Odd objects
can act unintentional receiver, causing interference voltage or
current. However the energy level usually low. Vice versa, this definition
also applies the interference power within the component due external
interference sources. This specified [dB] (VG
95214 standard).6. specified logarithmic ratio and such
referred the shielding effectiveness ratio.Hoods and Housings 57
• Capacitive coupling:
There permanent certain capacity between the cable conductors and the
connector housing, because these are adjacent circuits with variable
potential difference.
• Radiation coupling:
Electromagnetic waves emanate from the cable (antenna principle) a
result high transmission frequencies and “long” cable runs. This voltage current can superimposed transmission
signals. This potential difference may cause electrical current
to flow (through the air which insulates them), resulting disturbance
capacity.
Shielding effectiveness
The shielding effectiveness component defined the ratio a
power radiated within the component the maximum resulting interference
power outside the component the environment. The transfer impedance component screening parameter.
3.
(VG 95214 standard)
.
Transfer impedance
The transfer impedance the ratio the induced interference voltage
between outer conductor and housings the interference current applied to
the screen.4 EMC Properties
The screening effect housing can described terms the shielding
effectiveness factor and the coupling resistance Rc
