Browsing by Author "Fawzy, Diaa E."

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Design and Implementation of an Antenna for Automotive Applications at 76.5 Ghz
(Institute of Electrical and Electronics Engineers Inc., 2024) Mohamed, M.S.A.; Esam, G.; Allam, A.M.M.A.; Alexan, W.; Gadelmavla, Diaa; Şahin, Osman Nuri; Fawzy, Diaa E.
This paper presents an antenna candidate for automotive cars and MIMO radar applications. It is implemented on Rogers RO4003C with a relative dielectric constant of 3.55 and a thickness of 0.203 mm. Linearly and circularly polarized versions of printed antennas are presented and operate at 76.5 GHz, which meets the characteristics of the required application. One of the antennas is selected and fabricated for validation. The results of the reflection coefficient fo und good agreement between the simulated and measured ones. Further antenna parameters like 3D and 2D radiation patterns, realized gain and axial ratio are illustrated. © 2024 IEEE.
Design and Implementation of CP Antennas for Automotive and Radar Applications at 76.5 GHz
(IEEE, 2025) Allam, A. M. M. A.; Mohamed, Moustafa S. A.; Ahmed, Basel; Alexan, Wassim; El-Damak, Dina; Fawzy, Diaa E.
This paper presents an antenna designed for autonomous vehicles and MIMO radar systems. MIMO radar enhances detection and resolution by using multiple antennas. The research covers the design and performance evaluation of MIMO radar antennas, aiming to advance radar technology. The antenna is made on Rogers RO4003C (dielectric constant 3.55, thickness 0.203 mm) and operates at 76.5 GHz with single and multiple circularly polarized configurations. One antenna was fabricated, showing a strong correlation between simulated and measured reflection coefficients. Key parameters like the 2D radiation pattern, realized gain, and axial ratio are discussed. Circularly polarized (CP) antennas are favored for their advantages: orientation independence, reduced multi-path fading, and compatibility with linear polarization systems. The gain of the four-element CP antenna at 76.5 GHz reaches 8.23 dB as an array, intended for future MIMO radar applications to enhance field of view and angle resolution.
Citation - Scopus: 1
Design and Implementation Rgw Based Uwb Antenna Array for D-Band Applications
(IEEE Computer Society, 2022) Cengiz M.F.; Allam A.M.M.A.; Fawzy D.E.; Ghanem M.G.; Helala M.A.; Fawzy, Diaa E.; Ghanem, M.G.; Allam, A.M.M.A.; Cengiz, Mehmet Faruk; Helala, Mahmoud.A.
This study presents a new 4×1 rectangular slot antenna array based on ridge gap waveguide (RGW) technology for the use of D-band applications. The operating frequency of the proposed array antenna is 140.9-157.7 GHz. The Finite Integration Time-Domain (FITD) method is used to optimize the design parameters. Four rectangular slots are placed side by side and the RGW feeding network is used to feed them with minimal dispersion. Quarter-wavelength transformers are used to match the source to the load composed of the antenna array and feeding network. The antenna overall efficiency is around 95%. The antenna array's maximum gain is about 10 dBi, compared to the single antenna's gain of roughly 7 dBi. © 2022 IEEE.
Citation - WoS: 15
Citation - Scopus: 31
Development of a High Gain Fss Reflector Backed Monopole Antenna Using Machine Learning for 5g Applications
(Electromagnetics Academy, 2021) Nakmouche M.F.; Allam A.M.M.A.; Fawzy D.E.; Lin D.-B.; Nakmouche, Mohammed Farouk; Fawzy, Diaa E.; Allam, Abdemegeed M. M. A.; Lin, Ding-Bing
—This work is devoted to the development of a high gain Frequency Selective Surface (FSS) reflector backed monopole antenna using Machine Learning (ML) techniques for 5G applications. It analyzes and solves the complexity of the determination of the optimum position of the FSS reflector and the ground dimension of the monopole in this composite antenna structure since there are no solid and standard formulations for the computation of these two parameters. ML modelling is involved in the development process for the sake of gain enhancement. It is applied to get the optimum position of the FSS reflector layer and the ground dimension of the monopole antenna. The proposed antenna structure is 50 mm × 50 mm, implemented on a Rogers 5880 substrate (thickness = 1.6 mm). Two different patch antenna structures, with and without FSS, are developed and considered in the current work. The antenna performance in terms of operating frequency, return loss, and gain is analysed using the finite element methods. The design is optimized for a targeting frequency band operating at 6 GHz (5.53 GHz to 6.36 GHz), which is suitable for 5G Sub-6 GHz applications. The obtained results show that the integration of the FSS layer below the antenna structure provides a simple and efficient method to obtain a low-profile and high-gain antenna. Finally, the proposed design is fabricated and measured, and a good agreement between the simulated and measured results is obtained. A comparison with similar studies in the literature is presented and shows that the current design is more compact in size, and the obtained radiation efficiency and gain are higher than other designs. © 2021, Electromagnetics Academy. All rights reserved.
