FIELD: physics.
SUBSTANCE: thermally stable narrow-band surface acoustic wave (SAW) filter has an acoustic line - piezoelectric substrate with interdigital transducers formed on its surface and placed in a housing; on the reverse side of the substrate there is a flat plate with a hole in the middle and holes on the edges, wherein the plate is attached to the acoustic line on the position of the centre hole by a "solid" - hard adhesive with coefficient of linear thermal expansion and simultaneously to the mounting seat of the housing, attached through the holes on the edges to the acoustic line and simultaneously to the mounting seat of the housing by a rubber-like adhesive with high coefficient of linear thermal expansion, wherein the piezoelectric substrate rests on crosspieces on the ends of the flat plate which prevent bending of the substrate.
EFFECT: smaller size of the thermally stable surface acoustic wave filter, higher vibration resistance and thermal stability.
5 cl, 4 dwg
