An extended Doherty amplifier with high efficiency over a wide power range

By M. Iwamoto, A.E. Williams, Pin-Fan Chen, A. Metzger, Chengzhou Wang, L. Larson, Peter M. Asbeck. 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157), 2001

322 citations recorded by the source corpus.

Subfields: Condensed Matter Physics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/32d31bdc147ee2ade8166b715bd381227c523f0a

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In Condensed Matter Physics

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Citations in the corpus

Design and Linearization of Concurrent Dual-Band Doherty Power Amplifier With Frequency-Dependent Power Ranges (2011, background): “According to this characterization, a frequency-selective two-cell processing predistortion architecture that can simultaneously compensate for the distortion in each band for the linearization of a concurrent dual-band PA is demonstrated.”
A robust modeling and design approach for dynamically loaded and digitally linearized Doherty amplifiers (2005, methodology): “…current , and 3) AM/AM and AM/PM distortion were collected for given sets of load and source impedances, quiescent biasing point , and input power as illustrated in the following equation: (1) The transistor under test was mounted into a test fixture and biased from class AB ( V) to class C ( V).”
Symmetrical Doherty Power Amplifier With Extended Efficiency Range (2016, background): “Further, for the asymmetrical Doherty, the ratio of auxiliary and main transistor device peripheries, , scales with the parameter [4]”
Design of a Concurrent Dual-Band 1.8–2.4-GHz GaN-HEMT Doherty Power Amplifier (2012, background): “Modulated signals in modern wireless communication systems have large amplitude variations, which results in high peak-to-average ratios (PARs), sometimes exceeding 10 dB.”
Extension of High-Efficiency Range of Doherty Amplifier by Using Complex Combining Load (2014, background): “The asymmetrical DPA [10]–[14] relies on either an enlarged periphery auxiliary device or an under-utilized main device (equal cell scenario).”
Power amplifiers and transmitters for RF and microwave (2002, background): “Doherty transmitters with unequal power division can be implemented by using different PEP load impedances and different supply voltages in the two PAs [30].”
Design of wide-bandwidth envelope-tracking power amplifiers for OFDM applications (2005, background): “This problem has been thoroughly investigated over many years and envelope elimination and restoration (EER) [8]‐[10], predistortion [3], [4], feedback [3], [4], feed-forward [4], Doherty [ 11 ], envelope tracking (ET) [12]‐[15], linear amplification with nonlinear control (LINC) [16], and gate dyna”
A high-efficiency linear RF power amplifier with a power-tracking dynamically adaptive buck-boost supply (2004, background): “Techniques such as Doherty amplifier [1], [3], [4] and linear amplification with nonlinear control (LINC) [1], [3] have been reported for the purpose of improving PA efficiency.”
Baseband Equivalent Volterra Series for Digital Predistortion of Dual-Band Power Amplifiers (2014, background): “Advanced PA design techniques, such as load (Doherty [1]–[4]) and drain-supply (envelope tracking [5]–[7]) modulations, have been applied to improve efficiency at the back-off region of single-band PAs.”
A Modified Doherty Configuration for Broadband Amplification Using Symmetrical Devices (2012, background): “Many variants of the Doherty amplifier were proposed, such as those targeting improved efficiency at an extended back-off power of 8–12 dB [2]–[5].”