RF전력증폭기에 직렬다이오드선형화기를 이용한 전치보상기 구현

In this paper, a predistortion linearizer using series diode is proposed for linearizing the power amplifier in microwave radio systems. The power amplifier should be operated near saturation region to achieve high efficiency. But at this region, amplitude and phase distortions of the amplifier rema...

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Published in전기학회논문지 P Vol. 52P; no. 1; pp. 28 - 34
Main Authors 元容奎(Yong-Kyu Won), 尹萬?(Man-Soo Yun), 李相喆(Sang-Cheol Lee), 鄭讚壽(Chan-Soo Chung)
Format Journal Article
LanguageKorean
Published 대한전기학회 2003
Online AccessGet full text
ISSN1229-800X
2586-7792

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Abstract In this paper, a predistortion linearizer using series diode is proposed for linearizing the power amplifier in microwave radio systems. The power amplifier should be operated near saturation region to achieve high efficiency. But at this region, amplitude and phase distortions of the amplifier remarkably increase with the increase of input power and cause a significant adjacent channel interference. The linearizer is composed of a series diode with a parallel capacitor, which provides positive amplitude and negative phase deviations with the increasing input power. This type of linearizer using the nonlinearity of diode has improved the C/I(Carrier to Intermodulation Distortion) ratio well. By applying this linearizer to two-tone 880MHz power amplifier, adjacent channel leakage power is improved up to 5dBm.
AbstractList In this paper, a predistortion linearizer using series diode is proposed for linearizing the power amplifier in microwave radio systems. The power amplifier should be operated near saturation region to achieve high efficiency. But at this region, amplitude and phase distortions of the amplifier remarkably increase with the increase of input power and cause a significant adjacent channel interference. The linearizer is composed of a series diode with a parallel capacitor, which provides positive amplitude and negative phase deviations with the increasing input power. This type of linearizer using the nonlinearity of diode has improved the C/I(Carrier to Intermodulation Distortion) ratio well. By applying this linearizer to two-tone 880MHz power amplifier, adjacent channel leakage power is improved up to 5dBm.
Author 李相喆(Sang-Cheol Lee)
鄭讚壽(Chan-Soo Chung)
元容奎(Yong-Kyu Won)
尹萬?(Man-Soo Yun)
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Title RF전력증폭기에 직렬다이오드선형화기를 이용한 전치보상기 구현
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