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Ahmed F. Abdelshafy
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Exceptional points of degeneracy induced by linear time-periodic variation
H Kazemi, MY Nada, T Mealy, AF Abdelshafy, F Capolino
Physical Review Applied 11 (1), 014007, 2019
642019
Exceptional points of degeneracy in periodic coupled waveguides and the interplay of gain and radiation loss: Theoretical and experimental demonstration
AF Abdelshafy, MAK Othman, D Oshmarin, AT Almutawa, F Capolino
IEEE Transactions on Antennas and Propagation 67 (11), 6909-6923, 2019
612019
Distributed Degenerate Band Edge Oscillator
A F Abdelshafy, D Oshmarin, M A K Othman, M Green, F Capolino
IEEE Transactions on Antennas and Propagation 69 (3), 1821 - 1824, 2020
242020
Experimental testing of a 3-D-printed metamaterial slow wave structure for high-power microwave generation
AB de Alleluia, AF Abdelshafy, P Ragulis, A Kuskov, D Andreev, ...
IEEE Transactions on Plasma Science 48 (12), 4356-4364, 2020
232020
Electron-beam-driven devices with synchronous multiple degenerate eigenmodes
AF Abdelshafy, MAK Othman, F Yazdi, M Veysi, A Figotin, F Capolino
IEEE Transactions on Plasma Science 46 (8), 3126-3138, 2018
232018
Exceptional point of degeneracy in a backward-wave oscillator with distributed power extraction
T Mealy, AF Abdelshafy, F Capolino
Physical Review Applied 14 (1), 014078, 2020
212020
Exceptional Degeneracies in Traveling Wave Tubes with Dispersive Slow-Wave Structure Including Space-Charge Effect
K Rouhi, R Marosi, T Mealy, AF Abdelshafy, A Figotin, F Capolino
arXiv preprint arXiv:2103.14767, 2021
182021
Experimental demonstration of a new oscillator concept based on degenerate band edge in microstrip circuit
D Oshmarin, AF Abdelshafy, A Nikzamir, MM Green, F Capolino
arXiv preprint arXiv:2109.07002, 2021
162021
High power microwave sources and technologies using metamaterials
JW Luginsland, JA Marshall, A Nachman, E Schamiloglu
John Wiley & Sons, 2021
122021
Exceptional degeneracy in a waveguide periodically loaded with discrete gain and radiation loss elements
AF Abdelshafy, T Mealy, E Hafezi, A Nikzamir, F Capolino
Applied Physics Letters 118 (22), 224102, 2021
102021
Backward-wave oscillator with distributed power extraction based on exceptional point of degeneracy and gain and radiation-loss balance
T Mealy, AF Abdelshafy, F Capolino
2019 International Vacuum Electronics Conference (IVEC), 1-2, 2019
102019
High-power backward-wave oscillator using folded waveguide with distributed power extraction operating at an exceptional point
T Mealy, AF Abdelshafy, F Capolino
IEEE Transactions on Electron Devices 68 (7), 3588-3595, 2021
82021
The degeneracy of the dominant mode in rectangular waveguide
T Mealy, AF Abdelshafy, F Capolino
2019 United States National Committee of URSI National Radio Science Meeting …, 2019
82019
Microwave circuits with exceptional points and applications in oscillators and sensors
MY Nada, H Kazemi, AF Abdelshafy, F Yazdi, D Oshmarin, T Mealy, ...
2018 18th Mediterranean Microwave Symposium (MMS), 108-111, 2018
82018
High-Power -Band Relativistic Backward-Wave Oscillator with Exceptional Synchronous Regime Operating at an Exceptional Point
T Mealy, AF Abdelshafy, F Capolino
Physical Review Applied 15 (6), 064021, 2021
72021
Exceptional point of degeneracy in linear-beam tubes for high power backward-wave oscillators
T Mealy, AF Abdelshafy, F Capolino
arXiv preprint arXiv:2005.08912, 2020
42020
Various topologies of coupled-mode structures exhibiting exceptional points of degeneracy
MY Nada, AF Abdelshafy, T Mealy, F Yazdi, H Kazemi, A Figotin, ...
2018 International Conference on Electromagnetics in Advanced Applications …, 2018
42018
A 3D-printed metamaterial slow wave structure for high-power microwave generation
AB De Alleluia, A Kuskov, D Andreev, E Schamiloglu, AF Abdelshafy, ...
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC), 99-100, 2020
32020
Design of substrate integrated waveguides supporting degenerate band-edge resonances
T Zheng, M Casaletti, AF Abdelshafy, F Capolino, Z Ren, G Valerio
2019 13th European Conference on Antennas and Propagation (EuCAP), 1-3, 2019
32019
High-sensitive parity-time symmetric oscillator in coupled transmission lines with nonlinear gain
H Kazemi, A Nikzamir, T Mealy, A Abdelshafy, F Capolino
IEEE Journal of Microwaves 2 (3), 389-400, 2022
22022
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