Open AccessEstimation of HTS electrodes properties for use in piezoelectric resonators
Author(s) -
T. Nurgaliev,
Milena Beshkova
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1492/1/012016
Subject(s) - resonator , materials science , electrode , electrical impedance , piezoelectricity , microwave , optoelectronics , transmission line , q factor , limiting , resonance (particle physics) , superconductivity , acoustics , electrical engineering , composite material , condensed matter physics , telecommunications , physics , computer science , mechanical engineering , particle physics , quantum mechanics , engineering
The microwave (MW) impedance of piezoelectric (PE) resonators with high-temperature superconducting (HTS) and with metal electrodes operating at a longitudinal acoustic waves (AW) frequency of ~2 GHz was modeled using Mason’s and the acoustic transmission line models. The MW impedances of the electrodes were also included into the model and the modeling parameters were chosen so as to be close to those of AlN (PE part of the resonator) and of HTS YBCO, Ag, and Pt (electrodes). It was shown that the limiting Q -factor value due to electric losses in the electrodes (computed under the assumption of small losses in the PE) is very high (~6×10 5 ) if even very thin (20 nm) HTS electrodes are used in the resonator at 77 K. The limiting Q -factor value is several thousand in the case of using similar metal electrodes. Thus, the HTS YBCO electrodes can be considered as attractive alternatives for application in PE resonators at low temperatures as they are characterized by low MW losses and affect weakly the resonance frequency.