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Book
Engineering Metamaterials
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Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

A couple of decades have passed since the advent of electromagnetic metamaterials. Although the research on artificial microwave materials dates back to the middle of the 20th century, the most prominent development in the electromagnetics of artificial media has happened in the new millennium. In the last decade, the electromagnetics of one-, two-, and three-dimensional metamaterials acquired robust characterization and design tools. Novel fabrication techniques have been developed. Many exotic effects involving metamaterials and metasurfaces, which initially belonged in a scientist’s lab, are now well understood by practicing engineers. Therefore, it is the right time for the metamaterial concepts to become a designer’s tools of choice in the landscape of electronics, microwaves, and photonics. Answering such a demand, the book “Engineering Metamaterials” focuses on the theory and applications of electromagnetic metamaterials, metasurfaces, and metamaterial transmission lines as the building blocks of present-day and future electronic, photonic, and microwave devices.


Book
Antennas and Propagation
Authors: --- --- --- ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

This Special Issue gathers topics of utmost interest in the field of antennas and propagation, such as: new directions and challenges in antenna design and propagation; innovative antenna technologies for space applications; metamaterial, metasurface and other periodic structures; antennas for 5G; electromagnetic field measurements and remote sensing applications.

Keywords

5G mobile communication --- Sub-6-GHz --- compact antenna --- channel selection --- channel filters --- metamaterials --- antenna radiation measurements --- common mode current --- distance averaging --- multipath site --- small antenna --- loop probe --- log-periodic dipole array --- wideband antenna --- VHF --- cross polarized --- array element --- radio detection --- cosmic rays --- ultra-wide band antennas --- energy-based antenna descriptors --- pulsed sources --- direction finding --- dual-band dipole --- CRLH antenna --- dual-band balun --- CRLH balun --- wireless communication --- textile antenna --- wearable antenna --- SAR --- flexible antenna --- low-profile antenna --- sensor network --- active test --- UWB --- 802.15.4z --- timestamp detection --- ranging --- multipath --- frequency fading --- dye-sensitized solar cells --- integration --- antenna array --- solar antenna --- multibandoperation --- slotted antenna --- microwave --- millimeter-wave band --- WLAN --- 5G --- frequency multiplexed --- IoT --- millimeter-waves --- multi-band --- n-band antenna --- antenna as a sensor --- meander line antenna --- periodic structure --- millimeter-wave antenna --- frequency scanning antenna --- leaky-wave antenna --- planar sensor --- non-invasive --- Split Ring Resonator --- dielectrics measurements --- RF absorbing materials --- higher symmetries --- glide symmetry --- periodic structures --- mode matching --- dispersion analysis --- radar cross section (RCS) measurement --- near-field to far-field transformation (NFFFT) --- spherical wave expansion (SWE) --- anisotropy --- dielectric constant --- material characterization --- planar resonators --- substrate bending --- textile fabrics --- wearable radiators --- reflectarray antennas --- multibeam antennas --- dual band reflectarrays --- communication satellites --- Ka-band --- near-field antenna effect --- radar calibration --- MIMO radar --- turntable radar --- UWB radar --- radar system --- scattering imaging --- inverse scattering problem --- radar resolution --- photomixer --- terahertz source --- two dimensional photonic crystal --- frequency selective surface superstrate --- terahertz antenna --- dielectric resonator antenna --- biomedical devices --- wireless communication link --- near-field region --- impedance matching characteristics --- horizontal polarization --- UAV ground station --- Omni-directional --- wireless power transmission (WPT) --- energy harvesting --- rectenna --- wireless sensors --- n/a


Book
Recent Technical Developments in Energy-Efficient 5G Mobile Cells
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Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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This book addresses the true innovation in engineering design that may be promoted by blending together models and methodologies from different disciplines, and, in this book, the target was exactly to follow this approach to deliver a new disruptive architecture to deliver these next-generation mobile small cell technologies. According to this design philosophy, the work within this book resides in the intersection of engineering paradigms that includes “cooperation”, “network coding”, and “smart energy-aware frontends”. These technologies will not only be considered as individual building blocks, but re-engineered according to an inter-design approach resulting in the enabler for energy efficient femtocell-like services on the move. The book aims to narrow the gap between the current networking technologies and the foreseen requirements that are targeted at the future development of the 5G mobile and wireless communications networks in terms of the higher networking capacity, the ability to support more users, the lower cost per bit, the enhanced energy efficiency, and adaptability to new services and devices (for example, smart cities, and the Internet of things (IoT)).

