Low-loss unidirectional SAW filters using integrated microinductors

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Low-loss unidirectional SAW filters using integrated microinductors

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A SAW filter (using GUDTs for excitation and detection) has been described, requiring no external discrete components for the matching and the phase shifting networks. Using this design the filter can be fabricated on a single chip of substrate using the integrated-circuit fabrication procedures. The theoretical analysis has been done using the crossfield equivalent-circuit model of the filter and the results are in good correspondence with the experimental results.

Inspec keywords: inductors; passive filters; surface acoustic wave devices

Other keywords: SAW filters; crossfield equivalent-circuit model; group-type unidirectional transducers; integrated microinductors; single-chip substrate; integrated-circuit fabrication procedures; passive filters

Subjects: Acoustic wave devices; Passive filters and other passive networks

References

    1. 1)
      • Yamanouchi, K., Nyffeler, F., Shibayama, K.: `Low insertion loss elastic surface wave filter using group-type unidirectional interdigital transducer', IEEE Ultrasonics Symposium Proceedings, September 1975, p. 317–321.
    2. 2)
      • K. Yamanouchi , J.K. Gautam , T. Meguro . New phase shifting technique for group-type unidirectional transducers used in surface acoustic wave filters. Electron. Lett. , 168 - 169
    3. 3)
      • H.G. Dill . Designing inductors for thin film applications. Electron. Des. , 52 - 59
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