Browsing by Author "Abo, Sree, M.F."

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Citation - Scopus: 1
Beamforming Network for 5g Applications
(Institute of Electrical and Electronics Engineers Inc., 2023) Raafat, M.A.; Allam, A.M.M.A.; Helala, M.A.; Ghanem, M.G.; Fawzy, Diaa E.; Abbas, M.A.; Abo, Sree, M.F.
This paper is devoted to the design, analysis, and implementation of switched beamforming network operating at 5.2 GHz for 5G applications. It is intended to launch four beams. The Butler matrix feeding network is presented to electronically switch the beam in the desired direction. This work achieves a good approach to alleviate the problem of cross-over implementation and fabrication. A Four-element array of printed antennas is designed and fabricated. The network and array are implemented on Rogers RT/duroid 5880 substrate with a relative permittivity of 2.2 and a thickness of 1.04 mm. The different scattering parameters are simulated using both ADS and CST which conduct good agreement between the simulated and measured results. © 2023 IEEE.
Citation - Scopus: 3
Design and Implementation of Smart Watch Textile Antenna for Wi-Fi Bio Medical Applications in Millimetric Wave Band
(Institute of Electrical and Electronics Engineers Inc., 2023) Allam, A.M.M.A.; Ghanem, M.G.; Fawzy, Diaa E.; Raafat, M.A.; Abbas, M.A.; Abo, Sree, M.F.; El-Din, M.S.H.S.
This paper is devoted to the design and implementation of smart watch textile antenna for Wi-Fi bio-medical applications in millimetric wave bands. The antenna is implemented on the leather textile-based substrate to be embedded in a smart watch. It enables the watch to pick up Wi-Fi signals without the need to be connected to a mobile through Bluetooth. It operates at 60 GHz or WiGig (Wireless Gigabit Alliance) band with a wide band for higher-rate applications. It also could be implemented over many stratified layers of the body organisms to be used in the diagnosis of many diseases like diabetes and cancer. The structure is designed and simulated using CST (Studio Suite) program. The wearable patch antenna has an octagon shape and it is implemented on leather material that acted as a flexible substrate with a size of 5.632 x 6.4 x 2 mm 3, relative permittivity of 2.95, and loss tangent of 0.006. The feeding is carried out using differential feed (discrete port in CST). This work provides five antenna implementations; antenna without ground, a ground is added at the back of the antenna in order to increase the antenna gain, the substrate dimensions are increased to 15 x 30 mm2 to resemble the real hand watch size, layers of skin and fat are added under the ground of the antenna to study the effect of human body tissues human on the antenna performance. Finally, the whole structure is bent. It is found that the antenna can achieve a simulated peak realized gain in dB of 5.68, 7.28, 6.15, 3.03, and 4.37 for antenna without ground, antenna with the ground, antenna with larger substrate dimensions, antenna with skin and fat, and bent structure, respectively. The antenna with ground exhibits high gain, while adding the human organisms absorption, the gain is degraded because of human absorption. The bent structure contributes to higher gain. © 2023 IEEE.
Citation - Scopus: 1
Re-Configurable Power Divider Based on Printed Ridge Gap Waveguide Technology
(Institute of Electrical and Electronics Engineers Inc., 2023) Ali, M.M.M.; Shams, S.I.; Elsaadany, M.; Fawzy, Diaa E.; Allam, A.M.M.A.; Abbas, M.A.; Abo, Sree, M.F.
Future Millimeter Wave (mmWave) band communication systems are predicted to be involved in different and diverse fields. These systems will be smart with high speed that enable the emergence of fundamental and advanced services. In order to realize these systems we need the use of reconfigurable microwave components implemented based on modern guiding structures. Power dividers are considered one of the essential components for the feeding antenna system. In this paper, Re-configurable Printed Ridge Gap Waveguide (RPRGW) is deployed to implement a power divider. The simulated results show a wide bandwidth of 16 % at 38.5 GHz. These results demonstrate the merit of using this technology to implement various microwave components suitable for smart communication systems. © 2023 IEEE.