The Continuum of Load Modulation Ratio From Doherty to Traveling-Wave Amplifiers
| Autor: | Rui Hou, Richard Hellberg, Bo Berglund, Paul Saad |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Radiation Amplifier Transistor Bandwidth (signal processing) dBm 020206 networking & telecommunications 02 engineering and technology Condensed Matter Physics law.invention law 0202 electrical engineering electronic engineering information engineering Electronic engineering Traveling wave Electrical and Electronic Engineering Unified field theory Drain efficiency Electrical impedance |
| Zdroj: | IEEE Transactions on Microwave Theory and Techniques. 67:5101-5113 |
| ISSN: | 1557-9670 0018-9480 |
| DOI: | 10.1109/tmtt.2019.2938167 |
| Popis: | This article proposes a unified theory on power combining with a continuum of load modulation (LM) ratios. Two well-known power amplifier (PA) techniques, Doherty and traveling-wave amplifiers, are the two extreme examples within this continuum, yielding full and zero LMs, respectively. Based on this theory, a power-combining technique is proposed, which optimizes efficiency and bandwidth at a certain power backoff (BO) level, which is often in between the two well-known architectures. As a demonstration, a PA with an LM ratio of 1.4 is designed. It achieves a peak output power of 49.3±0.5 dBm and 47%–60% drain efficiency at 8-dB power BO over 2.6–3.8 GHz. The linearizability and practical usefulness of this PA are demonstrated through linearized-modulated measurements. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|