Title :
A planar SIS mixer for 400-500 GHz
Author :
Nitsch, Ralf ; Jacobs, Karl
Author_Institution :
I. Phys. Inst., Koln Univ., Germany
Abstract :
We present a new planar SIS mixer for array applications in the 400-500 GHz range. The mixer consists of a double dipole antenna connnected to a pair of superconducting tunnel junctions by a novel tuning and matching structure. It is mounted in the focal plane of a silicon parabola collimating the broad double dipole beams into beams with f-numbers of ≈13. Four mixers were built in an array configuration on a single substrate and two of them were tested. The receiver DSB noise temperatures are below 300 K in the 456-492 GHz range. The best results are 180 K and 163 K respectively at 473 GHz
Keywords :
dipole antennas; impedance matching; submillimetre wave antennas; submillimetre wave mixers; superconducting arrays; superconducting microwave devices; superconductor-insulator-superconductor mixers; tuning; 400 to 500 GHz; Si; Si parabola; Si-Nb; THF; array applications; beam collimation; broad double dipole beams; double dipole antenna; matching structure; planar SIS mixer; receiver DSB noise temperatures; superconducting tunnel junctions; tuning structure; Capacitance; Coatings; Collimators; Dielectric losses; Dielectric substrates; Dipole antennas; Distributed parameter circuits; Manufacturing; Silicon; Superconducting transmission lines;
Conference_Titel :
Terahertz Electronics Proceedings, 1998. THz Ninety Eight. 1998 IEEE Sixth International Conference on
Conference_Location :
Leeds
Print_ISBN :
0-7803-4903-2
DOI :
10.1109/THZ.1998.731685
