Cascade synthesis of a class of multivariable positive real functions
M. Omair Ahmad, H.C. Reddy, V. Ramachandran, M.N.S. Swamy · IEEE Transactions on Circuits and Systems · 1978
Necessary and sufficient conditions are developed for the realization of a multivariable positive real function (MPRF) as the driving-point function of an extracted single-variable lossless two-port with a termination whose driving-point function is an MPRF in the rest of the variables as the load. Conditions are also obtained for the case when an extraction of a lossless two-port is possible in either of the two variablesP_{i}orp_{j}.