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Power loss in typical office materials

Could you share the loss in typical office materials? e.g. fiber wool ceiling and dry wall, brick wall, concrete wall with metal inside.

Lok

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Hall of Fame Super Red

Re: Power loss in typical office materials

Ho Lok,

Signal attenuation or signal loss occurs even as the signal passes through air. The loss of signal strength is more pronounced as the signal passes through different objects. A transmit power of 20 mW is equivalent to 13 dBm. Therefore, if the transmitted power at the entry point of a plasterboard wall is at 13 dBm, the signal strength will be reduced to 10 dBm when exiting that wall.Here some examples;

Plasterboard wall Signal Attenuation 3 dB

Glass wall with metal frame Signal Attenuation 6 dB

Cinder block wall Signal Attenuation 4 dB

Office window Signal Attenuation 3 dB

Metal door Signal Attenuation 6 dB

Metal door in brick wall Signal Attenuation 12 dB

Human body Signal Attenuation 3 dB

From this good site survey doc;

http://www.cisco.com/en/US/products/hw/phones/ps379/products_implementation_design_guide_chapter09186a00802a09e0.html

Hope this helps!

Rob

Please remember to rate helpful posts.....

1 REPLY
Hall of Fame Super Red

Re: Power loss in typical office materials

Ho Lok,

Signal attenuation or signal loss occurs even as the signal passes through air. The loss of signal strength is more pronounced as the signal passes through different objects. A transmit power of 20 mW is equivalent to 13 dBm. Therefore, if the transmitted power at the entry point of a plasterboard wall is at 13 dBm, the signal strength will be reduced to 10 dBm when exiting that wall.Here some examples;

Plasterboard wall Signal Attenuation 3 dB

Glass wall with metal frame Signal Attenuation 6 dB

Cinder block wall Signal Attenuation 4 dB

Office window Signal Attenuation 3 dB

Metal door Signal Attenuation 6 dB

Metal door in brick wall Signal Attenuation 12 dB

Human body Signal Attenuation 3 dB

From this good site survey doc;

http://www.cisco.com/en/US/products/hw/phones/ps379/products_implementation_design_guide_chapter09186a00802a09e0.html

Hope this helps!

Rob

Please remember to rate helpful posts.....

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