The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2001
Filed:
Feb. 26, 1999
Masao Takeuchi, Machida, JP;
Noritoshi Kimura, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A method for manufacturing a surface acoustic wave device including forming a single-phase unidirectional transducer based on calculating frequency responses of the positive and negative conversion losses along a surface acoustic wave propagation direction by coupling-of-modes equations, where A,(x) and A,(x) are the mode amplitudes of the surface acoustic waves propagated respectively in the positive direction (forward direction) and negative direction (backward direction) of the x axis and where boundary conditions of the initial and final analytical points are respectively expressed by A,(0)=0 and A,(L)=0. The method includes setting A,(0)=0 (or A,(L)=0) as a boundary condition, setting A,(0) (or A,(L)) to an arbitrary value as an initial value of A,(0) (or A,(L)), and calculating coupling-mode-equations while repeatedly altering A,(0) (or A,(L)) until A,(L)=0 (or until A,(0)=0).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile