Definition of Models of Elements in Linear Periodically Time-Varying Circuits in Frequency Domain

The article proposes a way to reduce the cost of computer time needed to form a mathematical model of the linear periodically time-varying circuit in the form of a symbolic system of linear algebraic equations, which is formed by L.A. Zadeh's equation and the frequency symbolic method for the frequency domain. The concept of a time-varying matrix model of conductivity of the individual elements of a circuit was introduced in the form of some matrix. On the basis of such models the system of linear algebraic equations of the linear periodically time-varying circuit is formed much faster and by usual rules, for example, as by the rules of a method of nodal voltages for the circles with constant parameters. The results of computer experiments are given. The considered a time-varying matrix models are convenient to use while designing the radio engineering devices that are modeled by the linear periodically time-varying circuits, and, in particular, the devices of noise-tolerant covert special purpose radio engineering systems.