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, including a first antenna, a second antenna, a first distance measuring device and a second distance measuring device, and the first distance measuring device is arranged on the mobile terminal On the first side, the second ranging device is disposed on the second side of the mobile terminal opposite to the first side. The first ranging device detects the distance between the user's head and the mobile terminal, and when the distance between the user's head and the mobile terminal is less than or equal to the preset head distance threshold, the first distance of the work is reduced according to the head back-off parameter. The transmit power of an antenna. The second ranging device detects the distance between the user's body and the mobile terminal, and when the distance between the user's body and the mobile terminal is less than or equal to the preset body distance threshold, reduces the emission of the working second antenna according to the body back-off parameter power. Therefore, the SAR value of the mobile terminal can be effectively reduced without affecting the OTA performance of the mobile terminal through the first distance measuring device and the second distance measuring device.

Description

technical field [0001] The 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 human tissue per unit mass, and the unit is 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 currents, resulting in the absorption and dissipation of electromagnetic energy. The SAR value generally refers to the heat energy generated by electromagnetic waves in mobile phones or wireless products, which is a measure of the impact on the human body. The greater the thermal energy ...

AI Technical Summary

Problems solved by technology

[0004] At present, for the current 4G mobile phones, there are mainly two solutions 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 solution 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, so that 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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