A NEW MATERIAL CLASSIFICATION OF LOSSY METAMATERIALS

Abstract

The propagation constant is extended and derived for lossy metamaterials in which epsilon&apos;(r) < 0 and mu&apos;(r) > 0 (ENG), epsilon&apos;(r) > 0 and mu&apos;(r) < 0 (MNG), and epsilon&apos;(r) < 0 and mu&apos;(r) < 0 (DNG). Regardless of the magnitudes of a epsilon &apos;&apos;(r) DPS mu &apos;&apos;(r). DPS materials are a RH medium and DNG materials are a LH medium. However, SNG materials become a RH medium when the sign of (epsilon&apos;(r) x mu &apos;&apos;(r) + epsilon &apos;&apos;(r) x mu&apos;(r)) is positive and a LH medium when the sign is negative. A new diagram is proposed to classify any lossy metamaterial into either RH or LH medium. (C) 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:445-447, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25687