MICROWAVE DETECTOR RESPONSE OF THE JOSEPHSON JUNCTION ARRAYS

Microwave detector response eta for three types of superconducting structures: single edge-type Josephson junction, array of series connected junctions and array of RF series and DC parallel connected junctions have been investigated in the frequency range 35 - 120 GHz. Experimental dependence of eta vs biasing voltage is mainly determined by the interaction of junctions in array. The "Selective" response, that means narrow linewidth of Josephson radiation, has been observed for third type of superconducting structures in small magnetic field changing the phase shift between near placed junctions. These arrays have the advantage in coupling with the external microwave system.