| Zugriffsnummer | 26312 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Microwave properties of microstrip line circuits used for Josephson voltage standard arrays at 70 GHz |
| Autor(in); Institution |
Schubert, Marco; 2.4, Quantenelektronik, PTB-Braunschweig
Anders, Solveig; Institute of Photonic Technology (IPHT), Jena, GERMANY
Härtel, Enrico; Institute of Photonic Technology (IPHT), Jena, GERMANY
Wende, Gerd; Supracon AG, Jena, GERMANY
Hähle, R.; Institute of Photonic Technology (IPHT), Jena, GERMANY
Fritzsch, Ludwig; Institute of Photonic Technology (IPHT), Jena, GERMANY
Starkloff, Michael; Supracon AG, Jena, GERMANY
Springborn, Ulrike; 2.4, Quantenelektronik, PTB-Braunschweig
Müller, Franz; 2.4, Quantenelektronik, PTB-Braunschweig
Kohlmann, Johannes; 2.4, Quantenelektronik, PTB-Braunschweig
Meyer, Hans-Georg; Institute of Photonic Technology (IPHT), Jena, GERMANY
|
| Quelle/Jahr | Superconductor Science and Technology: 24 (2011), 8, 085006-1 - 085006-6 |
| ISSN | 0953-2048 (PRINT) ; 1361-6668 (ONLINE) |
| DOI | |
| Verlag | Bristol: IOP |
| Klassifikationscode | PACS: 84.40.Az ; PACS: 84.40.Dc |
| Freie Schlagworte | Josephson voltage standards ; Microwave behaviour of Josephson junctions ; Josephson junctions in microstrip lines ; Parasitic substrate mode in Silicon wafers |
| Zusammenfassung | The microwave properties of microstrip lines used for Josephson voltage standard circuits at frequencies from 70 to 75 GHz were investigated at a temperature of 4.2 K. Our measurements quantify the different loss sources. The excitation of a parasitic substrate mode is postulated, demonstrated by microwave modelling and confirmed by experiments. These modes dominate the losses for wafers with a thickness above 500 μm. The substrate modes can induce an inhomogeneous microwave distribution in the Josephson junction array, thereby causing poor operation of the voltage standard circuits. Silicon dioxide fabricated in various PECVD processes was used as the dielectric layer in the microstrip line circuits. Permittivity and losses of silicon dioxide and the silicon substrate were determined, as well as the surface resistance of niobium. |
Zitierung
Schubert, M., Anders, S., Härtel, E., Wende, G., Hähle, R., Fritzsch, L., Starkloff, M., Springborn, U., Müller, F., Kohlmann, J., & Meyer, H.-G. (2011). Microwave properties of microstrip line circuits used for Josephson voltage standard arrays at 70 GHz. Superconductor Science and Technology, 24(8), 085006-1–085006-6. https://doi.org/10.1088/0953-2048/24/8/085006