my slides.pptx
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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