TY - JOUR
T1 - Electrically Tunable Microwave Absorber Based on Discrete Plasma-Shells
AU - Payne, Komlan
AU - Xu, Kevin
AU - Choi, Jun H.
AU - Lee, Jay Kyoon
N1 - Funding Information:
Manuscript received November 1, 2018; revised May 9, 2019; accepted June 6, 2019. Date of publication July 2, 2019; date of current version October 4, 2019. This work was supported in part by the Air Force Office of Scientific Research (AFOSR) under Award FA9550-17-1-0111 and in part by Syracuse University through computational resources. (Corresponding author: Komlan Payne.) K. Payne and J. K. Lee are with the Department of Electrical Engineering and Computer Science, Syracuse University, Syracuse, NY 13244 USA (e-mail: kopayne@syr.edu; leejk@syr.edu).
Publisher Copyright:
© 2019 IEEE.
PY - 2019/10
Y1 - 2019/10
N2 - This paper presents the feasibility of deploying a large-scale tunable absorber based on discrete plasma-shells. The proposed conductor-baced absorber is realized by integrating ceramic gas-encapsulating chambers (plasma-shells) and a closely coupled lossy resonant layer that also serves as a biasing electrode to sustain the plasma. Two topologies comprising lossy inductive or capacitive layers are investigated to realize tunable microwave absorbers. The plasma is sustained by a sinusoidal radio frequency (RF) voltage source coupled directly through the walls of the plasma-shells. These active frequency-selective absorbers are analyzed using a transmission line approach to provide the working principle and its frequency tuning capability. By varying the voltage of the sustainer, the plasma can be modeled as a lossy, variable, frequency-dependent inductor, providing a dynamic tuning response of the absorption spectral band. A prototype plasma-tuned absorber is fabricated and measured in a free space environment to validate the concept. A good agreement between the equivalent circuit model, full-wave electromagnetic simulation, and the measurement results is obtained.
AB - This paper presents the feasibility of deploying a large-scale tunable absorber based on discrete plasma-shells. The proposed conductor-baced absorber is realized by integrating ceramic gas-encapsulating chambers (plasma-shells) and a closely coupled lossy resonant layer that also serves as a biasing electrode to sustain the plasma. Two topologies comprising lossy inductive or capacitive layers are investigated to realize tunable microwave absorbers. The plasma is sustained by a sinusoidal radio frequency (RF) voltage source coupled directly through the walls of the plasma-shells. These active frequency-selective absorbers are analyzed using a transmission line approach to provide the working principle and its frequency tuning capability. By varying the voltage of the sustainer, the plasma can be modeled as a lossy, variable, frequency-dependent inductor, providing a dynamic tuning response of the absorption spectral band. A prototype plasma-tuned absorber is fabricated and measured in a free space environment to validate the concept. A good agreement between the equivalent circuit model, full-wave electromagnetic simulation, and the measurement results is obtained.
KW - Active high impedance surface
KW - circuit analog absorber (CAA)
KW - lossy frequency selective surfaces (FSSs)
KW - radar cross section (RCS)
KW - radio frequency (RF) plasma discharge
KW - tunable absorber
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U2 - 10.1109/TAP.2019.2925185
DO - 10.1109/TAP.2019.2925185
M3 - Article
AN - SCOPUS:85073594361
VL - 67
SP - 6523
EP - 6531
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
SN - 0018-926X
IS - 10
M1 - 8753721
ER -