TY - JOUR
T1 - Simulations of microwave characteristics of high-temperature superconducting microstrip lines by using an empirical two-fluid model
AU - Wu, Chien Jang
N1 - Funding Information:
Manuscript received December 1, 1999; revised January 22, 2002. The review of this paper was supervised by R. Withers. This work was supported by the National Science Council of the Republic of China under Contract NSC-90-2112-M-150-001.
PY - 2002/6
Y1 - 2002/6
N2 - A numerical analysis of the microwave propagation characteristics of a high-temperature superconducting microstrip transmission line is presented. It is based on the transmission line theory and empirical two-fluid model which appropriately incorporates the quasiparticle scattering and residual loss of the superconductor. First, the calculated attenuation constant and phase velocity are compared with those predicted by the conventional two-fluid model for a YBa 2Cu 3O 7-δ microstrip line with a linear substrate, lanthanum aluminate, LaAlO 3. Next, we have specifically investigated the effects of nonlinear substrate such as strontium titanate, SrTiO 3, on the attenuation constant and phase velocity. The tunable feature of such a microwave device owing to the nonlinear dielectric ferroelectric is illustrated and discussed.
AB - A numerical analysis of the microwave propagation characteristics of a high-temperature superconducting microstrip transmission line is presented. It is based on the transmission line theory and empirical two-fluid model which appropriately incorporates the quasiparticle scattering and residual loss of the superconductor. First, the calculated attenuation constant and phase velocity are compared with those predicted by the conventional two-fluid model for a YBa 2Cu 3O 7-δ microstrip line with a linear substrate, lanthanum aluminate, LaAlO 3. Next, we have specifically investigated the effects of nonlinear substrate such as strontium titanate, SrTiO 3, on the attenuation constant and phase velocity. The tunable feature of such a microwave device owing to the nonlinear dielectric ferroelectric is illustrated and discussed.
KW - Ferroelectric
KW - High-temperature superconductor
KW - Microstrip transmission line
KW - Propagation characteristics
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U2 - 10.1109/TASC.2002.1020336
DO - 10.1109/TASC.2002.1020336
M3 - Article
AN - SCOPUS:0036613480
SN - 1051-8223
VL - 12
SP - 1776
EP - 1783
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2
ER -