Painless, needle-free, and continuous glucose monitoring sensors are needed to enhance the life quality of diabetic patients. To that extent, we propose a first-of-its-kind, highly sensitive, noninvasive glycemic wearable multisensor system. The proposed validated on serum, animal tissues, models diabetes in clinical setting. measurement results during human trials reported high correlation (>0.9) between system's physical parameters blood levels, without any time lag. accurate real-time...

This letter presents a new planar inverted-F antenna design that is dedicated for integration within mobile devices such as phones and tablets. The proposed structure based on nested capacitive slots in order to achieve multiband behavior. presented also reduced size by 60%. then reconfigured using positive-intrinsic-negative (p-i-n) diodes are embedded the structure. Frequency reconfiguration achieved ensure all various commercial required bands of interest covered. Two prototypes...

This article leverages an automated quantum genetic algorithm (QGA) to design miniaturized antennas for Internet of Things (IoT) devices. The QGA implemented in this work automates the process and enables antenna designer generate static or reconfigurable microstrip folded topologies. is also a pixelation pattern within radiating surface optimally tune operation IoT communication needs as well Wi-Fi operation. In article, we present QGA-optimized both reconfiguration achieved through single...

In this paper, a reconfigurable patch antenna design operating at 868MHz for Low Power Wide Area Network (LoRa), 1.58 GHz Global Positioning System (GPS) and 2.4 Bluetooth is presented. The thanks to the integration of digitally tunable capacitor (DTC). DTC capacitance changes according 5 bits' sequence command. A microcontroller used assign required sequence, thus leading frequency reconfiguration. circular with gain that varies from 0.2 dB 6 based on desired operation reconfiguration...

In this paper, a new miniaturized folded patch antenna design is presented and proposed for IoT devices' implementation. The designed to operate at the ISM band (805-835MHz). achieves 95 % size reduction after resorting different techniques. These techniques include folding, slots slits in addition inductive loading using vias. fabricated measured where measurements show good agreement with simulated data.

This paper presents a compact ultra-high frequency (UHF) folded antenna design that relies on single radio micro-electro-mechanical switch (RF-MEMS) to reconfigure its of operation between 575 MHz and 760 MHz. The reconfigurable multi-layered has volumetric topology with total dimensions 40×40mm2; equivalent 0.11λx0.11λ at is fabricated tested where the measurements agree well simulation results. exhibits radiation efficiency 40% 62% Furthermore, proposed in cognitive environment validate...

This letter introduces a double-folded, polarization-reconfigurable, dual-antenna array for millimeter-wave communications. The proposed structure reconfigures its polarization by supporting either left- or right-handed circularly polarized radiation with maximum realized gain that reaches up to 15.8 dBic each state. Reconfiguration is achieved through the activation of single-pole-double-throw switch. A dedicated folded feeding network triangular power distribution designed achieve required...

This communication proposes the reconfiguration of a coplanar-fed single arm bowtie antenna structure by relying on integration digital tunable capacitor (DTC). The is presented in two configurations. first configuration 2-D topology with modified ground plane arrangement. second employs vertical folding for as well radiating arm. In addition, copper inserts are embedded within to further enhance compactness and transform it into 3-D topology. Both antennas initially designed operate at 868...

In this paper, we present several methods to extract the dielectric properties of a material using electromagnetic waves in guided and unguided media. These are used measure complex relative permittivity (ερ) permeability (μ^) under test (MUT). these methods, post processing algorithms such as Thru-Reflect- Line (TRL) Calibration Nicolson-Ross-Weir (NRW) employed provide required calibration standards conversion tools. They, along with frequency domain scattering parameters, characterize...

In this paper, an ultra-low power address detector is designed and implemented within a Radio Frequency (RF) wake-up receiver (WuRx) operating at Wi-Fi 802.11b/g bands. The aims to sensor from sleep mode active mode. WuRx receives call (WuC) as pulse with specific width that determines the of targeted sensor. Once pulsed WuC received by antenna front-end, it driven into rectifier circuit lodged WuRx. signal then forwarded identifies based on pulse. system relies components for selective RF...

In this paper, a compact reconfigurable semibowtie antenna design operating at 868MHz, 915 MHz, 1.8 GHz and 2.1 is presented. Reconfiguration of the achieved by resorting to digitally tunable capacitor (DTC). The capacitance change DTC occurs based on 5 bits sequence commands through microcontroller. Changing command sequences leads frequency reconfiguration. waveguide coplanar fed with gain that varies from 0.2 dB 2.7 in function operation reconfiguration state. presented proposed for...

