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:
Mar. 23, 2004
Filed:
Feb. 12, 2002
Applicant:
Inventors:
Assignee:
Nortel Networks Limited, St. Laurent, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/205 ; H03H 9/54 ; H03H 9/64 ; H03H 9/72 ; H03F 1/08 ;
U.S. Cl.
CPC ...
H03H 9/205 ; H03H 9/54 ; H03H 9/64 ; H03H 9/72 ; H03F 1/08 ;
Abstract
Acoustic resonators such as surface acoustic wave (SAW) devices and thin film bulk acoustic resonators (FBAR) can be configured to produce a band reject filter. Such a filter overcomes the insertion loss and power handling limitations of conventional band pass configurations and as such can be used in power amplifier and duplexer applications.