High-temperature superconductors and mm wave technology: a challenge and perspectives

Regarding the general potential of high-temperature superconductors (HTS) for applications in passive microwave (MW) device and systems. However practically all the authors did not touch the question concerning prospects of HTS-based passive components in millimeter (mm) wave range. As a rule developments of MW components are carried out in a direction of gradual shorting of wavelength, i.e. in the direction of mm wave range. Since the main advantage of superconductors contrary to normal conductors decreases with shorting of wavelength, the problem arises concerning determination or at least evaluation of the upper frequency boundary where advantages of HTS-based separate devices and systems in a whole remain. In the present work an attempt is made to have analyzed potential of HTS and to search attractive areas of HTS-based component application in mm wave range.