Keywords

microstrip --- tuneable filter --- microwave filter --- 5G --- MEMSs --- varactor --- 4G --- CR --- MIMO --- reconfigurable antenna --- switch --- UWB --- WiMAX --- WLAN --- wireless communications --- cooperative NOMA --- multi-points DF relaying nodes --- half-duplex --- full-duplex --- Rayleigh fading channels --- Nakagami-m fading channels --- energy harvesting --- non-orthogonal multiple access --- multiple antenna --- transmit antenna selection --- outage probability --- pattern reconfigurable --- patch antenna --- s-parameters --- frequency reconfigurable --- dual-band Doherty power amplifier --- LTE-advanced --- high-efficiency --- phase offset lines --- impedance inverter network --- phase compensation network --- High power amplifiers --- high efficiency --- Doherty power amplifier --- GaN-HEMT --- small cell --- maximum transmit power --- UE --- open-loop power control --- interference --- ergodic capacity --- non-linear energy harvesting --- NOMA --- monopole antenna --- S-parameters --- 5G, 4/4.5G --- LTE --- ISM --- WiFi --- 5G antenna --- slot antenna --- mobile terminal antenna --- MIMO antenna --- medical applications --- miniaturized antenna --- arc-shaped --- dual-band --- chiral --- Tellegen --- multilayer CPW structure --- dispersion characteristics --- full-GEMT --- Muller’s method --- complex propagation constant --- acceleration procedure --- ISM 2.4 GHz --- isolation --- envelope correlation coefficient (ECC) --- channel capacity loss (CCL) --- 5G technology --- CPW-fed antenna --- diversity antenna --- future smartphones --- MIMO systems --- n/a --- Muller's method


Book
Antenna Design for 5G and Beyond
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Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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With the rapid evolution of the wireless communications, fifth-generation (5G) communication has received much attention from both academia and industry, with many reported efforts and research outputs and significant improvements in different aspects, such as data rate speed and resolution, mobility, latency, etc. In some countries, the commercialization of 5G communication has already started as well as initial research of beyond technologies such as 6G.MIMO technology with multiple antennas is a promising technology to obtain the requirements of 5G/6G communications. It can significantly enhance the system capacity and resist multipath fading, and has become a hot spot in the field of wireless communications. This technology is a key component and probably the most established to truly reach the promised transfer data rates of future communication systems. In MIMO systems, multiple antennas are deployed at both the transmitter and receiver sides. The greater number of antennas can make the system more resistant to intentional jamming and interference. Massive MIMO with an especially high number of antennas can reduce energy consumption by targeting signals to individual users utilizing beamforming.Apart from sub-6 GHz frequency bands, 5G/6G devices are also expected to cover millimeter-wave (mmWave) and terahertz (THz) spectra. However, moving to higher bands will bring new challenges and will certainly require careful consideration of the antenna design for smart devices. Compact antennas arranged as conformal, planar, and linear arrays can be employed at different portions of base stations and user equipment to form phased arrays with high gain and directional radiation beams. The objective of this Special Issue is to cover all aspects of antenna designs used in existing or future wireless communication systems. The aim is to highlight recent advances, current trends, and possible future developments of 5G/6G antennas.

