Jung FMGCR1700 handleiding
Handleiding
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Transmitter
Receiver
Absorbed
radiation
Reflected
radiation
Transmitted
radiation
Absorbed
radiation
MEDIUM
1. RADIO RADIATION
Radio waves are waves from
connected electric and magnet-
ic fields. They are created from
changing electric currents when
the fields that are changing in
response to the changing cur-
rents detach themselves from
the field-generating source and
spread out in the space.
Characteristic data of an elec-
tromagnetic field are wavelength
and frequency f. Between
these two parameters, there ex-
ists the relationship c = · f, i. e.
the product produces the propaga-
tion speed c, ≈ 300,000 km/s.
As the transmitted energy depends
on the frequency, electromagnetic
waves of different frequency ranges
differ in terms of how they interact
with matter. For example the fre-
quency range of visible light is char-
acterised by the fact that the waves
have enough energy to stimulate
chemical molecules, but without
ionising or destroying them.
The term “radio” refers to the fre-
quency range technically used
for wireless information transfer,
i. e. from approx. 10 kHz to 300 GHz.
Radio waves with a low to medium
frequency do not have enough en-
ergy to stimulate matter, but can
penetrate building ceilings or walls.
Depending on the mass (thickness)
and conductivity (metal content,
moisture), this is associated with
high energy loss to a greater or
lesser extent.
2. PROPERTIES OF
ELECTROMAGNETIC
WAVES
Just like their sources – electric
and magnetic fields – electromag-
netic waves do not need a medium
of their own and spread out in the
vacuum at the speed of light. Prop-
agation is always slower in other
media.
Electromagnetic waves spread
out in a straight line, in all direc-
tions within the room. If several
electromagnetic waves encounter
one another, they penetrate one
another without any interference.
Reflection, transmission and absorption
of electromagnetic radiation
Electromagnetic wave – model representation
170 171eNet _ Annex / medium
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Productinformatie
| Merk | Jung |
| Model | FMGCR1700 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 24644 MB |
