Stability Analysis of Nonlinear Microwave Circuits

The increasing use of high-frequency integrated circuits monolithic microwave integrated circuits (MMICs) in modern communications systems requires an accurate prediction of their response at the simulation stage because this technology does not allow any circuit modification after manufacturing. The microwave circuits are often designed using frequency-domain techniques, like harmonic balance. With this technique, only the steady state is analyzed, and the experimental solution may be very different from the simulated one. In nonlinear circuits, two or more steady-state solutions of same or different types may coexist for a given set of circuit-parameter values. The solutions may be stable (physically observable) or unstable. Because the transient is not simulated, harmonic balance can provide a solution towards which the system never evolves in time. Thus, it requires complementary stability analysis tools.

Từ khóa: Microwave Circuits, integrated circuits, mạch tích hợp, hệ thống liên lạc, frequency-domain techniques, mạch phi tuyến