780-950 GHz WaveGuide Receiver Homepage

    Please note that the WG mixer has been replaced with a NbTiN based SIS twin-slot Mixer and new Optics in January 2000. The Receiver Noise Temperature was reduced by half (250K), which is primarily due to the ellimination of RF film loss in the high Tc NbTiN material.     

Related Papers:
J.W. Kooi, J. Kawamura, J. Chen, G. Chattopadhyay, J. R. Pardo, J. Zmuidzinas, T.G. Phillips, B. Bumble, J. Stern, and H.G. LeDuc.

Int J. IR and MM Waves,, Vol. 21, No. 9, Sept, 2000.

Kawamura, J., Chen, J., Miller, D., Kooi, J. , Zmuidzinas, J., Bumble, B., LeDuc, H. G., and Stern, J.A.,

Applied Physics Letters, 75, 4013-4015, 1999.

J. Zmuidzinas, J. W. Kooi, , J. Kawamura, G. Chattopadhyay, B. Bumble, H. G. LeDuc, and J. A. Stern,

Proc. SPIE, vol. 3357, pp. 53-61

Twin-Slot Mixer Information

     850 GHz Tuning Data:  

  • Frequency response of the 850 GHz receiver  
  • Properly tuned mixer at 800 and 900 GHz.  
  • Yfactor at 800 and 900 GHz.

         Mixer Related Images:  

  • Double-Slot Antennas on Extended Hemispherical and Elliptical Si Dielectric Lenses
         Daniel Filipovic, S. Gearhart, Gabriel Rebeiz  
  • Gausian Coupling efficiency calculations
         Daniel Filipovic, S. Gearhart, Gabriel Rebeiz  
  • 850 GHz NbTiN Twin-slot specifications  
  • Computer Simulations with NbTiN, Nb, and Al transmission lines  
  • Twin-Slot chip layout.  
  • Acad-cad drawing and Mixer block photo combined  
  • Auto-Cad view of cooled optics  
  • Niobium Loss above the Superconducting Energy Gap

         Cooled Optics:  

  • Twin-Slot mixer with optics mounted in cryostat (Jan. 2000).  
  • Waveguide mixer with optics mounted in cryostat (Aug. 1997).

         850 GHz Receiver Installation, Aug 1996 :  

  • Installing of 850 GHz Slot receiver on relay Optics(March 2000),  
  • Allen Guyer Installing 850 GHz WG receiver on relay Optics(Dec. 1996)  
  • 850 GHz receiver installation at the CSO (Aug 1996)  
  • 850 GHz complete receiver test at the CSO (Aug 1996)

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            Web Page created and last updated on March 20, 2001, by: Jacob W. Kooi