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Class iCGF–1 Mode Power Amplifier for Enhancing the Linearity of the Traditional Continuous Class F–1 Mode.

Authors :
Li, Feifei
Yu, Cuiping
Liu, Yuanan
Source :
International Journal of Circuit Theory & Applications. Oct2024, p1. 12p. 16 Illustrations.
Publication Year :
2024

Abstract

ABSTRACT In this paper, the iCGF−1 mode is proposed to compensate the amplitude‐to‐amplitude modulation (AM/AM) distortion of the traditional continuous class F−1 mode while maintaining the high efficiency. The AM/AM profile of the iCGF−1 mode is mathematically expressed simultaneously as a function of the input nonlinearity parameter γ$$ \gamma $$ and conduction angle α$$ \alpha $$, which makes the iCGF−1 mode more flexible in controlling the AM/AM profile. The first inflection point of the AM/AM profile can be moved to a higher output power level through theoretical deduction by adjusting the second harmonic source impedance Z2S$$ {Z}_{2S} $$ and gate bias voltage to increase the values of γ$$ \gamma $$ and α$$ \alpha $$. This flattens the AM/AM profile while the efficiency profile remains almost the same as that of the traditional continuous class F−1 mode. The performance of the iCGF−1 mode is verified through simulation and experimental measurements. The iCGF−1 PA is fabricated with CGH40010F and has a frequency range of 2–2.6 GHz. The drain efficiency is 70.1%–77.9%, and the output power is 41.1–41.7 dBm. The linearity is tested with a 100 MHz 5G NR signal (the peak average power ratio (PAPR) is 8.5 dB) at 2.3 GHz. The worst adjacent channel power ratio (ACPR) is −32.3 dBc without digital predistortion (DPD) and −52.1 dBc with DPD. The results show that the iCGF−1 mode has successfully compensated the AM/AM distortion of the traditional continuous class F−1$$ {}^{-1} $$ mode and maintaining high efficiency. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00989886
Database :
Academic Search Index
Journal :
International Journal of Circuit Theory & Applications
Publication Type :
Academic Journal
Accession number :
179994237
Full Text :
https://doi.org/10.1002/cta.4290