Measurement system of specific absorption rate

Abstract

The invention aims at providing a specific absorbed rate measurement device which can measure the specific absorbed rate (SAR) that is used for evaluating the absorbed power by human bodies when a mobile phone is used near the human bodies. The specific absorbed rate measurement device of the invention includes: a probe, which measures the amplitude and the phase of two-dimensional electric field or magnetic field in a human model that simulates the electric constants of a human body; an electric field estimation unit which estimates the three-dimensional distribution of the electric field that takes the two-dimensional electric field and the magnetic field of a measured point as the wave source radiation according to the measuring result of the probe; a specific absorbed rate estimation unit which estimates the three-dimensional specific absorbed rate according to the estimated result of the electric field estimation unit.

Description

technical field [0001] The present invention relates to a specific absorption rate measuring device capable of measuring a specific absorption rate (Specific Absorption Rate: SAR) at high speed and with high precision. Background technique [0002] The specific absorption rate (SAR) is used to evaluate the power absorbed by the human body when a mobile phone or the like is used near the human body, and is shown in Equation (1) (for example, refer to Non-Patent Document 1.). Among them, σ is the conductivity of the medium (S / m), ρ is the density of the medium (kg / m 3 ), E is the electric field (V / m). [0003] Formula 1) [0004] SAR = σ | E | 2 ρ - - - ( 1 ) [0005] Usually, when measuring the specific absorp...

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Problems solved by technology

[0019] As mentioned above, in the past, the specific absorption rate distribution in the depth direction was estimated from the two-dimensional specific absorption rate measurement results, thereby shortening the measurement time, but it was difficult to be accurate because the parameters of the estimation formula were determined empirically or approximately. Estimate the SAR distribution under various conditions

Therefore, it becomes the main cause of the decrease in the accuracy of the specific absorption rate measurement (uncertainty error), and there is a problem that it cannot be measured with high accuracy.

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