Abstract
From the instantaneous efficiency plot, it is observed that the conventional 2-stage Doherty power amplifier (DPA) with high upper power dynamic range (>12 dB) suffers from a substantial dip in the middle of the upper power regime, thus reducing the average efficiency. In this study, an envelope-tracking-based DPA is proposed in order to minimise this dip by adjusting the drain bias voltage of the auxiliary amplifier of the DPA proportional to the input power level.
| Original language | English |
|---|---|
| Pages (from-to) | 525-530 |
| Number of pages | 6 |
| Journal | International Journal of Electronics |
| Volume | 97 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 Jan 2010 |
Keywords
- RF and microwave electronics
- efficiency enhancement
- envelope tracking
- probability density function
- Doherty power amplifier