Broadband Doherty Power Amplifier via Real Frequency Technique

A comprehensive method of designing a broadband Doherty power amplifier is presented in this paper. The essential limitations of bandwidth extension of a Doherty power amplifier are discussed based on the proposed structure of the Doherty power amplifier, which also takes the output matching network...

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Veröffentlicht in:	IEEE transactions on microwave theory and techniques 2012-01, Vol.60 (1), p.99-111
Hauptverfasser:	Guolin Sun, Jansen, Rolf H.
Format:	Artikel
Sprache:	eng
Schlagworte:	Amplifiers Applied sciences Broadband Broadband amplifiers Circuit properties Circuits Doherty power amplifier Electric, optical and optoelectronic circuits Electronic circuits Electronic equipment and fabrication. Passive components, printed wiring boards, connectics Electronics Exact sciences and technology Frequency modulation Gallium nitrides Impedance Inverters Matching Microwaves Networks Optimization Power amplifiers real frequency technique systematic design procedure Transistors
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Beschreibung
Zusammenfassung:	A comprehensive method of designing a broadband Doherty power amplifier is presented in this paper. The essential limitations of bandwidth extension of a Doherty power amplifier are discussed based on the proposed structure of the Doherty power amplifier, which also takes the output matching networks of both sub-amplifiers into account. The broadband matching is realized by applying the simplified real frequency technique with the desired frequency-dependent optimum impedances. GaN transistors were selected to implement the circuit structure.
ISSN:	0018-9480 1557-9670
DOI:	10.1109/TMTT.2011.2175237