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Directional coupler using acoustic surface waves

Directional coupler using acoustic surface waves

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© The Institution of Electrical Engineers
Published

The properties of interdigital transducers have been used to construct a directional coupler. The coupler consists basically of an array of eight transducers etched from an aluminium film deposited on a lithium-niobate substrate. Experimentally, a directivity of 17 dB was obtained at 75 MHz.

Inspec keywords: ultrasonic transducers; directional couplers

Other keywords: directional counters; acoustic surface waves; 75 MHz; aluminium film; interdigital transducers; lithium-niobate substrate; piezoelectric substrate; ultrasonic transducers

Subjects: Acoustic wave devices

References

    1. 1)
      • W.R. Smith , H.M. Gerard , J.H. Collins , T.M. Reeder , H.J. Shaw . Analysis of interdigital surface wave transducers by use of an equivalent circuit model. IEEE Trans. , 856 - 864
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