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  • Maiwald, F.; Schlecht, E.; Maestrini, A.; Chattopadhyay, G.; Pearson, J.; Pukala, D.; Mehdi, I. (2002-08-22)
  • Mehdi, I.; Schlecht, E.; Maestrini, A.; Chattopadhyay, G.; Pukala, D. (2002-08-22)
  • Pearson, J. C.; Mehdi, I.; Schlecht, E.; Maiwald, F.; Maestrini, A.; Gill, J.; Martin, S.; Pukala, D.; Ward, J.; Kawamura, J.; McGrath, W. R.; Hatch, W. A.; Hardin, D.; LeDuc, H. G. (2002-08-24)
    The Heterodyne Instrument for Far Infrared (HIFI) on ESA's Herschel Space Observatory is comprised of five SIS receiver channels covering 480-1250 GHz and two HEB receiver channels covering 1410-1910 GHz. The NASA developed ...
  • Siegel, Peter H. (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004., 2004-06-21)
    An ultra-wide-dynamic-range heterodyne imaging system operating at 2.5 THz is described. The instrument employs room temperature Schottky barrier diode mixers and far infrared gas laser sources developed for NASA space ...
  • Sergeev, A. (2004-06-21)
  • Karasik, Boris S.; Sergeev, Andrei V. (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004., 2004-10-03)
    We present a concept for the hot-electron transition-edge sensor capable of counting THz photons. The main need for such a sensor is a spectroscopy on future space telescopes where a background limited NEP ~ 10ˉ²° W/H¹´² ...
  • Mehdi, Imran; Cooper, Ken; Siegel, Peter; Chattopadhyay, Goutam; Jung, Cecile; Siles, Jose; Reck, Theodore (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012., 2012-06-22)
  • Pearson, J. C.; Mehdi, I.; Ward, J. S.; Maiwald, F.; Ferber, R. R.; Leduc, H. G.; Schlecht, E. T.; Gill, J. J.; Hatch, W. A.; Kawamura, J. H.; Stern, J. A.; Gaier, T. C.; Samoska, L. A.; Weinreb, S.; Bumble, B.; Pukala, D. M.; Javadi, H. H.; Finamore, B. P.; Lin, R. H.; Dengler, R. J.; Velebir, J. R.; Luon, E. M.; Tsan, R.; Peralta, A .; Wells, M.; Chun, W.; Zmuidzinas, J.; Karpov., A.; Phillips, T. G.; Miller, D.; Maestrinia, A. E.; Erickson, N.; Swift, G.; Liao, K. T.; Paquette, M. (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004., 2004-06-24)
    he Heterodyne Instrument for Far Infrared (HIFI) on ESA's Herschel Space Observatory utilizes a variety of novel RF components in its five SIS receiver channels covering 480- 1250 GHz and two HEB receiver channels covering ...
  • Mehdi, Imran (Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2017, 2017-11-13)
    THz heterodyne spectrometers, capable of providing spectral resolution of >106 and detection sensitivity in the parts-per-billion range, provide a unique capability for space exploration. The exact operating frequency and ...
  • Mehdi, I.; Chattopadhyah, G.; Schlecht, E.; Siegel, P. (2002-08-22)
    Frequency multiplier circuits based on planar GaAs Schottky diodes have made significant advances in the last decade. Useful power in the >1 THz range has now been demonstrated from a complete solid-state chain. This paper ...
  • Mehdi, I.; Chattapadhyay, G.; Schlecht, E.; Siegel, P. (2002-08-22)
  • Mehdi, Imran (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004., 2004-06-21)
    The last decade has seen a number of technological advancements that have now made it possible to implement fully solid state local oscillator chains up to 2 THz. These chains are composed of cascaded planar multiplier ...
  • Mehdi, Imran; Chattopadhyay, G.; Schlecht, E.; Ward, J.; Gill, J.; Maiwald, F.; Maestrini, A. (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006., 2006-06-11)
    Planar Schottky diode technology has been utilized to fabricate high-power broad-band monolithic multiplier circuits that can produce appreciable power well into the THz range. The chip fabrication technology that has been ...
  • Mehdi, Imran; Siegel, Peter (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004, 2004-09-22)
    Advances in the design and fabrication of very low capacitance planar Schottky diodes and millimeter-wave power amplifiers, more accurate device and circuit models for commercial 3-D electromagnetic simulators, and the ...
  • Siegel, Peter H.; Ward, John; Maiwald, Frank; Mehdi, Imran (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2007., 2007-03-01)
  • Pearson, J. C.; Drouin, B. J. (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006., 2006-02-14)
    Molecule specific astronomical observations rely on precisely determined laboratory molecular data for interpretation. The Herschel Heterodyne Instrument for Far Infrared, a suite of SOFIA instruments, and ALMA are each ...
  • Pickett, H. (1999-01-25)
    THz spectroscopy of the atmosphere has been driven by the need to make remote sensing measurements of OH.
  • Maiwald, Frank; Mehdi, Imran; Siegel, Peter (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2003., 2003-07)
  • Mehdi, Imran; Siles, Jose; Chen, Christine P.; Jornet, Josep M. (Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2018, 2018-11-06)
    As space instruments become ubiquitous along with advancing capabilities, one of the central challenge is to provide more efficient communication links, between the control center and the instrument or between a cluster ...