| Presentation | 2003/10/10 Joint Doherty Amplifier and Digital Modulators Optimizing Input Power Allocation to Each Branch for Mobile Highly Efficient Linear Power Amplifiers Fumitaka IIZUKA, Tsuyoshi OGINO, Hiroshi SUZUKI, Kazuhiko FUKAWA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a new structure of the Doherty amplifier by introducing digital signal processing which maintains high efficiency over the wide range of output power. The structure has two branches; one employs the class AB amplifier adjusted output power by drain DC bias as the carrier amplifier, and the other has two cascaded class B amplifiers as the peak amplifier. The controller using digital signal processing allocates the optimal input power for each branch to achieve both high linearity and high efficiency. Furthermore, installation of the power combiner that combines two amplifiers at 50Ω, improves the isolation between the branches, and it results in higher stability of circuit. The linearization by a model characterizing each PHEMT amplifier is introduced to each branches, and evaluates the output versus input characteristics by experiment and simulation. Simulation is carried out for the spectrum characteristics with OFDM modulated signal. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mobile communication / Doherty / High efficient amplifier / Linearization |
| Paper # | RCS2003-147 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2003/10/10(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Joint Doherty Amplifier and Digital Modulators Optimizing Input Power Allocation to Each Branch for Mobile Highly Efficient Linear Power Amplifiers |
| Sub Title (in English) | |
| Keyword(1) | Mobile communication |
| Keyword(2) | Doherty |
| Keyword(3) | High efficient amplifier |
| Keyword(4) | Linearization |
| 1st Author's Name | Fumitaka IIZUKA |
| 1st Author's Affiliation | Tokyo Institute of Technology:Taiyo Yuden() |
| 2nd Author's Name | Tsuyoshi OGINO |
| 2nd Author's Affiliation | Tokyo Institute of Technology |
| 3rd Author's Name | Hiroshi SUZUKI |
| 3rd Author's Affiliation | Taiyo Yuden |
| 4th Author's Name | Kazuhiko FUKAWA |
| 4th Author's Affiliation | Taiyo Yuden |
| Date | 2003/10/10 |
| Paper # | RCS2003-147 |
| Volume (vol) | vol.103 |
| Number (no) | 363 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |