Browsing by Author "Shams S.I."

Now showing 1 - 3 of 3

Citation - WoS: 2
Citation - Scopus: 2
Dual Gap Wideband In-Phase Power Divider Based on Ridge Gap Waveguide Technology
(Institute of Electrical and Electronics Engineers Inc., 2020) Emara M.F.; Allam A.; Shams S.I.; Fawzy D.E.; Elsaadany M.
Power dividers are critical components for mm-wave applications. They are used in antenna feeding structures to provide the suitable excitation in the antenna array systems and deployed in microwave smart beam switching subsystems. In this article a dual gap wideband in-phase power divider is presented. The bandwidth starts at 19 and ends at 40 GHz. We are targeting with this design both the k and ka bands. The proposed design achieved a very deep matching level below -18 dB. © 2020 IEEE.
Citation - WoS: 3
Citation - Scopus: 5
Interfacing Wideband Amplifiers Using Ridge Gap Waveguide for Mm-Wave Systems
(Institute of Electrical and Electronics Engineers Inc., 2020) Shams S.I.; Ali M.M.M.; Sebak A.; Elsaadany M.; Gagnon G.; Fawzy D.E.; Allam A.M.M.A.
The 6G race has already begun, and many countries and giant corporations started directing significant efforts and funds towards the development of the future technology. The 6G standard is expected to migrate to higher bands of frequencies to support wider bandwidth. Through this wide bandwidth, it will be feasible to serve the expected massive number of users and future applications, such as virtual reality and HD realtime transmission. One major problem in high frequency ranges, such as mm-wave bands, is the high signal attenuation, which can be compensated through more efficient amplifier systems. In this paper, we propose a wideband amplifier design fed through a Ridge Gap Waveguide line. The proposed design has many advantages inherited from the host guiding structure. The signal is carried by a Quasi-TEM signal, which minimizes the signal distortion. Also, the structure acts as a large heat sink, which minimizes the operating temperature. As a result, the expected added noise by the proposed amplifier shall be minimal. © 2020 IEEE.
Citation - Scopus: 6
Machine Learning Based Design of Ku Band Ridge Gap Waveguide Slot Antenna Loaded With Fss for Satellite Internet Applications
(Institute of Electrical and Electronics Engineers Inc., 2021) Nakmouche M.F.; Derbal M.C.; Allam A.M.M.A.; Fawzy D.E.; Shams S.I.; Nedil M.; Elsaadany M.
Machine learning has been used in this work for the development of a Ku band Ridge Gap Waveguide (RGW) slot antenna loaded with an FSS superstrate for satellite internet applications. The structure operates from 13.25 to 14.75 GHz with a gain beyond 10 dB using FSS superstrate loading. The developed machine learning model aims to predict the optimal length and width of the radiated slot, where both the Fractional Bandwidth (FBW) and the resonance frequency are considered objective parameters. The simulated results and the anticipated results through the machine learning algorithm are in good agreement. © 2021 IEEE.