Method and device for acquiring specific absorption rate of electromagnetic waves

Abstract

The invention discloses a method and a device for acquiring specific absorption rate of electromagnetic waves. The method includes the steps of establishing a near-field reference plane S of a mobile terminal MIMO (multiple input multiple output) antenna in a free space, and computing electromagnetic field of the mobile terminal MIMO antenna on the reference plane S; utilizing the electromagnetic field equivalence principle to acquire frequency domain equivalent surface magnetic current (formula) on the near-field reference plane S; on the basis of the frequency domain equivalent surface magnetic current on the near-field reference plane S and electromagnetic interaction between the equivalent surface magnetic current and the human body model, computing electric field distribution inside a human body model, and acquiring a SAR (specific absorption rate) value corresponding to the electric field distribution. By decomposing jointed electromagnetism simulation of a data card, an antenna and a human body organization into the electromagnetism simulation of the data card and the antenna and the electromagnetism simulation of magnetic current motivated human body organization, and accordingly a standardized model for SAR simulation of the mobile terminal MIMO antenna is provided, and reliability and capability of being standardized of a SAR evaluation model are guaranteed.

Description

technical field [0001] The invention relates to the equivalent modeling technology of multiple-input multiple-output (MIMO) antenna equipment, in particular to a method and device for obtaining the specific absorption rate of electromagnetic waves. Background technique [0002] The integration of MIMO antennas with wireless communication devices such as mobile terminals (such as cellular wireless network cards) can meet people's growing mobile communication needs. However, the electromagnetic radiation energy generated when the mobile terminal is working will be absorbed by the human body, and when the electromagnetic energy absorbed by the human body is excessive, it will cause harm to human health. [0003] In order to quantitatively characterize the amount of electromagnetic energy absorbed by the human body, the Specific Absorption Rate (SAR, Specific Absorption Rate) parameter of electromagnetic waves is introduced. The SAR parameter is defined as the electromagnetic p...

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Problems solved by technology

[0006] However, real mobile terminal MIMO antennas often have the characteristics of high complexity and poor versatility. This feature determines that real mobile terminal MIMO antenna equipment cannot be used as a standardized SAR evaluation model, but it needs to be credibly abstracted and simplified. Form a credible SAR evaluation model that takes into account the three factors of versatility, modeling efficiency and cost. Among them, the accurate equivalent modeling method of MIMO antenna equipment is one of the prerequisites to ensure the credibility and standardization of its SAR evaluation model

[0007] In the current IEEE SAR simulation model, there is no SAR simulation standardized model for mobile terminal MIMO antenna equipment

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