Microwave Quenching in DC-Biased Coplanar Waveguide Based on ${YBa}_{2}{Cu}_{3}{O}_{7-\delta}$ Thin Film
| Autor: | A. A. Lavrinovich, A. I. Gubin, Svetlana Vitusevich, Nickolay T. Cherpak |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Quenching
Materials science High-temperature superconductivity business.industry Coplanar waveguide Direct current Pulse duration 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials law.invention law 0103 physical sciences Optoelectronics Insertion loss Electrical and Electronic Engineering Thin film 010306 general physics 0210 nano-technology business Microwave |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 26:1-4 |
| ISSN: | 1558-2515 1051-8223 |
| DOI: | 10.1109/tasc.2016.2537138 |
| Popis: | In this paper, we report on the results of features in the discovered effect of a strong change in the microwave losses (quenching) in HTS-based coplanar waveguide (CPW) at certain values of the input power Pin and direct current (dc) I dc . Two waveguides were studied: CPW-150 and CPW-75, fabricated of epitaxial 150and 75-nm YBCO films. The insertion loss of CPW IL = 10 lg (P out /P in ) was measured versus both the operating temperature and the bias dc current I dc when a fixed level of the input X-band pulsed MW signal P in was applied. Here P out is the power measured at the CPW output. A pulse duration Ti was 5 μs with pulse repetition period T = 40 μs. Experiments showed a noticeable difference in specific values of I* = I dc corresponding to the P in -dependent quenching phenomenon in CPW-150 and CPW-75. With a weak input signal, the difference in behavior of CPWs is anticipated, i.e., quenching occurs at a lower current for thinner film. For P in > 1 W the situation is opposite, i.e., quenching for CPW-150 takes place at a lower I*. This is explained by stronger microwave heating of CPW-150. |
| Databáze: | OpenAIRE |
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