ORCID Profile
0000-0002-7561-9903
Current Organisations
Libyan Center for Remote Sensing and Space Science
,
University of Wollongong
,
Western Sydney University
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Publications
Killing G(+) or G(−) Bacteria? The Important Role of Molecular Charge in AIE‐Active Photosensitizers
Publisher: Wiley
Date: 06-04-2020
Efficient Killing of Multidrug‐Resistant Internalized Bacteria by AIEgens In Vivo
Publisher: Wiley
Date: 02-03-2021
Abstract: Bacteria infected cells acting as “Trojan horses” not only protect bacteria from antibiotic therapies and immune clearance, but also increase the dissemination of pathogens from the initial sites of infection. Antibiotics are hard and insufficient to treat such hidden internalized bacteria, especially multidrug‐resistant (MDR) bacteria. Herein, aggregation‐induced emission luminogens (AIEgens) such as N , N ‐diphenyl‐4‐(7‐(pyridin‐4‐yl) benzo [ c ] [1,2,5] thiadiazol‐4‐yl) aniline functionalized with 1‐bromoethane (TBP‐1) and (3‐bromopropyl) trimethylammonium bromide (TBP‐2) (TBPs) show potent broad‐spectrum bactericidal activity against both extracellular and internalized Gram‐positive pathogens. TBPs trigger reactive oxygen species (ROS)‐mediated membrane damage to kill bacteria, regardless of light irradiation. TBPs effectively kill bacteria without the development of resistance. Additionally, such AIEgens activate mitochondria dependent autophagy to eliminate internalized bacteria in host cells. Compared to the routinely used vancomycin in clinic, TBPs demonstrate comparable efficacy against methicillin‐resistant Staphylococcus aureus (MRSA) in vivo. The studies suggest that AIEgens are promising new agents for the treatment of MDR bacteria associated infections.
High Gain Miniaturized MPA with MSS for FemtoSat Communications
Publisher: Springer Singapore
Date: 2019
Mixed mode teaching: case study in mixed mode delivery of hardware-based undergraduate engineering laboratories during COVID-19 pandemic
Publisher: Informa UK Limited
Date: 12-04-2023
E-Shaped H-Slotted Dual Band mmWave Antenna for 5G Technology
Publisher: MDPI AG
Date: 25-04-2021
DOI: 10.3390/ELECTRONICS10091019
Abstract: The aim of this work is to propose a dual band millimeter wave (mmwave) MIMO antenna system for 5G technology. In addition, the arrangement of the antenna elements in an array should be in such a manner that without using the traditional decoupling structures and/or techniques, a reasonable isolation level must be achieved. To demonstrate this, a system consists of four radiating elements that are etched on a 0.508 mm-thick Rogers-5880 substrate. The dielectric constant of the substrate is 2.2 and the loss tangent is 0.0009. Each radiating element consists of three parts an E-shaped patch, an H-shaped slot within a patch, and a transmission line. The system is resonating at two different mmwave frequencies, i.e., 28 GHz and 38 GHz with a minimum port isolation of 28 dB. The mean measured gain is found to be at 7.1 dBi at 28 GHz and 7.9 dBi at 38 GHz with average efficiency, and envelope correlation coefficient (ECC) of the system at 70%, and 0.0005 respectively. The proposed system is designed and simulated in a full-wave electromagnetic wave software Computer Simulation Technology (CST), fabricated using LPKF D104 milling machine, and measured using R& SZNA67 vector network analyzer. An excellent agreement is observed between the simulated and the measured results and a detailed comparison with the previous works is also presented. Due to attributes such as low-cost, easy to fabricate, and dual-band, it is believed that this system will find its application for future 5G systems.
