16.7 STANDARD SYMMETRIC T AND PI EQUIVALENTS
Figure 16.7-1 shows a general T-network and Π-network using three independent impedances. They are not symmetric networks, but we assume that the impedances are passive impedances. From this section onwards, the qualifier ‘passive’ implies that the network contains only R, L, C and M type of elements. Then, they are reciprocal networks.
Any passive reciprocal two-port network requires only three parameters to describe it. The fourth parameter will be provided by the reciprocity condition. The network in Fig. 16.7-1(a), being a reciprocal one, has three parameters. It has three impedances also. Therefore, it must be possible to determine YA(s), YB(s) and Z(s) such that the resulting network has a pre-specified ...
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