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Absorption rate measurement system and method

一种测量系统、吸收率的技术，应用在吸收率测量系统和方法领域，能够解决传感器装置设置复杂、增加测量时间等问题，达到简化SAR估计过程和测量系统的效果

Inactive Publication Date: 2013-01-30
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An unnecessarily high number of measurement points complicates the scanning method and / or the setup of the sensor device and requires additional calculations of the magnetic or electric fields, which can lead to problems with increased measurement times

Method used

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  • Absorption rate measurement system and method
  • Absorption rate measurement system and method
  • Absorption rate measurement system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Fig. 2A is a schematic diagram of a fast SAR measurement system according to a first embodiment of the present invention. As shown in the figure, the fast SAR measurement system includes: tissue equivalent liquid (model) 201, which has a predetermined dielectric constant to simulate the human body; model housing 202; electrical probe 203; probe scanning device 204; signal cable 205 ; Electric field detection device 206 and measurement control and data analysis and processing device 207. In this system, as shown in FIG. 2A, a radio terminal device such as a mobile phone 208 is mounted on a dummy case 202, and an electric field generated inside the dummy 201 is measured. The wireless terminal device may be, for example, but not limited to, a personal digital assistant (PDA), a desktop computer, a handheld computer, a credit card recognition terminal, a camera, and a wearable computer, all of which have radio communication functions or are networkable. In addition, the sh...

Embodiment 2

[0069] In Embodiment 1 above, an electric field sensor (probe, etc.) is used to measure the two-dimensional electric field distribution. However, multiple sensors can be arranged in an array to measure the electric field distribution. When an array sensor is used, the scanning time of the electric field sensor can be greatly reduced, thereby realizing higher-speed measurement of SAR. However, when multiple sensors are used at the same time, it may become inconvenient to scan all multiple sensors depending on the situation. In this case it is advantageous to make the mobile phone scannable.

[0070] Fig. 7 shows a fast SAR measurement system according to a second embodiment of the present invention. In the second embodiment, measurement is performed using a plurality of probes 703 arranged in an array. As shown in the drawing, a plurality of probes are arranged at predetermined intervals within a measurement region in which measurement is to be performed on the two-dimension...

Embodiment 3

[0073] Fig. 8 is a functional block diagram of fast SAR measurement processing according to the third embodiment of the present invention. In this embodiment, the measured electric field information determining means 806 controls the electric field distribution measuring system 801 so that the amplitude and phase are measured for the electric field component parallel to the observation surface S, and only the amplitude is measured for the electric field component perpendicular to the observation surface S.

[0074] FIG. 9 shows the electric field coordinates associated with the viewing plane S. As shown in FIG. In this figure, the viewing surface S is formed as an xy plane. Therefore, the amplitude and phase (E x e jθx ,E y e jθy ) and only measure the amplitude of the electric field component Ez perpendicular to the observation plane S. Equations (2) and (3) above are used to calculate the electric field component in the dielectric away from the viewing surface S. Since...

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Abstract

A disclosed specific absorption rate measurement system according to an embodiment of the present invention measures a specific absorption rate of electromagnetic waves from a radiating source absorbed in a dielectric medium. The system includes a measurement portion that measures a first electric field vector on an observation surface which is a two-dimensional surface in the dielectric medium; an electric field calculation portion that calculates a second electric field vector in a point excluded from the observation surface in accordance with electric field components of the first electric field vector measured on the observation surface, the electric field components being parallel to the observation surface; and a calculation portion that calculates the specific absorption rate from the calculated second electric field vector.

Description

technical field [0001] The present invention relates to a measurement system and method for measuring the specific absorption rate (SAR) of electromagnetic energy absorbed in a dielectric medium during exposure from a radiation source such as a mobile phone. Background technique [0002] Absorption rate (SAR) is the rate at which electromagnetic energy from a radiation source is absorbed in a dielectric, and it is specifically defined as the squared power of the electric field strength (|E| 2 ) proportional value, as expressed in equation (1). [0003] SAR = σ | E | 2 ρ - - - ( 1 ) [0004] where σ represents the conductivity of the dielectric (S / m), and ρ is the density of the medium (kg / m 3 ). SAR is measured ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/00G01R29/08
CPCG01R29/0857G01R29/0871G01R29/0885G01R29/08
Inventor 木南克规井山隆弘大西辉夫
Owner NTT DOCOMO INC