A Wideband Metal-Only Patch Antenna for CubeSat
Publisher: MDPI AG
Date: 30-12-2020
DOI: 10.3390/ELECTRONICS10010050
Abstract: This article presents a compact wideband high gain patch antenna for CubeSat. The proposed metal-only antenna mainly consists of an upper patch, a folded r -shaped patch and shoring pins connecting the antenna with the ground plane. By adjusting the lengths and widths of two arms of the upper F-shaped patch, a second resonant frequency is generated, and hence, the −10 dB bandwidth is increased. Moreover, the effect of arms’ lengths and widths on reflection coefficients, operating frequency and bandwidth is presented. To validate the design and the simulation results, a prototype metal-only patch antenna was fabricated and tested in a Chamber. A good agreement between the simulated and measured results is achieved. The measured results show that the fabricated prototype achieves a −10 dB bandwidth of 44.9% (1.6–2.7 GHz), a small reflection coefficient of −24.4 dB and a high efficiency, i.e., 85% at 2.45 GHz. The radiation performance of the proposed antenna is measured, showing a peak realized gain of 8.5 dBi with cross polarization level less than −20 dB at 2.45 GHz and a 3 dB gain bandwidth of 61.22%.
A Survey on CubeSat Missions and Their Antenna Designs
Publisher: MDPI AG
Date: 27-06-2022
DOI: 10.3390/ELECTRONICS11132021
Abstract: CubeSats are a class of miniaturized satellites that have become increasingly popular in academia and among hobbyists due to their short development time and low fabrication cost. Their compact size, lightweight characteristics, and ability to form a swarm enables them to communicate directly with one another to inspire new ideas on space exploration, space-based measurements, and implementation of the latest technology. CubeSat missions require specific antenna designs in order to achieve optimal performance and ensure mission success. Over the past two decades, a plethora of antenna designs have been proposed and implemented on CubeSat missions. Several challenges arise when designing CubeSat antennas such as gain, polarization, frequency selection, pointing accuracy, coverage, and deployment mechanisms. While these challenges are strongly related to the restrictions posed by the CubeSat standards, recently, researchers have turned their attention from the reliable and proven whip antenna to more sophisticated antenna designs such as antenna arrays to allow for higher gain and reconfigurable and steerable radiation patterns. This paper provides a comprehensive survey of the antennas used in 120 CubeSat missions from 2003 to 2022 as well as a collection of single-element antennas and antenna arrays that have been proposed in the literature. In addition, we propose a pictorial representation of how to select an antenna for different types of CubeSat missions. To this end, this paper aims is to serve both as an introductory guide on CubeSats antennas for CubeSat enthusiasts and a state of the art for CubeSat designers in this ever-growing field.
Telemetry, tracking and command subsystem for LibyaSat-1
Publisher: IEEE
Date: 11-2015
S-Band CPW-Fed Slot Antenna with 2D Metamaterials for CubeSat Communications
Publisher: Springer Singapore
Date: 2019
An aggregation-induced emission platform for efficient Golgi apparatus and endoplasmic reticulum specific imaging
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1SC03932F
Abstract: As two important subcellular organelles in eukaryotic cells, the Golgi apparatus (GA) and endoplasmic reticulum (ER) have recently captivated much interest due to their considerable importance in many biofunctions and role as critical biomarkers for various diseases.
The design requirements for Libyan imaging mini-satellite (LibyaSat-1)
Publisher: IEEE
Date: 11-2015
Breathing and Heartrate Monitoring System using IR-UWB Radar
Publisher: IEEE
Date: 12-2019
UHF-RFID Reader using a Metasurface CPW-Fed Slot Antenna
Publisher: IEEE
Date: 14-12-2020
Dual Band Slot Antenna with F-Shaped Slits for C-band and X-band Applications
Publisher: IEEE
Date: 12-2019
Printed Yagi-Uda antenna array on CubeSat
Publisher: IEEE
Date: 12-2017
Novel Bow-Tie Chip-less RFID Tag for Wearable Applications
Publisher: IEEE
Date: 09-2019
Developing Cost-Effective and High-Speed 40 Gbps FSO Systems Incorporating Wavelength and Spatial Diversity Techniques
Publisher: Frontiers Media SA
Date: 27-08-2021
Abstract: Free-space optical (FSO) communication systems are being anticipated to offer promising alternatives to existing radio networks in delivering high-speed data access to end-users. Ease of installation, robust features, and cost-effective operation have been the hallmark of FSO systems, and these features will play an obvious role in deciding the ways in which futuristic smart communication models will operate. Despite these arrays of features, FSO links suffer severe performance degradation due to channel-induced impairments caused by atmospheric effects such as rain, haze, and fog. In this work, we have investigated and compared the performance of 40 Gbps FSO links for different channel conditions ranging from clear weather to severe attenuation by incorporating spatial and wavelength ersity as performance booster techniques. The use of an erbium-doped fiber lifier (EDFA) with FSO links has also been proposed here. Using performance metrics like bit error rate (BER) and eye patterns, it has been found that the use of EDFA not only helps in compensating for the link losses but also aids in realizing an all-optical processing based last-mile access system. The proposed FSO system will be capable of bridging the existing backbone fiber networks with end-users with minimal changes to the existing hardware regime, thereby proving to be extremely cost-effective in sharp contrast to radio-frequency generations which require major infrastructure overhaul.
