| Autor: |
Chieh-Kai Yang, Youngseo Ko, Haedong Jang, Patrick Roblin, Hyo-Dal Park |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
78th ARFTG Microwave Measurement Conference. |
| DOI: |
10.1109/arftg78.2011.6183863 |
| Popis: |
A new load-modulation based power amplifier design scheme is proposed for average power added efficiency (PAE) enhancement. An algorithm for choosing the optimal operating conditions from load-pull data with swept input power is presented. The optimal conditions for the joint control of the inputs power and the tunable output matching network for dynamic load-modulation are extracted and demonstrated using a commercial 15W GaN HEMT transistor. Instead of the PAE peaking only at high output power, greater than 60% PAE over 10 dB output power range is predicted in simulation for class-AB operation. Pulsed-RF real time active load-pull measurements with 1.9μs pulse width and 1.2% duty rate are then performed for swept input power to approximate high peak-to-average power ratio operation. Additional pulsed-RF active load-pull measurements are further used at the selected optimal loads for verification. Greater than 60% PAE over 7 dB are observed using both measurement techniques. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
