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. 30, 2010
Filed:
Apr. 23, 2008
Wan Jong Kim, Coquitlam, CA;
Kyoung Joon Cho, Coquitlam, CA;
Shawn Patrick Stapleton, Burnaby, CA;
Jong Heon Kim, Yongsan-Gu, KR;
Wan Jong Kim, Coquitlam, CA;
Kyoung Joon Cho, Coquitlam, CA;
Shawn Patrick Stapleton, Burnaby, CA;
Jong Heon Kim, Yongsan-Gu, KR;
Dali Systems Co. Ltd., George Town, Grand Cayman, KY;
Abstract
A power amplifier using N-way Doherty structure for extending the efficiency region over the high peak-to-average power ratio of the multiplexing modulated signals such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. In an embodiment, the present invention uses a dual-feed distributed structure to an N-way Doherty amplifier to improve the isolation between at least one main amplifier and at least one peaking amplifier and, and also to improve both gain and efficiency performance at high output back-off power. Hybrid couplers can be used at either or both of the input and output. In at least some implementations, circuit space is also conserved due to the integration of amplification, power splitting and combining.