Title:
WIDEBAND RADIO FREQUENCY POWER AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2016/042773
Kind Code:
A1
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.
Inventors:
MA RUI (US)
CHUNG SUNGWON (US)
TEO KOON HOO (US)
CHUNG SUNGWON (US)
TEO KOON HOO (US)
Application Number:
PCT/JP2015/004768
Publication Date:
March 24, 2016
Filing Date:
September 17, 2015
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03F1/02; H03F3/189
Domestic Patent References:
| WO2009147379A1 | 2009-12-10 |
Foreign References:
| US4717884A | 1988-01-05 | |||
| US6349216B1 | 2002-02-19 | |||
| US20040000951A1 | 2004-01-01 | |||
| US7215221B1 | 2007-05-08 | |||
| EP1356584A2 | 2003-10-29 |
Other References:
ALIREZA KHEIRKHAHI ET AL: "Enhanced Class-A/AB mobile terminal power amplifier efficiency by input envelope injection and self envelope tracking", MICROWAVE SYMPOSIUM DIGEST (MTT), 2011 IEEE MTT-S INTERNATIONAL, IEEE, 5 June 2011 (2011-06-05), pages 1 - 4, XP032006848, ISBN: 978-1-61284-754-2, DOI: 10.1109/MWSYM.2011.5972901
ALIREZA KHEIRKHAHI ET AL: "RF Power Amplifier Efficiency Enhancement by Envelope Injection and Termination for Mobile Terminal Applications", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 61, no. 2, 1 February 2013 (2013-02-01), pages 878 - 889, XP011492610, ISSN: 0018-9480, DOI: 10.1109/TMTT.2012.2234475
ALIREZA KHEIRKHAHI ET AL: "RF Power Amplifier Efficiency Enhancement by Envelope Injection and Termination for Mobile Terminal Applications", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 61, no. 2, 1 February 2013 (2013-02-01), pages 878 - 889, XP011492610, ISSN: 0018-9480, DOI: 10.1109/TMTT.2012.2234475
Attorney, Agent or Firm:
SOGA, Michiharu et al. (8th Floor Kokusai Building, 1-1, Marunouchi 3-chome, Chiyoda-k, Tokyo 05, JP)
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