The Scattering Matrix is a linear algebraic formulation used in microwave network theory to characterize multiterminal networks by relating incident and reflected wave amplitudes at each port. This representation utilizes complex-valued coefficients defined under the assumption of time-harmonic fields, providing a rigorous description of signal flow without requiring internal knowledge of the device's topology or material properties. As the fundamental theoretical framework for high-frequency circuit analysis, it serves as the standard method for defining network parameters in electromagnetic field theory and system-level microwave engineering.
Prerequisite chain context: requires Microwave Network Analysis Using Scattering Parameters in Electromagnetic Engineering.