论文信息 - A HIGH-EFFICIENCY POWER AMPLIFIER USING MULTILEVEL DIGITAL PULSE MODULATION

A HIGH-EFFICIENCY POWER AMPLIFIER USING MULTILEVEL DIGITAL PULSE MODULATION

This article introduces a new architecture for a high- efficiency linear transmitter using a pulse modulated envelope signal. The transmitter employs multilevel PWM to represent the baseband sig- nal. By using multilevel PWM, the efficiency of the power amplifier can be improved compared with that using the conventional PWM. To dem- onstrate the validity of the proposed architecture, a transmitter using three- level PWM is implemented and tested with the CDMA IS-95A signal. The measured PAE, including isolator and filter loss, is 37.6% at 21.6 dBm av- erage output power and the linearity requirements are satisfied. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1921-1924, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24494

Sungho Lee | Sangwook Nam | Jaejun Lee | Hyun-Jin Kim | Young-Sang Jeon

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