Citation - WoS: 6
Citation - Scopus: 15
Development of a Wideband Substrate Integrated Waveguide Bandpass Filter Using H-Slotted Dgs
(Institute of Electrical and Electronics Engineers Inc., 2019) Nakmouche M.F.; Taher H.; Fawzy D.E.; Allam A.M.M.A.; Taher, Hany; Nakmouche, Mohammed Farouk; Fawzy, Diaa E.; Allam, A.M.M.A.
In the current work, a new Wideband Substrate Integrated Waveguide Bandpass Filter (SIW-BPF) is presented. The target is to allow vertical roaming between the X and Ku band applications. As a first step, we performed a parametric study of different etched slot geometries namely, H-Slotted, T-Slotted, and U-Slotted DGS in order to examine the effects of altering different geometrical parameters of the unit on its response. H-Slotted DGS shows the highest FBW with 82.89% on the average compared to other geometries. As a second step, the cell size and the numbers of the H-Slotted DGS were optimized with the use of finite element method with the following constraints taken into consideration: low cost fabrication, high Q-Factor, compact size and easy integration. One of the designs was chosen for fabrication to validate the designed circuit. The measured results show that our optimized filter achieves an insertion loss of 2.01 dB at 8.5 GHz, a return loss higher than 11 dB and fractional bandwidth of 90.87% for a single cell and a fractional bandwidth of 80.05% for multiple cells. The measured results are in good agreement with the simulated results. © 2019 IEEE.
Citation - WoS: 11
Citation - Scopus: 36
Development of H-Slotted Dgs Based Dual Band Antenna Using Ann for 5g Applications
(Institute of Electrical and Electronics Engineers Inc., 2021) Nakmouche M.F.; Allam A.M.M.A.; Fawzy D.E.; Bing Lin D.; Abo Sree M.F.; Bing Lin, Ding; Nakmouche, Mohammed Farouk; Fawzy, Diaa E.; Allam, A.M.M.A.; Abo Sree, Mohamed Fathy
The proposed work conducts a new approach for modeling a dual band monopole antenna design using DGS assisted by ANN. In the aim of efficient dual band antenna design with gain and optimal impedance matching, the Artificial Neural Networks technique (ANN) is used for the development process. This work presents a modeling for H-slotted Defected Ground Structure (DGS) based dual band antenna using ANN for 5G Sub-6 GHz applications. The designed antenna operates at 3.76 GHz and 6.1 GHz. The antenna gain is 2.18 dB and 2.75 dB at both frequencies, respectively. Firstly, a simulation is performed using CST EM simulator, then the predicted results in term of return losses and frequencies are fed into the ANN model. Secondly using a hybrid algorithm based on both feed-forward back-propagation and Levenberg-Marquart (LM) learning algorithm, the optimal position of the H-Slotted DGS in terms of 5G Sub-6 GHz band is extracted. Finally, the experimental validation is conducted and compared with the simulation results, a good agreement is obtained. © 2021 EurAAP.
Citation - WoS: 5
Citation - Scopus: 19
Dual Band Siw Patch Antenna Based on H-Slotted Dgs for Ku Band Application
(Institute of Electrical and Electronics Engineers Inc., 2020) Nakmouche M.F.; Fawzy D.E.; Allam A.M.M.A.; Taher H.; Sree M.F.A.; Taher, Hany; Sree, Mohamed Fathy Abo; Nakmouche, Mohammed Farouk; Fawzy, Diaa E.; Allam, A.M.M.A.
A dual band Substrate Integrated Waveguide; SIW microstrip patch antenna based on periodic H-Defected Ground Structure; H-DGS is designed for Ku band applications. SIW techniques provide low cost, small size and convenient integration with planer circuit. The proposed antenna structure is designed on a Roger 5058 substrate with a thickness of 1.6 mm, 2.2 of dielectric constant and tangent loss of 0.0009. The performance analysis of the proposed antennas is performed using finite element methods, and the simulation results show a gain and directivity of 7.03 dB and 7.38 dB respectively at 12.67 GHz center frequency and at 14.56 GHz a gain of 7.77 dB and directivity of 8.13 dB. The proposed antenna overall radiation efficiency is 95.25% and 95.60% at 12.67 GHz and 14.56 GHz, respectively. The obtained measurements show good agreement with the simulation results. The proposed antenna is compact, simple in structure, and can be used in a variety of applications in the Ku band. © 2020 IEEE.
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.; Fawzy, Diaa E.; Allam, Abdelmegid; Elsaadany, Mahmoud; Shams, Shoukry I.; Emara, Mazen F.
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.; Fawzy, Diaa E.; Gagnon, Ghyslain; Allam, A.M.M.A.; Sebak, Abdelrazik; Elsaadany, Mahmoud; Shams, Shoukry I.; Ali, Mohamed Mamdouh M.
