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An Analog Predistortion Linearizer for RF Amplifier

Hongbin Li

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Abstract

The development of communication technology has created a more demand of high-linearity RF amplifier .Usually power back off ,feedback, feedforward and predistortion are used to improve linearity of amplifier and predistortion is welcome for its many virtues . We have developed an anti-parallel diode-based predistorter and used complex gain control adjustor to linearize ATF34143 ,a amplifier manufactured by Agilent Technologies,Inc.The result of simulation experiments shows that the odd-order intermodulation distortions (IMDS) are cancelled to a great extent ,especially the third intermodulation (IM3) reaching 45dBc .

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What this paper is about

The development of communication technology has created a more demand of high-linearity RF amplifier .Usually power back off ,feedback, feedforward and predistortion are used to improve linearity of amplifier and predistortion is welcome for its many virtues . We have developed an anti-parallel diode-based predistorter and used complex gain control adjustor to linearize ATF34143 ,a amplifier manufactured by Agilent Technologies,Inc.The result of simulation experiments shows that the odd-order intermodulation distortions (IMDS) are cancelled to a great extent ,especially the third intermodulation (IM3) reaching 45dBc .

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Available abstract

The development of communication technology has created a more demand of high-linearity RF amplifier .Usually power back off ,feedback, feedforward and predistortion are used to improve linearity of amplifier and predistortion is welcome for its many virtues . We have developed an anti-parallel diode-based predistorter and used complex gain control adjustor to linearize ATF34143 ,a amplifier manufactured by Agilent Technologies,Inc.The result of simulation experiments shows that the odd-order intermodulation distortions (IMDS) are cancelled to a great extent ,especially the third intermodulation (IM3) reaching 45dBc .

Key concepts: Linearizer, Predistortion, Intermodulation, Amplifier, Linearity, Electronic engineering, Linear amplifier, RF power amplifier

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