Title :
High frequency fundamental mode resonators: equivalent electrical data dependence on electrode properties and blank surface
Author :
Seydel, Eberhard ; Weitzel, Lothar
Author_Institution :
KVG Kristall-Verarbeitung Neckarbischofsheim GmbH, Germany
Abstract :
High frequency fundamental mode crystals in the frequency range from 40 to 200 MHz show different electrical properties compared to conventional overtone quartz crystals in the same frequency range. They show lower electrical Q-values, different pullabilities and anharmonic modes as result of variations of the blank-electrode thickness ratio. We present the behaviour of anharmonic modes and C0/C1-ratios under various conditions using FEM methods, but also compare our results with experimental data of planoparallel crystals and inverted MESA-structured crystals, respectively
Keywords :
crystal resonators; 40 to 200 Hz; FEM; HF fundamental mode resonators; Q-values; anharmonic modes; blank surface; blank-electrode thickness ratio; complex compensation; electrode properties; equivalent circuit; equivalent electrical data dependence; frequency shift; inverted MESA-structured crystals; planoparallel crystals; quartz resonators; vibration modes;
Conference_Titel :
European Frequency and Time Forum, 1996. EFTF 96., Tenth (IEE Conf. Publ. 418)
Conference_Location :
Brighton
Print_ISBN :
0-85296-661-X
DOI :
10.1049/cp:19960002
