2026-09-19T23:49:01Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1071022026-06-06T00:55:33Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Giovanni Traverso.
Abid, Abubakar
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2017-02-22T19:03:38Z
2017-02-22T19:03:38Z
2016
2016
http://hdl.handle.net/1721.1/107102
971483315
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 77-80).
In this thesis, I introduce a novel ingestible electronic device designed to reside inside the stomach for weeks or longer with both wireless communication and wireless powering capabilities. The device is powered by a transmitter outside of the body via wireless power transfer through 5 to 6 cm of tissue, while keeping under specific absorption of radiation limits. Electromagnetic theory and microwave simulations identified the optimal region of operation for transmitting power through tissue as around 1 GHz. Small loop antennas fabricated to fit onto a circuit board the size of a pill capsule exhibited power transfer efficiencies of around -45 dB when tested ex vivo in pig stomach tissue. Choice of electronic components for rectification, sensing, and wireless communication are also discussed, as well as electrical and material characterization of an encapsulated device, to show that an end-to-end wireless ingestible electronic device is feasible for gastroresident applications.
by Abubakar Abid.
M.Eng.
80 pages
eng
Massachusetts Institute of Technology
MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission.
http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
Ingestible electronics without batteries : power and communication for gastroresident devices
Power and communication for gastroresident devices
Thesis
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Publication
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