1.
Radio waves are reflected by objects made of materials such as metal.
2.
Radio waves are diffracted by objects such as metallic columns.
3.
Radio waves penetrate objects made of materials such as glass.
SIP-CS
Column
3. Penetration
2. Diffraction
1. Reflection
Relationships Between Radio Waves and Building Structure and Materials
•
The SIP-CS coverage area is affected more by the building materials and their thickness than the number
of obstacles.
•
Radio waves tend to be reflected or diffracted by conductive objects and rarely penetrate them.
•
Radio waves tend to penetrate insulated objects and are rarely reflected by them.
•
Radio waves penetrate thin objects more than thick objects.
•
The table below shows the transmission tendency of radio waves when they reach objects made from
various materials.
Object
Material
Transmission Tendency
Wall
Concrete
The thicker they are, the less radio waves
penetrate them.
Ferroconcrete
Radio waves can penetrate them, but the more
iron there is, the more radio waves are reflected.
Window
Glass
Radio waves usually penetrate them.
Glass with wire net
Radio waves can penetrate them, but tend to be
reflected.
Glass covered with
heat-resistant film
Radio waves are weakened considerably when
they penetrate windows.
Floor
Ferroconcrete
Radio waves can penetrate them, but the more
iron there is, the more radio waves are reflected.
Partition
Steel
Radio waves are reflected and rarely penetrate
them.
Plywood, Glass
Radio waves usually penetrate them.
Installation Guide
27
4 Deployment Procedure
