A5037470376- Antenna Design and Analysis
- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Advanced DC-DC Converters
- Wireless Body Area Networks
- Energy Harvesting in Wireless Networks
- Ultra-Wideband Communications Technology
- Microwave Imaging and Scattering Analysis
- Multilevel Inverters and Converters
- Water-Energy-Food Nexus Studies
- Radio Frequency Integrated Circuit Design
- Quantum Dots Synthesis And Properties
- Advanced Power Amplifier Design
- Advanced Thermoelectric Materials and Devices
- Gas Sensing Nanomaterials and Sensors
- Graphene research and applications
- Antenna Design and Optimization
- Advanced Combustion Engine Technologies
- solar cell performance optimization
- Biodiesel Production and Applications
- Thermochemical Biomass Conversion Processes
- Microgrid Control and Optimization
- Induction Heating and Inverter Technology
- Thermal properties of materials
- Chalcogenide Semiconductor Thin Films
Northern University
2018-2024
University of Engineering and Technology Peshawar
2013-2024
CECOS University
2013-2016
Institute of Space Technology
2009
Abstract This study presents a planar dual-band multiple-input multiple-output (MIMO) antenna design for the prospective fifth-generation (5G) frequency bands of 28 and 38 GHz. The element is designed by utilizing rectangular patch with an offset microstrip feeding technique. A response achieved placing semi-circular slots on each side element. To tune improve impedance matching, vertical slits are etched in ground plane, respectively. results show that single offers bandwidth 2.52 GHz...
Nanosatellites have opened up significant opportunities for small and medium enterprises academic institutions in space technology, driving demand compact, high‐performance antennas. This study presents a miniaturized, right‐handed circularly polarized (RHCP) V‐shaped patch array antenna, integrated with matched feeding network, tailored nanosatellite applications. The innovative design achieves compact 13 × cm 2 footprint while delivering high gain of 8.95 dBi, wide −3 dB beamwidth 55°, an...
Microwave medical imaging (MMI) is experiencing a surge in research interest, with antenna performance emerging as key area for improvement. This work addresses this need by enhancing the directivity of compact UWB using Yagi-Uda-inspired reflector antenna. The proposed reflector-loaded (RLA) exhibited significant gain and improvements compared to non-directional reference When analyzed MMI applications, RLA showed maximum increase 4 dBi realized 14.26 dB transmitted field strength within...
In modern communication systems, ultra-wideband (UWB) technology has garnered substantial attention due to its superior attributes compared traditional narrowband systems. Over the past decade, UWB also found applications in microwave-based imaging This study introduces a simple planar coplanar waveguide-fed circular shape arc slot antenna designed specifically for biomedicine and microwave medical applications. The proposed design is implemented on 1.6-mm-thick FR4 substrate with relative...
In this research, the use of directional UWB antennas for purpose lung tumour detection is investigated. A comparison performance and non-directional in presented through simulations it shown that using a antenna results clear tumor also allows to increase distance between patient perform test. The difference plots S parameters normal cancerous provides basis tumour. These findings can further pave way manufacturing friendly microwave medical imaging equipment future.
The switched mode dc-dc converters have been extensively analyzed for an appropriate method of modeling and analysis along with selection a suitable control technique improved stability. Various approaches are followed to develop analyze scheme the converters. Stability is primary goal in design any controller, which can be achieved by loop gain closed system. frequency domain performance measure parameters provide inside view about stability dynamic behavior converter. It judged margin...
The switched mode dc-dc converters are some of the most widely used power electronics circuits because high conversion efficiency and flexible output voltage. Many methods have been developed for control converters. This paper deals with design controller buck converter using various techniques. first two techniques based on classical or linear i.e. PI PID control, while other technique non method Sliding Mode Control (SMC) Proportional Integral Derivative (SMC-PID). voltage inductor current...
High directivity antennas are often used in communication systems to meet specific coverage requirements. This paper presents a unidirectional, high gain UWB antenna. A reference antenna is considered and metallic cavity built around it, this arrangement along with stacked parasitic patch shows maximum increase of 8.5 dB the 8.43 seen for having band rejection feature.
This paper presents a parametric study of UWB antenna loaded with parasitic patches on the front and metal sheets as reflectors back side. A maximum increase 2.6dB in gain 10.4dBi was observed by increasing number but keeping their sizes fixed. Similarly varying size patches, increased 5dB. Finally reflector showed an 3.5dB gain. provides design guidelines for best configuration integrated reflectors.
High gain antennas are often used in communication systems to meet specific coverage requirements. This paper presents the enhancement technique for UWB antennas. Two reference considered and their has been increased by 2.4dB using parasitic patch stacked arrangement. The band notch antenna also shown show this increase pass band. Finally, reflector is added which further 5.91dB.
An attempt to reduce the size of printed patch antenna and arrays severely degrades performance, it results in increased side lobe level. Electromagnetic band gap (EBG) structure is used suppress levels utilized enhance such but significantly enlarges overall size. This paper proposes a modified EBG with wider compact The conventional mushroom geometry complex due presence many vias. proposed simple fabricate less patches Also substrate reduced by 89.24% even much better band-gap. Proposed...
Abstract Quest for alternate energy sources is the core of most research activities these days. No matter how small or large amount can be produced by utilizing non-conventional techniques and sources, every bit innovation reshape future energy. In this work, experimental analysis thermoelectric (TE) properties bulk-graphene in temperature range (303 to 363) K presented. Graphene powder was pressed form a pellet which used fabricate TE device. The effects on Seebeck coefficient, electrical...
Air pollution and energy crisis in the south Asian region have given thrust for development of renewables by setting new policies targets. Several factors like urbanization, industrialization, weak infrastructure contributed significantly to air this region. Unfortunately, quality major cities is worst, which makes living conditions those completely unlivable. Another problem shortage electricity due enormous difference between supply demands. Renewable can play an essential role improving...
This paper investigates a technique to design small size UWB antennas. The is named as Relative Size Reduction Technique (RSRT). has been applied three reference antennas, and it observed that maximum reduction of about 53% in the antenna achieved without significant deterioration radiation properties. It also shown this works equally well for band notched antenna. proposed suitable application future miniaturized devices.
The remarkable progress of power electronic converters (PEC) technology has led to their increased penetration in distributed energy systems (DES). Particularly, the direct current (dc) nanogrid-based DES embody a variety sources and loads, connected through central dc bus. Therefore, PECs are required be employed as an interface. It would facilitate incorporation renewable battery storage system into nanogrids. However, it is more challenging integration multiple modules may cause...