Millimeter-wave sensitivity of YBCO grain boundary Josephson junctions coupled with coplanar waveguide-fed slot dipole antennas

Kensuke Nakajima, Norikazu Ebisawa, Hiroyasu Sato, Jian Chen, Tsutomu Yamashita, Yukio Sawaya

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Improvements in the coupling efficiency of millimeter wave quasioptically introduced to high-Tc Josephson junction detectors have been studied. Both increasing of junction resistance and implementation of a lower impedance antenna are required to improve the efficiency. We designed a coplanar waveguide feed slot dipole antenna as a low impedance antenna combined with the Josephson junction detectors. Improvements in the coupling efficiency due to decreasing of antenna impedance have been demon-strated and compared with numerically obtained results by the finite difference time domain method on the slot dipole antenna.

Original languageEnglish
Pages (from-to)549-551
Number of pages3
JournalIEEE Transactions on Applied Superconductivity
Volume15
Issue number2 PART I
DOIs
Publication statusPublished - 2005 Jun

Keywords

  • Finite difference time domain methods
  • High-temperature superconductors
  • Josephson junctions
  • Millimeter wave antennas
  • Millimeter wave detectors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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