Compensation method for a nonlinear amplifier using the gain expansion phenomenon in a Doherty amplifier

Jeong, Hyeong Tae; Chang, Ik Soo; Kim, Chul Dong

doi:10.1109/tmtt.2006.871917

Cited by 9 publications

(3 citation statements)

References 9 publications

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“…The spectra of the measured input and output signals, model output PH (13,4) and PH (9,2) and the crossvalidation errors when using PH (13,4), PH(13,0) and PH(9,2) models are shown in Fig. 4.…”

Section: Resultsmentioning

confidence: 99%

“…Spectra of the measured input and output signals, simulated signals using PH (13,4) and PH(9,2), the crossvalidation error when using PH (13,4), PH(13,0) and PH(9,2) models. The high order model PH (13,4) is close to the measured output signal. The in-band performance of all models are more or less the same, as seen from the model error.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…PH (13,(3)(4). Advantages of the WESPR over the ACEPR are its generality in stimuli signals and its ability to capture effects both in-and outof-band.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

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Comparison of evaluation criteria for power amplifier behavioral modeling

Landin

Isaksson²,

Händel

2008

2008 IEEE MTT-S International Microwave Symposium Digest

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In this paper different evaluation criteria for power amplifier behavioral modeling are studied and evaluated using measuremed data. The figure-of-merits are calculated from complex-envelope data of a sampled power amplifier intended for 3G. Both time-and frequency domain methods are included in the study. It is found that a model evaluation criterion should have ability to capture both the linear and nonlinear distortion as well as the memory effects in the power amplifier. The normalized mean square error (NMSE) and the weighted error-to-signal power ratio (WE-SPR) are found to be the strongest candidates for capturing the in-band and the out-of-band errors, respectively. Both are also independent of power amplifier technology and stimuli input.

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Section: Resultsmentioning

confidence: 99%

Section: Conclusion and Discussionmentioning

confidence: 99%

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Comparison of evaluation criteria for power amplifier behavioral modeling

Landin

Isaksson²,

Händel

2008

2008 IEEE MTT-S International Microwave Symposium Digest

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The Doherty Power Amplifier

Colantonio

Giannini

Giofrè

et al. 2014

Wiley Encyclopedia of Electrical and Electronics Engineering

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The Doherty power amplifier (DPA) is hereby presented and described starting from the basic idea up to more advanced and state‐of‐art results and guidelines. The DPA historical aspect is also covered, describing the timeline of its evolution. Moreover, the reasons related to why this architecture, roughly 80 years after its invention, is still on its wave to realizing very advanced power amplifier stages for wireless systems, are also highlighted. The limitations of the original topology are put into evidence together with the proposed solutions to overcome them. Another significant part of this contribution is focused on the integration of the DPA architecture with high‐efficiency power amplifier classes such as class F, Inverse F, and Inverse E. Some solutions to improve the output power back‐off of the DPA such as multiway, multistage, and multistep are also reported. Finally, the DPA frequency response limitation is put into evidence and several enhanced solutions to improve it are presented. The theoretical aspects are supported with experimental solutions, implemented as Monolithic Microwave Integrated Circuit (MMIC), Microwave Integrated Circuit or simply Hybrid Integrated Circuit (HIC), highlighting the different approaches and behavior.

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Asymmetrical Doherty power architecture with an integrated driver stage in the auxiliary branch

Piazzon

Colantonio

Giannini

et al. 2014

Int J RF and Microwave Comp Aid Eng

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This contribution presents the analysis, design and characterization of a high gain Doherty power amplifier implementing an integrated Driver stage in the Auxiliary branch. Guidelines and design equations are demonstrated, fulfilling the full integration of the whole new architecture. The development of a microwave monolithic integrated circuit prototype based on TriQuint GaN technology for 7 GHz applications is reported. 10.5 dB of Gain, 38.1 dBm of saturated output power and 42% of efficiency at 7 dB of output back-off have been demonstrated by experimental results. © 2014 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2014

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Compensation method for a nonlinear amplifier using the gain expansion phenomenon in a Doherty amplifier

Cited by 9 publications

References 9 publications

Comparison of evaluation criteria for power amplifier behavioral modeling

Comparison of evaluation criteria for power amplifier behavioral modeling

The Doherty Power Amplifier

Asymmetrical Doherty power architecture with an integrated driver stage in the auxiliary branch

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