Synthesis of nonreciprocal lossless two-port networks using coupling matrix techniques

The coupling matrix technique has been mainly used to synthesize microwave filters with quasi-elliptic responses in the past. However, its application is not limited to filters, and may generally apply to all the two-port networks. All the schemes involving the coupling matrix technique reported to date have been concerned with reciprocal networks. In the area of nonreciprocal networks, the only reported synthesis technique consisted in directly cascading networks including gyrators to realize nonreciprocal lossless networks.