Cascade Synthesis of Nonreciprocal Lossless 2-Ports

Necessary and sufficient conditions for the synthesis of nonreciprocal lossless n-ports are shown also to be necessary and sufficient for the realization of a nonreciprocal lossless 2-port as a cascade of reciprocal and nonreciprocal lossless 2-ports. Nonreciprocal transmission zeros are realized by four canonic nonreciprocal 2-ports, which are analogous to the Darlington A, B, C, D networks that are required for realization of reciprocal transmission zeros.