Panasonic KX-TD1232E, Руководство по установке

Страница: 564 / 713

8.2.2 Site Planning
8-6 DECT Portable Station Section
The Relationship between Radio Waves and
Building Structure and Materials
• The transmitting range is affected more by the building materials
and thickness of the material 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.
Wall
Window
Floor
Partition
Column
Cabinet
Concrete
Ferroconcrete
Glass
Glass with wire nets
Glass covered with
heat-resistant film
Ferroconcrete
Steel
Plywood, Glass
Ferroconcrete
Metal
Steel
Wood
The thicker they are, the less radio waves penetrate them.
Radio waves can penetrate them, but the more iron there is,
the more radio waves are reflected.
Radio waves usually penetrate them.
Radio waves can penetrate them, but tend to be reflected.
Radio waves are weakened considerably when they penetrate
windows.
Radio waves can penetrate them, but the more iron there is,
the more radio waves are reflected.
Radio waves are reflected and rarely penetrate them.
Radio waves usually penetrate them.
Radio waves can penetrate them, but the more iron there is,
the more radio waves tend to be reflected or diffracted.
Radio waves tend to be reflected or diffracted.
Radio waves are usually reflected or diffracted, and rarely
penetrate them.
Radio waves can penetrate them, but they are weakened.
O
BJECT
M
ATERIAL
T
RANSMISSION
T
ENDENCY