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This paper presents the design of a monolithic-integrated circularly-polarized antenna-coupled high-Tc superconducting terahertz harmonic mixer. The new mixer has a compact feature that all its relevant components are integrated on one tiny chip, and exhibits enhanced polarization orientation flexibility in coupling THz radiations. This mixer has the potential in practical THz wireless applications.
We describe here the realization of a terahertz (THz) imager based on a high-Tc superconducting (HTS) Josephson junction detector. The detector, made of an YBa2Cu3O7-x (YBCO) step-edge junction, is coupled to a thin-film antenna and a hemispheric silicon lens. Images of high visual quality are obtained at temperatures above 77 K. The results demonstrated the potential of a HTS superconducting detector...
We report continuing investigations into practical applications of the AC Josephson effect as the basis for a voltage-tunable radio-frequency oscillator. We have previously demonstrated experimentally that useful power levels (10 s of nW) and linewidths of a few kHz can be achieved in the heterodyne output from a high-temperature-superconducting resistive SQUID (HTS-RSQUID) operating in the frequency...
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