Surface wave resonator cascade

Details Surface wave resonator cascade Surface wave resonator cascade

1979-09-28

1982-04-27

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333155, 333196, 350 9612, H03H 964, H03H 310, H03H 925, G02B 514

Patent

active

043273408

ABSTRACT:
Grating resonators for surface acoustic waves or surface optical waves are coupled in cascade via a track changer external to the resonator cavities. At least one grating of each resonator is partially transmissive in the resonant band, allowing the interchange of energy therebetween via the track changer. The track changer is comprised of either two or three reflective racks angled such that the energy reflected therein propagates along zero-temperature-coefficient paths. The three-rack, three-bounce U-path filter used as a track changer minimizes resonant energy losses due to variations in reflected wave angles from their designed values.

REFERENCES:
patent: 4013983 (1977-03-01), Hartemann
patent: 4027946 (1977-06-01), Tsai
patent: 4155056 (1979-05-01), Cross et al.

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