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TZID:Asia/Kolkata
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DTSTART:19451014T230000
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BEGIN:VEVENT
DTSTAMP:20231019T052511Z
UID:79D125F7-9929-414F-8DF1-43F033BE226C
DTSTART;TZID=Asia/Kolkata:20231012T110000
DTEND;TZID=Asia/Kolkata:20231012T123000
DESCRIPTION:An array of perfectly electric conducting (PEC) obstacles in a 
 host dielectric medium\nmodifies the constitutive parameters of the compos
 ite medium or metamaterial.\nTypically\, for such a composite medium\, the
  effective (homogenized) parameters are\nestimated using the Lorentz model
 . The Lorentz model indicates that inclusion of PEC\nobstacles in a host m
 edium introduces both electric and magnetic polarizabilities that\nmodify 
 the permittivity and permeability tensors of the composite medium. On the 
 other\nhand\, the Floquet eigenmodal analysis shows that the PEC obstacles
 \, while modifying\nthe permittivity tensor\, have no effect on the permea
 bility tensor. Hence\, as a corollary\,\nFloquet model leads us to conclud
 e that a negative permeability metamaterial using\nPEC obstacles is not po
 ssible to obtain. Interestingly\, numerical results obtained from\nfull wa
 ve analyses of metamaterial-slabs support the Floquet model. We will prese
 nt the\nLorentz and Floquet models and examine the source of inaccuracy in
  the Lorentz\nmodel. We will discuss the characteristic features of metama
 terials made with\nnon-resonant and resonant types of obstacles. Numerical
  results obtained from four\nindependent models will be compared and discu
 ssed. In light of Maxwell’s equations\,\nwe will scrutinize the rational
 ity of the claims of “negative-refraction” metamaterials.\n\nCo-sponso
 red by: IEEE AP-MTTS SBC IIT Kharagpur\n\nSpeaker(s): Arun K. Bhattacharyy
 a\, \n\nRoom: NKN Room\, Bldg: E&ECE Department\, Kharagpur\, West Bengal\
 , India\, IIT Kharagpur\, Kharagpur\, West Bengal\, India\, 721302
LOCATION:Room: NKN Room\, Bldg: E&ECE Department\, Kharagpur\, West Bengal\
 , India\, IIT Kharagpur\, Kharagpur\, West Bengal\, India\, 721302
ORGANIZER:ieee.apmtts.sbciitkgp@gmail.com
SEQUENCE:24
SUMMARY:Can perfectly electric conducting obstacles modify the permeability
  of metamaterial?
URL;VALUE=URI:https://events.vtools.ieee.org/m/377525
X-ALT-DESC:Description: <br /><p>An array of perfectly electric conducting 
 (PEC) obstacles in a host dielectric medium<br />modifies the constitutive
  parameters of the composite medium or metamaterial.<br />Typically\, for 
 such a composite medium\, the effective (homogenized) parameters are<br />
 estimated using the Lorentz model. The Lorentz model indicates that inclus
 ion of PEC<br />obstacles in a host medium introduces both electric and ma
 gnetic polarizabilities that<br />modify the permittivity and permeability
  tensors of the composite medium. On the other<br />hand\, the Floquet eig
 enmodal analysis shows that the PEC obstacles\, while modifying<br />the p
 ermittivity tensor\, have no effect on the permeability tensor. Hence\, as
  a corollary\,<br />Floquet model leads us to conclude that a negative per
 meability metamaterial using<br />PEC obstacles is not possible to obtain.
  Interestingly\, numerical results obtained from<br />full wave analyses o
 f metamaterial-slabs support the Floquet model. We will present the<br />L
 orentz and Floquet models and examine the source of inaccuracy in the Lore
 ntz<br />model. We will discuss the characteristic features of metamateria
 ls made with<br />non-resonant and resonant types of obstacles. Numerical 
 results obtained from four<br />independent models will be compared and di
 scussed. In light of Maxwell&rsquo\;s equations\,<br />we will scrutinize 
 the rationality of the claims of &ldquo\;negative-refraction&rdquo\; metam
 aterials.</p>
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