Title:
広帯域無線周波数電力増幅器
Document Type and Number:
Japanese Patent JP6471804
Kind Code:
B2
Abstract:
A wideband self-envelope tracking power amplifier (PA) can use more than a 40-MHz channel bandwidth and improves the envelope bandwidth limit of a self-envelope tracking PAs by ten times. The PA uses an envelope load network, which is based on a general multi-stage low-pass filter. The envelope load network located between an RF choke inductor and main DC power supply provides a dynamically modulated PA supply voltage without using a dedicated envelope amplifier. An input terminal of the network connects a main PA via an RF choke inductor to an input of low-pass filter. An output terminal is connected to the low-pass filter via an envelope choke inductor and to a direct current (DC) power supply. A DC blocker is connected between the output of the low-pass filter and ground by a termination resistor.
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Inventors:
Marui
Chan, Seungwon
Theo, Kuhn Fu
Chan, Seungwon
Theo, Kuhn Fu
Application Number:
JP2017532238A
Publication Date:
February 20, 2019
Filing Date:
September 17, 2015
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H03F3/24; H03F1/02
Domestic Patent References:
| JP2008537467A | ||||
| JP2014502808A | ||||
| JP49021587B1 | ||||
| JP2005123949A | ||||
| JP2012004619A | ||||
| JP2007215248A | ||||
| JP2002208823A | ||||
| JP56071033U | ||||
| JP2008283678A |
Foreign References:
| US20070229168 |
Other References:
Alireza Kheirkhahi,RF Power Amplifier Efficiency Enhancement by Envelope Injection and Termination for Mobile Terminal Applications,IEEE Transactions on Microwave Theory and Techniques,2013年 1月 4日,Volume 61, Issue 2,pp. 878-889
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito
Mutsumi Sato
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito
Mutsumi Sato