Group single-phase unidirectional transducers with 3/8.lambda.an

Details Group single-phase unidirectional transducers with 3/8.lambda.an Group single-phase unidirectional transducers with 3/8.lambda.an

1990-11-02

1991-12-17

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333196, 310313B, H03H 9145, H01L 4108

Patent

active

050737635

ABSTRACT:
Novel GSPUDT structures are disclosed with 3/8.lambda. and 5/8.lambda. group sampling with 3.lambda. and 5.lambda. group responses. Reflectionless or unidirectional transducers, and broadband notch elements are all implementable with these new configurations. These GSPUDTs are similar to the conventional SPUDT and the "Hopscotch" transducers in that single level versions are reflectionless. Unidirectional characteristics are only obtainable from a two-level structure.

REFERENCES:
patent: 3792381 (1974-02-01), Bristol
patent: 3946342 (1976-03-01), Hartmann
patent: 3979702 (1976-09-01), Humsinger et al.
patent: 4353046 (1982-10-01), Hartmann
patent: 4866325 (1989-09-01), Kodama et al.
patent: 4902925 (1990-02-01), Wright
patent: 4910839 (1990-03-01), Wright

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