smartphones are becoming more and more functional and have better performance. In addition, users' reliance on terminal devices and the frequency of use have also increased significantly. Currently, terminal devices are equipped with more and more antennas, and the frequency coverage range is getting larger and larger. The signals radiated by them will be absorbed by the human body to a certain extent. The absorbed signal energy will cause certain harm to the human body. The SAR (Specific Absorption Rate) indicator is used internationally to measure the energy absorbed by the human body in an electromagnetic exposure environment. Terminal devices can be configured with SAR sensors to detect the SAR value of the antenna relative to the human body, and dynamically adjust the radiation energy of the antenna based on the detection results to avoid harm to the human body.

[0003] However, the SAR sensor in the related art supports a small number of antennas for detection, which results in inaccurate control of the SAR value of the antenna, or a large number of SAR sensors are configured. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the embodiments of the present disclosure provide a SAR sensor and a terminal device to solve the defects in the related art.

[0005] According to a first aspect of an embodiment of the present disclosure, a SAR sensor is provided, the sensor comprising:

[0006] A plurality of signal channels, each signal channel being used to connect to an antenna;

[0007] at least one common reference channel, the common reference channel being grounded, and the common reference channel corresponding to at least two signal channels;

[0008] Wherein, the signal channel is connected to the corresponding common reference channel through a first impedance.

[0009] In a possible embodiment of the present disclosure, the signal channel corresponds to a plurality of the common reference channels.

[0010] In a possible embodiment of the present disclosure, the common reference channel is grounded through a first capacitor.

[0011] In a possible embodiment of the present disclosure, a distance between the first capacitor and the common reference channel is smaller than a distance between the first capacitor and ground.

[0012] In a possible embodiment of the present disclosure, one end of the first impedance is connected to a connection line between the signal channel and the antenna, and the other end is connected to a line between the common reference channel and ground.

[0013] In a possible embodiment of the present disclosure, a distance between the first impedance and the antenna is smaller than a distance between the first impedance and the signal channel.

[0014] In a possible embodiment of the present disclosure, the other end of the first impedance is connected to a line between the common reference channel and the first capacitor.

[0015] In a possible embodiment of the present disclosure, the first impedance includes a first resistor and / or a first inductor.

[0016] In a possible embodiment of the present disclosure, the signal channel and the corresponding common reference channel are arranged in a differential routing manner.

[0017] According to a second aspect of an embodiment of the present disclosure, a terminal device is provided, wherein the terminal device includes the SAR sensor as described in any one of the above embodiments.

[0018] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0019] The SAR sensor provided by the embodiment of the present disclosure has multiple signal channels and at least one common reference channel, each signal channel is used to connect to an antenna to detect the SAR value of the connected antenna, and each common reference channel is grounded and corresponds to at least two signal channels, that is, at least two signal channels share a common reference channel. Compared with the related art that arranges a separate dedicated reference channel for each signal channel, the SAR sensor can detect SAR values ​​for more antennas, with a higher utilization rate, and can make the SAR value control of the antenna more accurate, and reduce the number of configurations of the SAR sensor. In addition, each signal channel in the SAR sensor is connected to the corresponding common reference channel through a first impedance, so that the noise on the signal channel can be filtered out in the case of a shared reference channel, thereby improving the accuracy of SAR value detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] Figure 1 is a structural schematic diagram of a SAR sensor shown in an exemplary embodiment of the present disclosure;

[0022] Figure 2is another structural schematic diagram of a SAR sensor shown in an exemplary embodiment of the present disclosure;

[0023] Figure 3 is another structural schematic diagram of a SAR sensor shown in an exemplary embodiment of the present disclosure;

[0024] Figure 4 is another structural schematic diagram of a SAR sensor shown in an exemplary embodiment of the present disclosure;

[0025] Figure 5 It is a structural block diagram of a terminal device shown in an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] 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.

[0027] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0028] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0029] In the era of mobile Internet, terminal devices such as smartphones are becoming more and more functional and have better performance. In addition, users' reliance on terminal devices and the frequency of use have also increased significantly. Currently, terminal devices are equipped with more and more antennas, and the frequency coverage range is getting larger and larger. The signals radiated by them will be absorbed by the human body to a certain extent. The absorbed signal energy will cause certain harm to the human body. The SAR (Specific Absorption Rate) indicator is used internationally to measure the energy absorbed by the human body in an electromagnetic exposure environment. Terminal devices can be configured with SAR sensors to detect the SAR value of the antenna relative to the human body, and dynamically adjust the radiation energy of the antenna based on the detection results to avoid harm to the human body.

