RF power amplifier linearity compensation for MRI systems

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.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2010

Author dc:creator

• Torres Chico, Gabriel

Advisor dc:contributor.advisor

• Ravi Sundar and Elfar Adalsteinsson.

• Electrical Engineering and Computer Science.

Statement dc:rights

• 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.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/62751

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/62751