Convergence acceleration for simulated time‐reversal

Abstract

Purpose

The purpose of this paper is to report on the use of conjugate‐gradients (CG) as a means to accelerate the convergence of the iterative time‐reversal algorithm used for optimisation of electromagnetic devices.

Design/methodology/approach

The numerical time‐domain transmission line modelling method is used for time‐reversal optimisation. A comparison of the standard and CG time‐reversal is shown for two examples of microwave bandpass filter optimisation.

Findings

The paper demonstrates the time‐reversal optimisation that uses the CG matrix solver for perturbing the time reversal mirrors (TRM) fields.

Originality/value

The paper outlines the perturbation procedure of the CG time‐reversal and compares it to the standard time‐reversal optimisation. Two examples of microwave band pass filter optimisation have been considered and in each case it was demonstrated that CG time‐reversal significantly accelerates the optimisation process compared to the standard time‐reversal simulations.

Citation

Scott, I., Vukovic, A. and Sewell, P. (2009), "Convergence acceleration for simulated time‐reversal", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 28 No. 5, pp. 1290-1297. https://doi.org/10.1108/03321640910969539