Difference between revisions of "B4-Attenuation and Scattering"
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== ⌘Attenuation parameters for 2.4 GHz == | == ⌘Attenuation parameters for 2.4 GHz == | ||
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|| Obstacle ||Attenuation <math>\fs3 \alpha_i </math> [dB] || | || Obstacle ||Attenuation <math>\fs3 \alpha_i </math> [dB] || | ||
|| Brick wall with window || 2 || | || Brick wall with window || 2 || | ||
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|| Metall door in brick wall || 12.4 || | || Metall door in brick wall || 12.4 || | ||
|| Floor || 30 || | || Floor || 30 || | ||
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Measurements performed for European building | Measurements performed for European building | ||
Revision as of 14:11, 26 September 2017
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Contents
⌘ Interaction of electromagnetic waves with the Environment
Examples are:
- leaves will mainly interact around 6 Unik/GHz: thickness will attenuate, whereas reflection is due to diameter of leaves
- branches will have main interaction at about 1 Unik/GHz
- the tree trunk will interact with almost all frequencies at 30 Unik/MHz and above.
⌘ Attenuation in walls
Attenuation in material follows typical an exponential behaviour. |
⌘Attenuation parameters for 2.4 GHz
Obstacle | Attenuation [dB] | Brick wall with window | 2 | Brick wall next to metal door | 3 | Cinder Block wall | 4 | Office wall | 6 | Metal door in office wall | 6 | Metall door in brick wall | 12.4 | Floor | 30 |
Measurements performed for European building
(Source:Hydra Deliverable D5.4, p 12)
⌘ Path loss calculation
Hydra pass loss approximation
- relation between fading margin and receiver sensitivity