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News and Resources for the Durgin Research Group

WWB12: Multi-Antenna Signaling

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This lecture presents the concept of multi-antenna backscatter signaling with multiple reader and tag antennas.  The key paper for review is Josh Griffin’s ground-breaking work on MIMO signaling with backscatter tags.  We also discuss the interesting small-scale fading behaviors that can arise in these scenarios.

WWB12: Multi-Antenna Signaling

Paper: J.D. Griffin, G.D. Durgin. “Multipath Fading Measurements at 5.8 GHz for Backscatter Tags With Multiple Antennas.” IEEE Transactions on Antennas and Propagation, vol 58, no 11, Nov 2010.

WWB11: Modulated Backscatter

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Introductory lesson on the use of load modulation to transfer information from an antenna to a reader.  The lecture describes how to construct a link budget given all of the realistic effects encountered in the terrestrial backscatter world.

WWB11:  Modulated Backscatter

Paper:  J.D. Griffin, G.D. Durgin. “Complete Link Budgets for RFID and Backscatter Radio.” IEEE Antennas and Propagation and Magazine, April 2009. 10 pages.

WWB09: Inductive Transfer of Wireless Power

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In this video, we discuss the transfer of wireless power through inductive/near-field systems that use resonant coupling of loops to transfer energy.  A discussion of conventional and over-coupled systems is included.

WWB09: Inductive Transfer of Wireless Power

Paper:  A.P. Sample, D.A. Meyer, J.R. Smith, “Analysis, Experimental Results, and Range Adaptation of Magnetically Coupled Resonators for Wireless Power Transfer,” IEEE Transactions on Industrial Electronics, vol 58, no 2, Feb 2011.