A5059058288- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
- Microwave Engineering and Waveguides
- Radio Frequency Integrated Circuit Design
- Intraocular Surgery and Lenses
- Wind and Air Flow Studies
- Retinal and Macular Surgery
- Urban Heat Island Mitigation
- Advanced Wireless Communication Technologies
- Building Energy and Comfort Optimization
- RFID technology advancements
- Computational Geometry and Mesh Generation
- Electromagnetic Compatibility and Measurements
- Robotic Path Planning Algorithms
- Surgical Simulation and Training
- Traffic control and management
German University in Cairo
2014-2023
The objective of the research is to improve space heating green buildings by examining experimentally influence medium mass flow rate on thermal performance. A building was built in Cairo, Egypt, that consists two similar rooms: one heated room and other a reference for comparison. photovoltaic (PV/T) collector used heat up water storage tank, hot tank circulated radiant floor examined building. varied between 0.04 0.08 kg/s. It found decreasing improves floor. percentage improvement...
To establish the level of confidence amongst UK ophthalmology specialist registrars (residents) in managing posterior capsule rupture (PCR) during cataract surgery.An online nine-item questionnaire was distributed to all registrars, recruited nationwide via regional representatives. Data collected included stage training, number completed operations, cumulative PCR rate, PCRs independently managed, understanding vitrectomy settings and fluidic parameters access simulation. Respondents...
Ultra-thin absorbers are studied theoretically in detail to provide an in-depth model for their absorption behaviour. In this work, the resonance of ultrathin rectangular patch absorber is analysed using both cavity and transmission line models. A single structure with grounded dielectric substrate has been used as explain analytical proposed. The analysis shows that act a lossy resonator which exhibits due dominance non-transverse electric field component launched on unit cell at resonance....
Antenna measurement is crucial for characterizing the performance of an antenna. This article proposes a technique that can be used demo purposes in class or laboratory ultrahigh frequency (UHF) antennas. approach measures antenna under test (AUT) semispherical pattern simultaneously without any mechanical rotation as commonly applied. The measured data are then processed using laptop connected to radio-frequency identification (RFID) reader (transceiver) identify various properties. setup...
In modern cities, intersections are vital pieces of road infrastructure, but they also have the potential to snarl traffic owing accidents or a lack coordination systems like signals. As eco-systems become more connected and autonomous, researchers been increasingly interested in concept autonomous intersection management (AIM). AIM improves flow by coordinating motion vehicles through intersections. This study proposes an system consisting two-layer hierarchal control architecture vehicle...
In this paper, a novel 180° coupler is proposed. The proposed hybrid uses the input port of an ultra wide band Wilkinson power divider as summation and replaces resistor by additional fourth having same characteristic impedance; will act difference port. design developed using microstrip line slot line, hence avoiding any complex structures. This configuration results in broadband frequency performance where return loss sum delta less than 10 dB for 80% bandwidth. Due to its symmetric...
This paper investigates a new approach to minimize dependency of absorbance on the angle incidence (thetas) and polarization (φ) for frequency selective surfaces (FSS) absorbers based previous theoretical analysis single rectangular circular patch antennas. It is shown how when antenna treated as unit cell in FSS absorber its performance preserves key features. The pattern incident TE TM polarized radiation comparable power H-plane E-plane respectively. Based this concept an hollow...
This work presents two different novel groundless absorber based sensor design to be integrated in a single mode waveguide. metamaterial is used high resolution measurements of variations the permittivity dielectric material where constant can detected by considering shift resonant frequency. The analyzed terms transmission, reflection and absorbance parameters. first configuration proposed gives transmission below -15 dB at frequency 11.5 GHz which concludes an absorption 97%. As for second...
Abstract Single‐layer ultrathin absorber patch elements are analysed under normal and oblique incidence. A compensation technique for impedance variation with an angle of incidence ( θ ) is proposed. An equivalent‐circuit model formulated that provides a realisation the absorption response (in terms resonance frequency ratio) non‐complicated rectangular absorbers using simple equations. The design methodology proposed based on multiple subcells patches to add another degree freedom equations...