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: 1
Low-Cost Aip Array Design Using Machine Learning for Mmwave Mobile Systems
(Institute of Electrical and Electronics Engineers Inc., 2021) Nakmouche M.F.; Idrees Magray M.; Allam A.M.M.A.; Fawzy D.E.; Lin D.B.; Tarng J.-H.; Fawzy, Diaa E.; Nakmouche, Mohammed Farouk; Allam, A.M.M.A.; Lin, Ding Bing; Idrees Magray, M.; Tarng, Jenn-Hwan
Based on low-cost PCB solution, an array antenna in packaging (AiP) dedicated for mmWave mobile systems is designed using machine learning. The proposed antenna operates at 28 GHz (26.5 - 29.5 GHz) with a gain ranging from 8 dB to 15 dB in the operating bandwidth. The development process of the proposed AiP is assisted by machine learning for prediction of the optimal radiating patch's length and width in terms of resonance frequency. © 2021 Taiwan Microwave Association.
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.; Fawzy, Diaa E.; Allam, A.M.M.A.; Gagnon, Ghyslain; Derbal, Mohammed Cherif; Nedil, Mourad; Nakmouche, Mohammed Farouk; Shams, Shoukry I.
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.
Citation - Scopus: 7
A Novel Dual-Band Printed Siw Antenna Design Based on Fishnet & Ccrr Dgs Using Machine Learning for Ku-Band Applications
(Electromagnetics Academy, 2021) Nakmouche M.F.; Magray M.I.; Allam A.M.; Fawzy D.E.; Lin D.B.; Tarng J.-H.; Fawzy, Diaa E.; Nakmouche, Mohammed F.; Magray, Muhammad I.; Allam, Abdemegeed M.; Lin, Ding Bing; Tarng, Jenn-Hwen
—This paper analyzes and solves the complexity to determine the optimum positions of the Fishnet & Complementary Circular Ring Resonator (CCRR) based Defected Ground Structures (DGS) for Substrate Integrated Waveguide (SIW) based antennas. A new state-of-art technique based on Artificial Neural Network (ANN)-Machine Learning (ML) is proposed for overcoming the lack of solid and standard formulations for the computation of this parameter related to a targeted frequency. As a proof of concept and to test the performance of our approach, the algorithm is applied for the determination of the CCRR and Fishnet-DGS’s optimal positions for a SIW based antenna. The SIW technique provides the advantages of low cost, small size, and convenient integration with planar circuits. The ANN-ML based technique is optimized to attain dual-band resonances with optimal gain and radiation efficiency. The simulation results of the first Fishnet-DGS based antenna show good minimum return losses at two center frequencies, namely, 16.6 GHz (with gain of 6 dB and radiation efficiency of 95%) and 17.7 GHz (with gain and radiation efficiency of 9 dB and 96%, respectively). The second CCRR-DGS based antenna shows about 8 dB gain and a radiation efficiency of 87% at 17.3 GHz, and gain and efficiency of about 8.5 dB and 85% are observed at 17.8 GHz. The proposed CCRR and Fishnet-DGS based antenna are low profiles, low costs, with good gains and radiation efficiencies, making both designs very suitable for Ku-band applications. There is a fair agreement between the measured and simulated results. The achieved dual-band resonances act as a proof of concept that the proposed ANN-ML techniques can be employed for the determination of the optimal positions for CCRR and Fishnet thereby attaining any target dual-bands in the Ku-band with good accuracy of about 98% and a save of 99% in the overall the computational time. © 2021, Electromagnetics Academy. All rights reserved.
Citation - Scopus: 4
A Novel Ultra-Wideband Metamaterial-Based Perfect Absorber for 5g Millimeter-Wave Applications
(Institute of Electrical and Electronics Engineers Inc., 2022) Akarsu G.; Nakmouche M.F.; Fawzy D.E.; Allam A.M.M.A.; Akarsu, Gokberk; Nakmouche, Mohammed Farouk; Fawzy, Diaa E.; Allam, A.M.M.A.
This paper proposes a novel design of an ultra-thin, miniature metamaterial (MM)-based ultra-wideband absorber. The unit cell is designed by combining two letters (H & S) and side patches for the generation of multi-resonance bands, and printed on a grounded dielectric of Rogers RT5880 material. Based on the numerical plane-wave simulations, the proposed absorber exhibits an ultra-wideband of about 16.2 GHz absorption bandwidth in the frequency range between 27.669 GHz and 43.871 GHz. The average absorptivity rates are close to 99% for incident angles between 0°-20°. The developed absorber preserves the ultra-wideband property of about 11.50 GHz for incident angles between 20° and 30° in the frequency range between 27.7 GHz and 39.2 GHz with average absorptivity rates close to 90%. This design is very suitable for 5G millimeter-waves and Ka-band applications. © 2022 IEEE.
On the Design of Reconfigurable Wideband Ridge Gap Waveguide Amplifier Modules
(Institute of Electrical and Electronics Engineers Inc., 2020) Fawzy, Diaa E.; Gagnon, Ghyslain; Allam, A.M.M.A.; Elsaadany, Mahmoud; Sebak, Abdelrazik; Shams, Shoukry I.; Ali, Mohamed Mamdouh M.
Optimizing Ridge Gap Waveguide Based Slot Antenna Shape for Maximum Gain and Bandwidth for Satellite Applications
(Institute of Electrical and Electronics Engineers Inc., 2022) Akarsu, Gokberk; Fawzy, Diaa E.; Allam, A.M.M.A.; Cengiz, Mehmet Faruk