High Gain Slot Antenna with Reflector for 2U CubeSat
Publisher: IEEE
Date: 12-2018
Molecular Engineering of High-Performance Aggregation-Induced Emission Photosensitizers to Boost Cancer Theranostics Mediated by Acid-Triggered Nucleus-Targeted Nanovectors
Publisher: American Chemical Society (ACS)
Date: 02-06-2202
Thrombin generation in different commercial sodium citrate blood tubes
Publisher: Centre for Evaluation in Education and Science (CEON/CEES)
Date: 26-03-2019
Abstract: This study aimed to verify whether blood drawn into six different commercial coagulation tubes generated comparable results of thrombin generation. Blood was sequentially collected from 20 healthy subjects into different brand and draw volume 3.2% sodium citrate tubes (4.3 mL Sarstedt, 3.0 mL Greiner, 2.7 mL Becton Dickinson, 2.0 mL Kima, 1.8 mL Sarstedt and 1.0 mL Greiner). Thrombin generation was measured in plasma with the fully-automated ST Genesia analyzer using the weakest trigger (STG-BleedScreen). Different values of lag time (LT), time to reach thrombin peak (TP), thrombin peak height (PH) and endogenous thrombin potential (ETP) were commonly found in different tubes. Thrombin generation was the lowest in 4.3 mL Sarstedt tubes and the highest in 1.0 mL Greiner tubes. Other tubes displayed intermediate values. In multiple comparisons, LT was significantly different in 6/15 cases (40%), whilst PH, TP and ETP were significantly different in 14/15 (93%), 13/15 (87%) and 13/15 (87%) cases. The mean percent bias of LT, PH, TP and ETP ranged between -6% and +1%, -27% and +116%, -22% and +8%, and between -18% and +65%. The intra-assay imprecision of LT, PH, TP and ETP was exceeded in 0/15 (0%), 13/15 (87%), 6/15 (40%) and 13/15 (87%) comparisons. The correlation of LT, PH, TP and ETP values in different tubes ranged between 0.718–0.971, 0.570–0.966, 0.725–0.977 and 0.101–0.904. Blood collection for thrombin generation assays requires local standardization using identical tubes for brand and draw volume, and reference ranges calculated according to type of tubes.
De Novo Design of Reversibly pH-Switchable NIR-II Aggregation-Induced Emission Luminogens for Efficient Phototheranostics of Patient-Derived Tumor Xenografts
Publisher: American Chemical Society (ACS)
Date: 27-12-2022
DOI: 10.1021/JACS.2C10076
Antenna Designs for 5G/IoT and Space Applications
Publisher: MDPI AG
Date: 10-08-2022
DOI: 10.3390/ELECTRONICS11162484
Abstract: Antenna design has received renewed attention in the last few years [...]
