Kim, Sung Yong ; Jang, Mi Ae ; Jeon, Ki Kyung ; Kim, Young ; Jeong, Yong Chae
(2005)
An analog linearizer using second harmonic signals feedforwarding.
In: Gallium Arsenide applications symposium. GAAS 2005, 3-7 ottobre 2005, Parigi.
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Abstract
In this paper, an analog linearizer using second harmonic signals feedforwarding is proposed. The harmonic generator of the proposed linearizer that consists of a small signal amplifier extracts second harmonic signals. A vector modulator, modulate fundamental signal with second harmonic signals, makes the inverse third order intermodulation distortion (IMD3) signals of power amplifier and controls amplitude/phase of them with modulation factors. As a result, this linearizer is suppressed IMD3 signals of power amplifier effectively. The test results show that IMD3 signals of power amplifier are suppressed more than 20dB for CW two-tone signals. Also, it’s improved the adjacent channel power ratio (ACPR) more than 7dB for CDMA (IS-95) signals.
Abstract
In this paper, an analog linearizer using second harmonic signals feedforwarding is proposed. The harmonic generator of the proposed linearizer that consists of a small signal amplifier extracts second harmonic signals. A vector modulator, modulate fundamental signal with second harmonic signals, makes the inverse third order intermodulation distortion (IMD3) signals of power amplifier and controls amplitude/phase of them with modulation factors. As a result, this linearizer is suppressed IMD3 signals of power amplifier effectively. The test results show that IMD3 signals of power amplifier are suppressed more than 20dB for CW two-tone signals. Also, it’s improved the adjacent channel power ratio (ACPR) more than 7dB for CDMA (IS-95) signals.
Document type
Conference or Workshop Item
(Paper)
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DOI
Deposit date
15 Feb 2006
Last modified
17 Feb 2016 14:18
URI
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Document type
Conference or Workshop Item
(Paper)
Creators
Subjects
DOI
Deposit date
15 Feb 2006
Last modified
17 Feb 2016 14:18
URI
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