Arokiaswami Alphones
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View article: A 54 µW, 0.03 mm2 Event-Driven Charge-Sensitive DAQ Chip with Comparator-Gated Dynamic Acquisition in 65 nm CMOS
A 54 µW, 0.03 mm2 Event-Driven Charge-Sensitive DAQ Chip with Comparator-Gated Dynamic Acquisition in 65 nm CMOS Open
This paper presents a low-power data acquisition (DAQ) chip tailored for impulsive charge sensing, featuring a comparator-gated dynamic acquisition (CG-DAQ) architecture. A dynamic comparator triggers both the gain stage and a 12-bit succe…
View article: Topological Berry Antenna on a Silicon Chip for Terahertz Wireless Communication
Topological Berry Antenna on a Silicon Chip for Terahertz Wireless Communication Open
Nonzero Berry curvature is central to the existence of topological edge states in electronic and photonic valley‐Hall systems. While manipulating the Berry curvature in condensed matter systems is challenging, valley‐Hall topological photo…
View article: ICON3E- Electromagnetic Field (EMF) Effects on Human Body Based on ICNIRP Guideline in Railway Environments
ICON3E- Electromagnetic Field (EMF) Effects on Human Body Based on ICNIRP Guideline in Railway Environments Open
Growing of new railway infrastructure in Malaysia poses challenges in terms of electromagnetic field (EMF) interferences. This radiation comes across wired and wireless transmitters/receivers, electrical/electronic devices, and systems. El…
View article: Enhancement of Spurious Signal Suppression in Microstrip Mixers by Load Resistor Termination
Enhancement of Spurious Signal Suppression in Microstrip Mixers by Load Resistor Termination Open
The mixer is an essential component in RF transceiver subsystems. It has a role in shifting the signal frequency for more convenient processing of up-conversion as well as down-conversion. Despite generating the desired signal, the mixer a…
View article: Millimeter Wave Dual Polarized Huygens Lens of 0.14 λ₀Thickness
Millimeter Wave Dual Polarized Huygens Lens of 0.14 λ₀Thickness Open
A new dual polarized Huygens unit cell of thickness with two metal layers at W-band frequency range is designed, simulated and experimentally tested. The proposed unit cell has an electric dipole and a magnetic dipole for both horizontal a…
View article: Simulation and Experimental Validation of Optical Camera Communication
Simulation and Experimental Validation of Optical Camera Communication Open
While simulation tools for visible light communication (VLC) with photo detectors (PDs) have been widely investigated, similar tools for optical camera communication (OCC) with complementary metal oxide semiconductor (CMOS) sensors are lac…
View article: DumbLoc: Dumb Indoor Localization Framework Using Wi-Fi Fingerprinting
DumbLoc: Dumb Indoor Localization Framework Using Wi-Fi Fingerprinting Open
Extant indoor positioning techniques based on received signal strength (RSS) fingerprinting have achieved accurate positioning results. They leverage existing open-source datasets for training and comparing their model performance. However…
View article: High-efficiency electromagnetic energy harvesting using double-elliptical metasurface resonators
High-efficiency electromagnetic energy harvesting using double-elliptical metasurface resonators Open
This study introduces a metasurface (MS) based electrically small resonator for ambient electromagnetic (EM) energy harvesting. It is an array of novel resonators comprising double-elliptical cylinders. The harvester’s input impedance is d…
View article: Valley-conserved topological integrated antenna for 100-Gbps THz 6G wireless
Valley-conserved topological integrated antenna for 100-Gbps THz 6G wireless Open
The topological phase revolutionized wave transport, enabling integrated photonic interconnects with sharp light bending on a chip. However, the persistent challenge of momentum mismatch during intermedium topological mode transitions due …
View article: Tree based Single LED Indoor Visible Light Positioning Technique
Tree based Single LED Indoor Visible Light Positioning Technique Open
