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Abstract: A low noise heterodyne receiver is being developed for the terahertz range using a phonon-cooled hot-electron bolometric mixer based on 3.5 nm thick superconducting NbN film. In the 1–2 GHz intermediate frequency band the double-sideband receiver noise temperature was 450 K at 0.6 THz, 700 K at 1.6 THz and 1100 K at 2.5 THz. In the 3–8 GHz IF band the lowest receiver noise temperature was 700 K at 0.6 THz, 1500 K at 1.6 THz and 3000 K at 2.5 THz while it increased by a factor of 3 towards 8 GHz.
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Gao, G. R., Hovenier, J. N., Yang, Z. Q., Baselmans, J. J. A., Baryshev, A., Hajenius, M., et al. (2005). A novel terahertz heterodyne receiver based on a quantum cascade laser and a superconducting bolometer. In Proc. 16th Int. Symp. Space Terahertz Technol. (pp. 19–23). Göteborg, Sweden.
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Gao, J. R., Hovenier, J. N., Yang, Z. Q., Baselmans, J. J. A., Baryshev, A., Hajenius, M., et al. (2005). Terahertz heterodyne receiver based on a quantum cascade laser and a superconducting bolometer. Appl. Phys. Lett., (86).
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Klaassen, T. O., Hovenier, J. N., Adam, A. J. L., Fischer, J., Jakob, G., Poglitsch, A., et al. (2004). Terahertz calorimetry for the Herschel Space Observatory. In Proc. 29th IRMMW / 12th THz (pp. 815–816).
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Merkel, H. F., Khosropanah, P., Sigfrid Yngvesson, K., Cherednichenko, S., Kroug, M., Adam, A., et al. (2001). An active zone small signal model for hot-electron bolometric mixers. In Proc. 12th Int. Symp. Space Terahertz Technol. (55). San Diego, CA, USA.
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