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Amato, M. J., Benford, D. J., Moseley, H. S., & Juan Roman. (2003). An engineering concept and enabling technologies for a large single aperture far-infrared observatory (SAFIR). In Proc. SPIE (Vol. 4850, pp. 1120–1131).
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Albert Betz, Rita Boreiko, Yongdong Zhou, Jun Jhao, Yusuf Selamet, Yong Chang, et al. (2003). HgCdTe photoconductive mixers for 3-15 terahertz. In Proc. 14th Int. Symp. Space Terahertz Technol. (pp. 102–111). Tucson, USA.
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Yorke, H. W., Paine, C. G., Bradford, C. M., Mark Dragovan, Nash, A. E., Dooley, J. A., et al. (2004). Thermal design trades for SAFIR architecture concepts. In Proc. SPIE (Vol. 5487, pp. 1617–1624).
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Tong, C. - Y. E., Meledin, D., Loudkov, D., Blundell, R., Erickson, N., Kawamura, J., et al. (2003). A 1.5 THz Hot-Electron Bolometer mixer operated by a planar diode based local oscillator. In IEEE MTT-S Int. Microwave Symp. Digest (Vol. 2, pp. 751–754).
Abstract: We have developed a 1.5 THz superconducting NbN Hot-Electron Bolometer mixer. It is operated by an all-solid-state Local Oscillator comprising of a cascade of 4 planar doublers following an MMIC based W-band power amplifier. The threshold available pump power is estimated to be 1 /spl mu/W.
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Meledin, D., Tong, C. Y. - E., Blundell, R., Kaurova, N., Smirnov, K., Voronov, B., et al. (2003). Study of the IF bandwidth of NbN HEB mixers based on crystalline quartz substrate with an MgO buffer layer. IEEE Trans. Appl. Supercond., 13(2), 164–167.
Abstract: In this paper, we present the results of IF bandwidth measurements on 3-4 nm thick NbN hot electron bolometer waveguide mixers, which have been fabricated on a 200-nm thick MgO buffer layer deposited on a crystalline quartz substrate. The 3-dB IF bandwidth, measured at an LO frequency of 0.81 THz, is 3.7 GHz at the optimal bias point for low noise receiver operation. We have also made measurements of the IF dynamic impedance, which allow us to evaluate the intrinsic electron temperature relaxation time and self-heating parameters at different bias conditions.
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