Ambit U10C035 Guida alla Risoluzione dei Problemi Scaricare il pdf (Pagina 19)

| Ubee Interactive 2011

Signal Attenuation and performance drops can result when the wireless signal is absorbed by an object or material,

or as the wireless client moves farther away from the Wireless Gateway. The table below illustrates rule of

thumb attenuation for different kinds of materials.

Material Attenuation (dB)

2.4 GHz

5 GHz

Interior drywall

3-4

3-5

Cubicle wall

2-5

4-9

Wood door (hollow - solid)

3-4

6-7

Brick / Concrete wall

6-18

10-30

Glass / Window (not tinted)

2-3

6-8

Double-pane coated glass

Bullet-proof glass

Steel/fire exit door

13-19

25-32

Human Body

Free Space

.24/ft

.5/ft

Tree (est)

.15/ft

.3/ft

Sources: Furr, Oak Ridge National Labs, 2008, and IEEE

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Ambit U10C035 Guida alla Risoluzione dei Problemi Pagina 19