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:
Apr. 13, 2004
Filed:
Nov. 16, 2001
Applicant:
Inventor:
Kenneth Meade Lakin, Redmond, OR (US);
Assignee:
TFR Technologies, Inc., Bend, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/48 ; H03H 9/56 ; H03H 9/70 ;
U.S. Cl.
CPC ...
H03H 9/48 ; H03H 9/56 ; H03H 9/70 ;
Abstract
A microwave filter made of acoustically coupled, bulk wave acoustic resonators. The resonators utilize piezoelectric materials sandwiched between conducting electrodes. Layers of material that intervene between the resonators control the amount of acoustic coupling between the resonators and the amount of coupling is selected to obtain desired filter characteristics. The resonators and the intervening layers may be supported upon a substrate by means of a series of layers of material that function as an acoustic mirror or reflector.