Multiple co-surface acoustic wave filters

Details Multiple co-surface acoustic wave filters Multiple co-surface acoustic wave filters

1980-07-03

1982-02-09

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313B, 331107A, 333154, 333196, H03H 9145, H03H 942, H03H 964, H03H 972

Patent

active

043152287

ABSTRACT:
Apparatus for providing a plurality of filtered outputs is described incorporating a substrate suitable for propagating surface acoustic waves having an input transducer, a first plurality of spaced-apart taps coupled together, a second plurality of spaced-apart taps coupled together where at least two of the second plurality of taps are positioned in spaces between the first plurality of taps.
The invention overcomes the problem of providing separate substrate surface area for each plurality of taps coupled together.

REFERENCES:
patent: 3736587 (1973-05-01), Bush et al.
patent: 3754192 (1973-08-01), Palfreeman
patent: 3831116 (1974-08-01), Davis, Jr. et al.
patent: 3852540 (1971-06-01), Adler et al.
patent: 3855548 (1974-12-01), Nandi et al.
patent: 3855556 (1974-12-01), Hartmann
patent: 4100498 (1978-07-01), Alsup et al.
Hartmann et al.--"Wideband unidirectional interdigital surface wave transducers", IEEE Transactions on Sonics and Ultrasonics, vol. SU-19, No. 3, Jul. 1972; pp. 378-381.

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