Presentation 1998/9/17
THEORETICAL ANALYSIS OF A PIEZOELECTRIC THIN FILM RESONATOR WITH ACOUSTIC QUARTER-WAVE MULTILAYERS
Hirofumi KANBARA, Kiyoshi NAKAMURA,
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Abstract(in English) The resonator consisting of a piezoelectric film on alternately laminated low and high acoustic impedance layers seems to be useful as a piezoelectric resonator for use in a very high frequency range from 500MHz to over ten GHz. This resonator is theoretically analysed using an equivalent circuit model taking account of acoustic loss and electrode thickness. It is shown that the Q approaches to that of the piezoelectric film with increasing layer number of multilayers. Even if the layer number is large enough, the admittance response disagrees with that of the piezoelectric film with traction-free surfaces and K_ is somewhat lower than that of the raction-free case. The simulation on the scatter of resonator properties due to layer thickness deviationn shows that the Q is hardly degraded by the layer thickness deviation.
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Keyword(in English) Piezoelectric resonator / Multilayers / Electromechanical coupling factor / ZnO
Paper # US98-43
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Committee US
Conference Date 1998/9/17(1days)
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Registration To Ultrasonics (US)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) THEORETICAL ANALYSIS OF A PIEZOELECTRIC THIN FILM RESONATOR WITH ACOUSTIC QUARTER-WAVE MULTILAYERS
Sub Title (in English)
Keyword(1) Piezoelectric resonator
Keyword(2) Multilayers
Keyword(3) Electromechanical coupling factor
Keyword(4) ZnO
1st Author's Name Hirofumi KANBARA
1st Author's Affiliation Department of Electrical Communication Engineering Graduate School of Engineering, Tohoku University()
2nd Author's Name Kiyoshi NAKAMURA
2nd Author's Affiliation Department of Electrical Communication Engineering Graduate School of Engineering, Tohoku University
Date 1998/9/17
Paper # US98-43
Volume (vol) vol.98
Number (no) 270
Page pp.pp.-
#Pages 7
Date of Issue