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Observation of tunable nonlinear effects in an analogue of superconducting composite right/left hand filter.

Liu H, Lei J, Jiang H, Guan X, Ji L, Ma Z - Sci Rep (2015)

Bottom Line: Artificial structures with negative permittivity or permeability have attracted significant attention in the science community because they provide a pathway for obtaining exotic electromagnetic properties not found in natural materials.However, any future effort in creating tunable structures would require knowledge of nonlinear properties.Its nonlinear effects on temperature and power are studied by theoretical analysis and experiments.

View Article: PubMed Central - PubMed

Affiliation: Department of Information Engineering, East China Jiaotong University, Nanchang, 330013, China.

ABSTRACT
Artificial structures with negative permittivity or permeability have attracted significant attention in the science community because they provide a pathway for obtaining exotic electromagnetic properties not found in natural materials. At the moment, the great challenge of these artificial structures in microwave frequency exhibits a relatively large loss. It is well-known that superconducting thin films have extremely low surface resistance. Hence, it is a good candidate to resolve this constraint. Besides, the reported artificial structures with negative permittivity or permeability are mainly focusing on linear regime of wave propagation. However, any future effort in creating tunable structures would require knowledge of nonlinear properties. In this work, a tunable superconducting filter with composite right/left-hand transmission property is proposed and fabricated. Its nonlinear effects on temperature and power are studied by theoretical analysis and experiments.

No MeSH data available.


Related in: MedlinePlus

Complex propagation constant γp.γ is the complex propagation constant of the fabricated HTS CRLH filter. p is the total length of CRLH filter. α is attenuation factor and β is propagation constant. The red and blue curves are propagation constant (βp) and attenuation factor (αp), respectively. Circuits parameters are as follows: LR = 4.66 nH, LL = 1.55 nH, CR = 5.475 pF, CL = 1.9 pF, CG = 12 pF, Rs = 0.
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f4: Complex propagation constant γp.γ is the complex propagation constant of the fabricated HTS CRLH filter. p is the total length of CRLH filter. α is attenuation factor and β is propagation constant. The red and blue curves are propagation constant (βp) and attenuation factor (αp), respectively. Circuits parameters are as follows: LR = 4.66 nH, LL = 1.55 nH, CR = 5.475 pF, CL = 1.9 pF, CG = 12 pF, Rs = 0.

Mentions: where parameter A is a matrix element of ABCD-matrix (see Methods). p is the total length of CRLH filter. It is a small constant. α is attenuation factor and β is propagation constant. Complex propagation constant γ of the fabricated HTS CRLH filter is shown in Fig. 4.


Observation of tunable nonlinear effects in an analogue of superconducting composite right/left hand filter.

Liu H, Lei J, Jiang H, Guan X, Ji L, Ma Z - Sci Rep (2015)

Complex propagation constant γp.γ is the complex propagation constant of the fabricated HTS CRLH filter. p is the total length of CRLH filter. α is attenuation factor and β is propagation constant. The red and blue curves are propagation constant (βp) and attenuation factor (αp), respectively. Circuits parameters are as follows: LR = 4.66 nH, LL = 1.55 nH, CR = 5.475 pF, CL = 1.9 pF, CG = 12 pF, Rs = 0.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4595847&req=5

f4: Complex propagation constant γp.γ is the complex propagation constant of the fabricated HTS CRLH filter. p is the total length of CRLH filter. α is attenuation factor and β is propagation constant. The red and blue curves are propagation constant (βp) and attenuation factor (αp), respectively. Circuits parameters are as follows: LR = 4.66 nH, LL = 1.55 nH, CR = 5.475 pF, CL = 1.9 pF, CG = 12 pF, Rs = 0.
Mentions: where parameter A is a matrix element of ABCD-matrix (see Methods). p is the total length of CRLH filter. It is a small constant. α is attenuation factor and β is propagation constant. Complex propagation constant γ of the fabricated HTS CRLH filter is shown in Fig. 4.

Bottom Line: Artificial structures with negative permittivity or permeability have attracted significant attention in the science community because they provide a pathway for obtaining exotic electromagnetic properties not found in natural materials.However, any future effort in creating tunable structures would require knowledge of nonlinear properties.Its nonlinear effects on temperature and power are studied by theoretical analysis and experiments.

View Article: PubMed Central - PubMed

Affiliation: Department of Information Engineering, East China Jiaotong University, Nanchang, 330013, China.

ABSTRACT
Artificial structures with negative permittivity or permeability have attracted significant attention in the science community because they provide a pathway for obtaining exotic electromagnetic properties not found in natural materials. At the moment, the great challenge of these artificial structures in microwave frequency exhibits a relatively large loss. It is well-known that superconducting thin films have extremely low surface resistance. Hence, it is a good candidate to resolve this constraint. Besides, the reported artificial structures with negative permittivity or permeability are mainly focusing on linear regime of wave propagation. However, any future effort in creating tunable structures would require knowledge of nonlinear properties. In this work, a tunable superconducting filter with composite right/left-hand transmission property is proposed and fabricated. Its nonlinear effects on temperature and power are studied by theoretical analysis and experiments.

No MeSH data available.


Related in: MedlinePlus