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METAMATERIAL

Name: Sanchita Basak

Roll no. : 15EC63R20Department: E & ECESpecialiation: R! &

"icro#a$e

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%NDE

 %ntro'(ctionDe)nition o* metamaterials E+perimental 'emonstration o* le*t,han'e'ness E-(i$alent circ(it o* SRR ransmission line / approach e*t,han'e'ness *rom "a+#ells E-(ations Bo(n'ar con'itions Re$ersal o* 'oppler e4ect pplications o* metamaterials Re*erences

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hat is "etamaterial7

"etamaterials are arti)cial

E4ecti$el homo8eneo(s /

E+hi9it hi8hl (n(s(al properties /εr, μr < 0

e*t,an'e' str(ct(res /antiparallel phase an'8ro(p $elocities

E+hi9it 9ack#ar' #a$e propa8ation

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;ermitti$it,permea9ilit /६

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E+perimental 'emonstration o* le*t,han'e'ness

• Ne8ati$e ६ > positi$e = "" is metal thin,#ire/ str(ct(re

• Electric )el' E??@ /a+is o* the #ires• C(rrent is in'(ce' an' electric 'ipole is 8enerate'

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;ermitti$it, *re-(enc *(nction :,

here

%t is clear that<

hich re'(ces i* to

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;ositi$e ६< ne8ati$e = ""

•  his is achie$e' 9 metal split rin8resonator /SRR

• "a8netic )el' is perpen'ic(lar to theplane o* the rin8s

•

Resonatin8 c(rrent an' ma8netic 'ipolemoment is enerate'

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;ermea9ilit, *re-(enc *(nction :,

here

%t is note' that

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E-(i$alent Circ(it o* SRR :,

  Do(9le SRR con)8(ration 

Sin8le SRR con)8(ration

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!irst e+perimental str(ct(res

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 ransmission ine pproach

 

%ncremental circ(it mo'el *or a  hpothetical (ni*orm

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 here*ore phase $elocit an' 8ro(p$elocit are antiparallel

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e*t,han'e'ness *rom "a+#ellsE-(ations:,

et (s consi'er the plane #a$e

!or R me'i(m< ६< =0

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s *re-(enc is positi$e

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Since β F 0

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Bo(n'ar Con'itions :,

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t the inter*ace<

•

 an8ential components arecontin(o(s• Normal components are antiparallel

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Re$ersal o* 'oppler e4ect

  Con$entional< in aRe$erse'< in a

  R me'i(m me'i(m

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%n the *ar )el'

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pplications o* metamaterials:,

• ntennas

•

9sor9er

• S(perlens

• Seismic protection

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Re*erences• Smith, D. R., et al., Phys. Rev. Lett. (2000) 84, 4184

• Pendry, . !., et al., "### $rans. %i&r'. $he'ry $e&h. (1)4*, 20*+

• esela-', . ., S'v. Phys. /s. (18) 10, +0

• Shely, R. 3., et al., S&ien&e (2001) 22, **

• D. D. Stan&il. $he'ry ' %a-net'stati& 5aves, Srin-er6erla-, 17.

•  . !. Pendry, 3. . 'lden, D. . R'ins, and 5. . Steart.9L' re:;en&y lasm'ns in thin6ire str;&t;res, . Phys.='ndens. %atter, v'l. 10, . 4*8+>480,18.

•  . !. Pendry, 3. . 'lden, D. . R'ins, and 5. . Steart.9

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• D. R. Smith< . A. ;a'illa< D. C. ier< S. C. Nemat,Nasser< an' S.Sch(lt. Composite me'i(m #ith sim(ltaneo(sl ne8ati$epermea9ilit an' permitti$it