Keywords

double-fed slot antenna --- MIMO system --- mobile terminals --- polarization diversity --- UWB technology --- 5G --- future handsets --- modified PIFA --- multi-antenna system --- multi-band operation --- MIMO --- 5G mobile handsets --- dual-band antenna --- microstrip patch antenna --- millimeter-wave --- high gain --- transmitarray (TA) antenna --- metasurface (MS) --- PSO --- side-lobe level (SLL) reduction --- lens antenna --- negative refractive index --- multibeam --- beam scanning --- beyond-5G --- 6G --- interference alignment --- K-User MIMO --- OFDM --- wideband antenna --- MIMO antenna --- four-port wideband antenna --- substrate integrated waveguide (SIW) --- transmission zeros (TZs) --- metallic via --- coupling topology --- antenna array --- antenna measurements --- beam pattern --- beam steering --- equivalent circuit modelling --- transmitarray --- chirality --- dielectric resonator antennas --- metasurfaces --- antipodal Vivaldi antenna (AVA) --- millimeter wave --- compact --- 5G applications --- corrugations --- reconfigurable antennas --- reconfigurable parasitic layers --- antenna optimization --- antenna design --- nonlinear characterization --- behavioral modelling --- x-parameters --- PIN diode --- dielectric resonator antenna --- aperture coupled --- 26 GHz --- small cell --- active metamaterial antenna --- continuous tuning --- resonance blindness --- EM co-simulation --- nonlinear property --- phased array --- massive MIMO --- wideband array --- triangular grid --- n/a


Book
Passive Planar Microwave Devices
Authors: ---
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

The aim of this book is to highlight some recent advances in microwave planar devices. The development of planar technologies still generates great interest because of their many applications in fields as diverse as wireless communications, medical instrumentation, remote sensing, etc. In this book, particular interest has been focused on an electronically controllable phase shifter, wireless sensing, a multiband textile antenna, a MIMO antenna in microstrip technology, a miniaturized spoof plasmonic antipodal Vivaldi antenna, a dual-band balanced bandpass filter, glide-symmetric structures, a transparent multiband antenna for vehicle communications, a multilayer bandpass filter with high selectivity, microwave planar cutoff probes, and a wideband transition from microstrip to ridge empty substrate integrated waveguide.


Book
Wireless Power/Data Transfer, Energy Harvesting System Design
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Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

This book focuses on emerging wireless power/data and energy harvesting technologies, and highlights their fundamental requirements, followed by recent advancements. It provides a various technical overview and analysis of key techniques for wireless power/data and energy harvesting system design. The state-of-the-art system introduced in this book will benefit designers looking to develop wireless power transfer and energy harvesting technologies in a variety of fields, such as wearable, implantable devices, home appliances, and electric vehicles.

Keywords

wireless power transfer --- capacitive power transfer --- parallel-plate contactless power --- MIMO --- NOMA --- precoding --- power allocation --- user-clustering --- power splitter --- mobile sensor --- hopping sensor --- relocation protocol --- energy efficient protocol --- internet of things (IoTs) --- wireless sensor networks (WSNs) --- simulation --- inductive power --- dual impedance --- dual band --- reflected resistance --- frequency splitting --- multiple coils --- mutual inductance --- parasitic effect --- practical mutual inductance --- transfer impedance --- wearable heater --- inductive-power transmission --- textile coil --- impedance matching network --- parasitic resistance --- power loss --- reflection coefficient --- Smith chart --- cylindrical joint --- electromagnetic fields --- rotation-free structure --- soil sensing --- decision agriculture --- smart farming --- Wireless Power Transfer (WPT) --- compensation topology --- optimal load --- output power level --- electric vehicle (EV) --- capacitive power transfer (CPT) systems --- wireless power transfer (WPT) systems --- e-class inverter --- wireless resonance energy link system --- cognitive radio --- energy harvesting --- full-duplex relay --- simultaneous wireless information and power transfer (SWIPT) --- zero-forcing precoding --- shielded loop coil --- SAR --- coupled resonance --- coil resistance --- substrate size --- implantable biomedical microsystems --- data telemetry --- low power --- high data rate --- binary phase-shift keying demodulation --- electric vehicle --- center alignment point --- ferrite antenna --- laser wireless power transmission --- PV module --- maximum power point --- battery charging --- wirelessly-powered cage --- inductive power transmission --- implantable medical device --- animal experiment --- reference circuit --- inductive link --- implantable device --- line regulation --- wireless power telemetry --- supply independence --- balanced coil --- foreign object detection --- Maxwell bridge --- metal object detection --- wireless power transmission (WPT) --- power conversion efficiency (PCE) --- mm-sized implant --- duty cycle --- pulsed power transmission --- power transfer efficiency (PTE) --- rectifier


Book
Advanced Technology Related to Radar Signal, Imaging, and Radar Cross-Section Measurement
Authors: ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Radar-related technology is mainly processed within the time and frequency domains but, at the same time, is a multi-dimensional integrated system including a spatial domain for transmitting and receiving electromagnetic waves. As a result of the enormous technological advancements of the pioneers actively discussed in this book, research and development in multi-dimensional undeveloped areas is expected to continue. This book contains state-of-the-art work that should guide your research.

