In this paper, a wide-scan angle planar patch phased array is proposed. The proposed composed of wideband probe-fed microstrip patches placed 0.087λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">h</sub> (λ the wavelength highest frequency) above individual ground planes and interlaced with parasitic decoupling walls. order to cancel feed probe inductance, elements comprise additional degrees freedom introduce controllable capacitance....

Design and implementation of a dual-band orthogonally polarized single-layer microstrip reflectarray are presented in this communication. The proposed operates two separated broad frequency bands within <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$X$ </tex-math></inline-formula> - notation="LaTeX">$K$ -bands. element consists circular patch surrounded by ring. Two curved phase delay lines attached to...

With the increasing global attention to deep learning and advancements made in applying convolutional neural networks electromagnetics, we have recently witnessed utilization of learning-based for predicting spectrum electromagnetic properties structures instead traditional tools like fully numerical-based methods. In this study, a Convolutional Neural Network (CNN is proposed spoof surface plasmon polaritons, enabling examination absorption metallic multilevel-grating (MMGS) designing...

This letter describes a gain enhancement method for dual-polarized substrate integrated waveguide cavity-backed slot antenna by using high-order cavity resonance to generate arbitrary levels of inclined linear polarization (LP). To do so, the metal posts are embedded in main excite TM220 mode and control amount coupling adjustable polarization. validate simulated results, an is designed, manufactured, tested. The proposed exhibits high front-to-back ratio (F/B) more than 20 dB broadside...

This paper proposes the use of unmanned aerial vehicles (UAVs) with intelligent reflecting surfaces (IRS) to reflect signals from industrial internet things (IIoT) destination, where power-domain non-orthogonal multiple access (PD-NOMA) is used in uplink. The objective our minimize average age information (AAoI) users affected by transmit power constraint, and UAV movement restrictions. By optimizing power, sub-carriers, trajectory, phase shift matrix elements, UAV-IRS on IIoT networks can...

In this paper, a novel wideband antenna with simple structure and low profile based on spoof surface plasmon polaritons (SSPPs) is proposed. The consists of periodically modulated corrugated metal strips as transmission lines, CPW feed, ground plate an reflector. SSPP line used to convert quasi-TEM mode achieve optimal impedance matching. prototype the end-fire has been designed fabricated. simulation results show that can gain 10.19 dB, bandwidth 146%, efficiency 90% in wide operating band...

A high voltage gain dual interleaved full bridge converter with Zero Voltage Switching (ZVS), improved integrated magnetics, and a new resonant Switched -Capacitor-Cell (RSC) is presented. By taking the advantage of switched capacitor cell transformers low turn-ratio as well leakage inductances, desired output can be obtained. Furthermore, diodes operate in Current (ZCS) condition, switches are maintained under ZVS condition over whole range load variations. In addition, turn off near zero...

In this paper, design and fabrication of a blade monopole antenna operating in 30 MHz-600 MHz is presented. Blade antennas are preferred structures airborne applications due to their light weight aerodynamic shape. Here, the structure with an oblique edge which shows improved impedance bandwidth comparison same total height no edge. The matched 50 Ω system VSWR <; 2 range MHz. pattern omnidirectional maximum gain (G) 5.6 dBi at 600 G > 0 frequency 150

The development of a 2-66-GHz ultra-wideband 45° slantpolarized omnidirectional antenna (SPOA) is described. radome enclosed and consists wideband biconical that provides radiation patterns with vertical polarization multiscreen polarizer converts into slant-polarization. To achieve high-performance characteristics, the geometrical dimensions are optimized. Invasive weed optimization algorithm used as an optimizer tool. In procedure, impedance bandwidth, pattern ripple in azimuth plane,...

An X‐band microstrip antenna array is fully designed. A multilayer structure chosen for the and radiating elements are fed by aperture‐coupled patch technique. mono‐pulse feeding network also designed which distributes power to in a way that low sidelobe level created sum pattern both difference patterns. The measurement simulation results coincide well whole bandwidth.

The analysis and synthesis of metasurfaces are important because their emerging applications in a broad range the operational wavelengths from microwaves to visible light spectrum. Moreover, many applications, like optical nanoantennas, absorbers, solar cells, sensing, presence substrate is apparent. Therefore, understanding effects substrates upon important, as typically affect resonance behaviors particles, well interactions between them. In order consider impacts substrates, this paper...

This research explores strategies to augment the connectivity among users within Hierarchical Non-Terrestrial Networks (HNTNs) dedicated Disaster Relief Services (DRS). The primary goal is optimize radio resources, computing capacities, and trajectories of Unmanned Aerial Vehicles (UAVs) at each time slot, aiming maximize number satisfactory connections (NSCs). UAVs function as aerial base stations (ABSs), establishing links for reduced capability (RedCap) user equipment (UE) using power...

