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Table 2 Properties of materials used

From: SAR reduction in the modelled human head for the mobile phone using different material shields

Materials

Conductivity (S/m)

Relative permittivity

Mass density (kg/m3)

Aluminium

38,000,000

1

2689

Copper

58,000,000

1

8933

Teflon

0

2.1

2250

Glass

0

5.5

2500

Plastic

0

2.25

930

Air

0

1.0006

1.1614

Germanium

2.17

16.2

5350