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admittance (Y)

The admittance (Y) is the reciprocal of the impedance (Z). It is a complex quantity resulting from 1/Z.

Like impedance, admittance consists of an effective component, the frequency-independent effective conductance (G), and the imaginary, frequency-dependent component, the reactive conductance (jB). The geometric addition of both components forms the admittance or the apparent conductance.

This quantity is used, among other things, to determine the frequency-dependent conductance of RF components such as antennas, connectors or high-frequency cables, whose apparent conductance is shown in Smith charts.

Englisch: admittance - Y
Updated at: 10.03.2010
#Words: 83
Links: impedance (Z), frequency (f), conductance,
Translations: DE

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