Time-Domain Analysis of RF and Microwave Autonomous Circuits by Vector Fitting-Based Approach

Abstract

This work presents a new method for the analysis of RF and microwave autonomous circuits directly in the time-domain, which is the most effective approach at simulation level to evaluate nonlinear phenomena. For RF and microwave autonomous circuits, time-domain simulations usually experiment convergence problems or numerical inaccuracies due to the presence of distributed elements, preventing de-facto their use. The proposed solution is based on the Vector Fitting algorithm applied directly at circuit level. A case study relative to a RF hybrid oscillator is presented for practical demonstration and evaluation of performance reliability of the proposed method.

Stability Characterizing Function for Electronic Circuit Design Based on Frequency-Domain Analysis With Parametric Damping

“…This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/ Time-domain circuit simulation (e.g., [27], [28], [29], [30], [31], [32], [33], [34]) represents an interesting alternative environment for the development of stability analysis methods. Some of them are based on the approximation of passive distributed circuit subsections in terms of lumped-element equivalent networks (e.g., [32], [33], [34]).…”