| Presentation | 2015-01-16 Digital Doherty Transmitter with Envelope ΔΣ Modulated Class-D GaN Power Amplifier for 800 MHz band Keiichi Motoi, Andreas Wentzel, Masaaki Tanio, Shinichi Hori, Makoto Hayakawa, Wolfgang Heinrich, Kazuaki Kunihiro, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents a novel transmitter (Tx) architecture combining voltage-mode class-D power amplifiers (PAs) with an efficient 1 -bit envelope delta-sigma modulation scheme for the 800 MHz band. By digitally processing the input 1-bit codes, the proposed Tx operates as a digital Doherty Tx. The proposed Tx architecture is realized with a GaN H-bridge class-D PA module and CMOS modulator ICs and delivers a CW power of 35.9 dBm at 860 MHz with a final-stage drain efficiency of 75.6% at the saturation point. The drain efficiency at 6-dB BO is still 73.4% which corresponds to an improvement of 23.9 points compared to balanced operation. Using a CDMA signal of 1-MHz bandwidth and 6.5-dB peak-to-average power ratio, the digital Doherty Tx achieves an average output power of 28.6 dBm with a drain efficiency of 56.5%. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Class-D / GaN / MMIC / H-Bridge / CMOS / delta-sigma modulation / Doherty power amplifier |
| Paper # | ED2014-131,MW2014-195 |
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| Committee | MW |
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| Conference Date | 2015/1/8(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Microwaves (MW) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Digital Doherty Transmitter with Envelope ΔΣ Modulated Class-D GaN Power Amplifier for 800 MHz band |
| Sub Title (in English) | |
| Keyword(1) | Class-D |
| Keyword(2) | GaN |
| Keyword(3) | MMIC |
| Keyword(4) | H-Bridge |
| Keyword(5) | CMOS |
| Keyword(6) | delta-sigma modulation |
| Keyword(7) | Doherty power amplifier |
| 1st Author's Name | Keiichi Motoi |
| 1st Author's Affiliation | NEC Corporation() |
| 2nd Author's Name | Andreas Wentzel |
| 2nd Author's Affiliation | Ferdinand Braun Institute |
| 3rd Author's Name | Masaaki Tanio |
| 3rd Author's Affiliation | NEC Corporation |
| 4th Author's Name | Shinichi Hori |
| 4th Author's Affiliation | NEC Corporation |
| 5th Author's Name | Makoto Hayakawa |
| 5th Author's Affiliation | NEC Corporation |
| 6th Author's Name | Wolfgang Heinrich |
| 6th Author's Affiliation | Ferdinand Braun Institute |
| 7th Author's Name | Kazuaki Kunihiro |
| 7th Author's Affiliation | NEC Corporation |
| Date | 2015-01-16 |
| Paper # | ED2014-131,MW2014-195 |
| Volume (vol) | vol.114 |
| Number (no) | 392 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |