Adaptively preserving power amplifier linearity under antenna mismatch

Adrianus van Bezooijen, Reza Mahmoudi, Arthur H.M. van Roermund

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

19 Citaten (Scopus)

Samenvatting

An adaptive method is proposed to preserve power amplifier linearity under severe antenna mismatch condition, as an alternative to an isolator. At high output power and mismatch conditions voltage clipping, due to collector voltage saturation of the bipolar power transistor, is demonstrated to be the main cause of distortion. Linearity degradation can be properly monitored by minimum voltage detection, which is used adaptively to control the gain of a pre-amplifier in order to prevent collector voltage clipping. Measurement results demonstrate a significant linearity improvement under severe mismatch conditions. For an EDGE power amplifier an EVM improvement of 5% and an ACPR improvement of 10dB have been obtained at 28.5 dBm output power and a VSWR of 4:1.
Originele taal-2Engels
TitelIEEE MTT-S Int. Microwave Symposium Digest
Plaats van productiePiscataway
UitgeverijInstitute of Electrical and Electronics Engineers
Pagina's1515-1518
Aantal pagina's4
ISBN van geprinte versie0-7803-8331-1
DOI's
StatusGepubliceerd - 2004
Evenement2004 IEEE Radio Frequency Integrated Circuits Symposium (RFIC 2004) - Forth Worth, Verenigde Staten van Amerika
Duur: 6 jun 20048 jun 2004

Congres

Congres2004 IEEE Radio Frequency Integrated Circuits Symposium (RFIC 2004)
Verkorte titelRFIC 2004
LandVerenigde Staten van Amerika
StadForth Worth
Periode6/06/048/06/04
AnderIEEE RFIC/MTT Symposium 2004, Forth-Worth USA

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  • Citeer dit

    van Bezooijen, A., Mahmoudi, R., & van Roermund, A. H. M. (2004). Adaptively preserving power amplifier linearity under antenna mismatch. In IEEE MTT-S Int. Microwave Symposium Digest (blz. 1515-1518). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/MWSYM.2004.1338865