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. 12, 2010
Filed:
Feb. 20, 2008
Youngoo Yang, Gyeonggi-do, KR;
Xi Yao, Gyeonggi-do, KR;
Hyun Chul Park, Gyeongsangnam-do, KR;
Sung Wook Kwon, Seoul, KR;
Youngoo Yang, Gyeonggi-do, KR;
Xi Yao, Gyeonggi-do, KR;
Hyun Chul Park, Gyeongsangnam-do, KR;
Sung Wook Kwon, Seoul, KR;
Sungkyunwan University Foundation for Corporate Collaboration, Suwon-si, Gyeonggi-do, KR;
Abstract
Disclosed is a Doherty amplifier including a carrier amplifier to perform a signal amplification operation regardless of a level of an input signal, a peaking amplifier to perform an amplification operation, starting from a high power output where a level of an input signal is equal to or greater than a predetermined level, an output combination circuit to combine and output the outputs of the carrier amplifier and the peaking amplifier, and an input division circuit to divide an input signal into the carrier amplifier and the peaking amplifier, the Doherty amplifier including a carrier amplifier output harmonic impedance tuning network installed at a rear end of the carrier amplifier to tune an output harmonic impedance of the carrier amplifier, and a peaking amplifier output harmonic impedance tuning network installed at a rear end of the peaking amplifier to tune an output harmonic impedance of the peaking amplifier.