Design of Highly Efficient Load Modulation Transmitter for Wideband Cellular Applications
| Autor: | B. Almgren, Hossein Mashad Nemati, Christian Fager, Thomas Eriksson, Haiying Cao |
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| Rok vydání: | 2010 |
| Předmět: |
Engineering
Power-added efficiency Radiation business.industry Amplifier Transmitter Bandwidth (signal processing) Electrical engineering Condensed Matter Physics Channel capacity Hardware_INTEGRATEDCIRCUITS Electronic engineering Adjacent channel Electrical and Electronic Engineering Wideband business Varicap |
| Zdroj: | IEEE Transactions on Microwave Theory and Techniques. 58:2820-2828 |
| ISSN: | 0018-9480 |
| DOI: | 10.1109/tmtt.2010.2077914 |
| Popis: | In this paper, the high potential of varactor-based dynamic load modulation (DLM) techniques for wideband cellular applications is demonstrated. A systematic design procedure is proposed to ensure high-efficiency wideband performance. It incorporates harmonically tuned power amplifier (PA) concepts and tunable matching techniques in an integrated design. A DLM transmitter at 2.65 GHz with a peak output power of 6 W is designed using the proposed procedure. In order to investigate the wideband performance of the implemented demonstrator, WCDMA signals with scaled bandwidths are employed. The signal peak-to-average ratio is 7 dB and the same for all the experiments. For the 38.4-MHz signal, which has a corresponding channel bandwidth of > 40 MHz, an average power added-efficiency (PAE) of 44%, normalized mean square error (NMSE) of -35 dB, and adjacent channel leakage ratio (ACLR) of -43 dBc are measured. |
| Databáze: | OpenAIRE |
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