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Ferroelectrics Volume 304, 2004 - Issue 1
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Original Articles

Phase Tunable SAW Device on LiNbO3 Substrate

KUO-SHENG KAO Department of Electrical Engineering National Sun Yat-Sen University, Kaohsiung, Taiwan, R.O.C.
,
CHUNG-JEN CHUNG Department of Electrical Engineering National Sun Yat-Sen University, Kaohsiung, Taiwan, R.O.C.
,
YING-CHUNG CHEN Department of Electrical Engineering National Sun Yat-Sen University, Kaohsiung, Taiwan, R.O.C.
&
CHIEN-CHUAN CHENG Department of Electronic Engineering De Lin Institute of Technology, Tucheng, Taipei, Taiwan, R.O.C.
Pages 139-142 | Received 01 Aug 2003, Accepted 01 Jan 2004, Published online: 07 Sep 2010
 
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Abstract

The interdigital transducers (IDTs) were fabricated on the surface of the z-cut LiNbO3 substrates. Top and bottom electrodes are evaporated on the propagation path of surface acoustic wave. In order to investigate the effects of electric field on SAW signal, the measurement in time domain using a network analyzer is carried out, in which, the center frequency of the device is fixed. From the experimental results, it reveals that the phase of signal shifts linearly with the variation of bias voltage. The phase shift of SAW could be controlled by the biased electric field, and thus, the various time delays could be obtained.

Acknowledgement

The National Science Council, the Republic of China, supported this research under contract no. NSC 90-2216-E-110-025.

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