Bulletin of the American Physical Society
76th Annual Gaseous Electronics Conference
Volume 68, Number 9
Monday–Friday, October 9–13, 2023; Michigan League, Ann Arbor, Michigan
Session DR4: Plasma Semiconductor & RF Applications
1:30 PM–3:30 PM,
Thursday, October 12, 2023
Room: Michigan League, Hussey
Chair: Uwe Czarnetzki, Ruhr-University Bochum, Faculty of Physics and Astronomy
Abstract: DR4.00005 : An EVA Cavity-Based Frequency-Selective Plasma Limiter*
2:45 PM–3:00 PM
Presenter:
Sandeep Narasapura Ramesh
(University of Toledo)
Authors:
Sandeep Narasapura Ramesh
(University of Toledo)
Abbas Semnani
(University of Toledo)
This study presents an innovative Evanescent-mode (EVA) cavity resonator-based frequency-selective limiter that incorporates a gas discharge tube (GDT) within the inter-resonator coupling structure. The device consists of two signal paths: the first path traverses the EVA resonators and GDT, while the second path includes a phase delay line. The limiter exhibits an all-pass response at low input powers due to constructive interference between the signal paths. However, when subjected to high input powers, gas breakdown occurs within the inter-resonator GDT, leading to a phase reversal induced by the plasma's dielectric properties [1]. Consequently, destructive interference between the signals occurs over a narrow frequency band, resulting in a selective band-stop response. Experimental results of the EVA-based plasma FSL will be discussed, showcasing its remarkable attributes, including high power handling capabilities, low insertion loss, fast response time, and notable selectivity performance. The findings of this study highlight the potential of the EVA-based plasma frequency-selective limiter as an effective solution for high-power microwave mitigation, offering enhanced selective protection for sensitive electronic systems.
[1] S.N. Ramesh, A.Semnani, “A Comprehensive Circuit Modeling Approach for Self-Sustained Capacitively Coupled Microwave Plasma” IEEE Transactions on Plasma Science, vol. 49, no. 9, pp. 2690-2699, Sept 2021.
*This work was supported by the Office of Naval Research under Grant Number N00014-21-1-2441.
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