FIRST IMPLEMENTATION OF A SUPERCONDUCTING INTEGRATED RECEIVER AT 450 GHZ

An integrated quasioptical receiver consisting of a planar double dipo le antenna, superconductor-insulator-superconductor mixer and a superc onducting local oscillator (LO) with matching circuits has been design ed, fabricated and tested in the frequency range 360-490 GHz. A flux-f low oscillator (FFO) based on unidirectional and viscous flow of magne tic vortexes in a long Josephson tunnel junction, is employed as a loc al oscillator. All components of the receiver are integrated on a 4 mm X4 mmX0.2 mm crystalline quartz substrate using a single Nb-AlOx-Nb tr ilayer. The lowest DSB noise temperature of 470-560 K has been achieve d within a frequency range of 425-455 GHz. (C) 1996 American Institute of Physics.