Performance Improvement of MIMO-FBMC Systems Using Different Diversity Combining Schemes Through AWGN and Rayleigh Channels
Publisher: Springer Singapore
Date: 28-11-2018
Bending Analysis of Polymer-Based Flexible Antennas for Wearable, General IoT Applications: A Review
Publisher: MDPI AG
Date: 22-01-2021
Abstract: Flexible substrates have become essential in order to provide increased flexibility in wearable sensors, including polymers, plastic, paper, textiles and fabrics. This study is to comprehensively summarize the bending capabilities of flexible polymer substrate for general Internet of Things (IoTs) applications. The basic premise is to investigate the flexibility and bending ability of polymer materials as well as their tendency to withstand deformation. We start by providing a chronological order of flexible materials which have been used during the last few decades. In the future, the IoT is expected to support a erse set of technologies to enable new applications through wireless connectivity. For wearable IoTs, flexibility and bending capabilities of materials are required. This paper provides an overview of some abundantly used polymer substrates and compares their physical, electrical and mechanical properties. It also studies the bending effects on the radiation performance of antenna designs that use polymer substrates. Moreover, we explore a selection of flexible materials for flexible antennas in IoT applications, namely Polyimides (PI), Polyethylene Terephthalate (PET), Polydimethylsiloxane (PDMS), Polytetrafluoroethylene (PTFE), Rogers RT/Duroid and Liquid Crystal Polymer (LCP). The study includes a complete analysis of bending and folding effects on the radiation characteristics such as S-parameters, resonant frequency deviation and the impedance mismatch with feedline of the flexible polymer substrate microstrip antennas. These flexible polymer substrates are useful for future wearable devices and general IoT applications.
Novel DTN Mobility-Driven Routing in Autonomous Drone Logistics Networks
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Two-Pair Slots Inserted CP Patch Antenna for Wide Axial Ratio Beamwidth
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
A Printed Yagi Antenna for CubeSat with Multi-Frequency Tilt Operation
Publisher: MDPI AG
Date: 12-06-2020
DOI: 10.3390/ELECTRONICS9060986
Abstract: In this paper, a printed Yagi antenna with an integrated balun is proposed for CubeSat communications. The printed antenna is mechanically adjustable to realize three functional states at different operating frequencies in the L-band and S-band respectively. Three different angle deployments are proposed at 10°, 50° and 90°, so that the antenna operates at three different operating frequencies, namely 1.3 GHz (L-band), 2.4 GHz (S-band) and 3 GHz (S-band). The measured results of the fabricated antenna are well matched with the simulation, having frequencies of 2.82–3.07 GHz, 1.3–1.4 GHz and 2.38–2.57 GHz, with similar radiation patterns. The measured gain of the antenna is 8.167 dBi at 2.4 GHz, 5.278 dBi at 1.3 GHz and 6.120 dBi at 3 GHz. Keeping within the general theme of cheap off the shelf components for CubeSats, this antenna design allows the CubeSat designers to choose from three popular frequencies, through a simple angle configuration. The main contribution of this work lies with the reconfigurable frequency, relatively high gain and simplicity of design.
High Gain Patch Antenna Array with Parasitic Elements for CubeSat Applications
Publisher: IEEE
Date: 12-2018
The Impact of Bending on Radiation Characteristics of Polymer-Based Flexible Antennas for General IoT Applications
Publisher: MDPI AG
Date: 28-09-2021
DOI: 10.3390/APP11199044
Abstract: Flexible wearable wireless devices have found practical uses as their cost has fallen and Internet of Things applications have gained further acceptance. These devices are gaining further use and acceptance in the consumer and wearable space for applications such as logistical tracking and maintaining sensor information, including temperature, humidity, and location. In such applications, antennas are exposed to bending and crumbling. Therefore, flexible substrate antennas for use with polymer-based flexible devices are an important area of research that needs to be addressed. In this study, the bending capabilities of flexible polymer substrate antennas for general IoT applications were practically analyzed by fabricating flexible antennas on Polyethylene Terephthalate (PET), Polytetrafluoroethylene (PTFE) Teflon, and Polyvinylchloride (PVC) substrates operating at 2.45, 4.45, and 7.25 GHz frequencies. The basic premise was to investigate the flexibility and bending ability of polymer materials, and their tendency to withstand deformation. In the current paper, we start by providing an equivalent model for the flexible microstrip patch antenna under bent conditions, followed by outlining the process of designing flexible antennas on polymer substrates. Finally, the fabricated flexible antennas were tested in an anechoic chamber for various radiation characteristics such as reflection coefficients, operating frequency shifts, and impedance mismatch with the transmission line, under bending conditions up to 7 mm. The practical outcomes were then compared with our recent investigation on flexible polymer substrate antennas for wearable applications. This study provides a means to select a suitable polymer substrate for future wearable sensors and antennas with high bendability.
