Senior PhD candidate Mohammad Alhassoun visited the 2019 IEEE Consumer Communications & Networking Conference (CCNC) in Las Vegas, NV. There he presented a paper on the unique small-scale fading properties of a retrodirective backscatter channel. These channels have garnered a lot of interest lately due to their low-powered, long-distance link capabilities, which excites the “Internet of Things” community. Below are the slides from the talk, entitled “Spatial Fading in Backscatter Channels: Theory and Models.”
Theory and Design of a Retrodirective Rat-Race-Based RFID Tag
Mohammad Alhassoun, Michael A. Varner, Gregory D. Durgin
IEEE Journal of Radio Frequency Identification
The full-length journal paper on Mohammad Alhassoun’s rat-race design for retro directive RFID tags is now available on IEEExplore. The work presents a new design for a microwave antenna and feed topology that allows a single IC to control retro directive behavior and modulate information back to a reader. This invited paper was an extension of the award-winning conference paper by Mr. Alhassoun.
Low-power and Compact Microwave RFID Reader for Sensing Applications in Space
Cheng Qi, Joshua D. Griffin, Gregory D. Durgin
IEEE International Conference on RFID Technology & Application (RFID-TA)
Macau SER, Sep 2018, 6 pages
Paper from the IEEE RFID-TA 2018 conference presenting the latest generation microwave backscatter reader developed by the lab. Winner of the best student paper award.
Tunnel Diodes for Backscattering Communications
Francesco Amato, Gregory D. Durgin
2018 2nd URSI Atlantic Radio Science Meeting (AT-RASC)
The authors give an overview about the research progresses done in the latest years to enhance ranges of microwave backscattering communications with RFIDs exploiting the tunneling effect of tunnel diodes. The first prototype of a Tunneling RFID Tag built using a tunnel diode outperformed semi-passive tags by at least a factor of 5 in range. Tests on the 5.8 GHz backscattering link reached 1.5 km of ranges and demonstrated that a DC power of only 20.4 μW and 2.9[pJ/bit] are required to operate the Tunneling Tag.