A novel design methodology for two stages microwave monolithic integrated circuit (MMIC) power amplifier (PA) is presented. The proposed solution allows to almost null the phase distortions (AM/PM) without worsening other key features of the PA, such as amplitude distortion (AM/AM) and efficiency. The derived approach is verified presenting the design and the experimental characterization of a two stages GaN MMIC PA for Microwave Backhaul radio links. The MMIC has been developed in a commercial $0.25~murm m$ GaN power process, resulting in a $3times 3~rm mm^2$ chip area. At 7 GHz, the realized module shows 6 W of saturated output power, 17 dB of gain, 63% of power added efficiency and less than 1.5 degree of phase distortion. Moreover, when tested with modulated signals (i.e., 256 QAM modulation scheme, 7 dB of PAPR), the PA shows a spectral regrow lower than $-40~rm dBc$ at 32 dBm of average output power without any predistortion, while the average efficiency is around 30%.

Giofre', R., Colantonio, P., & Giannini, F. (2016). A Design Approach for Two Stages GaN MMIC PAs With High Efficiency and Excellent Linearity. IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 26(1), 46-48 [10.1109/LMWC.2015.2505634].

A Design Approach for Two Stages GaN MMIC PAs With High Efficiency and Excellent Linearity

GIOFRE', ROCCO;COLANTONIO, PAOLO;GIANNINI, FRANCO
2016-01-06

Abstract

A novel design methodology for two stages microwave monolithic integrated circuit (MMIC) power amplifier (PA) is presented. The proposed solution allows to almost null the phase distortions (AM/PM) without worsening other key features of the PA, such as amplitude distortion (AM/AM) and efficiency. The derived approach is verified presenting the design and the experimental characterization of a two stages GaN MMIC PA for Microwave Backhaul radio links. The MMIC has been developed in a commercial $0.25~murm m$ GaN power process, resulting in a $3times 3~rm mm^2$ chip area. At 7 GHz, the realized module shows 6 W of saturated output power, 17 dB of gain, 63% of power added efficiency and less than 1.5 degree of phase distortion. Moreover, when tested with modulated signals (i.e., 256 QAM modulation scheme, 7 dB of PAPR), the PA shows a spectral regrow lower than $-40~rm dBc$ at 32 dBm of average output power without any predistortion, while the average efficiency is around 30%.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-INF/01 - Elettronica
English
Distortion;Gallium nitride;Linearity;Logic gates;MMICs;Power generation;Radio frequency;AM/AM;AM/PM;GaN PA;high efficiency;linearity
Giofre', R., Colantonio, P., & Giannini, F. (2016). A Design Approach for Two Stages GaN MMIC PAs With High Efficiency and Excellent Linearity. IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 26(1), 46-48 [10.1109/LMWC.2015.2505634].
Giofre', R; Colantonio, P; Giannini, F
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/133900
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