This paper presents the theoretical analysis of phase distortion (AM/PM) mechanisms in Gallium Nitride (GaN) Doherty power amplifiers (DPAs) and a novel approach to optimize the tradeoff between linearity and efficiency. In particular, it is demonstrated how it is possible to mitigate the AM/PM by designing a suitable mismatch at the input of the active devices, based on the identification of constant AM/PM and gain contour circles. The proposed theory is experimentally confirmed by source- and load-pull measurements and further validated through the design and realization of a 7 GHz 10 W DPA based on GaN monolithic technology.
Camarchia, V., Colantonio, P., Giannini, F., Giofre, R., Jiang, T., Pirola, M., et al. (2017). A design strategy for AM/PM compensation in GaN Doherty Power Amplifiers. IEEE ACCESS, 5, 22244-22251 [10.1109/ACCESS.2017.2759164].
A design strategy for AM/PM compensation in GaN Doherty Power Amplifiers
Colantonio P.;Giannini F.;Giofre R.;
2017-01-01
Abstract
This paper presents the theoretical analysis of phase distortion (AM/PM) mechanisms in Gallium Nitride (GaN) Doherty power amplifiers (DPAs) and a novel approach to optimize the tradeoff between linearity and efficiency. In particular, it is demonstrated how it is possible to mitigate the AM/PM by designing a suitable mismatch at the input of the active devices, based on the identification of constant AM/PM and gain contour circles. The proposed theory is experimentally confirmed by source- and load-pull measurements and further validated through the design and realization of a 7 GHz 10 W DPA based on GaN monolithic technology.| File | Dimensione | Formato | |
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A design strategy for AM:PM compensation in GaN Doherty Power Amplifiers.pdf
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