S.A.W. fused-silica reflective-array compressor

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S.A.W. fused-silica reflective-array compressor

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© The Institution of Electrical Engineers
Published

A surface-wave reflective-array compressor using edge-bonded transducers and a fused-silica substrate is described. A flat amplitude response over a 60 MHz bandwidth about a 100 MHz centre frequency has been obtained by weighting the groove depth. This is in good agreement with the theoretical calculated transfer function involving a δ function method. Insertion loss is 25 dB and a pulse-compression loop has shown a compression ratio of nearly equal to 1.800.

Inspec keywords: acoustic surface wave devices; data compression

Other keywords: insertion loss; transfer function; pulse compression loop; reflective array compressor; acoustic surface wave data compressors; fused silica substrate; edge bonded transducers

Subjects: Acoustic wave devices

References

    1. 1)
      • Williamson, R.C.: `Large time–bandwidth-product devices achieved through the use of surface-acoustic-wave reflection gratings', IEE Conf. Publ. 109, 1973, p. 181–190, Component performance and system applications of surface acoustic wave devices.
    2. 2)
      • D.W. Bakken , P.C. Meyer . Sidelobe reduction in reflective s.a.w. pulse compressors without external filtering. Electron. Lett. , 278 - 279
    3. 3)
      • R.C. Williamson , H.I. Smith . (1973) IEEE Trans..
    4. 4)
      • Li, R.C.M., Melngailis, J.: Proceedings of ultrasonics symposium, 1973, p. 503–505.
    5. 5)
      • Lardat, C.: Proceedings of ultrasonics symposium, 1974, Milwaukee.
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