Abstract Using reconfigurable intelligent surfaces (RISs) to improve the coverage and data rate of future wireless networks is a viable option. These are constituted significant number passive nearly components that interact with incident signals in smart way, such as by reflecting them, increase system's performance result which notion radio environment comes fruition. In this survey, study review RIS‐assisted communication supplied starting principles RIS include hardware architecture,...

In this study, a novel dual‐band multiple‐input multiple‐output (MIMO) rectangular dielectric resonator antenna (DRA) for Worldwide interoperability microwave access (WiMAX) (3.4–3.7) GHz and wireless local area network (WLAN) (5.15–5.35) applications is proposed investigated. The design operates at fundamental TE δ11 x , 1δ1 y higher order δ21 2δ1 modes, excited through two coaxial probes, symmetrically placed adjacent to the DRA. A compact achieved by stacking high permittivity material....

This paper presents a multi-bit reconfigurable intelligent surface (RIS) with high phase resolution, capable of beam-steering in the azimuthal plane at sub-6 Gigahertz (GHz). Field trials realistic indoor deployments have been carried out, coverage enhancement performance ascertained for three common wireless communication scenarios. Namely, serving users an open lobby mixed line sight and non-line conditions, via junction between long corridors, multi-floor scenario propagation windows....

Human activity monitoring is an exciting research area to assist independent living among disabled and elderly population. Various techniques have been proposed recognise human activities, such as exploiting sensors, cameras, wearables, contactless microwave sensing. Among these, the sensing has recently gained significant attention due its merit solve privacy concerns of cameras discomfort caused by wearables. However, existing a basic disadvantage requiring controlled ideal settings for...

Abstract Terahertz (THz) spectral region from 0.1 to 3 THz is envisaged hold immense potential in the next generation of wireless technologies. Recently, research has focused on this terahertz gap, because its unprecedented channel capacities. At physical layer, design complexities and fabrication devices, especially antennas are prime bottlenecks realize full potential. This article introduces a cost-effective, easy-to-fabricate, reproducible sub-THz antenna based single-layer planar...

Abstract This work proposes a novel multi-band reflective metasurface, that is capable of linear polarization (LP), and circular (CP) conversion in Ku, K, Ka, U Bands. The metasurface design involves combination ring square elements strategically arranged, printed on 0.76 mm thin-grounded Rogers RO3003 substrate. achieves LP for y -polarized incident electromagnetic (EM) wave 16.2–17.2 GHz, 23.0–25.4 40.3–54.35 GHz frequency bands. ratio (PCR) ranges minimum 90% with an fractional bandwidth...

The microwave frequency band typically used for wireless communications will soon become saturated and no longer be able to fulfill the high bandwidth demands of modern communication networks. Terahertz (THz) has appeared as a highly attractive, future-generation technology that offers higher spectral and, therefore, data rates. However, full exploitation THz technologies is contingent upon availability energy-efficient sources devices. In this letter, we present fabrication measurement...

Following the standardization and deployment of 5G network, researchers have shifted their focus to beyond (B5G) communication. Existing technologies brought forth a plethora applications that could not been imagined in past years. B5G will enable us rethink capability it offer various sectors, including agriculture, search rescue, and, more specifically, delivery health-care services. Unobtrusive noninvasive measurements using radio-frequency (RF) sensing, monitoring, control wearable...

The 57–71-GHz millimeter-wave (mmWave) industrial, scientific, and medical (ISM) band holds significant potential for enhancing the performance of next-generation industrial wireless applications. This article first presents design analysis a compact high-performance eight-element series-fed frequency beam-scanning array designed to cover entire 21.87% fractional bandwidth (FBW) ISM band. Using this as subarray, hybrid parallel–series feed topology is construct 64-element ( <inline-formula...

In this paper, for the first time we present complete design of a dynamic metasurface antenna (DMA) array at 60 GHz millimeter-wave (mmWave) industrial, scientific, and medical (ISM) band. First, novel complementary electric inductive-capacitive (CELC) metamaterial element (unlike conventional rectangular CELC) is designed to resonate around 60.5 GHz. The proposed CELC meta-element in its resonance state manifests dispersive characteristics exhibits significant left-handed properties such as...

Abstract Linear polarization (LP) and circular (CP) holds paramount importance in Ku, K, Ka bands for satellite based communication, remote sensing applications. Satellite applications face challenges like atmospheric attenuation, noise &amp; interference, signal degradation. Moreover, communication application demands CP two distinct, non-adjacent frequency with orthogonal polarizations at greater oblique angles, considering the unpredictable incidence angles of electromagnetic (EM) waves....

Dynamic Metasurface Antennas (DMAs) are transforming reconfigurable antenna technology by enabling energy-efficient, cost-effective beamforming through programmable meta-elements, eliminating the need for traditional phase shifters and delay lines. This breakthrough is emerging to revolutionize next-generation wireless communication sensing networks. In this paper, we present design real-world implementation of a DMA-assisted platform operating in license-free 60 GHz millimeter-wave (mmWave)...

This study presents work carried out on a multiband‐dielectric resonator antenna (M‐DRA) for long‐term evolution (LTE) application. A new stack M‐DRA is introduced by using two dielectric resonators of different permittivities, stacked top each other. The excited coaxial probe. introduction finite planar conducting wall reduces the overall size proposed M‐DRA. It operates at LTE band‐VI (828–880 MHz), GSM 1800/1900 and UMTS 2100 S 11 &lt;−10 dB. measurements performed with fabricated showed...

In this work, a dielectric resonator antenna (DRA) is miniaturized by using Artificial Magnetic conductor (AMC) surface without disturbing other important parameters. The design has three main features: (i) simple micro-strip line feeding, (ii) use of parasitic metallic strip to achieve impedance matching, and (iii) AMC for miniaturization. miniaturization performed at 3.5 GHz. Without changing the basic characteristic such as gain, resonance frequency efficiency, size was reduced 85%. DRA...

Abstract Reconfigurable Intelligent Surfaces have recently emerged as a revolutionary next-generation wireless networks paradigm that harnesses engineered electromagnetic environments to reshape radio wave propagation. Pioneering research presented in this article establishes the viability of Surfaces-enhanced indoor localisation and charts roadmap for its integration into network architectures. Here, we present comprehensive experimental analysis Surfaces-enabled scheme evaluates accuracy...

Abstract A compact UWB monopole band‐notched antenna with simple structure and small size is proposed studied in this article. The of the 33 × 29.6 1.6 mm. has an impedance bandwidth (VSWR &lt; 2) at 3.1–10 GHz, except 3.3–3.7 GHz 5.15–5.82 for WLAN WiMAX application. notch ground plane used to obtain a frequency response inverted U‐shaped slot radiator patch rejection band GHz. prototype fabricated tested, it observed that measured simulated results are good agreement. © 2014 Wiley...