This Problem of the Day (PotD) post comes from a historically significant ECE test, from an RFID class that Manos Tentzeris and I developed 10 years ago. The question asks how a biased tunnel diode increases reflected power and range from a backscatter antenna. This idea of using an active, negative-resistance region device for backscatter has popped up in the patent literature from time to time, but Georgia Tech PhD Francesco Amato performed some of the first microwave backscatter measurements with his custom-built Quantum Tunnel Modulator (QTM) tag. This illustrated the feasibility of the idea, published in 2015. The use of a tunnel diode modulator for backscatter has been investigated by researchers in UI Chicago, Sweden, and more Sweden.
Jacob Smith Named 2018 William Brown Fellowship Winner
This fall term, Jake Smith was been named the 2018 winner of the 2018 William Brown Fellowship for his work on wireless power transfer. Jake is currently working on a microwave power transfer demo, building a rectenna for a 5.8 GHz system magnetron-based system. An ORS alum, Jake is also serving as a mentor for the ORS Haiti-RELAY team, which is bringing low-cost electrical solutions to the poor in developing countries. Jake received his BSEE in Spring 2018.
The William Brown Fellowship was established in 2013 at Georgia Tech by friends and family of William Brown, the father of wireless power transfer. This year, a generous grant from the Space Solar Power Institute is being used with the fellowship to fund a graduate research assistantship dedicated to wireless power transfer work.
WWB10: Inductive Coupling for Communications
We discuss the use of inductive loops in the transfer of information for RFID and NFC systems.
WWB10: Inductive Coupling for Communications
Paper: J. Fischer, “NFC in Cell Phones: The New Paradigm for an Interactive World.” IEEE Communications Magazine, June 2009.
Opening of the Van Leer Interdisciplinary Design Commons
The new Van Leer Interdisciplinary Design Commons is opened at the end of September. Open to all GT students, faculty, and staff, the space located in the former Van Leer rotunda classroom has laser cutters, 3D printers, soldering stations, testing equipment, PCB millers, and much more. Time for some hand-on design projects!
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