Surface acoustic wave device and communication device containing the same
AssigneeMurata Manufacturing Co., Ltd.
InventorMinefumi Ouchi
Life of this patent
Estimating the term…
Abstract
A surface acoustic wave device includes a plurality of interdigital electrode portions provided so as to have a balanced-unbalanced conversion function. A ratio N2/N1 is the range of about 50% to about 70%, where N1 represents the total number of electrode fingers of an interdigital electrode portion connected on a balanced signal terminal side, and N2 represents the total number of electrode fingers of the interdigital electrode portion connected on the unbalanced signal side, and the meshing width (W) of the interdigital electrode portions is in the range of about 43 λ to about 58 λ in which λ is the wavelength of a surface acoustic wave.
Claims23
A surface acoustic wave device comprising:
- a plurality of interdigital electrode portions provided so as to have a balanced-unbalanced conversion function;
- wherein
- a ratio N2/N1 is in the range of about 50% to about 70%, where N1 represents the total number of electrode fingers of one of said plurality of interdigital electrode portions that is connected with a balanced signal terminal side, and N2 represents the total number of electrode fingers of another one of said plurality of interdigital electrode portions that is connected with the unbalanced signal side;
- and
- a meshing width W of the plurality of interdigital electrode portions is in the range of about 43 λ to about 58 λ, where λ is the wavelength of a surface acoustic wave.
A surface acoustic wave device comprising:
- a plurality of interdigital electrode portions provided so as to have a balanced-unbalanced conversion function;
- wherein
- a ratio N2/N1 is in the range of about 50% to about 70%, where N1 represents the total number of electrode fingers of one of said plurality of interdigital electrode portions that is connected with a balanced signal terminal side, and N2 represents the total number of electrode fingers of another one of said plurality of interdigital electrode portions that is connected with the unbalanced signal side.
Dependencies are inferred from the claim text.