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A Study on Linearity and Efficiency Enhancement of Power Amplifier

Jeon Joong-Sung

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Abstract

In this paper, we have compared and analyzed the performance of high amplifier using Doherty technique to improve linearity and efficiency of base station and repeater Power amplifier for WCDMA. This Doherty amplifier implements with 3dB branch line coupler and 90 transmission line The phase offset line is designed to maintain the high linearity and efficiency at the low efficiency Period of the power amplifier CW 1-tone experimental results at the WCDMA frequency shows that Doherty amplifier which achieves power add efficiency(PAE) of at 6dB back off the point from maximum output power 52.3 dBm, obtains higher efficiency of than class AB Finding optimum bias Point after adjusted gate voltage, Doherty amplifier shows that improves 4dB

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What this paper is about

In this paper, we have compared and analyzed the performance of high amplifier using Doherty technique to improve linearity and efficiency of base station and repeater Power amplifier for WCDMA. This Doherty amplifier implements with 3dB branch line coupler and 90 transmission line The phase offset line is designed to maintain the high linearity and efficiency at the low efficiency Period of the power amplifier CW 1-tone experimental results at the WCDMA frequency shows that Doherty amplifier which achieves power add efficiency(PAE) of at 6dB back off the point from maximum output power 52.3 dBm, obtains higher efficiency of than class AB Finding optimum bias Point after adjusted gate voltage, Doherty amplifier shows that improves 4dB

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Available abstract

In this paper, we have compared and analyzed the performance of high amplifier using Doherty technique to improve linearity and efficiency of base station and repeater Power amplifier for WCDMA. This Doherty amplifier implements with 3dB branch line coupler and 90 transmission line The phase offset line is designed to maintain the high linearity and efficiency at the low efficiency Period of the power amplifier CW 1-tone experimental results at the WCDMA frequency shows that Doherty amplifier which achieves power add efficiency(PAE) of at 6dB back off the point from maximum output power 52.3 dBm, obtains higher efficiency of than class AB Finding optimum bias Point after adjusted gate voltage, Doherty amplifier shows that improves 4dB

Key concepts: Doherty amplifier, Power-added efficiency, Amplifier, Linear amplifier, Direct-coupled amplifier, RF power amplifier, Electrical engineering, Linearity

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