Power back-off behaviour of high-efficiency power-combining Class-E amplifier


Autoria(s): Thian, M.; Fusco, V.
Data(s)

01/03/2011

Resumo

Power back-off performances of the modified power-combining Class-E amplifier under different amplitudemodulation schemes such as envelope elimination and restoration (EER) and envelope tracking (ET) are experimentally assessed in this paper. The modified output load network adopting three-harmonic terminations technique eliminates the need for additional lossy filtering section in the transmitter chain. Small dc-feed inductances rather than massive RF chokes as in the classic Class-E amplifier are used so as to increase the modulation bandwidth and therefore improve the linearity of the EER transmitter. High efficiency over a wide dynamic range using amplitude modulation through drain-voltage control (EER) was achieved and this agrees well with the Class-E theoretical prediction. When the PA was used within the ET scheme, an increase of average drain efficiency of as high as 40% with respect to the CW excitation was obtained for a multi-carrier input signal with 12dB peak-to-average power ratio. © 2011 Institut fur Mikrowellen.

Identificador

http://pure.qub.ac.uk/portal/en/publications/power-backoff-behaviour-of-highefficiency-powercombining-classe-amplifier(759bab18-349f-4e5f-917c-6bb7314d7fe1).html

http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-79957441329&md5=13d815c44e49fdef1004c1c4f16fa02a

Idioma(s)

eng

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Thian , M & Fusco , V 2011 , ' Power back-off behaviour of high-efficiency power-combining Class-E amplifier ' Paper presented at GEMIC , Darmstadt , Germany , 01/03/2011 - 01/03/2011 , pp. 1-4 .

Tipo

conferenceObject