Skin effect

Alternating currents do not uniformly occupy the entire cross section of the conductor, rather inductance effect in the conductor deflects the current towards the surface of the conductor, whereby this deflection increases with the frequency.

The resistive attenuation of a transmission line increases with the frequency as a result of this skin effect.

The skin depth (equivalent thickness of the layer in which current flows) can be determined using



VSWR-Value

The ratio between the value of the largest and the smallest voltages on a loss-free line is known as the ripple or voltage standing wave ratios (where 1 less than or equal to mless than or equal to 1 &inf;). The reciprocal value of the VSWR is known as the inverse voltage standing wave ratio m (where 0 less than or equal to mless than or equal to 1).

(VSWR = Voltage standing wave ratio)

The value of is linked with the => reflection coefficient r on s transmission line according to the equation

s= (1+lrl) / (1 - ltl)



Derating diagram
Measurement is according to DIN 41640 part 3 whereas all contacts are connected on series.

For test procedure - product no.
4008W8SCX44B3OX
and
4008W8PCX44B3OX


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