[0030] However, the SAR sensor in the related art supports a small number of antennas for detection, which results in inaccurate control of the SAR value of the antenna, or a large number of SAR sensors are configured.

[0031] For example, some of the multiple channels of the SAR sensor are connected to the antenna, and the remaining channels need to configure a reference channel for each channel connected to the antenna, that is, the SAR sensors exist in pairs, and each pair is used for SAR detection of one antenna; Figure 1 Take the SAR sensor in as an example, its CS0 channel is connected to antenna ANT1, CS1 channel is used as the reference channel of CS0 channel, CS3 channel is connected to antenna ANT2, CS4 channel is used as the reference channel of CS0 channel, and CS2 channel is idle. This makes the number of antennas that the SAR sensor can detect smaller; thus, some antennas cannot detect SAR values, and the SAR control of these antennas cannot be accurate; or in order to ensure that each antenna can detect SAR values, more SAR sensors need to be configured, but these SAR sensors will occupy the already tight installation space in the terminal, or even there is not enough space in the terminal to install these SAR sensors. Moreover, in the antenna solutions with multiple upper frame points, it is often the case that the temperature drift characteristics of the signal channel are opposite to the temperature drift characteristics of the reference channel, resulting in the failure of the trigger function of the SAR sensor.

[0032] Based on this, on the first aspect, at least one embodiment of the present disclosure provides a SAR sensor, which is configured in a terminal device and is used to detect the SAR value of the antenna of the terminal device. It has a high utilization rate and can detect a large number of antennas. It can accurately detect and control the SAR value of each antenna while occupying less space in the terminal device.

[0033] Please refer to the attached Figure 2 To Attachment Figure 4 , which exemplarily shows the preferred structure of the SAR sensor. It can be understood that the attached Figure 2 To Attachment Figure 4 Only part of the SAR sensor structure is shown, and Figure 2 To Attachment Figure 4 The structure shown is not a structural limitation of the SAR sensor provided by the present disclosure. The SAR sensor includes: a plurality of signal channels, each signal channel is used to connect to an antenna; at least one common reference channel, the common reference channel is grounded, and the common reference channel corresponds to at least two signal channels; wherein the signal channel is connected to the corresponding common reference channel through a first impedance.

[0034] It should be understood that the SAR sensor has multiple channels, wherein multiple channels are used to connect to the antenna, i.e., as signal channels, wherein at least one channel is used as a common reference channel. The signal channel and the common reference channel may occupy part or all of the channels of the SAR sensor. For example, a corresponding number of channels in the SAR sensor may be selected as signal channels according to the number of antennas of the terminal device, and the remaining channels may be used as common reference channels.

[0035] Attach Figure 2 Taking the SAR sensor shown as an example, it has five channels CS0, CS1, CS2, CS3, and CS4, and the terminal device where it is located has four antennas ANT1, ANT2, ANT3, and ANT4; therefore, CS0, CS1, CS2, and CS3 are used as signal channels and are respectively used to link with the four antennas ANT1, ANT2, ANT3, and ANT4 one by one, and CS5 is used as a common reference channel for common use by the four signal channels CS0, CS1, CS2, and CS3.

[0036] Attach Figure 3 Taking the SAR sensor shown as an example, it has three channels CS0, CS1, and CS2, and the terminal device where it is located has two antennas ANT1 and ANT2; therefore, CS0 and CS1 are used as signal channels and are respectively used to link with the two antennas ANT1 and ANT2 one by one, and CS3 is used as a common reference channel for common use by the two signal channels CS0 and CS1.

