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Analysis of frequency division in microstrip circuits by using the FDTD method
Author(s) -
González Oscar,
Pereda José A.,
Suárez Almudena,
Grande Ana,
Vegas Ángel
Publication year - 2008
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.23352
Subject(s) - finite difference time domain method , microstrip , electronic engineering , electronic circuit , nonlinear system , microwave , parametric statistics , frequency domain , time domain , equivalent circuit , network analysis , electrical element , computer science , engineering , electrical engineering , telecommunications , physics , voltage , mathematics , optics , statistics , quantum mechanics , computer vision
The accurate time‐domain simulation of the nonlinear dynamics of circuits containing distributed elements is of great interest. Specially at high frequencies, it is essential to consider phenomena, such as crosstalk, packaging effects, and electromagnetic interaction between active and passive elements. These effects are mainly due to the distribute components of the circuit. Therefore, the accuracy in the instability or oscillation analysis of nonlinear circuits is often limited by the models used for such elements. Commercial simulators based on the equivalent‐circuit approach hardly take into account the mentioned effects. In this work, the finite‐difference time‐domain (FDTD) method is applied to the nonlinear simulation of a diode‐based microstrip circuit exhibiting a parametric frequency division by two. The FDTD method rigorously solves Maxwell's curl equations in the time domain providing a full‐wave characterization of the distributed elements of the circuit. In the example considered, a relatively low operating frequency has been selected to allow a reliable comparison between the results obtained by the proposed technique and those provided by a circuit‐based commercial simulator. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1300–1302, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23352