Microwave bulk acoustic delay device having two transducers on t

Details Microwave bulk acoustic delay device having two transducers on t Microwave bulk acoustic delay device having two transducers on t

1975-07-09

1976-12-07

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

With impedance matching

29 2535, 310 95, H03H 930, H01L 4108, H01L 4118, H01L 4122

Patent

active

039965350

ABSTRACT:
A wafer of lithium niobate metallized on both major surfaces is bonded to a magnesium aluminate spinel bulk acoustic delay line. The lithium niobate layer is divided into two separate electrically and mechanically isolated transducers using ion beam milling. The bulk acoustic delay line has a surface arranged to reflect a propagating acoustic wave generated by one of the divided transducers to the other of the transducers, the one transducer serving as an input and the other as an output. The acoustic delay line is suitable for broad band operation at microwave frequencies with at least 50 db isolation between the two ports.

REFERENCES:
patent: 3317862 (1967-05-01), Fitch
patent: 3582834 (1971-06-01), Hanover
Lewis, "Improved Microwave Acoustic Delay Lines Using Magnesium Aluminate Spinel" in Journal of Science and Technology vol. 39, No. 2 1972; pp. 91-94.

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