Distortion correction of LDMOS power amplifiers using hybrid RF second harmonic injection/digital predistortion linearization

Part of book or chapter of book English OPEN
Koulouzis, Helias ; Budimir, Djuradj

An LDMOS RF power amplifier for RF multichannel wireless systems with improved IMD performance characteristics is presented. The application of two combined linearization methods is being tested with the help of circuit simulation software ADS. The injection of the fundamental signal's second harmonic in the RF amplifier, as well as a digital predistortion technique, is combined in order to achieve IMD improvement. By proper selection of phase and amplitude of the injected second harmonic signal, it is possible to reduce IMD products that have already been reduced by the well established method of digital predistortion.
  • References (7)

    [1] Yongcai Hu, Jean Claude Mollier and Juan Obregon, “A New Method of Third-Order Intermodulation Reduction in Nonlinear Microwave Systems”. IEEE Transactions on Microwave Theory and Techniques, Vol. MTT-34, No 2, Febuary 1986, pp 245 - 250.

    [2] C. S. Aitchison, M. Mbabele, M. R. Moazzam, D. Budimir, and F. Ali, 'Improvement of third order intermodulation products of RF and microwave amplifiers by injection', IEEE MTT Transactions on Microwave Theory and Techniques, pp. 1148-1154, Vol. MTT-49, No 6, June 2001.

    [3] D. Budimir, H. Koulouzis and K. Williams, "LDMOS RF Power Amplifiers with Improved IMD Performance”, 34th European Microwave Conference Proc., Amsterdam, The Netherlands, 11-15 October 2004.

    [4] H. Koulouzis and D. Budimir, "Design of High Efficiency LDMOS Power Amplifiers”, Postgraduate Research Conference in Electronics, Photonics, Communications & Networks, and Computing Science (PREP'04), 5-7, April, 2004, University of Hertfordshire, UK.

    [5] C. Fager, N.B. de Carvalho, J.C. Pedro and H. Zirath, “Intermodulation Distortion Behaviour in LDMOS Tranzistor Amplifiers”, IEEE MTT-S Digest, pp.131-134, 2002.

    [6] J. K. Cavers, “ Amplifier Linearization Using a Digital Predistortion with Fast Adaptation and Low Memory Requirements“ , IEEE Transactions on Vehicular Technology, Vol. 39, No. 4, pp. 374-382, November 1990.

    [7] A. S. Wright and W. G. Durtler, “Experimental Performance of an Adaptive Digital Linearized Power Amplifier “ , IEEE Transactions on Vehicular Technology, Vol. 41, No. 4, pp. 395-400, November 1992.

  • Metrics
    0
    views in OpenAIRE
    0
    views in local repository
    57
    downloads in local repository

    The information is available from the following content providers:

    From Number Of Views Number Of Downloads
    WestminsterResearch - IRUS-UK 0 57
Share - Bookmark