Ascotel IntelliGate 2025/2045/2065
Part 3 Planning DECT systems 619
Fig. 3.18: Obstacle-induced attenuation and reflection of DECT signals
Fig. 3.19: Example of multipath propagation with DECT signals
Obstacles may include:
• Moving metal objects such as lifts, cranes, carriages, escalators, blinds, espe-
cially ones that are actuated automatically (the influence of such obstacles var-
ies and is therefore difficult to assess)
• Metal-panelled rooms and large metal-clad objects such as air conditioners,
computer rooms, metallized glassed areas (mirrored), fire protection walls,
storage tank installations, refrigerating units, boilers
70
60
50
40
30
received power [dB]
rapid fading
(due to stationary waves)
λ/2 = 8 cm
route covered
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slow fading (environment-related)
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dB
t
signal can no longer be detected
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