Yifei Li

Yifei Li, PhD

Professor

Electrical & Computer Engineering

508-999-8841

508-999-8489

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Science & Engineering 214E


Education

2003Drexel UniversityPhD in Electrical Engineering
2001Drexel UniversityMS in Electrical Engineering
1996Hauzhong University, ChinaBS in Optoelectronics Engineering

Teaching

Programs

Teaching

Courses

Topics of timely interest in electrical and computer engineering. Course content may change from year to year according to instructor's preferences.

Topics of timely interest in electrical and computer engineering. Course content may change from year to year according to instructor's preferences.

Topics of timely interest in electrical and computer engineering. Course content may change from year to year according to instructor's preferences.

Topics of timely interest in electrical and computer engineering. Course content may change from year to year according to instructor's preferences.

Review of transmission line theory. The concept of impedance transformation is presented. The characteristics of coaxial lines, waveguides, and microstrip lines are studied in detail. Propagation and impedance properties of these lines are derived. Smith charts are used for designing matching and tuning circuits. The use of S-parameters and the analysis of multi-port networks are presented. Passive multi-port devices such as microwave power couplers and dividers are described. The fundamentals of microwave and RF filters and resonators are discussed, and their implementation using microstrip lines and waveguides is also presented.

Photonics technologies for radio frequency applications. Principles of radio frequency (RF) photonics are illustrated through their applications in advanced radar, wired/wireless communications, and electronic sensing. Key RF photonics devices including lasers, high frequency modulators, photodetectors, amplifiers and passive circuitries are discussed. System applications including advanced radar system, radio over fiber, and millimeter wave/THz signal generation and processing are considered and analyzed.

Topics of timely interest in Electrical and Computer Engineering. Course content may change from year to year according to instructor's preferences.

Topics of timely interest in Electrical and Computer Engineering. Course content may change from year to year according to instructor's preferences.

Select publications

Yoo, D. K.; Li, Y.; Goldwasser, S. M.; Jemison, W. D.; Herczfeld, P. R. (2008).
“Coupled Optoelectronic Oscillation via Fundamental Mode-Locking in a Composite-Cavity Electro-Optic Microchip Laser”
IEEE/OSA Journal of Lightwave Technology, 26, 824-831.

Li, Y.; Ding, G.H.; Herczfeld, P.R. (2008).
“Photonic phase-locked-loop linear phase demodulator”
Electronics Letters, 44, 375-376.

Li, Y.; Herczfeld P.; Rosen, A.; Bystrom, M.; Jemison, W. (2008).
“Optical down-conversion and digital processing of microwave signals”
Journal of European Microwave Association, 4, 226-235.

Dr. Yifei Li received his B.Eng. in Optoelectronics from Huazhong University of Science and Technology, China, in 1996. He received his MS (2001) and PhD (2003) in Electrical Engineering both from Drexel University, Philadelphia, PA. From 2003 to 2007, he was a research faculty with the Center for Microwave-Lightwave Engineering, Drexel University. In 2007, he joined the ECE Department of the University of Massachusetts Dartmouth, where he is currently a full professor and the director of the RF Photonics Lab. From 2013 to 2014, Dr. Li was a visiting faculty in the Optoelectronic Research Group of the University of California Santa Barbara. Dr. Li’s research interests includes RF photonics, photonic integrated circuits, coherent optical communications, RF devices and systems, and laser physics.

Dr. Li has five US patents in RF Photonics. He has numerous publications in renowned technical journals and international conference proceedings. Since he joined UMassD, he has led 8 competitive research projects funded from the Navy, Airforce and DARPA as the Principle investigator. Dr. Li was a winner of European Microwave Association (EuMA) Young Scientist Prize (1st prize) during the 12th Colloquium on Microwave Communications held in Budapest, Hungary. He was a winner of 2008 DARPA MTO Young Faculty Award.

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