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http://dx.doi.org/10.12673/jant.2019.23.2.179

Narrow-Band Analog Pre-Distortion Linearization Technique using UHF 400 MHz Band 20 W Power Amplifier  

Ha, Jung-wan (R&D Center of Danam Systems INC)
Kim, Kang-san (R&D Center of Danam Systems INC)
Kim, Hyo-Jong (R&D Center of Danam Systems INC)
Publication Information
Journal of Advanced Navigation Technology / v.23, no.2, 2019 , pp. 179-185 More about this Journal
Abstract
In this paper, we have studied narrow-band analog pre-distortion linearization technique using UHF 400 MHz band 20 W power amplifier. The analog pre-distorter used the SC1894 radio frequency power amplifier linearizer(RFPAL) provided by MAXIM Corp and through the look-up table technique confirmed the intermodulation distortion(IMD) performance and the adjusted channel leakage ratio(ACLR) improvement for bandwidth below 1 MHz which does not operate on existing chips. In the 400 MHz (400 ~ 500 MHz) band, IMD performance and the ACLR improvement of up to 17.46 dB based on 1-channel offset and up to 16.6 dB based on 2-channel offset were confirmed. In the system requiring the same linearity, we confirmed power efficiency improvement of 12.41% at output power of over 40 W.
Keywords
Analog pre-distorter; Intermodulation distortion; Adjusted channel leakage ratio; Power amplifier;
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