Method for reducing SAR, mobile terminal, and computer readable storage medium

Abstract

The present invention relates to a method for reducing SAR, a mobile terminal, and a computer readable storage medium. The mobile terminal comprises a first antenna, a second antenna, a first distancemeasuring device, and a second distance measuring device, wherein the first distance measuring device is disposed on a first side of the mobile terminal, and the second distance measuring device is disposed on a second side of the mobile terminal opposite to the first side; the first distance measuring device is used for detecting a distance between the head of a user and the mobile terminal, andreducing the transmission power of the first working antenna according to a head back-off parameter when the distance between the head of the user and the mobile terminal is less than or equal to a preset head distance threshold; the second distance measuring device is used for detecting a distance between the body of the user and the mobile terminal, and reducing the transmission power of the second working antenna according to a body back-off parameter when the distance between the body of the user and the mobile terminal is smaller than or equal to a preset body distance threshold. Therefore, the SAR value of the mobile terminal can be effectively reduced by the first distance measuring device and the second distance measuring device without affecting the OTA performance of the mobileterminal.

Description

Technical field [0001] The present invention relates to the technical field of mobile terminal radiation adjustment, in particular to a method for reducing SAR, a mobile terminal and a computer-readable storage medium. Background technique [0002] SAR (Specific Absorption Rate) is the electromagnetic wave absorption ratio or specific absorption rate, which is defined as the electromagnetic power absorbed or consumed by a unit mass of human tissue, in W / kg. Under the action of an external electromagnetic field, an induced electromagnetic field will be generated in the human body. Since various organs of the human body are lossy media, the electromagnetic field in the body will generate electric current, which leads to the absorption and dissipation of electromagnetic energy. The SAR value generally refers to the heat generated by electromagnetic waves in mobile phones or wireless products, and it is a measure of the impact on the human body. The larger the thermal energy value ...

AI Technical Summary

Problems solved by technology

[0004] At present, for the current 4G mobile phones, there are mainly two schemes to reduce SAR: 1) adjust the matching of the antenna, change the hotspot distribution or antenna radiation performance of the mobile phone antenna, so as to achieve the purpose of reducing the SAR value of the mobile phone antenna, but this kind of scheme Although the purpose of reducing the SAR value of the mobile phone antenna can be achieved, it will inevitably increase the time for antenna debugging, which is equivalent to readjusting the antenna matching that has been debugged, which will increase the workload of the designer, prolong the product development cycle, and adjust the antenna. The matching will also reduce the OTA (Over-the-Air) performance of the mobile phone antenna to a certain extent; 2) By opening a hot spot (hot-spot) or directly reducing the RF output power, the SAR value of the mobile phone antenna Below the required safety standards

However, by directly reducing the RF output power, it will also reduce the OTA performance of the mobile phone antenna. At the same time, 3GPP has requirements for the lower limit of the RF output power. When the SAR value exceeds the standard, this solution cannot effectively solve the SAR value exceeding the standard. question

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