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Phys. Rev. E 77, 066602 (2008) [13 pages]

Nonlinear constructive interference in electrical lattices

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H. S. Bhat*
School of Natural Sciences, University of California, P. O. Box 2039, Merced, California 95344, USA

E. Afshari
Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA

Received 29 November 2007; revised 1 April 2008; published 6 June 2008

We analyze the constructive interference of input signals in nonlinear, discrete, two-dimensional media. The media consist of inductor-capacitor lattices with saturating, voltage-dependent capacitors. We find that nonlinearity significantly boosts the ability of such media to generate large-amplitude output signals from small-amplitude inputs. To understand this boosting, we develop a general perturbative method suitable for finding the steady-state solution of a damped N×N nonlinear lattice that is driven at a single frequency. We verify our theory using extensive numerical simulations.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.77.066602
DOI:
10.1103/PhysRevE.77.066602
PACS:
05.45.Yv, 84.40.Az, 63.20.Pw

*hbhat@ucmerced.edu

ehsan@ece.cornell.edu