Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

1980-09-25

1982-05-18

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

333154, 333196, H03H 925, H03H 964, H03H 9145

Patent

active

043307671

ABSTRACT:
A surface acoustic wave device is provided which includes a phase-modulated interdigital electrode and a uniform interdigital electrode having an equal electrode finger width and spacing, and the device is arranged to avoid occurrence of deviation of the actual performance thereof from the designed one. To this end, the electrode finger width and spacing of the uniform interdigital electrode are determined such that the ratio of metal surface to unmetallized substrate area in the phase-modulated interdigital electrode becomes equal to the ratio of metal surface to unmetallized substrate area in the uniform inter-digital electrode.

REFERENCES:
patent: 3845419 (1974-10-01), Nudd
patent: 3979702 (1976-09-01), Hunsinger et al.

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