Two-tone intermodulation distortion in high-Tc superconducting thin films

Altan M. Ferendeci; Shih Lin Lu; Charles M. Jackson; Kul B. Bhasin; Carl H. Mueller

doi:10.1117/12.166147

4 January 1994 Two-tone intermodulation distortion in high-T_c superconducting thin films

Altan M. Ferendeci, Shih Lin Lu, Charles M. Jackson, Kul B. Bhasin, Carl H. Mueller

Proceedings Volume 2156, High Tc Microwave Superconductors and Applications; (1994) https://doi.org/10.1117/12.166147
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Two tone intermodulation distortion (IMD) in High Tc YBCO superconducting films on LaAl₂O₃ substrates are experimentally studied. Experiments performed on straight through microstrip transmission lines indicate highly non-linear signal transmission characteristics for these films. In addition to the third harmonic, higher order intermodulation products are also observed even without using any resonant structures. The observed intermodulation distortion shows a minimum as a function of temperature for a given input power level. Close to Tc, in addition to a large increase in IMD, higher order intermodulation products also become appreciable. SEM photographs are used to relate the surface topology of the films and the grain boundaries to the observed IMD. Thin films deposited by various techniques are investigated.

Citation Download Citation

Altan M. Ferendeci, Shih Lin Lu, Charles M. Jackson, Kul B. Bhasin, and Carl H. Mueller "Two-tone intermodulation distortion in high-T_c superconducting thin films", Proc. SPIE 2156, High Tc Microwave Superconductors and Applications, (4 January 1994); https://doi.org/10.1117/12.166147

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