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ELE Master of Science Thesis Defense by Jason Lee Poirier

When: Tuesday, December 20, 2022
10:00 AM - 12:00 PM
Where: > See description for location
Cost: Free

Location: Science & Engineering Building (SENG), Room 222

Zoom Conference Link:
Meeting ID: 939 9763 8959
Passcode: 917057

Millimeter wavelength (mmWave) electromagnetic waves have found recent use in the deployment of the fifth generation (5G) of cellular data. In just 2021, 5G accounted for 10% of the total global data traffic and is forecasted to rise to 60% in 2027 [1]. However, mmWave bands are limited in penetrative abilities and often require line-of-sight (LOS) connection with signal drops occurring frequently. This leads to limitations in the scalability of mmWave data communications and widespread expansion of 5G and future 6G. To facilitate the expansion of mmWave, small transceiver cells integrated with existing fiber optic networks through radio frequency over fiber (RoF) can provide a viable solution. Radio over fiber is used for transmitting RF signals over long distances through optical fiber. The advantages of RoF include lower loss, improved flexibility, immunity to electromagnetic interference, and most importantly higher data capacity. This work presents the theory, design, and experimental results of two potential solutions for mmWave integration with RoF. The first solution presented is the usage of optical frequency down-conversion where an RF signal can be frequency down-converted using two lasers interfering. This solution is verified experimentally using commercially available bulk lithium niobate modulators at X-band. The second solution combines classical electrical receiver architecture with a high intermediate frequency compatible with conventional RoF links. The modeling and design work includes the creation of a wideband antenna resonant at 82GHz and layout of the necessary commercial of the shelf parts to perform electrical down-conversion.

Dr. Yifei Li, Professor, Department of Electrical & Computer Engineering, UMASS Dartmouth

Committee Members:
Dr. David Brown, Professor, Department of Electrical & Computer Engineering, UMASS Dartmouth
Dr. Dayalan Kasilingam, Professor, Department of Electrical & Computer Engineering, UMASS Dartmouth
Dr. Tariq Manzur, Adjunct Professor, Department of Electrical & Computer Engineering, UMASS Dartmouth; Scientist & Engineer, Naval Undersea Warfare Center (NUWC)

NOTE: All ECE Graduate Students are ENCOURAGED to attend.
All interested parties are invited to attend. Open to the public.

*For further information, please contact Dr. Yifei Li via email at
Contact: > See Description for contact information
Topical Areas: General Public, University Community, College of Engineering, Electrical and Computer Engineering