Congratulations to Tianchong (Michael) Jiang for completing his MS thesis entitled, “Tri-band Object-Resistant Antenna Design.” Tianchong performed an outstanding original design, build, and test for a triple-band ISM antenna. Not only did the antenna function well at the target bands, but incorporated object resistance techniques developed at the GTPG. The methodology will be valuable for designing future antennas in commercial wireless devices.
Archives for September 2018
WWB04: Exotic Devices and Limits of RF Harvesting
Part of the Wireless Without Batteries lecture series. We discuss various how the state-of-the-art in nano-devices are used in RF energy-harvesting and their fundamental limits at low power levels.
WWB04: Exotic Devices and Limits of RF Harvesting
Paper: S. Hemour and K. Wu, “Radio-Frequency Rectifier for Electromagnetic Energy Harvesting: Development Path and Future Outlook,” Proceedings of the IEEE, vol. 102, no. 11, pp. 1667–1691, Nov 2014.
Reading: T.S. Rappaport, Wireless Communications Principles and Practice, 2nd ed, Ch 4, 2003.
High-Voltage Plasma Effects on Antennas
In 2013, Marcin Morys put together an excellent study in channel measurement and modeling of coronating antennas in high-voltage environments. In general, there was (and still is) a lack of understanding of high-voltage effects on antennas by a profession that wishes to proliferate “smart grid” sensors on power lines and high-voltage equipment. Morys’ comprehensive study in theory and practical measurement was the most complete treatment of the otherwise neglected field of antennas at high voltage. In particular, the effects of corona and both the noise processes and radiation alteration caused by these high-voltage plasmas proved to be one of the most original contributions of not only Morys’ work, but the lab in general. Download the following set of notes on the subject of plasma antennas.
Perfect Pulses … Used to Make Anti-Reflective Surfaces
At the recent IEEE Antennas and Propagation Symposium (APS), Mike Varner presented work by Alhassoun, Varner, and Durgin on the use of perfect pulses to suppress specular reflections on a highly reflective surface. A classic use of this problem is the reduction of radar signatures of aircraft hangers and other buildings near runways. The flat faces of these structures can often produce large radar returns/multipath that distort ranging by either the air traffic control tower or a descending plane. This presentation provides a unique use of the perfect pulse theory invented here at Georgia Tech to build a solution.