Title:
ACOUSTIC SURFACE WAVE DEVICE
Document Type and Number:
Japanese Patent JPS5941915
Kind Code:
A
Abstract:
An acoustic surface wave device comprising a piezoelectric substrate provided with an input transducer (2), an output transducer (4) and a compact reflective multistrip coupler (6) in which the strips of each pair of comparatively widely spaced strips (7 or 8) in one array of mutually parallel strips are connected to respective strips of a pair of comparatively narrowly spaced strips (8 or 7) in the other array. The wide and narrow spacings alternate along each array. The improvement provides further electrodes 9 located in the relatively wide spaces in each array and electrically interconnected so as to effect a transfer of signal currents along each array and from one array to the other. The device improves efficiency, reduces insertion loss and improves the shape of the pass band.
Inventors:
JIYON SHIYOFUIIRUDO
IAN FURIN
ROBAATO JIYON MAAREI
IAN FURIN
ROBAATO JIYON MAAREI
Application Number:
JP12111083A
Publication Date:
March 08, 1984
Filing Date:
July 05, 1983
Export Citation:
Assignee:
PHILIPS NV
International Classes:
H03H9/25; H03H3/08; H03H9/145; H03H9/64; (IPC1-7): H03H9/25
Attorney, Agent or Firm:
Akihide Sugimura
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