%0 Thesis
%9 Dissertation
%A Muñoz Pradas, Pedro Pablo
%T Waveguide heterodyne mixers at THz-frequencies
%O superconducting hot electron bolometers on 2-m63m [2-mym] Si3N4 membranes for GREAT and CONDOR
%D 2007
%R 10.23689/fidgeo-89
%I Univ. Köln
%X Design and performance of waveguide mixers at 1.4 THz and 1.9 THz based on NbTiN phonon-cooled hot electron bolometers (HEB) fabricated on a 2 æm thick Si_3N_4 membrane. The membrane is bonded to a silicon frame in the mixer block using a flip chip process. Simulated RF coupling is compared with experimental results, showing good agreement. Receiver noise temperature measurements show uncorrected values of 1600 K at 1.4 THz and 2100 K at 1.9 THz, both at 1.5 GHz intermediate frequency. Device cooling on the membrane seems not to be problematic. The mixers are used in receivers for SOFIA (GREAT & CONDOR) and APEX (CONDOR).
%U http://hdl.handle.net/11858/00-1735-0000-0001-30DF-1
%~  FID GEO-LEO e-docs