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Parametric Amplification with Surfac...

Lu, Ting.

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Parametric Amplification with Surface Acoustic Waves.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Parametric Amplification with Surface Acoustic Waves./
作者:	Lu, Ting.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	53 p.
附註:	Source: Masters Abstracts International, Volume: 79-12.
Contained By:	Masters Abstracts International79-12.
標題:	Electrical engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10826887
ISBN:	9780438037915

Parametric Amplification with Surface Acoustic Waves.
Lu, Ting.

Parametric Amplification with Surface Acoustic Waves. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 53 p.

Source: Masters Abstracts International, Volume: 79-12.

Thesis (M.S.)--University of California, Los Angeles, 2018.

This item must not be sold to any third party vendors.

This work is to explore the time-reversal symmetry breaking employing an acoustic wave platform through space-time parametric modulations, for the purpose of developing nonlinear devices such as amplifiers and mixers. The strength of acoustic wave platform is that it can obtain great leverage on the slow velocity and small wavelength of acoustic waves at RF to minimize the footprint of transmission lines. To realize parametric amplification, nonlinear Surface Acoustic Wave(SAW) grating is employed to pump a dynamic biasing electric field into the piezoelectric material to couple the pump electromagnetic wave to the propagating surface acoustic waves in the condition of phase matched. Two different ways to achieve nonlinear change of piezoelectric coefficient and elastic stiffness are proposed: 1) Material nonlinearity using ferromagnetic material like BST; 2) Geometrical nonlinearity using the coupling between vertical and parallel stiffness. The fractional modulation of elastic stiffness is approximate 4% in the first approach and can reach 10% or even higher in the second approach. Simulation validation using COMSOL demonstrates the parametric fixing effects produced on the Surface Acoustic Wave devices. Fabrication and characterization of Surface Acoustic Wave delay lines are also provided.

ISBN: 9780438037915Subjects--Topical Terms:

649834
Electrical engineering.

Parametric Amplification with Surface Acoustic Waves.
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502 $a Thesis (M.S.)--University of California, Los Angeles, 2018.
506 $a This item must not be sold to any third party vendors.
520 $a This work is to explore the time-reversal symmetry breaking employing an acoustic wave platform through space-time parametric modulations, for the purpose of developing nonlinear devices such as amplifiers and mixers. The strength of acoustic wave platform is that it can obtain great leverage on the slow velocity and small wavelength of acoustic waves at RF to minimize the footprint of transmission lines. To realize parametric amplification, nonlinear Surface Acoustic Wave(SAW) grating is employed to pump a dynamic biasing electric field into the piezoelectric material to couple the pump electromagnetic wave to the propagating surface acoustic waves in the condition of phase matched. Two different ways to achieve nonlinear change of piezoelectric coefficient and elastic stiffness are proposed: 1) Material nonlinearity using ferromagnetic material like BST; 2) Geometrical nonlinearity using the coupling between vertical and parallel stiffness. The fractional modulation of elastic stiffness is approximate 4% in the first approach and can reach 10% or even higher in the second approach. Simulation validation using COMSOL demonstrates the parametric fixing effects produced on the Surface Acoustic Wave devices. Fabrication and characterization of Surface Acoustic Wave delay lines are also provided.
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