Title:
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A wideband Doherty-like architecture using a Klopfenstein taper for load modulation
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Author:
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Bertran Albertí, Eduardo; Mehran, Yahyavi
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. CSC - Components and Systems for Communications Research Group |
Abstract:
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Abstract:
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A novel Doherty-like power amplifier (DPA) has been fabricated using 15 W, 2.7 GHz, GaN HEMT transistors. The quarter-wave transformer used in the classical DPA topology is replaced by a matching network including a Klopfenstein taper. From a practical prototype realization, this modification has demonstrated that the resulting DPA bandwidth (BW) is increased in comparison with the conventional topology while keeping the efficiency figures. Moreover, this design allows an
easy tuning of the group delay through the output reactance of the taper, resulting in a more straightforward adjustments than other recently-published designs where the quarter-wave transformer is replaced by multi-section transmission lines (hybrid or similar). Experimental results have shown an average efficiency of 47.2% for the HSPA+ modulation centered at 2.25GHz. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria electrònica -Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal -Power amplifiers -Gallium nitride -Doherty power amplifier (DPA) -Drain efficiency -Fractional bandwidth -Gallium nitride (GaN) -Klopfenstein taper -Amplificadors de potència -Nitrur de gal·li |
Rights:
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Document type:
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Article - Submitted version Article |
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