| Autor: |
R.A. Linke, T.C.L.G. Sollner, David P. Woody, Thomas G. Phillips, G. J. Dolan |
| Rok vydání: |
1981 |
| Předmět: |
|
| Zdroj: |
IEEE Transactions on Microwave Theory and Techniques. 29:87-91 |
| ISSN: |
0018-9480 |
| DOI: |
10.1109/tmtt.1981.1130300 |
| Popis: |
Superconducting tunnel junctions have been used as the nonlinear element for mixing at a signal frequency of 115 GHz. The experimental results are compared with predictions of a theoretical analysis based on the quantum theory of mixing of J. R. Tucker. Qualitative agreement is obtained and suggestions are made for quantitative reconciliation. The junctions were small area (/spl equiv/0.4mu m/sup 2/) with normal resistances of 60 to 100 omega and capacitance approximately 20 fF. Measured sensitivity (T/ sup SSB/sub MXR/=62 K, L/sub c/=7.6 dB) implies receiver noise temperatures superior to the best receivers now in use at this frequency. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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