High bulk mode rejection surface wave device

Details High bulk mode rejection surface wave device High bulk mode rejection surface wave device

1974-03-14

1976-02-03

Borchelt, Archie R.

Wave transmission lines and networks

Coupling networks

With impedance matching

310 98, 333 72, H03H 902, H03H 926, H03H 930, H04R 1710, 310

Patent

active

039367746

ABSTRACT:
Disclosed is a surface wave device comprising one transducer having its fundamental resonant frequency at a subharmonic of the device operating frequency and a second transducer having its fundamental resonant frequency at the device operating frequency. Both transducers respond to surface waves at the operating frequency. Only the harmonic operated transducer responds to bulk waves at the operating frequency. Thus, signal coupled from one transducer to the other at the operating frequency contains no noise generated by bulk mode coupling.

REFERENCES:
patent: 3614463 (1971-10-01), Slobodnik, Jr.
patent: 3742396 (1973-06-01), Bahr et al.
Kuhn - "Enhanced Harmonic Response of an Interdigital Surface Acoustic Wave Transducer," in IEEE Tran. Electron Devices, Vol. ED-18 No. 6, June 1971; p. 395.
Engan - "Excitation of Elastic Surface Waves by Spatial Harmonics of Interdigital Transducers," in IEEE Trans. on Electron Devices, Vol. ED 16, No. 12, Dec. 1969; pp. 1014-1017.

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