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:
Nov. 21, 2017
Filed:
Apr. 12, 2017
Applicant:
Resonant Inc., Santa Barbara, CA (US);
Inventor:
Gregory L. Hey-Shipton, Santa Barbara, CA (US);
Assignee:
Resonant Inc., Santa Barbara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04M 1/00 (2006.01); H03H 9/64 (2006.01); H04B 1/3827 (2015.01); H04B 1/40 (2015.01);
U.S. Cl.
CPC ...
H03H 9/6409 (2013.01); H03H 9/6483 (2013.01); H04B 1/3833 (2013.01); H04B 1/40 (2013.01);
Abstract
Multi-band filters and communications devices are disclosed. A multi-band filter has a lower pass-band and an upper pass-band separated by an intervening stop-band. The multi-band filter includes a first ladder network and a second ladder network coupled in series. The first ladder network is configured to provide transmission zeros at frequencies below a lower edge of the lower pass-band and transmission zeros at frequencies above an upper edge of the upper pass-band. The second ladder network is configured to provide transmission zeros at frequencies within the intervening stop-band.