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| Presentation | 2015-01-16 13:25 Digital Doherty Transmitter with Envelope ΔΣ Modulated Class-D GaN Amplifier for 800 MHz band Keiichi Motoi (NEC), Andreas Wentzel (FBH), Masaaki Tanio, Shinichi Hori, Makoto Hayakawa (NEC), Wolfgang Heinrich (FBH), Kazuaki Kunihiro (NEC)  ED2014-131 MW2014-195 Link to ES Tech. Rep. Archives: ED2014-131 MW2014-195 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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) |
| (in English) | Class-D / GaN / MMIC / H-Bridge / CMOS / delta-sigma modulation / Doherty power amplifier / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 392, MW2014-195, pp. 83-88, Jan. 2015. | |
| Paper # | MW2014-195 | |
| Date of Issue | 2015-01-08 (ED, MW) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | ED2014-131 MW2014-195 Link to ES Tech. Rep. Archives: ED2014-131 MW2014-195 |
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| Conference Information | |
| Committee | MW ED |
| Conference Date | 2015-01-15 - 2015-01-16 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Compound Semiconductor IC and High-Speed, High-Frequency Devices/Microwave Technologies |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2015-01-MW-ED |
| Language | Japanese |
| 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 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 |
| Keyword(8) | |
| 1st Author's Name | Keiichi Motoi |
| 1st Author's Affiliation | NEC corporation (NEC) |
| 2nd Author's Name | Andreas Wentzel |
| 2nd Author's Affiliation | Ferdinand-Braun-Institut (FBH) |
| 3rd Author's Name | Masaaki Tanio |
| 3rd Author's Affiliation | NEC corporation (NEC) |
| 4th Author's Name | Shinichi Hori |
| 4th Author's Affiliation | NEC corporation (NEC) |
| 5th Author's Name | Makoto Hayakawa |
| 5th Author's Affiliation | NEC corporation (NEC) |
| 6th Author's Name | Wolfgang Heinrich |
| 6th Author's Affiliation | Ferdinand-Braun-Institut (FBH) |
| 7th Author's Name | Kazuaki Kunihiro |
| 7th Author's Affiliation | NEC corporation (NEC) |
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| Speaker | Author-1 |
| Date Time | 2015-01-16 13:25:00 |
| Presentation Time | 25 minutes |
| Registration for | MW |
| Paper # | ED2014-131, MW2014-195 |
| Volume (vol) | vol.114 |
| Number (no) | no.391(ED), no.392(MW) |
| Page | pp.83-88 |
| #Pages | 6 |
| Date of Issue | 2015-01-08 (ED, MW) |
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