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:
Jan. 24, 2023
Filed:
Jan. 28, 2019
Applicant:
Rf360 Europe Gmbh, Munich, DE;
Inventor:
Roeland Heijna, Well, NL;
Assignee:
RF360 EUROPE GMBH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/04 (2006.01); H03F 3/24 (2006.01); H03H 9/64 (2006.01); H03H 9/25 (2006.01); H03H 9/145 (2006.01); H04B 1/10 (2006.01);
U.S. Cl.
CPC ...
H03H 9/6409 (2013.01); H03F 3/245 (2013.01); H03H 9/145 (2013.01); H03H 9/25 (2013.01); H04B 1/0475 (2013.01); H04B 1/1027 (2013.01); H03F 2200/451 (2013.01); H04B 2001/1063 (2013.01);
Abstract
A filter circuit comprises in a signal line a band filter (BF) allowing to let pass a useful frequency band and a notch filter (NF) circuited in series to the band filter for filtering out a stop band frequency. The notch filter comprises a series circuit of a number of parallel shunt elements (SE. . . SE) wherein each shunt element is shifted infrequency against the other shunt elements that the frequencies thereof are distributed (f. . . F) over a notch band. All shunt elements may be realized as a SAW one-port resonator (TR) including regions with different pitches.