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Linearization of multichannel amplifiers with the injection of second harmonics into the amplifier and predistortion circuit

Budimir, Djuradj and Males-Ilic, Natasa and Milovanovic, Bratislav and Tomic, Milan (2003) Linearization of multichannel amplifiers with the injection of second harmonics into the amplifier and predistortion circuit. In: 6th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service, 2003. TELSIKS 2003. IEEE, Los Alamitos, USA, pp. 214-217. ISBN 0780379632

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Official URL: http://dx.doi.org/10.1109/TELSKS.2003.1246216

Abstract

A linearization technique that uses the injection of the fundamental signal second harmonics together with the fundamental signals at the amplifier input has been extended in this paper by introducing the injection the second harmonics into nonlinear microwave amplifier and so-called predistortion circuit. Predistortion circuit produces the third-order intermodulation signals that are injected at the amplifier input together with the second harmonics making the linearization procedure more independent on the phase variation of the second harmonics. In addition, a considerably better improvement is attained for the power of fundamental signals close to 1-dB compression point by applying the linearization technique proposed in this paper in comparison to the linearization with the injection of the second harmonics merely in the nonlinear amplifier.

Item Type:Book Section
Uncontrolled Keywords:Harmonic generation, intermodulation distortion, linearisation techniques, microwave amplifiers, nonlinear network analysis, multichannel amplifier linearization, nonlinear microwave amplifier circuit, predistortion circuit, second harmonics injection, third-order intermodulation signal
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:3252
Deposited On:14 Feb 2007
Last Modified:11 Aug 2010 15:31

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