[0037] Optionally, the signal channel may correspond to a plurality of the common reference channels. In other words, when the number of common reference channels is greater than 1, the plurality of common reference channels may be used as a whole for a plurality of signal channels, that is, for a plurality of common reference channels and a plurality of signal channels, each common reference channel corresponds to each signal channel. Figure 4Taking the SAR sensor shown as an example, it has five channels CS0, CS1, CS2, CS3, and CS4, and the terminal device where it is located has three antennas ANT1, ANT2, and ANT3; therefore, CS0, CS1, and CS2 are used as signal channels, and are respectively used to link with the three antennas ANT1, ANT2, and ANT3 in a one-to-one correspondence, and CS3 and CS4 are used as common reference channels for the three signal channels CS0, CS1, and CS2 to share, that is, CS3 corresponds to the three signal channels CS0, CS1, and CS2, respectively, and CS4 also corresponds to the three signal channels CS0, CS1, and CS2, respectively.

[0038] Exemplarily, the common reference channel is grounded via a first capacitor, and the first capacitor can be used to debug the temperature drift characteristics of the common reference channel to avoid the opposite of the temperature drift characteristics of the signal channel. Figure 2 Taking the SAR sensor shown in the figure as an example, its common reference channel CS4 is grounded through capacitor C5; Figure 3 Taking the SAR sensor shown in the figure as an example, its common reference channel CS2 is grounded through capacitor C3; Figure 4 Taking the SAR sensor shown as an example, its common reference channel CS3 is grounded through capacitor C4, and its common reference channel CS4 is grounded through capacitor C5. Preferably, the distance between the first capacitor and the common reference channel is less than the distance between the first capacitor and the ground, that is, the first capacitor is close to the SAR sensor. It should be understood that the common reference channel may also be not grounded, but directly suspended.

[0039] Exemplarily, the signal channel and the corresponding common reference channel are arranged in a differential routing manner, that is, they are routed in parallel with each other and are three-dimensionally wrapped with a ground.

[0040] Exemplarily, the signal channel is connected to the corresponding common reference channel through the first impedance, which may refer to: one end of the first impedance is connected to the connection line between the signal channel and the antenna, and the other end is connected to the line between the common reference channel and the ground, for example, the line between the common reference channel and the first capacitor. Preferably, the distance between the first impedance and the antenna is smaller than the distance between the first impedance and the signal channel, that is, the first impedance is close to the feed point spring of the antenna.

[0041] Wherein, the first impedance includes a first resistor and / or a first inductor. If the first impedance is a first resistor, the resistance value of the first resistor needs to be greater than 560Ω; if the first impedance is a first inductor, the inductance value of the first inductor needs to be greater than 200nH.

[0042] Attach Figure 2Taking the SAR sensor shown in the figure as an example, the line between CS0 and ANT1 is connected through the resistor R1, the inductor L1 and the line between CS4 and the capacitor C5; the line between CS1 and ANT2 is connected through the resistor R2, the inductor L2 and the line between CS4 and the capacitor C5; the line between CS2 and ANT3 is connected through the resistor R3, the inductor L3 and the line between CS4 and the capacitor C5; the line between CS3 and ANT4 is connected through the resistor R4, the inductor L4 and the line between CS4 and the capacitor C5. Figure 3 Taking the SAR sensor shown in the figure as an example, the line between CS0 and ANT1 is connected through the resistor R1 and the line between CS2 and the capacitor C3; the line between CS1 and ANT2 is connected through the resistor R2 and the line between CS2 and the capacitor C3. Figure 2 Taking the SAR sensor shown as an example, the line between CS0 and ANT1 is connected through the line between the inductor L1 and CS3 and the capacitor C4, and is connected through the line between the inductor LX1 and CS4 and the capacitor C5; the line between CS1 and ANT2 is connected through the line between the inductor L2 and CS3 and the capacitor C4, and is connected through the line between the inductor LX2 and CS4 and the capacitor C5; the line between CS2 and ANT3 is connected through the line between the inductor L3 and CS3 and the capacitor C4, and is connected through the line between the inductor LX3 and CS4 and the capacitor C5.

