325W HVHBT Doherty Final and LDMOS Doherty Driver with 30dB Gain and 54% PAE Linearized to -55dBc for 2c11 6.5dB PAR

Preston Page,Oleh Krutko,Rached Hajji,Thomas Landon,Gary Burgin,Roger Branson,Joe Delaney,Craig Steinbeiser,Larry Witkowski

doi:10.1109/csics.2011.6062433

325W HVHBT Doherty Final and LDMOS Doherty Driver with 30dB Gain and 54% PAE Linearized to -55dBc for 2c11 6.5dB PAR

Preston Page, Oleh Krutko + Show 7 more

https://doi.org/10.1109/csics.2011.6062433

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Publication Date: Oct 1, 2011

Citations: 9

#High Voltage HBT #Wireless Basestation Applications + Show 8 more

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Abstract

A two stage high power amplifier consisting of a 325W High Voltage HBT (HVHBT) Doherty final and a 20W LDMOS Doherty driver has been developed for use in wireless basestation applications. The lineup achieved greater than 54% PAE at 75W (48.77dBm) average output power with 30dB gain while achieving -55dBc linearized ACPR at 5MHz offset using a 2C11 WCDMA input signal with 6.5dB PAR signal. The DPD friendly characteristics of the HVHBT Doherty final enable use of a non-linear Doherty driver while maintaining the same ease of correction for the overall lineup.

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