2013•Microwave and Optical Technology LettersRequires access

High Efficiency Two‐Stage Unbalanced Doherty Power Amplifier for Lte Applications

Dong‐Hee Jang, Ji‐Yeon Kim, Ji‐Yeon Kim, Jong‐Heon Kim, Jong‐Heon Kim

Abstract

ABSTRACT A 16 W two‐stage unbalanced Doherty amplifier with high efficiency is proposed for the long‐term evolution test signal. The proposed amplifier by using the gate bias control of the drive and final peaking amplifier demonstrated a 43% power added efficiency with an adjacent channel leakage ratio of −37 dBc at 7.3 dB output power back‐off. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2176–2179, 2013

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Key concepts: Amplifier, Power-added efficiency, dBc, Adjacent channel, Direct-coupled amplifier, Linear amplifier, Doherty amplifier, RF power amplifier