Limits...
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

Simulation and experimental results for the fabricated HTS CRLH filter.The red curves are electromagnetic (EM) simulation results by using Sonnet software. The blue curves on left axis are the measured results at Tc = 77 K. S-parameter S21 is insertion loss and S11 is return loss. The background colors (yellow and bluish green) are in accordance with Fig. 4.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4595847&req=5

f2: Simulation and experimental results for the fabricated HTS CRLH filter.The red curves are electromagnetic (EM) simulation results by using Sonnet software. The blue curves on left axis are the measured results at Tc = 77 K. S-parameter S21 is insertion loss and S11 is return loss. The background colors (yellow and bluish green) are in accordance with Fig. 4.

Mentions: This HTS CRLH filter is designed to operate at ultra-high-frequency (UHF) band and is characterized from 1.43 to 2.13 GHz. Its −3 dB bandwidth is 40%. Its overall size is 15 mm × 16.9 mm (about 0.229 λg by 0.258 λg, where λg is the guided wavelength at center frequency of passband). Measured results (at the critical temperature Tc = 77 K) are illustrated in Fig. 2. Measured in-band insertion loss is less than 0.22 dB and return loss is greater than 12.7 dB. It shows a good transmission performance.


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)

Simulation and experimental results for the fabricated HTS CRLH filter.The red curves are electromagnetic (EM) simulation results by using Sonnet software. The blue curves on left axis are the measured results at Tc = 77 K. S-parameter S21 is insertion loss and S11 is return loss. The background colors (yellow and bluish green) are in accordance with Fig. 4.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f2: Simulation and experimental results for the fabricated HTS CRLH filter.The red curves are electromagnetic (EM) simulation results by using Sonnet software. The blue curves on left axis are the measured results at Tc = 77 K. S-parameter S21 is insertion loss and S11 is return loss. The background colors (yellow and bluish green) are in accordance with Fig. 4.
Mentions: This HTS CRLH filter is designed to operate at ultra-high-frequency (UHF) band and is characterized from 1.43 to 2.13 GHz. Its −3 dB bandwidth is 40%. Its overall size is 15 mm × 16.9 mm (about 0.229 λg by 0.258 λg, where λg is the guided wavelength at center frequency of passband). Measured results (at the critical temperature Tc = 77 K) are illustrated in Fig. 2. Measured in-band insertion loss is less than 0.22 dB and return loss is greater than 12.7 dB. It shows a good transmission performance.

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