2026-09-19T07:29:05Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/627512022-01-13T07:54:29Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Ravi Sundar and Elfar Adalsteinsson.
Torres Chico, Gabriel
Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2011-05-09T15:30:03Z
2011-05-09T15:30:03Z
2010
2010
http://hdl.handle.net/1721.1/62751
717630659
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 45-46).
In this thesis, a polar-feedback linearization system for use with MRI RF power amplifiers was designed and simulated. The design here presented is intended to replace Analogic's (located in Peabody, Massachusetts) feed-forward, digital linearization scheme. This involved the selection and testing of components meeting the stringent specifications required for a high enough level of fidelity, as well as a simulation of the amplitude loop of the linearization system designed using the data acquired from one of Analogic's RF power amplifiers and the components selected. The intention of the simulation is to show that a polar-feedback solution is an effective method for linearizing the response of the RF power amplifier. A protype system to test the feasibility of the design in real conditions was also constructed.
by Gabriel Torres Chico.
M.Eng.
46 p.
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by
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http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
RF power amplifier linearity compensation for MRI systems
Radio frequency power amplifier linearity compensation for magnetic resonance imaging systems
Thesis
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<Abstract>In this thesis, a polar-feedback linearization system for use with MRI RF power amplifiers was designed and simulated. The design here presented is intended to replace Analogic's (located in Peabody, Massachusetts) feed-forward, digital linearization scheme. This involved the selection and testing of components meeting the stringent specifications required for a high enough level of fidelity, as well as a simulation of the amplitude loop of the linearization system designed using the data acquired from one of Analogic's RF power amplifiers and the components selected. The intention of the simulation is to show that a polar-feedback solution is an effective method for linearizing the response of the RF power amplifier. A protype system to test the feasibility of the design in real conditions was also constructed.</Abstract>
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