Browsing by Author "Shams, Shoukry, I"

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Citation - WoS: 2
Citation - Scopus: 3
On the Design of Reconfigurable Wideband Ridge Gap Waveguide Amplifier Modules
(IEEE, 2020) Elsaadany, Mahmoud; Shams, Shoukry, I; Ali, Mohamed Mamdouh M.; Sebak, Abdelrazik; Gagnon, Ghyslain; Fawzy, Diaa E.; Allam, A. M. M. A.
The near-to-launch 5G standard for wireless communications did not seal the ultimate use the mm-wave bands. As a result, the future 6G standard is expected to proceed in more efficient utilization of these bands. One of the most critical elements in the RF link is the amplifier, especially when the attenuation of the channel is relatively high which is the case for the mm-wave bands. In this work, a reconfigurable design of a wideband amplifier is presented to operate in the band 34 GHz to 38 GHz. The line parameters are investigated to study the tune-ability of this configuration. In particular, changing the parasitic loading by varying lines width can achieve a matching level beyond 15 dB over partial band operations based on the configuration. The availability of such a reconfigurable module will pave the way for efficient 6G development.
Citation - WoS: 5
Citation - Scopus: 12
Ridge Gap Waveguide Wideband Hybrid Directional Coupler for Ka-Band Applications
(IEEE, 2020) Soliman, Mohamed Yasser; Ali, Mohamed Mamdouh M.; Shams, Shoukry, I; Sree, Mohamed Fathy Abo; Fawzy, Diaa E.; Allam, A. M. M. A.
The fifth generation (5G) is the next wireless mobile communication technology that targets to provide huge capacity, low latency and high data speeds. Like any new wireless technology, 5G requires the development of exciting techniques, where access to high frequency spectrum can achieve the desired characteristics. In addition, new systems must be developed and designed using wide bandwidth microwave components, which should be implemented with modern and efficient guiding structures. Among all the microwave components, directional coupler is essential device as it can be used to realize many subsystems such as beamforming networks. In order to keep up with the huge changes in future technologies, couplers still requires noticeable improvement, where wide bandwidth and low loss should be achieved throughout using modern guiding technology such as Ridge Gap Waveguide (RGW). In this paper, a design of ultra-wideband 3 dB quadrature hybrid directional coupler using RGW technology is introduced. The proposed coupler has a compact size of 1.58 lambda x 1.4 lambda and achieves a relative bandwidth of 44.7 % at 33.5 GHz, which cover the whole ka-band. In addition, a stable 90 degrees phase difference between the coupling and transmission coefficients is obtained over the whole frequency band.