[0043] The SAR sensor provided by the embodiment of the present disclosure has multiple signal channels and at least one common reference channel, each signal channel is used to connect to an antenna to detect the SAR value of the connected antenna, and each common reference channel is grounded and corresponds to at least two signal channels, that is, at least two signal channels share a common reference channel. Compared with the related art that arranges a separate dedicated reference channel for each signal channel, the SAR sensor can detect SAR values ​​for more antennas, with a higher utilization rate, and can make the SAR value control of the antenna more accurate, and reduce the number of SAR sensors configured; and can avoid the situation where the temperature drift characteristics of the signal channel and the corresponding common reference channel are opposite to each other, so as to ensure the normal triggering function of the sensor. In addition, each signal channel in the SAR sensor is connected to the corresponding common reference channel through a first impedance, so that the noise on the signal channel can be filtered out in the case of a shared reference channel, thereby improving the accuracy of SAR value detection.

[0044] According to a second aspect of the embodiments of the present disclosure, a terminal device is provided, wherein the terminal device includes the SAR sensor as described in any of the above embodiments. Exemplarily, the terminal device also includes multiple antennas.

[0045] Please refer to the attached Figure 5, which exemplarily shows a block diagram of the electronic device. For example, the device 500 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0046] Reference Figure 5 , device 500 may include one or more of the following components: a processing component 502 , a memory 504 , a power component 506 , a multimedia component 508 , an audio component 510 , an input / output (I / O) interface 512 , a sensor component 514 , and a communication component 516 .

[0047] The processing component 502 generally controls the overall operation of the device 500, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 502 may include one or more processors 520 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 502 may include one or more modules to facilitate the interaction between the processing component 502 and other components. For example, the processing component 502 may include a multimedia module to facilitate the interaction between the multimedia component 508 and the processing component 502.

[0048] The memory 504 is configured to store various types of data to support operations on the device 500. Examples of such data include instructions for any application or method operating on the device 500, contact data, phone book data, messages, pictures, videos, etc. The memory 504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0049] Power component 506 provides power to various components of device 500. Power component 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 500.

[0050] The multimedia component 508 includes a screen that provides an output interface between the device 500 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 508 includes a front camera and / or a rear camera. When the device 500 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0051] The audio component 510 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC), and when the device 500 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 504 or sent via the communication component 516. In some embodiments, the audio component 510 also includes a speaker for outputting audio signals.

[0052] I / O interface 512 provides an interface between processing component 502 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0053] The sensor assembly 514 includes one or more sensors for providing various aspects of status assessment for the device 500. For example, the sensor assembly 514 can detect the open / closed state of the device 500, the relative positioning of components, such as the display and keypad of the device 500, and the sensor assembly 514 can also image the position change of the device 500 or a component of the device 500, the presence or absence of user contact with the device 500, the orientation or acceleration / deceleration of the device 500, and the temperature change of the device 500. The sensor assembly 514 can also include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 514 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 514 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0054] The communication component 516 is configured to facilitate wired or wireless communication between the device 500 and other devices. The device 500 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G or 5G or a combination thereof. In an exemplary embodiment, the communication component 516 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0055] In an exemplary embodiment, device 500 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0056] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0057] 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. A SAR sensor, characterized in that: The sensor comprises: A plurality of signal channels, each signal channel being used to connect to an antenna; at least one common reference channel, the common reference channel being grounded, and the common reference channel corresponding to at least two signal channels; Wherein, the signal channel is connected to the corresponding common reference channel through a first impedance.

2. The SAR sensor according to claim 1, characterized in that: The signal channel corresponds to a plurality of the common reference channels.

3. The SAR sensor according to claim 1, characterized in that: The common reference channel is grounded via a first capacitor.

4. The SAR sensor according to claim 3, characterized in that: A distance between the first capacitor and the common reference channel is smaller than a distance between the first capacitor and ground.

5. The SAR sensor according to claim 3, characterized in that: One end of the first impedance is connected to the connection line between the signal channel and the antenna, and the other end is connected to the line between the common reference channel and the ground.

6. The SAR sensor according to claim 5, characterized in that: The distance between the first impedance and the antenna is smaller than the distance between the first impedance and the signal channel.

7. The SAR sensor according to claim 5, characterized in that: The other end of the first impedance is connected to a line between the common reference channel and the first capacitor.

8. The SAR sensor according to claim 1, characterized in that: The first impedance includes a first resistor and / or a first inductor.

9. The SAR sensor according to claim 1, characterized in that: The signal channel and the corresponding common reference channel are arranged in a differential routing manner.

10. A terminal device, characterized in that: The terminal device comprises the SAR sensor according to any one of claims 1 to 9.

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