Examination of a microwave sensing system using superconducting devices

N. Sekiya, M. Mukaida, A. Saito, S. Hirano, S. Oshima

Research output: Contribution to journalConference articlepeer-review


We have designed and fabricated a microwave sensing system integrated with superconducting devices which can detect motion for crime prevention and security purposes. The system consists of a transmitting antenna, a receiving antenna, a power divider as a directional coupler, and a mixer. The antennas and the directional coupler were fabricated using 50-nm thick YBa 2Cu3O7-δ (YBCO) thin films. A superconducting antenna with a resonant frequency of 10.525 GHz and a superconducting directional coupler were designed and fabricated for the system. A Schottky barrier diode was used as a mixer. These devices were integrated and their operation as a sensor was examined. Comparisons of the output voltage of the IF signal amplifier showed that the superconducting integrated sensor system was superior to the normal conductor sensor.

Original languageEnglish
Pages (from-to)1622-1627
Number of pages6
JournalPhysica C: Superconductivity and its applications
Issue numberII
Publication statusPublished - 2005
Externally publishedYes
EventProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
Duration: Nov 23 2004Nov 25 2004

All Science Journal Classification (ASJC) codes

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


Dive into the research topics of 'Examination of a microwave sensing system using superconducting devices'. Together they form a unique fingerprint.

Cite this