Superconductor technology: apparatus – material – process – High temperature – per se
Reexamination Certificate
2007-12-11
2007-12-11
Kopec, Mark (Department: 1751)
Superconductor technology: apparatus, material, process
High temperature , per se
C505S856000, C505S866000, C505S703000, C333S161000, C333S0990MP, C338S325000
Reexamination Certificate
active
10702573
ABSTRACT:
A signal switching device is disclosed that is capable of transmitting signals with less signal loss while securing a good isolation characteristic. The signal switching device includes a first section formed from a superconducting material connected to a first transmission path. The first section has a smaller cross section at the input end than at the output end or, the signal switching device may include a first section formed from a superconducting material connected to a first transmission path in series, and a second section formed from a superconducting material connected to a second transmission path in parallel. The cross section of the second section is smaller than that of the second transmission path. The length of the second transmission path is determined in such a way that an input impedance of the second transmission path is sufficiently large when the second section is in a superconducting state.
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Hirota Tetsuo
Kawai Kunihiro
Koizumi Daisuke
Narahashi Shoichi
Satoh Kei
Kopec Mark
NTT DoCoMo Inc.
Vijayakumar Kallambella
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