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Development of sis mixers for 1 thz
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Stern, J. A. Bumble, B. Kooi, J. Chattopadhyay, G. Zmuidzinas, J. LeDuc, H. G. |
| Copyright Year | 1998 |
| Description | SIS heterodyne mixer technology based on niobium tunnel junctions has now been pushed to frequencies over 1 THz, clearly demonstrating that the SIS junctions are capable of mixing at frequencies up to twice the energy gap frequency (4 Delta/h). However, the performance degrades rapidly above the gap frequency of niobium (2 Delta/h approx. 700 GHz) due to substantial ohmic losses in the on-chip tuning circuit. To solve this problem, the tuning circuit should be fabricated using a superconducting film with a larger energy gap, such as NbN; unfortunately, NbN films often have a substantial excess surface resistance in the submillimeter band. In contrast, the SIS mixer measurements we present in this paper indicate that the losses for NbTiN thin films can be quite low. |
| File Size | 584808 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19980019523 |
| Archival Resource Key | ark:/13960/t1vf1rz0b |
| Language | English |
| Publisher Date | 1998-01-01 |
| Access Restriction | Open |
| Subject Keyword | Electronics And Electrical Engineering Sis Superconductors Receivers Microstrip Devices Heterodyning Tunnel Junctions Nasa Space Programs Tuning Thin Films Superconducting Films Slot Antennas Niobium Compounds Mixing Circuits Submillimeter Waves Transformers Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
