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Series and parallel arrays of annular antennas optimized for 350 GHz frequency band with SINIS (Superconductor Insulator Normal metal Insulator-Superconductor) bolometers and cryogenically cooled receivers for series of modern SubTHz observatories have been designed, fabricated and studied. The detectors are matched to incoming beam by an immersion sapphire lens. In the low background power case a voltage responsivity approaches 1.5*10 V/W corresponding to NEP=10 W/Hz. The current responsivity for parallel array is 4*10 A/W and shot noise limited intrinsic noise equivalent power is NEP=4*10 W/Hz. At the background radiation temperature level of 2.7 K the responsivity to variations of radiation temperature is over 75 V/K. The intrinsic time constant of the bolometer array is 0.1-0.2 s.

Arrays of annular cryogenic antennas with SINIS bolometers and cryogenic receivers for SubTHz observatories