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Related Experiment Videos

Development of a SAW duplexer with one-chip isolation circuits.

Yongrae Roh1, Seunghee Lee

  • 1School of Mechanical Engineering, Kyungpook National University, Sankyukdong 1370, Bukgu, Daegu 702-701, South Korea. yryong@knu.ac.kr

Ultrasonics
|March 30, 2004
PubMed
Summary

We developed a new single-chip Surface Acoustic Wave (SAW) duplexer fabricated on lithium tantalate. This design simplifies manufacturing while maintaining high performance for conventional SAW duplexers.

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Acoustics

Background:

  • Conventional Surface Acoustic Wave (SAW) duplexers face fabrication challenges.
  • Integrating transmit (Tx) and receive (Rx) filters with isolation networks is complex.
  • Existing designs may compromise performance due to manufacturing constraints.

Purpose of the Study:

  • To propose novel one-chip type SAW duplexer structures.
  • To integrate Tx and Rx SAW ladder filters and isolation networks onto a single substrate.
  • To overcome fabrication difficulties of conventional SAW duplexers.

Main Methods:

  • Fabrication of new SAW duplexer structures on a 36 degrees LiTaO(3) piezoelectric substrate.
  • Integration of Tx and Rx SAW ladder filters and isolation networks.

Related Experiment Videos

  • Verification through numerical simulation and experimental testing.

    • Main Results:

    • Successful development of a one-chip type SAW duplexer structure.
    • Demonstration of overcome fabrication difficulties compared to conventional designs.
    • Achieved performance comparable to conventional SAW duplexers.

    Conclusions:

    • The proposed one-chip SAW duplexer structure offers a viable solution to manufacturing challenges.
    • This integrated design maintains the performance standards of traditional duplexers.
    • Numerical simulations and experiments validate the effectiveness of the new structure.