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Information on

radio technology

Relationship between radio waves and construction type as well as material properties:
• The construction materials and the thickness thereof have stronger effects on the transmitter
range than the number of obstacles.

• Radio waves tend to be reflected or deflected by electrically conductive objects and
penetrate them only to a limited extent.

• Radio waves tend to penetrate electrically non-conductive objects and are reflected by
such objects only to a limited extent.

• Radio waves penetrate thin objects better than thick objects.

• The following table describes how radio waves are usually influenced when impinging on
different materials.

Object Material Usual behaviour
Wall Concrete The thicker the wall, the less the penetration thereof by radio waves.
Reinforced Radio waves can penetrate this material. However, the more steel it
concrete contains, the more radio waves are reflected.
Window Glass Radio waves usually penetrate glass.
Wired glass Although radio waves can penetrate wired glass, they tend to be
reflected.
Glass with Radio waves are considerably weakened when they penetrate glass
insulating with insulating foil.
foil
Floor Reinforced Radio waves can penetrate this material. However, the more steel it
concrete contains, the more radio waves are reflected.
Separating Steel Steel separating walls reflect radio waves and are penetrated by
wall them only to a limited extent.
Plywood, Radio waves usually penetrate this material.
glass
Pillar Reinforced Radio waves can penetrate this material.However, the more steel it
concrete contains, the more radio waves are reflected.
Metal Radio waves tend to be reflected or deflected.
Cupboard Steel Steel usually reflects or weakens radio waves and is penetrated by
them only to a limited extent.
Wood Radio waves can penetrate wood, however, they are weakened.

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