Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Ahmad T. Almutawa"'
Autor:
Farshad Yazdi, Dmitry Oshmarin, Tarek Mealy, Ahmad T. Almutawa, Alireza Nikzamir, Filippo Capolino
Publikováno v:
Physical Review Applied. 17
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6626a73900c7f8a19d9e0e6bc1befcbb
https://doi.org/10.1103/physrevapplied.17.064049
https://doi.org/10.1103/physrevapplied.17.064049
Autor:
David R. Jackson, Hamidreza Kazemi, Filippo Capolino, Stuart A. Long, Sohini Sengupta, Ahmad T. Almutawa
Publikováno v:
IEEE Transactions on Antennas and Propagation. 68:1289-1301
A 2-D periodic leaky-wave antenna (LWA) is a planar structure that radiates from high-order space harmonics (Floquet waves) of a leaky mode that propagates radially outward on a structure. The structure chosen here consists of a 2-D periodic cross-sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e6ed5ef9c5d93a228c7d768a689dce5
https://doi.org/10.1109/tap.2019.2948524
https://doi.org/10.1109/tap.2019.2948524
Autor:
Ahmad T. Almutawa
Publikováno v:
2021 International Conference on Electromagnetics in Advanced Applications (ICEAA).
The rapid development in the field of topological physics rises from condensed matter promises a new phenomenon of waves-matter interaction in a topological photonic system. These topologically protected photonics structural systems are insulators in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78370c7e8d642b5e9f6a06cd23ec9132
https://doi.org/10.1109/iceaa52647.2021.9539586
https://doi.org/10.1109/iceaa52647.2021.9539586
Autor:
Filippo Capolino, Ahmed F. Abdelshafy, Dmitry Oshmarin, Mohamed A. K. Othman, Ahmad T. Almutawa
Publikováno v:
IEEE Transactions on Antennas and Propagation. 67:6909-6923
We present a novel paradigm for dispersion engineering in coupled transmission lines (CTLs) based on exceptional points of degeneracy (EPDs). We also develop a theory for fourth-order EPDs consisting of four Floquet–Bloch eigenmodes coalescing into
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29eeedd9ef94665214566bfc9cea7a64
https://doi.org/10.1109/tap.2019.2922778
https://doi.org/10.1109/tap.2019.2922778
Publikováno v:
IEEE Transactions on Antennas and Propagation. 67:5163-5175
The radiation properties of wideband Fabry–Perot cavity (FPC) antennas have been investigated by studying the non-Foster behavior of the reflection coefficient phase of the thick partially reflective surface (PRS) forming the cavity. In order to be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12ea8bf342812a36e2db4af834a2e787
https://doi.org/10.1109/tap.2019.2911349
https://doi.org/10.1109/tap.2019.2911349
Autor:
Stuart A. Long, Ahmad T. Almutawa, Filippo Capolino, David R. Jackson, Sohini Sengupta, Hamidreza Kazemi
Publikováno v:
IEEE Transactions on Antennas and Propagation. 67:3560-3573
A study of the radiation characteristics of a 2-D periodic leaky-wave antenna (LWA) [i.e., one that radiates from higher order space harmonics (Floquet waves) instead of the fundamental one] is presented here for the first time, and an optimization t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03f88367dea1f235aa98e57bedefd20e
https://doi.org/10.1109/tap.2019.2902639
https://doi.org/10.1109/tap.2019.2902639
Publikováno v:
2020 IEEE/MTT-S International Microwave Symposium (IMS).
An ultrathin antenna of thickness nearly 100th of the wavelength is presented, which is capable of providing small-scale beam steering. The antenna is inspired by concepts used in high impedance surfaces (HISs) A linear array antenna comprised of per
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3625d2ae11526c71fceb4f80a91239b
https://doi.org/10.1109/ims30576.2020.9223801
https://doi.org/10.1109/ims30576.2020.9223801
Autor:
Filippo Capolino, Ahmad T. Almutawa
Publikováno v:
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting.
This paper demonstrates the use of a 2-D sparse array feeding as a primary excitation source of a wideband planar Fabry-Perot Cavity (FPC) antenna for gain enhancement. The antenna is constructed from a thick partially reflective surface (PRS) mounte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7415dcbb719645d1131e56078cf91d89
https://doi.org/10.1109/ieeeconf35879.2020.9329953
https://doi.org/10.1109/ieeeconf35879.2020.9329953
Publikováno v:
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting.
An ultrathin antenna based on a curved high impedance surface (HIS) is designed, which has wide beamscanning capability if the leaky wave is excited by proper selection of the feed location. The HIS-inspired curved printed antenna exploits the leaky
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60ce08d933b7cef5313125d3bb50a287
https://doi.org/10.1109/ieeeconf35879.2020.9330454
https://doi.org/10.1109/ieeeconf35879.2020.9330454
Autor:
M. M. Reazul Haque Tanmoy, M. Mubasshir Hossain, Filippo Capolino, Saeed I. Latif, Ahmad T. Almutawa
Publikováno v:
2020 SoutheastCon.
This paper presents a technique for obtaining wide gain-bandwidth from an ultrathin leaky wave-based high impedance surface (HIS) antenna. By properly selecting multiple feed locations over a linear dogbone-shaped patch array antenna, its gain bandwi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e52b06bd5910d26e5982b1cc3c12bd04
https://doi.org/10.1109/southeastcon44009.2020.9249724
https://doi.org/10.1109/southeastcon44009.2020.9249724