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:
Jun. 02, 1998
Filed:
Nov. 26, 1996
Applicant:
Inventor:
Donald Allen, Gilbert, AZ (US);
Assignee:
Motorola Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ; H03H / ;
U.S. Cl.
CPC ...
333194 ; 333195 ; 3103 / ;
Abstract
An acoustic wave resonator is provided on a substrate of 45.degree. X-cut, Z-propagating lithium tetraborate. The resonator includes an inner and an outer set of reflective gratings. The inner set of reflective gratings is separated from the transducer of the resonator by a set of first gaps having a synchronous coupling value of n.lambda./2. The outer set of reflective gratings is separated from the inner set of reflective gratings by a set of second gaps having a peak coupling value of (4m+1).lambda./8. This configuration of the resonator produces a wide bandwidth frequency response substantially free of spurious frequency modes and having a good shape factor.