Wideband Reflectarrays for 5G/6G: A Survey
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
A Survey and Study of Planar Antennas for Pico-Satellites
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2015
Dipole antenna array cluster for CubeSats
Publisher: IEEE
Date: 12-2016
A low profile high gain CPW-fed slot antenna with a cavity backed reflector for CubeSats
Publisher: IEEE
Date: 12-2018
Analysis and Optimization of a Very Compact MPA with Parasitic Elements for Inter-swarm of CubeSats Communications
Publisher: No publisher found
Date: 2019
Low-Profile Patch Antenna with Parasitic Elements for CubeSat Applications
Publisher: Springer Singapore
Date: 2019
Performance Analysis of Receiver Diversity Incorporated WiMAX Systems
Publisher: Springer Singapore
Date: 28-11-2018
Antenna Designs for CubeSats: A Review
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
A Wideband 5G CubeSat Patch Antenna
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2022
S-band Steerable Yagi Antenna for CubeSats
Publisher: IEEE
Date: 12-2019
Biomimetic Nanoplatform Loading Type I Aggregation-Induced Emission Photosensitizer and Glutamine Blockade to Regulate Nutrient Partitioning for Enhancing Antitumor Immunotherapy
Publisher: American Chemical Society (ACS)
Date: 13-07-2022
Abstract: The intense metabolism of cancer cells leads to hypoxia and lack of crucial nutrients in the tumor microenvironment, which hinders the function of immune cells. We designed a biomimetic immune metabolic nanoplatform, in which a type I aggregation-induced emission photosensitizer and a glutamine antagonist are encapsulated into a cancer cell membrane for achieving specific delivery
Dual-Band Folded-End Dipole Antenna for Plastic CubeSats
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2020
Optimum design of a tri-band MPA with parasitic elements for CubeSat communications using Genetic Algorithm
Publisher: IEEE
Date: 10-2018
A high gain S-band slot antenna with MSS for CubeSat
Publisher: Springer Science and Business Media LLC
Date: 09-11-2019
In Situ Electrospinning of Aggregation‐Induced Emission Nanofibrous Dressing for Wound Healing
Publisher: Wiley
Date: 26-02-2022
Abstract: Rapid wound dressing and effective antibacterial therapy that meet the extreme requirements of emergency situations are urgently needed for treating skin wounds. Here, an in situ deposited and personalized nanofibrous dressing is reported which can be directly electrospun on skin wounds by a handheld electrospinning device and perfectly fits different wounds of various sizes. Moreover, an aggregation‐induced emission luminogen with photodynamic therapy effect is loaded in the nanofibrous dressings which endows the dressing's long‐term antibacterial activity during the wound healing process. The in situ electrospun nanofibers show excellent antimicrobial activity against Staphylococcus aureus ( S. aureus ) and methicillin‐resistant Staphylococcus aureus . In vivo studies demonstrate that these antibacterial nanofibrous dressings can effectively reduce inflammation and significantly accelerate wound healing. Such an in situ produced antibacterial dressing is promising as a total solution for treating emergencies, including patient‐specific clinical wounds and military injuries.
