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A novel wideband and reconfigurable high average efficiency power amplifier

David Gustafsson (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Christer Andersson (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Christian Fager (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik)
2012 IEEE MTT-S International Microwave Symposium, IMS 2012, Montreal, 17-22 June 2012 (0149-645X). (2012)
[Konferensbidrag, refereegranskat]

This work presents theory and measurements of a new power amplifier based on the Doherty topology. It is theoretically shown that, by using a new set of design parameters with a Doherty power amplifier topology, the proposed amplifier can provide high efficiency, both at full output power and at power back-off, over a much improved bandwidth compared to the conventional Doherty power amplifier configuration. It is also shown that the proposed amplifier allows for simple reconfiguration of the efficiency in power back-off. A demonstrator circuit using individually controlled main and peak amplifier input signals is designed to validate the theoretical findings. Measurements show state-of-the art efficiency bandwidth at both full output power and at power back-off, as well as reconfigurable efficiency, thus validating the theory and demonstrating the potential of the proposed PA for use in future wireless transmitter applications.

Nyckelord: Amplifiers, Broadband amplifiers, Doherty, Gallium nitride, GaN, High efficiency, Power amplifiers

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Denna post skapades 2012-10-12. Senast ändrad 2015-12-17.
CPL Pubid: 164671


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