Surface-acoustic-wave device with a capacitance coupled between

Details Surface-acoustic-wave device with a capacitance coupled between Surface-acoustic-wave device with a capacitance coupled between

1988-11-21

1990-06-05

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313R, 310313B, H03H 964

Patent

active

049317555

ABSTRACT:
A surface-acoustic-wave device includes a surface-acoustic-wave filter with a capacitance connected in parallel between its input and output leads. The capacitance improves the attenuation characteristic of the device on the high-frequency side of the center frequency.

REFERENCES:
patent: 3582840 (1971-06-01), DeVries
patent: 4247836 (1981-01-01), Redwood et al.
patent: 4314215 (1982-02-01), Tanji et al.
patent: 4492940 (1985-01-01), Hikita
patent: 4649357 (1987-03-01), Nagai et al.
Plass, K. G., "Acoustic Surface wave Band-Stop Filter For UHF Frequencies" 1973 European Microwave Conf., vol. II; Brussels, Belgium; 4-7 Sep. 1973.
"IEEE Transactions on Microwave Theory and Techniques"; vol. Mit-17, No. 11; Nov. 1969.
"Surface Acoustic Wave"; Denshi Tsushin Gakki; Nov. 15, 1983; p. 191.

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