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Attenuation and phase distortion in lossy acoustic-surface-wave multistrip couplers

Attenuation and phase distortion in lossy acoustic-surface-wave multistrip couplers

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© The Institution of Electrical Engineers
Published

An easy-to-use closed-form expression is reported which given the attenuation and the phase velocity of the acoustic-surface-wave eigenmodes of the uniform multistrip coupler consisting of resistive strips. A computer program has been written to implement the numerical calculation of output power, group delay and the sensitivity of output amplitude with respect to changes in the metallisation ratio.

Inspec keywords: acoustic surface waves; acoustic surface wave devices

Other keywords: eigenmodes; attenuation; output power; phase velocity; lossy acoustic surface wave multistrip couplers; computer program; group delay; metallisation ratio; sensitivity of output amplitude; phase distortion

Subjects: Acoustic wave devices

References

    1. 1)
      • Adler, E.L., Schwelb, O.: `Multitrack multistrip coupled devices', 75-1, Technical Report, 1975.
    2. 2)
      • Gordon, K.G.: `Multichannel analysis of surface-wave multistrip couplers', 1975, M. Eng. thesis, McGill University, Department of Electrical Engineering, Montreal.
    3. 3)
      • K. Blotekjaer , K.A. Ingebrigtsen , H. Skeie . Acoustic surface waves in piezoelectric materials with periodic metal strips on the surface. IEEE Trans. , 1139 - 1146
    4. 4)
      • Maerfeld, C., Tournois, P.: `An acoustic multistrip amplifier', Proceedings of ultrasonics symposium, 1972, , p. 171–176.
    5. 5)
      • H.C. Andrews , K.L. Caspari . A generalized technique for spectral analysis. IEEE Trans. , 16 - 25
    6. 6)
      • R.T. Gregory , D.L. Karney . (1969) , A collection of matrices for testing computational algorithms.
    7. 7)
      • Schwelb, O.: `Multistrip coupler computer program user manual', 75-4, Technical Report, 1975.
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