Desgin and Implementation of Integrated Class EM Power Amplifier at 2.4 GHz

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Ershadi, Ali | 2016

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 48648 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Medi, Ali
Abstract:
This project proposes a novel design technique for implementation of class-EM power amplifier (PA). Class-EM mode of operation has been proposed as the improved version of class-E; outclasses in terms of efficiency as well as power gain. Specifically, provided that the current fall time of switch is an appreciable portion of a period; frequency of operation is high enough that the switching time of transistor can no longer be considered instantaneous in other words. A novel technique for harmonic injection required for class-EM operation is proposed. Followed by the system of equations and the design methodology governing the proposed circuit. As a proof of concept and verification of the proposed design method, a class-EM PA is designed and implemented in 0.25-µm GaAs pHEMT process. The fabricated class-EM PA operates at 2.4 GHz, delivers power of 30 dBm to the output load, with power-added efficiency of 60%, and power gain of 14 dB
Keywords:
Class E Power Amplifier ; Gallium Arsenaide ; Power Amplifier ; Monolitic Microwave Integrated Circuit (MMIC) ; Harmonic Injection ; Switching Mode Power Amplifiers ; Microwave Power Amplifiers ; Current Waveform ; Jump-Less Voltage

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