Phase manipulation for efficient radio frequency transmission
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.
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| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2013
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| Online Access: | http://hdl.handle.net/1721.1/78474 |
| _version_ | 1811081463672602624 |
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| author | Barton, Taylor Wallis |
| author2 | James K. Roberge. |
| author_facet | James K. Roberge. Barton, Taylor Wallis |
| author_sort | Barton, Taylor Wallis |
| collection | MIT |
| description | Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012. |
| first_indexed | 2024-09-23T11:47:05Z |
| format | Thesis |
| id | mit-1721.1/78474 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:47:05Z |
| publishDate | 2013 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/784742019-04-10T12:25:01Z Phase manipulation for efficient radio frequency transmission Barton, Taylor Wallis James K. Roberge. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science. Electrical Engineering and Computer Science. Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012. Cataloged from PDF version of thesis. Includes bibliographical references (p. 109-112). Power amplifiers (PAs) for microwave communications are generally the most power-hungry element of a transmitter. High linearity is required for modern digital communications standards, and often is achieved at the expense of efficiency. Outphasing architectures, which combine multiple nonlinear but efficient switching PAs into a system with an overall linear response, represent a promising strategy for breaking the efficiency/linearity tradeoff inherent to conventional PAs. This work explores methods for efficient PA design using outphasing techniques. Two aspects of outphasing design are considered. First, a wide-band phase modulator is introduced that uses a single current-steering digital to analog converter (DAC) structure and discrete clock prerotation. This topology takes advantage of specifications particular to outphasing architectures to reduce matching requirements as compared to a two-DAC phase modulator while providing wideband capability. The phase modulator is demonstrated in 65-nm CMOS, operates over a carrier frequency range of 1.2-4.2 GHz and has a 12-bit phase resolution and sample rate of 160 MSamples/second. The second technique is a novel four-way lossless power combiner and outphasing system which provides ideally lossless power combining along with resistive loading of switching power amplifiers over a wide output range. This work presents the first-ever demonstration of this system at microwave frequencies. Particular attention is paid to the microwave-specific aspects of implementation. A 60-W GaN prototype demonstrates the outphasing and dynamic performance, which closely matches the expected performance despite the challenges of operating at microwave frequencies. by Taylor Wallis Barton. Sc.D. 2013-04-12T19:27:34Z 2013-04-12T19:27:34Z 2012 2012 Thesis http://hdl.handle.net/1721.1/78474 834096818 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 113 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Electrical Engineering and Computer Science. Barton, Taylor Wallis Phase manipulation for efficient radio frequency transmission |
| title | Phase manipulation for efficient radio frequency transmission |
| title_full | Phase manipulation for efficient radio frequency transmission |
| title_fullStr | Phase manipulation for efficient radio frequency transmission |
| title_full_unstemmed | Phase manipulation for efficient radio frequency transmission |
| title_short | Phase manipulation for efficient radio frequency transmission |
| title_sort | phase manipulation for efficient radio frequency transmission |
| topic | Electrical Engineering and Computer Science. |
| url | http://hdl.handle.net/1721.1/78474 |
| work_keys_str_mv | AT bartontaylorwallis phasemanipulationforefficientradiofrequencytransmission |