<title>Abstract</title> In the realm of sensor technology, it is a significant challenge to accurately identify and differentiate sample materials in gas phase, especially when they have closely similar refractive indices. A promising solution THz range use plasmonic spoof surface structures configured an Otto arrangement. This configuration increases sensitivity by amplifying trapped fields within periodic structure material. represents remarkable improvement over conventional...

The polarizability tensors of a particle are its characteristic parameters, which once obtained, can be applied as equivalent representations the in any problems involving plane wave illuminations. In this paper, generalized Kerker’s conditions for unidirectional scattering derived, case normal and oblique incidence, terms arbitrary nanostructures homogeneous media located on dielectric substrates. order to present structures that corroborate derived from such polarizabilities, first, effect...

Abstract In this paper, a novel wideband end-fire antenna, based on spoof surface plasmon polaritons (SSPP) transmission line, is proposed. Periodically modulated corrugated metal strips are used as line for quasi-TEM conversion in the microstrip to state of SSPP and best impedance matching. Due strong confinement field waveguide its high performance, it has been line. The antenna consists waveguides plate ground reflector strip director, two half-rings realize radiation, reaching wide...

In this paper, for the purpose of investigating horizontal sound propagation, based on results obtained from practical measurements in Strait Hormuz and available data speed variations at different depths, a comprehensive model shallow water multipath acoustic channel is presented. The mathematical modeling effect ray theory image method. modeling, attenuation due to wave scatterings surface their bottom reflections accounted for. addition, we consider attenuations absorption by materials...

The presence of a substrate, when working with nanoparticles, is essential in many applications, like optical nanoantennas, solar cells, and sensing. Understanding the effects substrates upon nanoparticles is, therefore, important, as typically affect resonance behaviors particles, well interactions between their electric magnetic resonances. In order to better understand impacts practical applications this paper presents semianalytical method calculate polarizability tensors individual...

Compressive sensing (CS) theory has been recently used to obtain high-resolution inverse synthetic aperture radar (ISAR) images. In this paper a compressive algorithm is reconstruct the ISAR image with limited measurements for linear frequency modulated (LFM) signal. order speed up reconstruction and reduce memory usage, we exploit two-dimensional (2D) optimization method solve sparsity-driven problem. Finally, experimental results using real data of an airplane ship show that approach...

A novel dual-band electronically beam scanning antenna based on a slot active frequency-selective surface (SAFSS) is proposed in this article. Each unit cell used an SAFSS screen has two slots with four variable capacitors utilized to achieve high tuning ranges and dual modes. To adequate single mode, specific capacitances are each overlap the resonances. These modes create conditions for control beams bands simultaneously. An prototype operating at 1.5- 2.45-GHz frequency fabricated...

A broadband dual-polarized omnidirectional antenna is presented. The proposed consists of two parts, an asymmetric biconical and a cylindrical multilayer polarizer. To have almost perfect radiation pattern in the horizontal plane main radiating beam position at around , elevation plane, used. Moreover, to provide dual polarization performance over 2–18 GHz operational bandwidth, polarizer designed optimized. Numerous simulations via Ansoft HFSS CST microwave Studio CAD tools been made...

In this letter, design, simulation, and fabrication of a high-gain wideband waveguide slot array antenna at X-band frequency is presented. To reach the required bandwidth, whole divided into several subarrays. The designing process includes an iterative procedure to determine structure, number radiating slots in each subarray, offset length slot, along with orientation coupling slot. For purpose, MATLAB program based on Elliott formulas developed. full-wave simulation carried out bandwidth...

Detection of sea-surface small floating targets in maritime high-resolution surveillance radar has been an active area research recent years. In this paper, we propose a new detector based on complex-valued independent component analysis (cICA) algorithm proposed by Geng-Shen Fu et al. called complex entropy rate bound minimization (CERBM), to look for polarimetric radars. It uses received time series at cell under test (CUT) with different polarizations as distinct mixtures. The can exploit...

This paper investigates the behavior of a dipole antenna near perfect electric conductor, magnetic and artificial conductor (AMC). The phase variations due to reflector reflection coefficient distance between are analyzed, their effect on radiation patterns studied for different frequencies. cause null occurrence in broadside direction pattern when using AMC (or HIS) as is explored. It shown that this degradation reflected waves at angles from surface phenomenon may occur any type reflector....

A new method for analyzing multispectral inhomogeneous metasurfaces is presented, which includes several types of particles. Our proposed (PM) suggests a semianalytical technique to solve the total effective polarizabilities arrays. Here, we propose inhomogeneity in metasurface can be regarded as constituting arrays periodic supercells. Closed-form relations are suggested calculate interaction constants inside supercells, and local obtained with aid these relations. Then, conventional used...