8.2 PROPERTIES

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If one set of parameters is known, other parameters can be found using simple conversions. This can help when one set of parameters is needed, but cannot be measured directly.

Simple cases of networks are reciprocal and symetrical. When a network is neither of these, then it typically has active components, dependant sources, etc.

8.2.1 Reciprocal Networks

If a voltage is applied at one port, the short circuit current out the other port will be the same, regardless of which side the voltage is applied to.

Reciprocal networks are only possible when passive elements are used.

The parameters that indicate a reciprocal networks are,

With any reciprocal network we only need to find 3 of the four parameters, the last can be determined mathematically.

8.2.2 Symmetrical Networks

This is a special case of the reciprocal network where the input and output parameters are identical.

In addition to the reciprocal constraints, we must also consider,

Only two of these parameters need to be found to find the other two parameters.