A broadband low noise SIS receiver for submillimeter astronomy.
01 January 1988
A quasioptical heterodyne receiver using a Pb alloy superconductor- insulator-superconductor (SIS) tunnel junction as the detector and a planar logarithmic spiral antenna for the RF coupling is described. Noise measurements were made at frequencies between 115 GHz and 761 GHz, yielding double sideband (DSB) noise temperatures ranging from 33K to 1100K.