Archivio Istituzionale della RicercaThis work presents the design and characterization of a hybrid Doherty power amplifier for S band aiming at enhancing linearity near saturation while maintaining high efficiency. The design combines two highly linear branch amplifiers in a Doherty configuration through a quadrature coupler with reactive termination at the isolated port. At 2.7GHz, the amplifier demonstrates 13.9dB small signal gain, 41dBm saturated power, and 67% maximum efficiency. The linearity is evaluated through two-tone and modulated signal characterizations, showing -30dBc IMD3 up to 36dBm of output power. Additionally, the ACPR is -30dBc and -39dBc, respectively, before and after digital predistortion.
Highly Efficient and Linearity-Enhanced S-band Doherty Power Amplifier / Bartolotti, Giulia; Zhang, Zhifan; Piacibello, Anna; Camarchia, Vittorio. - ELETTRONICO. - (2025), pp. 1-4. (Intervento presentato al convegno 2025 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC) tenutosi a Torino (Ita) nel 10-11 April 2025) [10.1109/inmmic64198.2025.10975576].
Highly Efficient and Linearity-Enhanced S-band Doherty Power Amplifier
Bartolotti, Giulia;Zhang, Zhifan;Piacibello, Anna;Camarchia, Vittorio
2025
Abstract
This work presents the design and characterization of a hybrid Doherty power amplifier for S band aiming at enhancing linearity near saturation while maintaining high efficiency. The design combines two highly linear branch amplifiers in a Doherty configuration through a quadrature coupler with reactive termination at the isolated port. At 2.7GHz, the amplifier demonstrates 13.9dB small signal gain, 41dBm saturated power, and 67% maximum efficiency. The linearity is evaluated through two-tone and modulated signal characterizations, showing -30dBc IMD3 up to 36dBm of output power. Additionally, the ACPR is -30dBc and -39dBc, respectively, before and after digital predistortion.
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Highly_Efficient_and_Linearity-Enhanced_S-band_Doherty_Power_Amplifier.pdf
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https://hdl.handle.net/11583/2999660