Visible light positioning(VLP) has gained prominence as a highly accurate indoor positioning technique. Few techniques consider the practical limitations of implementing VLP systems for indoor positioning. These limitations range from havi…
View article: mmWave Zero Order Resonant Antenna with Patch-Like Radiation Fed by a Butler Matrix for Passive Beamforming
mmWave Zero Order Resonant Antenna with Patch-Like Radiation Fed by a Butler Matrix for Passive Beamforming Open
A small zero-order resonant antenna based on the composite right-left-handed (CRLH) principle is designed and fabricated without metallic vias at 30 GHz to have patch-like radiation. The mirror images of two CRLH structures are connected t…
View article: Dual-Band, Wide-Angle, and High-Capture Efficiency Metasurface for Electromagnetic Energy Harvesting
Dual-Band, Wide-Angle, and High-Capture Efficiency Metasurface for Electromagnetic Energy Harvesting Open
A dual-band metasurface (MS) with a wide reception angle operating at Wi-Fi bands (2.4 GHz and 5.4 GHz) is presented for electromagnetic (EM) energy harvesting applications. The MS unit cell comprises a subwavelength circular split ring re…
View article: Wideband Matching Circuit for mmWave Series Fed Patch Array Antenna
Wideband Matching Circuit for mmWave Series Fed Patch Array Antenna Open
A novel wide band matching circuit for the series fed patch array antenna at 80 GHz is proposed in this paper. The series fed patch array is designed with amplitude tapered configuration. First, the series fed patch array is matched using …
View article: Recent Progress in Visible Light Positioning and Communication Systems
Recent Progress in Visible Light Positioning and Communication Systems Open
In this paper, we report the recent progress in visible light positioning and communication systems using light-emitting diodes (LEDs). Due to the wide deployment of LEDs for indoor illumination, visible light positioning (VLP) and visible…
View article: mm-Wave Radar-Based Vital Signs Monitoring and Arrhythmia Detection Using Machine Learning
mm-Wave Radar-Based Vital Signs Monitoring and Arrhythmia Detection Using Machine Learning Open
A non-contact, non-invasive monitoring system to measure and estimate the heart and breathing rate of humans using a frequency-modulated continuous wave (FMCW) mm-wave radar at 77 GHz is presented. A novel diagnostic system is proposed whi…
View article: Miniaturization of Phase-Difference-of-Arrival Based Visible Light Positioning Receiver Using Field Programmable Gate Arrays
Miniaturization of Phase-Difference-of-Arrival Based Visible Light Positioning Receiver Using Field Programmable Gate Arrays Open
Visible light positioning (VLP), phase-difference-of-arrival (PDOA), Field programmable gate arrays (FPGA), visible light communication (VLC)Miniaturization of indoor visible light positioning (VLP) receiver plays a key role in advancing V…
View article: Space Efficient Meta-Grid Lines for Mutual Coupling Reduction in Two-Port Planar Monopole and DRA Array
Space Efficient Meta-Grid Lines for Mutual Coupling Reduction in Two-Port Planar Monopole and DRA Array Open
Traditionally used mutual coupling (MC) reduction techniques such as electromagnetic bandgap structures, isolators and neutralization lines require extra space between radiators. Besides, metamaterial-based techniques require multi-layer a…
View article: DFT-spread OFDM with quadrature index modulation for practical VLC systems
DFT-spread OFDM with quadrature index modulation for practical VLC systems Open
In this paper, we for the first time propose and investigate a novel discrete Fourier transform-spread-orthogonal frequency division multiplexing with quadrature index modulation (DFT-S-OFDM-QIM) scheme for practical visible light communic…
View article: Enhancing the piezoelectric modulus of wurtzite AlN by ion beam strain engineering
Enhancing the piezoelectric modulus of wurtzite AlN by ion beam strain engineering Open
The piezoelectric modulus of wurtzite aluminum nitride (AlN) is a critical material parameter for electrical components, ultimately contributing to the energy efficiency and achievable bandwidth of modern communication devices. Here, we de…
View article: Triple‐band antenna using double periodic CRLH resonator on coplanar waveguide
