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Koulouzis, Helias; Budimir, Djuradj
Publisher: IEEE
Languages: English
Types: Part of book or chapter of book
Subjects: UOW3
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.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

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    • [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.
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