June 12, 2024 @ 12:00 pm – 1:00 pm America/New York Timezone

Antennas & Propagation Society

Zoom link will be sent to registrants before the event.


Next-generation wireless RF systems are expected to contain multi-functional, highly flexible, and tightly integrated front-ends for achieving agile use of the frequency spectrum. In the past decade, this has led to research on filtering antennas, or filtennas, in which the functionality of the antenna and filter is combined into a single highly integrated module that achieves the function of both components with a higher-order transfer function. These filtennas can have improved performance, size, and cost. Furthermore, by incorporating frequency-agility, a filtenna can provide adaptation to changing radio environments. One of the challenges in realizing a reconfigurable filtenna is that two dissimilar elements need to be tuned in tandem.

This presentation covers recent developments in the design of reconfigurable filtennas in the S-band (2-4 GHz) and X-band (8-12 GHz). The filtennas are based on using evanescent-mode cavities as the backing for slot antennas. A discussion of available tuning mechanisms and the challenges of going from S-band to X-band is included. Second-order reconfigurable filtenna proof-of-concept prototypes are shown in both frequency bands. The prototype filtennas are created using commercially available printed circuit board materials and tuning elements and measured in an anechoic chamber. The S-band filtenna can continuously tune from 2 to 2.6 GHz while achieving a realized gain between 2.7 to 5.2 dB, respectively. The X-band filtenna demonstrates tuning from 9.6 to 11.1 GHz, with a maximum gain of 5 dB. Overall, with the demonstrated performance, these elements are promising components for future wireless communications and radar systems.


Jessica E. Ruyle (M’05–SM’16) was born in Shawnee, OK USA in 1984. She received a B.S. degree in electrical engineering from Texas A&M University, College Station in 2006 and an M.S and Ph.D. degree in electrical engineering from the University of Illinois at Urbana-Champaign in 2008 and 2011 respectively.

From 2006 to 2011, she was a Graduate Research Assistant at the University of Illinois at Urbana-Champaign. From 2012 to 2019, she was an Assistant Professor with the School of Electrical and Computer Engineering, University of Oklahoma, Norman. In 2019 she was promoted to Associate Professor in Electrical and Computer Engineering at the University of Oklahoma. She is an Advanced Radar Research Center (ARRC) member at the University of Oklahoma (OU). She holds two patents for her antenna designs. Her research interests are in the development and characterization of new electromagnetic devices and platforms such as antennas and packaging to improve the performance of radiating systems in challenging environments.

Prof. Ruyle is a member of Tau Beta Pi and Eta Kappa Nu. She is the recipient of a DARPA Young Faculty Award for her work in highly conformal, placement insensitive antennas and was named a William H. Barkow Presidential Professor at OU. She is also an IEEE Senior Member and an Associate Editor for IEEE Antennas and Wireless Propagation Letters.