Triple‐band antenna using double periodic CRLH resonator on coplanar waveguide Open
The uniplanar implementation of double periodic composite right/left‐handed (DPCRLH) symmetric unit cell is realized using coplanar waveguide and its analysis with parameter extraction are studied. DPCRLH symmetric unit cell is then experi…
View article: OFDM-Based Generalized Optical MIMO
OFDM-Based Generalized Optical MIMO Open
The combination of multiple-input multiple-output (MIMO) transmission and orthogonal frequency division multiplexing (OFDM) modulation has been shown to be an effective way to substantially enhance the capacity of bandlimited optical wirel…
View article: OFDM-Based Generalized Optical MIMO
OFDM-Based Generalized Optical MIMO Open
The combination of multiple-input multiple-output (MIMO) transmission and orthogonal frequency division multiplexing (OFDM) modulation has been shown to be an effective way to substantially enhance the capacity of bandlimited optical wirel…
View article: Artificial-Intelligence-Enabled Intelligent 6G Networks
Artificial-Intelligence-Enabled Intelligent 6G Networks Open
With the rapid development of smart terminals and infrastructures, as well as\ndiversified applications (e.g., virtual and augmented reality, remote surgery\nand holographic projection) with colorful requirements, current networks (e.g.,\n…
View article: Table of Contents
Table of Contents Open
View article: Coordinated Resource Allocation-Based Integrated Visible Light Communication and Positioning Systems for Indoor IoT
Coordinated Resource Allocation-Based Integrated Visible Light Communication and Positioning Systems for Indoor IoT Open
With the rapid development of Internet of Things (IoT) in the smart city, smart grid and smart industry, indoor communication and positioning are important fields of applications for indoor IoT. This paper presents an integrated visible li…
View article: Integration of Visible Light Communication and Positioning within 5G Networks for Internet of Things
Integration of Visible Light Communication and Positioning within 5G Networks for Internet of Things Open
With the widespread deployment of Internet of Things (IoT), more and more devices are involved in wireless networks, and the fifth generation (5G) network requires to support the massive connectivity and diverse services for the huge numbe…
View article: Deep-Reinforcement-Learning-Based Energy-Efficient Resource Management for Social and Cognitive Internet of Things
Deep-Reinforcement-Learning-Based Energy-Efficient Resource Management for Social and Cognitive Internet of Things Open
Internet of things (IoT) has attracted much interest due to its wide applications such as smart city, manufacturing, transportation, and healthcare. Social and cognitive IoT is capable of exploiting the social networking characteristics to…
View article: A Comprehensive Review of Metasurface Structures Suitable for RF Energy Harvesting
A Comprehensive Review of Metasurface Structures Suitable for RF Energy Harvesting Open
Energy harvesting (EH) or scavenging is recognized as harvesting energy from ambient energy sources in the surrounding environment. This paper reports a literature review on radio frequency (RF) EH using different metasurface/metamaterial …
View article: Outage Bridging and Trajectory Recovery in Visible Light Positioning Using Insufficient RSS Information
Outage Bridging and Trajectory Recovery in Visible Light Positioning Using Insufficient RSS Information Open
Indoor positioning technology is vital for various location-aware applications while visible light positioning (VLP) is especially promising due to its ubiquitous and energy-efficient features. VLP has been widely investigated under the as…
View article: QoS-Driven Optimized Design-Based Integrated Visible Light Communication and Positioning for Indoor IoT Networks
QoS-Driven Optimized Design-Based Integrated Visible Light Communication and Positioning for Indoor IoT Networks Open
With the rapid development of the Internet of Things (IoT) in the smart city, smart grid, and smart industry, indoor communication and positioning are important for IoT. However, radio-frequency (RF)-based wireless networks may fail to gua…