High Efficiency Transmitter Using Varactor Based Dynamic Load Modulation
- Fager, Christian
- Cao, Haiying
- Eriksson, Thomas
- Jos, Hendrikus
- Mashad Nemati, Hossein
- Soltani Tehrani, Ali
- Zirath, Herbert
Publication date
January 2010
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE)Abstract
This paper presents results for a dynamic loadmodulation transmitter where an existing 1 GHz LDMOSpower amplifier is combined with a varactor based tuneableload network to produce a dramatic efficiency improvementfor modulated signals. The transmitter is combinedwith a dedicated linearization method to achieve anaverage PAE of 53% for a WCDMA signal at 7 dB PAPR.The results demonstrate the potential of dynamic loadmodulation for future transmitters combining flexibilityand high efficiency at a low cost
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