Georgia Tech ECE Research Group
2008: Josh Griffin built a custom 5.8 GHz down-converter and demonstrated tag gains at 5.8 GHz when small, multiple tags are modulated jointly. Thus, Griffin modulation was born! Josh Griffin demonstrates how the modulation of two antennas beside … [Continue reading]
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 Year: 2018 The full-length journal paper on Mohammad Alhassoun's rat-race design … [Continue reading]
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 … [Continue reading]
In this set of notes, an electromagnetic model of rough surface scattering is presented, with analogies drawn to rendering and shading models in computer graphics. Although this originates in an RF-centric modeling class, the analogy to optics is … [Continue reading]