Keywords

inverse synthetic aperture ladar (ISAL) --- maneuvering target --- integral cubic phase function (ICPF) --- fractional Fourier transform (FRFT) --- non-uniform fast Fourier transform (NUFFT) --- CLEAN technique --- simultaneous polarimetric radar --- constant modulus sequences --- correlation properties --- doppler tolerance --- saliency preprocessing LLC --- saliency detection --- image processing --- scene classification --- antenna array --- automatic guided vehicle --- DoA/DoD estimation --- MIMO radar --- direct position determination --- Doppler --- Doppler rate --- maximum likelihood estimator --- coherent pulse trains --- single moving sensor --- Cramer–Rao lower bound --- bistatic MIMO radar --- DOD/DOA estimation --- mutual coupling --- off-grid sparse problem --- unmanned aerial vehicle --- clustering methods --- man-made targets --- synthetic aperture radar (SAR) --- inverse synthetic aperture radar (ISAR) --- polarimetric decomposition --- Synthetic Aperture Radar (SAR) --- microwave imaging --- constitutive parameters --- conductivity --- permittivity --- tomography --- RF MEMS --- switch --- analytical approach --- low control voltage --- high switching speed --- high reliability --- radar echo cancellation --- frequency shifting modulation --- interrupted sampling --- radar jamming --- deception jamming --- remote sensing --- SAR --- radon transform --- speckle noise filtering --- maritime traffic monitoring --- wake detection and analysis --- synthetic aperture radar --- differential SAR tomography --- squinted SAR --- 3-D deformation --- 2-D PPS --- maneuvering target detection --- coherent integration --- motion parameter estimation --- second-order phase difference (SoPD) --- time-frequency analysis --- image fusion --- sparse representation --- hyperbolic tangent function --- guided filter --- narrowband interference separation --- block sparse Bayesian learning --- sensing matrix optimization --- block coherence measure --- bistatic inverse synthetic aperture radar --- linear geometry distortion --- prior information --- least square error --- lunar penetrating radar --- local correlation --- SNR --- K-L transform --- seislet transform --- generative adversarial nets --- through-wall radar imaging --- multipath ghost suppression --- generator and discriminator --- ultrahigh resolution --- spaceborne --- curved orbit --- series reversion --- singular value decomposition (SVD) --- deramping-based approach --- crosshole ground penetrating radar (GPR) --- Bayesian inversion --- Markov chain Monte Carlo (MCMC) --- forward model --- modeling error --- discrete cosine transform (DCT) --- through-wall imaging --- contrast target detection --- clutter reduction --- entropy thresholding --- low-rank approximation --- S-transformation --- ISAR --- micro-Doppler --- synchrosqueezing --- PBR (passive bistatic radar) --- clutter suppression --- non-uniform grid --- dilation morphology --- passive bistatic radar --- phased array radar --- parameter estimation --- aircraft surveillance --- GPR --- seasonal permafrost --- electromagnetic wave attribute --- relative water content --- marine radar --- wind direction retrieval --- small wind streak --- local gradient method --- adaptive reduced method --- energy spectrum method --- metamaterial absorber --- double negative --- dual-band --- FMCW radio altimeter --- methodological error --- critical height --- altitude measurement accuracy --- height pulses --- ultra-wide frequency deviation --- sparse recovery --- wideband noise interference --- dechirping --- subspace extraction --- denoising detection --- orthogonal matching pursuit --- pulse radar --- rotating target --- micro-motion feature extraction --- interrupted transmitting and receiving (ITR) --- dual-polarized radar --- DOA estimation --- atomic norm --- comprehensive SAR --- multiparametric SAR observation --- discrete scatterer model --- n/a --- Cramer-Rao lower bound

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