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Very High Linearity of High Power Amplifier by Reduction of $2^{nd}$, $3^{rd}$ Harmonics and Predistortion of $3^{rd}$ IMD  

Lee, Chong-Min (Information and Telecommunication Engineering, Soongsil University)
Seo, Chul-Hun (Information and Telecommunication Engineering, Soongsil University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.48, no.1, 2011 , pp. 50-54 More about this Journal
Abstract
In this article, the linearity of single power amplifier is improved by suppress $2^{nd}$ and $3^{rd}$ harmonics at output port of high power amplifier and by cancelling of $3^{rd}$ IMD. The matching network in order to suppress harmonics consists of metamaterial like the CRLH. The $2^{nd}$ and $3^{rd}$ harmonics are suppressed over 27 dBc, respectively. A phase of generated $3^{rd}$ IMD at output of DPA (drive power amplifier) has changed in order to offset the $3^{rd}$ IMD of HPA (high power amplifier). The harmonics of the proposed PAM suppress over 6 dB than single HPA. The PAM has a 36.98 dBm of the output power, 21.6 dB of the power gain and 29.4 % of the PAE. The harmonics is a -53 dBc about PAM. This result indicate that a harmonic level is lower 20 dB than reference power amplifier.
Keywords
Metamaterial; high linearity; pre-distortion; harmonics; PAM;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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