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Fabrication of Surface Acoustic Wave Devices on Lithium Niobate
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Published on: June 18, 2020

Study of low insertion loss and miniaturization wavelet transform and inverse transform processor using SAW devices.

Hua Jiang1, Wenke Lu, Guoan Zhang

  • 1School of Information Science and Technology, Donghua University, Renmin North Rd. 2999, Shanghai, China. jianghua@ntu.edu.cn

Ultrasonics
|February 13, 2013
PubMed
Summary

We developed new surface acoustic wave (SAW) wavelet transform devices (WTDs) that are smaller and have lower insertion loss. These SAW devices enable efficient multi-scale wavelet processing.

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Materials Science

Background:

  • Wavelet transforms are crucial for signal processing, but traditional implementations face challenges in miniaturization and efficiency.
  • Surface Acoustic Wave (SAW) devices offer potential for compact and high-performance signal processing applications.

Purpose of the Study:

  • To propose and demonstrate a novel Surface Acoustic Wave (SAW) based processor for wavelet transform and inverse transform.
  • To achieve low insertion loss and miniaturization in SAW wavelet transform devices (WTDs).

Main Methods:

  • Utilizing a specific SAW device structure featuring two electrode-widths-controlled (EWC) single phase unidirectional transducers (SPUDT-SPUDT).
  • Incorporating an input withdrawal weighting interdigital transducer (IDT) and an output overlap weighting IDT.
  • Designing and measuring three experimental WTDs for different scales: 2(-1), 2(-2), and 2(-3).

Main Results:

  • Achieved minimum insertion losses of 5.49dB, 4.81dB, and 5.38dB for the tested devices, surpassing previous results.
  • Significantly reduced electrode width and number of electrode pairs, leading to device miniaturization.
  • Demonstrated the feasibility of implementing arbitrary multi-scale wavelet transforms.

Conclusions:

  • The proposed SAW device structure enables low insertion loss and miniaturized wavelet transform and inverse transform processors.
  • This technology is suitable for developing compact and efficient multi-scale signal processing systems.
  • The results indicate a promising advancement in SAW device applications for advanced signal processing.