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http://dx.doi.org/10.12673/jant.2020.24.2.107

Design of High Efficiency Switching Mode Class E Power Amplifier and Transmitter for 2.45 GHz ISM Band  

Go, Seok-Hyeon (Dept. of Electronics Engineering, Incheon National University)
Koo, Kyung-Heon (Dept. of Electronics Engineering, Incheon National University)
Publication Information
Journal of Advanced Navigation Technology / v.24, no.2, 2020 , pp. 107-114 More about this Journal
Abstract
A power amplifier of 2.4 GHz ISM band is designed to implement a transmitter system. High efficiency amplifiers can be implemented as class E or class F amplifiers. This study has designed a 20 W high efficiency class E amplifier that has simple circuit structure in order to utilize for the ISM band application. The impedance matching circuit was designed by class E design theory and circuit simulation. The designed amplifier has the output power of 44.2 dBm and the power added efficiency of 69% at 2.45 GHz. In order to apply 30 dBm input power to the designed power amplifier, voltage controlled oscillator (VCO) and driving amplifier have been fabricated for the input feeding circuit. The measurement of the power amplifier shows 43.2 dBm output and 65% power added efficiency. This study can be applied to the design of power amplifiers for various wireless communication systems such as wireless power transfer, radio jamming device and high power transmitter.
Keywords
Class E; High efficiency; Microwave; Power amplifier; Wireless communication;
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