A 25 W 70% efficiency Doherty power amplifier at 6 dB output back-off for 2.4 GHz applications with VGS, PEAK control

This paper shows the design and simulation results of a hybrid Doherty power amplifier. The amplifier has been designed at 2,4 GHz, obtaining power-added efficiency above 70 % for 6 dB output power back-off, together with a small signal gain of 17 dB. Design and analysis equations are presented considering class AB bias conditions for the main amplifier and class C for the peak one in back-off larger than 6 dB, and FET device assumption. An additional control on the bias point of the peak device has been carried out, in order to increase the gain on the Doherty region and ease the design of the peak branch. A Cree’s GaN-HEMT CGH40010F device has been used with a nonlinear model guarantied up to 6 GHz and with an expected output power of 10 W. The obtained output power is higher than 25-W. The simulation has been carried out using Agilent ADS CAD tools. The present design could present the state of the art in terms of continuous-wave (CW) characterization.

• Autores: Moreno Rubio, Jorge; Angarita Malaver, Edison; Fernández González, Herman
• Tipo de recurso: Article of journal
• Fecha de publicación: 2015
• Institución: Corporación Universidad de la Costa
• Repositorio: REDICUC - Repositorio CUC
• Idioma: eng
• OAI Identifier: oai:repositorio.cuc.edu.co:11323/1697
• Acceso en línea: https://hdl.handle.net/11323/1697; https://doi.org/10.17981/ingecuc.11.1.2015.04; https://repositorio.cuc.edu.co/
• Palabra clave: Power Amplifier; High Efficiency; GaN Devices; Doherty; Microwave Circuits; Amplificador de potencia; Alta eficiencia; Dispositivos GaN; Circuitos de microondas
• Rights: openAccess
• License: http://purl.org/coar/access_right/c_abf2