In this study, a reconfigurable, two-element, multiple-input multiple-output (MIMO) printed inverted-F antenna (PIFA) is presented with an enhanced isolation ability. The MIMO system designed using three different reconfiguration techniques that are based on positive-intrinsic-negative diodes, radio frequency micro-electromechanical switches and varactors. Their impact the performance of PIFA evaluated in terms radiation characteristics, gain, power dissipated, efficiency, linearity, biasing...

In this paper, a digitally tuned flexible antenna is proposed for integration onto devices within the Internet of Things (IoT) paradigm. The design caters various IoT communication standards by reconfiguring its operating frequency. Accordingly, reconfiguration allows operation at 868 MHz, 915 1.8 GHz and 2.1 GHz. achieved resorting to tunable capacitor (DTC). DTC changes capacitance, hence frequency operation, relying on 5-bit sequence commands through microcontroller. coplanar waveguide...

This paper focuses on enhancing multiband isolation between two antenna elements in a reconfigurable multiple input output (MIMO) system. The antennas are printed inverted F (PIFA) that resort to PIN diodes each achieve frequency reconfiguration. the is proposed be improved through use of nested slots common ground plane elements. These collectively act as multi-band reject filter and improve at various operational frequencies MIMO system for integration into mobile devices with an operation...

This letter discusses an antenna system that steers its radiation pattern to personalize coverage in a wireless local area network scenario. The change the occurs either by mechanically rotating or electrically switching feeding toward appropriate structure. user controls personalized using Android-based voice recognition application on mobile device. Each structure operates at 5.28 GHz with 110 MHz bandwidth and increased gain around 7.5 dB. antenna's insures redistributed sector of two...

This paper presents a novel planar reconfigurable meandered loop antenna that is suitable for Internet of Things (IoT) applications. reconfigures its frequency operation between two ISM bands, 760 MHz and 575 MHz. The structure also has three folded edges, six layers with total dimensions 40×40mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . top layer (layer 1) patch placed on dielectric substrate an air gap. fed through shorting...

Antennas with reconfigurable electromagnetic performance over their lifetime are desired in space applications to tailor a changing environment. For spacecraft applications, physical shape change of conductors offers large reconfiguration potential. However, designing antennas that simultaneously lightweight, highly deformable, and stiff remains challenge. In this work, we propose radiation pattern quadrifilar helix antenna based on fiber reinforced polymer composite multi-stable helical...

Abstract This study proposes a highly sensitive portable device that utilizes electromagnetic waves and data analytics for instantaneous Severe Acute Respiratory Syndrome CoronaVirus 2 (SARS‐CoV‐2) detection. The consists of Radio Frequency (RF) circuit interprets reflected transmitted to identify virus signatures in physiologically significant matrices, including human saliva diluted nasopharyngeal swabs. sensor's accuracy is validated both pre‐clinical clinical settings, where measurements...

This paper presents a volumetrically folded antenna design that is further miniaturized and reconfigured by employing Quantum Genetic Algorithm (QGA). The employed QGA determines the pixelated topology of structure, its feeding point, position single switch reconfiguring antenna's frequency operation. As result, operates at 868 MHz 1.865 GHz when ON regains operation 2.4 OFF. In addition, size reduced 87% MHz, in comparison with planar antennas operating same frequency. presented...

A multi-stable fiber reinforced polymer composite helical latticed-based antenna is presented in this paper. The designed with a reconfigurable deployable Quadrifilar helix topology that exhibits two different stability states. first state has linear polarization an omnidirectional radiation pattern for terrestrial point to communication. second presents circular broadside propagation ensure satellite-ground was fabricated and tested where measurement results agree notably simulated designs....

In this paper, a highly sensitive portable multiband resonator is employed as sensor to instantaneously detect the presence of SARS-CoV-2 virus. At its core, leverages interaction between resonating electromagnetic waves and sample under test extract resulting changes in corresponding scattering parameters. Once these are recorded, machine learning data analytics algorithms applied correlate with or absence virus sample. The proposed fabricated validated pre-clinical clinical settings....

In this paper, a plug-and-play waveguide-based feeding network is presented to achieve steerable radiation by reconfiguring the phase shift between corresponding output ports. The proposed structure tailored serve 5G millimeter wave systems with pattern capabilities. More specifically, groove gap waveguide based designed split circularly polarized signal at input into four signals dual linearly characteristics. Such splitting accompanied reconfiguration capabilities grooves' distributions...