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Josephson admittance spectroscopy was applied for spectral analysis of broadband log-periodic sinuous antenna with modified log-periodic geometry, which provides pronounced resonances. A correspondence of experimentally observed spectral features to the results of numerical simulations was established.
Josephson detectors based on YBa2Cu3O7-x [100]-tilt bicrystal junctions were fabricated and their frequency-selective and broadband modes of operation were studied at terahertz frequencies. The resistances of the [100]-tilt junctions were in the range of 1-200 Ohm and their characteristic voltages were up to 8 mV at 4.2 K. Values of the responsivity up to at radiation frequency of 0.7 THz were demonstrated...
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