0.34- THz High-Temperature Superconducting Josephson-Junction Mixer with Superior Noise and Conversion Performance

Abstract

We present, in this work, a new thin-film antenna-coupled high-temperature superconducting (HTS) Josephson-junction terahertz (THz) mixer that demonstrates superior performance at frequencies around 0.34 THz. A novel dual-meander-slot thin-film antenna is designed to significantly improve the antenna-junction impedance matching and thus more efficient coupling of the THz signal power. Theoretical and experimental investigations are carried out to evaluate the mixer performance. This mixer can be applied to the sensitive THz wireless receivers.

Radiation effects in high-temperature YBa2Cu3O7-x superconducting thin films with low-energy protons for space radiation environments

“…And in 2016, a practical high-temperature superconductor filter front-end subsystem has been successfully launched into orbit. High-temperature superconducting terahertz devices [16,17] are particularly suitable for broadband mobile communications and space communications, which conform the next generation of ground satellite communications (mobile phones) and earth-orbiting satellites microwave communications designated by the international communications union. However, high-temperature superconductors are affected by space radiation, which penetrates the shells of equipment such as space detectors, artificial satellites, and space coolers.…”