Surface wave component

Details Surface wave component Surface wave component

1980-08-27

1982-08-10

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

310313B, 333193, H03H 9145, H03H 925, H03H 964, H03H 942

Patent

active

043440495

ABSTRACT:
A surface wave component has a pair of interdigital transducer comb structures carried spaced apart on a surface of a substrate which is carried on a base plate. In one embodiment, signal leads extend beneath the substrate to areas adjacent the rear portions of the comb structures and are capacitively coupled thereto via the substrate which is a dielectric. In another embodiment, inductive coupling loops interconnect the rear portions of the comb structures of a respective transducer and another inductive loop is carried on the opposite side of the substrate for signal coupling. In both embodiments both symmetrical and asymmetrical signal coupling is provided by utilizing a grounding plate or layer as a signal lead.

REFERENCES:
patent: 3582838 (1971-06-01), DeVries
patent: 3676721 (1972-07-01), Van Den Heuvel
patent: 3894251 (1975-07-01), Shibayama et al.
patent: 3904996 (1975-09-01), Rosenfeld
patent: 4035675 (1977-07-01), Malocha et al.
Toda et al.-"Lamb-Wave Device with Three Operation Modes", Electronics Letters, Nov. 23, 1978, vol. 14, No. 24, pp. 747-748.
Toda (Shinoda), "Lamb Wave Device for Amplitude Modulation", J. Acoust. Soc. Am. 65(2), Feb. 1979, pp. 537-540.

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