Designing an optimized free space optical (FSO) link for terrestrial commercial applications under turbulent channel conditions
Publisher: Springer Science and Business Media LLC
Date: 11-04-2023
S-band shorted patch antenna for inter pico satellite communications
Publisher: IEEE
Date: 10-2015
Performance analysis of OFDM system augmented with SC diversity combining technique in presence of CFO
Publisher: IEEE
Date: 10-2018
S-band planar antennas for a cubesat
Publisher: School of Electrical Engineering and Informatics (STEI) ITB
Date: 31-12-2015
A wideband F-shaped patch antenna for S-band CubeSats communications
Publisher: IEEE
Date: 12-2016
A wideband C-shaped patch antenna for LibyaSat-1
Publisher: IEEE
Date: 10-2017
Add the Finishing Touch: Molecular Engineering of Conjugated Small Molecule for High‐Performance AIE Luminogen in Multimodal Phototheranostics
Publisher: Wiley
Date: 03-08-2021
Abstract: Phototheranostics based on luminogens with aggregation‐induced emission (AIE) characteristics is captivating increasing research interest nowadays. However, AIE luminogens are inherently featured by inferior absorption coefficients (ε) resulting from the distorted molecular geometry. Besides, molecular innovation of long‐wavelength light‐excitable AIE luminogens with highly efficient phototheranostic outputs is an appealing yet significantly challenging task. Herein, on the basis of a fused‐ring electron acceptor–donator–acceptor (A–D–A) type molecule (IDT) with aggregation‐caused quenching (ACQ) properties, molecular engineering smoothly proceeds and successfully yields a novel AIE luminogen (IDT‐TPE) via simply modifying tetraphenylethene (TPE) moieties on the sides of IDT backbone. The AIE tendency endows IDT‐TPE nanoparticles with enhanced fluorescence brightness and far superior fluorescence imaging performance to IDT nanoparticles for mice tumors. Moreover, IDT‐TPE nanoparticles exhibit near‐infrared light‐excitable features with a high ε of 8.9 × 10 4 m −1 cm −1 , which is roughly an order of magnitude higher than that of most previously reported AIE luminogens. Combining with their reactive oxygen species generation capability and extremely high photothermal conversion efficiency (59.7%), IDT‐TPE nanoparticles actualize unprecedented performance in multimodal phototheranostics. This study thus brings useful insights into the development of versatile phototheranostic materials with great potential for practical cancer theranostics.
Software-Defined Radios for CubeSat Applications: A Brief Review and Methodology
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2021
BER analysis of GFDM system augmented with SC diversity combining scheme for diverse Pulse Shaping Filters
Publisher: IEEE
Date: 10-2018
A Sub-6 GHz MIMO Antenna Array for 5G Wireless Terminals
Publisher: MDPI AG
Date: 09-12-2021
DOI: 10.3390/ELECTRONICS10243062
Abstract: This paper presents a novel antenna with its array and MIMO configuration for the 5G sub-6 GHz applications. The proposed antenna element operates at the central frequency of 5.57 GHz dedicated for Sub-6 GHz 5G communication applications. The antenna element holds a circular-shaped radiating portion with an inner-circular slot, plus a rectangular slot at its right edge to make the proposed design resonate at the desired frequency band. The RT5880 substrate is used with a thickness of 0.787 mm, and the low-loss tangent of 0.0009. To achieve a desired gain of 12 dB, a four-element array configuration is adopted, which improved a bore side gain to 12.4 dB from 6.66 dB. Then, the two-port configuration is adopted such that the isolation achieved between them is more than −30 dB. The total efficiency of the proposed antenna array is observed to be more than 80% within the operating bandwidth. Moreover, the Specific Absorption Rate (SAR) analysis is also presented for the proposed MIMO configuration, obeying the standard value (i.e., W/kg for any 10 g of tissue). The measured results are in good agreement with the simulated results. All the simulations of the proposed design are performed in the CST MWS software.
Effects of Bending Bow-Tie Chipless RFID Tag for Different Polymer Substrates
Publisher: IEEE
Date: 12-2019
A Wideband circularly polarized CPW-fed printed monopole X-band antenna for CubeSat Applications
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Multi-Hop Relay Based Free Space Optical Communication Link for Delivering Medical Services in Remote Areas
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2020
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No related grants have been discovered for Faisel Tubbal.