A parallel time-domain adaptive integral method based hybrid field-circuit simulator

Time-domain methods are highly suited for analyzing electromagnetic phenomena involving time-varying and nonlinear structures. An FFT-based scheme, the time-domain adaptive integral method (TD-AIM) is hybridized with a SPICE-like circuit simulator to allow for the analysis of electromagnetic phenomena involving large-scale nonlinearly loaded structures. The coupled nonlinear system of equations is solved using a Newton-Raphson algorithm at each time step. The proposed methodology is compared to the recently developed hybrid plane-wave time-domain accelerated TDIE-circuit solver described by K. Aygün et al. (see IEEE Trans. Microwave Theory and Techniques, vol.52, no.2, p.573-83, 2004). Even though both methods focus on hybrid fast TDIE-circuit analysis schemes, and therefore are similar in nature, there are differences. Our method has advantages which show that it is better suited for analyzing microwave circuits.