Wireless terminal for reducing specific absorption rate peak and realization method thereof

Abstract

The disclosure discloses a wireless terminal with a reduced Specific Absorption Rate (SAR) peak. The wireless terminal comprises a Printed Circuit Board (PCB), wherein a fractal gap is formed at an edge of a metal ground on the PCB to disturb distribution of induced current at the edge of the metal ground. The disclosure also discloses a method for reducing an SAR peak. On the premise of the non-influence on the communication quality of the wireless terminal, the SAR and the production cost can be reduced and the structure space of wireless terminal can be saved by using the wireless terminal and the method.

Description

technical field [0001] The present invention relates to a technology for reducing the Absorption Rate (SAR, Specific Absorption Rate) of a wireless terminal, in particular to a wireless terminal for reducing the SAR peak value and its implementation method. Background technique [0002] With the rapid development of wireless communication technology, wireless terminals such as mobile terminals and data cards have been widely used, and it can also be found that the size of existing wireless terminals is becoming smaller and smaller, while increasing the difficulty of wireless terminal structure design , It also brings another important problem: the electromagnetic radiation of wireless terminals to the human body is also enhanced. [0003] At present, the index to measure the electromagnetic radiation of the antenna to the human body is SAR, which refers to the energy absorption ratio of the wireless terminal electromagnetic wave. The specific meaning is: under the action of ...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of wireless communication technology, wireless terminals such as mobile terminals and data cards have been widely used, and it can also be found that the size of existing wireless terminals is becoming smaller and smaller, while increasing the difficulty of wireless terminal structure design , also brings another important problem: the electromagnetic radiation of wireless terminals to the human body is also enhanced

Although the above two schemes can achieve the purpose of reducing SAR, there is a common defect in the two schemes: among them, after the wave-absorbing material and / or radiation-proof layer are coated on the surface of the wireless terminal casing, the coated wave-absorbing material And / or the anti-radiation layer will absorb the electromagnetic wave emitted by the wireless terminal to the human body, but it will also absorb the useful signal radiated by the antenna in the form of electromagnetic wave, which will affect the communication quality of the wireless terminal; similarly, although the conductor reflector and shielding device can isolate The electromagnetic waves emitted to the human body will also isolate the useful signal radiated from the antenna and affect the communication quality of the wireless terminal

The above two solutions not only reduce the SAR of the wireless terminal, but also affect the communication performance of the wireless terminal. That is to say, the radiation to the human body in the near area of ​​the wireless terminal antenna is reduced, but the far-field radiation of the antenna is greatly affected. The wireless terminal cannot communicate smoothly, and the communication quality cannot be guaranteed

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