Facta Univ. Ser.: Elec. Energ., vol. 26, No. 1, April 2013, pp. 1-10
DOI: 10.2298/FUEE1301001S

INFLUENCE OF THE RECONSTRUCTION FILTER ON THE PERFORMANCE OF A SWITCHED-MODE POWER AMPLIFIER

Elena Serebryakova, Kurt Blau, Matthias A. Hein

Abstract: This paper presents an analysis of a reconstruction filter in a switched mode power amplifier system. Doubly and singly terminated filters for current-mode class-S power amplifiers were analysed previously through analytical, numerical, and experimental approaches, and it was shown that only singly terminated filters can fulfil the requirements of current-mode switching amplifiers, owing to their constant input resistance over the pass-band. In this paper potential effects of the parasitic components in the actual filters and the filter termination are evaluated. The simulation and measurement results of current mode class-S power amplifier systems employing GaN HEMT MMICs are presented and critically analysed.

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