The Propagation Group

Georgia Tech ECE Research Group

Home of the Georgia Tech Propagation Group

News and Resources for the Durgin Research Group
  • Home
    • News
    • Positions
  • Education
    • Problem of the Day
    • ECE 3025 Electromagnetics
    • ECE 4370 Antenna Eng.
    • ECE 6361 Microwave Design Lab
    • ECE 6390 Satellite Communications
    • ECE 8833 Advanced Analytical Emag
  • Research
    • Backscatter Radio
    • Radiolocation
    • Wireless Power
    • Propagation Measurement and Modeling
  • Workshops
    • Space Solar Power/ Microwave Power Transfer
    • Wireless MoCap
    • Gen3 RFID
  • Publications
    • Google Scholar Page
    • IEEExplore
    • YouTube Channel
    • Research Gate
    • EJECT!
  • People
    • Prof. Gregory D. Durgin
    • Current Members
    • PhD Alumni
    • Other Alumni
  • Partners
    • Sponsors
    • Opportunity Research Scholars
    • Georgia Tech ECE

Low-Observable Reflectors Using Perfect Pulses

Posted on January 16, 2019 Written by Gregory Durgin


Low-Observable Reflectors Using Perfect Pulses
Mohammad Alhassoun, Michael A. Varner, Gregory D. Durgin
2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting
Year: 2018, Page s: 915 – 916

This paper presents a new technique for suppressing specular reflection using binary reflective surfaces (such as those easily fabricated on a printed circuit board)that maximally suppress mean currents on the reflector using the theory of perfect pulses. We simulate multiple versions (or orders)of these structures to characterize the nulling depth and manufacturing tolerance of the designs. In addition, we run another set of simulations to characterize the specular reflection as a function of the direction of incidence. The simulation reveals that the specular reflection from the proposed structures is at least 9.3 dB less than that from a flat metal plate of the same dimensions.

Filed Under: Propagation Modeling

2011: R.E.S.T. Platform @ 5.8 GHz

Posted on January 14, 2019 Written by Gregory Durgin



Chris Valenta designed the R.E.S.T. platform, a modular 5.8 GHz backscatter platform with a software radio reader that could be configured for a limitless combination of sensors, antennas, power sources, and modulation schemes.

The R.E.S.T. (RFID-Enabled Sensing Testbed) was published as a flexible development platform that allowed the group to experiment with all sorts of 5.8 GHz application platforms.  It was the quintessential low-power, microcontroller-based backscatter system.

Fun fact: although they did not exactly use the original R.E.S.T hardware, future group applications — the helmet shock sensor, the motion capture experiments, the ATM terminal protection system, and others — were based on the R.E.S.T.’s architecture.

Filed Under: Backscatter Radio

WWB16: Balance Coding

Posted on January 11, 2019 Written by Gregory Durgin

A lecture on the history, use, and backscatter applicability of balance codes.  Balance codes (also called recording codes, channel codes, line codes, or modulation codes) have been used in magnetic tape drives, swipe cards, optical disks, and many more places.  This lecture discusses and updates the concept with respect to backscatter channels.

WWB16:  Balance Coding

Paper:  G.D. Durgin. “Balanced Codes for More Throughput in RFID and Backscatter Links”.  IEEE RFID-TA 2015. Tokyo, Japan. 16-18 September 2015.

 

 

Filed Under: Backscatter Radio

WWB15: Backscatter Demodulation

Posted on January 9, 2019 Written by Gregory Durgin



This lecture discusses the receiver architecture of a backscatter reader, explaining the nature of coherent detection and direct down-conversion.  The nature of these receivers introduces interesting behavior in terms of noise, sensitivity, and dynamic range.  A discussion of the “orange noise” model for these receivers is included.

WWB15:  Backscatter Demodulation

Paper:  G.D. Durgin, C.R. Valenta, M.B. Akbar, M.M. Morys, B.R. Marshall, Y. Lu. “Modulation and Sensitivity Limits for Backscatter Receivers.” IEEE RFID Conference, Orlando, FL. May 2013.

Filed Under: Backscatter Radio

  • « Previous Page
  • 1
  • …
  • 21
  • 22
  • 23
  • 24
  • 25
  • …
  • 71
  • Next Page »

Conference Watch

IEEE RFID 2021 (hybrid)
27-29 April 2021, Phoenix, AZ
Submission Deadline:  2 February 2021

IEEE IMS 2021 (hybrid)
6-11 June 2021, Atlanta, GA
Submission Deadline: 15 Dec 2021

IEEE ICC 2021
14-18 June 2021, Montreal, Canada
Submission Deadline:  20 Jan 2021

IEEE APS 2021
10-16 July 2021, Singapore
Submission Deadline:  15 Jan 2021

IEEE RFID-TA 2021
September 2021, Aveiro, Portugal
Submission Deadline:  June 2021

IEEE WiSEE 2021
10-12 October 2021, Cleveland, OH
Submission Deadline:  1 July 2021

Archives

Copyright © 2025 · Focus Pro on Genesis Framework · WordPress · Log in