Insertion Loss

Insertion Loss

Die Einfügedämpfung (engl. Insertion Loss, IL) gibt die Abschwächung eines Signals durch ein Bauteil an, das in einen Signalweg eingefügt wird. Dabei kann es sich beispielsweise um einen Filter oder auch eine Steckverbindung handeln.

Die Einfügedämpfung beschreibt das Verhältnis zwischen ankommender und durchgelassener Leistung \frac{P_{in}}{P_{out}} .

Da die Einfügedämpfung in dB angegeben wird, wird folgende Formel verwendet: a_I=10\cdot log\frac{P_{in}}{P_{out}} \quad \mathrm{ dB}

Bei Filtern und Kopplern wird die Einfügedämpfung meist in Abhängigkeit vom Frequenzbereich ermittelt, der vom Nutzsignal benutzt wird.

Siehe auch


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