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. 09, 2015
Filed:
Jun. 22, 2011
Applicants:
Kazumi Shiikuma, Tokyo, JP;
Makoto Hayakawa, Tokyo, JP;
Inventors:
Kazumi Shiikuma, Tokyo, JP;
Makoto Hayakawa, Tokyo, JP;
Assignee:
NEC CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/68 (2006.01); H03F 3/189 (2006.01); H01P 5/02 (2006.01); H03F 1/02 (2006.01); H03F 1/56 (2006.01); H03F 3/60 (2006.01); H03F 3/20 (2006.01);
U.S. Cl.
CPC ...
H03F 3/189 (2013.01); H01P 5/02 (2013.01); H03F 1/0288 (2013.01); H03F 1/56 (2013.01); H03F 3/602 (2013.01); H03F 2200/111 (2013.01); H03F 2200/387 (2013.01); H03F 3/20 (2013.01); H03F 3/68 (2013.01);
Abstract
A Doherty amplifier includes an impedance transformer located between a load and a signal combining point of a carrier amplifier and a peak amplifier. The impedance transformer subjects, at frequencies including a fundamental frequency and at least a second harmonic frequency thereof, an impedance Zo of the load to impedance transformation into a value lower than Zo, for example, (½)×Zo, over a wide band or a plurality of frequency bands.
Shiikuma, Kazumi. (2015). High frequency power amplifier (U.S. Patent No. 9054647). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9054647
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile