A New Control Method for Optimizing Load Current Instantaneous Response Using a Voltage Buffer in an LDO Regulator and Results of Experimental Implementation

Document Type : Original Article

Authors

Abstract

This paper presents a rigorous and comprehensive method for retrieving the electromagnetic constitutive parameters of a slab of metamaterial from the measurement or numerically calculation of scattering parameters. The main problem in this process is the doubtfulness exists in the phase of the transmitted field or the correct branch of logarithmic function appears in relevant equations.The novelty introduced here is on applying the Kramers-Kronig(K-K) relation to the imaginary part of refractive index and therefore obtaining its real part with less ambiguity. In Addition, by means of the mentioned approach one can obtain full retrieval results even where the imaginary part of electric permittivity or magnetic
permeability becomes negative. Indeed, this method can be applied to an extensive range of materials independent of their operational frequency.

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Volume 2, Issue 3 - Serial Number 7
November 2011
Pages 7-20
  • Receive Date: 23 August 2011
  • Revise Date: 08 December 2019
  • Accept Date: 09 October 2011
  • First Publish Date: 22 November 2011