Surface acoustic wave device having interdigitated comb electrod

Details Surface acoustic wave device having interdigitated comb electrod Surface acoustic wave device having interdigitated comb electrod

1983-06-14

1986-08-05

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333154, 310313C, H03H 925

Patent

active

046045953

ABSTRACT:
A surface acoustic wave device disclosed herein has input and output electrodes (21, 22) one of which (21) comprises a first interdigital electrode (23) defining even components of a frequency response and a second interdigital electrode (24) defining odd components thereof, the second interdigital electrode (24) being disposed outside the envelope of the first interdigital electrode (23). A portion of the second interdigital electrode (24) is disposed within a non-overlapping region of the first interdigital electrode (23), that is a region outside the envelope of the first interdigital electrode (23) and especially a region environed with a straight line running through the top of the envelope in a direction parallel with the propagating direction of the surface waves.

REFERENCES:
patent: 4160219 (1979-07-01), Kuny
patent: 4206380 (1980-06-01), Hazama et al.
patent: 4420728 (1983-12-01), Bower

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