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Ali, M. Tanseer; Wu, Ruiheng; Mao, Luhong; Callaghan, Peter; Rapajic, Predrag (2014)
Publisher: Institution of Engineering and Technology (IET)
Languages: English
Types: Article
Subjects: TK
In this paper, a novel amplifier linearisation technique based on the negative impedance compensation is presented. As demonstrated by using Volterra model, the proposed technique is suitable for linearising amplifiers with low open-loop gain, which is appropriate for RF/microwave applications. A single-chip CMOS amplifier has been designed using the proposed method, and the simulation results show that high gain accuracy (improved by 38%) and high linearity (IMD3 improved by 14 dB, OIP3 improved by 11 dB and adjacent channel power ratio (ACPR) improved by 44% for CDMA signal) can be achieved.
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    • [1] Presti, C.D., Kimball, D.F., and Asbeck, P.M.: 'Closed-loop digital predistortion system with fast real-time adaptation applied to a handset WCDMA PA module', IEEE Transactions on Microwave Theory and Techniques, 2012, 60, (3), pp. 604-618
    • [2] Shi, B., Yao, J., and Chia, M.Y.W.: 'Linearization of Ka-band high power amplifiers', Proc. IEEE International Symposium on Radio-Frequency Integration Technology, Singapore, November 2012, pp. 180-182
    • [3] Chen, W., Bassam, S.A., Xiang, L., Liu, Y., Rawat, K., Helaoui, M., Ghannouchi, F.M., and Fen, Z.: 'Design and linearization of concurrent dual-band Doherty power amplifier with frequency-dependent power ranges', IEEE Transactions on Microwave Theory and Techniques, 2011, 59, (10), pp. 2537-2546
    • [4] Seo, M., Kim, K., Kim, M., Kim, H., Jeon, J., Park, M., Lim, H., and Yang, Y.: 'Ultrabroaband linear power amplifier using a frequency-selective analog predistorter', IEEE Transactions on Circuits and Systems-II: Express Briefs, 2011, 58, (5), pp. 264-268
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