This paper presents a compact frequency reconfigurable antenna for flexible devices and conformal surfaces. The consists of simple easy to fabricate structure consisting stub loaded circular radiator, designed on commercially available RT5880 substrate (ε <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</sub> = 2.2) with thickness 0.254 mm. combination loading slot etching techniques are utilized achieve the advantages compactness,...

An ultra‐compact dual‐polarised ultra‐wideband multi‐input multi‐output antenna made with a single‐shared‐radiating element and two meandered feeding lines are proposed. Miniaturisation is achieved by using combination of techniques, including resonant stub connected to the ground through which shorts excessive coupled energy before it reaches other port minimises coupling, slots etched in radiator that also help minimise mutual while allow bring closer greatly reduce overall size antenna....

A compact planar UWB-MIMO antenna array with WLAN band rejection is presented. The consists of four monopole radiators and a common ground plane. These monopoles are placed in such way that the polarisation diversity nearly exploited, resulting high isolation. proposed MIMO electrically small (50 × 39.8 mm2), printed on low loss 1.524 mm thick Rogers TMM4 laminate dielectric constant 4.5 tangent 0.002. band-stop design was inserted plane to behave similar LC filter reject band. Simulation...

An eight element, compact Ultra Wideband-Multiple Input Multiple Output (UWB-MIMO) antenna capable of providing high data rates for future Fifth Generation (5G) terminal equipments along with the provision necessary bandwidth Third (3G) and Fourth (4G) communications that accomplishes band rejection from 4.85 to 6.35 GHz by deploying a Inductor Capacitor (LC) stub on ground plane is presented. The incorporated also provides flexibility reject any selected as well control. orthogonal...

This paper reports a multiband Yagi-Uda shaped metamaterial absorber (YUMA) operating in X- and Ku-band of the microwave regime with added functionalities miniaturization, polarization controllability wide incidence angle stability. The proposed YUMA shows three distinctive near-unity absorption peaks corresponding to 10.64 GHz, 12.08 14.09 GHz frequencies. was analyzed under different oblique angles for transverse electric (TE)-mode rotation top metasurface. results showed that possesses...

A compact flexible multi-frequency antenna for smart portable and devices is presented. The consists of a coplanar waveguide-fed slotted circular patch connected to rectangular secondary resonator (stub). thin low-loss substrate used flexibility, stub in the feedline deployed attain wide operational bandwidth. slot etched middle patch, p-i-n diode placed at its center. frequency reconfigurability achieved through switching that distributes current by changing antenna's electrical length. For...

ABSTRACT This article presents a four elements frequency reconfigurable ultrawideband (UWB) multiple‐input‐multiple‐output (MIMO) design, capable of rejecting on‐demand WLAN band ranging from 4.8 to 6.2 GHz. The proposed design consists two U‐shaped monopole UWB radiators and circular slotted‐monopole radiators. These are placed orthogonally with respect each other exploit polarization diversity, whereas the PIN diodes used connect band‐stop ground plane introduce rejection feature. An...

Abstract In this article, a novel design of compact planar Ultra Wideband (UWB) monopole antenna with dual band notched characteristics has been presented. The unique structure meeting UWB standards. proposed is fed through micro strip feed line, whereas better impedance achieved by truncating the ground plane. notches are incorporating meandered slot on radiator patch and U‐slot in line. fabricated FR‐ substrate having size . A good agreement observed between measured simulated results....

The ever-growing demand for low power, high performance, cost-effective, low-profile, and highly integrated wireless systems emerging applications has triggered the need enormous innovations in transceiver systems, components, architectures technologies. This is especially valid antenna which an integral component of contributes significantly determining their overall performance. Antenna-on-Chip (AoC) alternative technology, drawn a substantial attention recent days because its various...

Radio-frequency (RF)-based wireless power transfer method is highly desirable to deep-body medical implants, such as cardiac pacemakers. The antenna one of the essential components system; however, it poses significant design challenges for applications and must be modeled characterized correctly achieve required performance. In this paper, validation a novel wideband numerical model (WBNM) are proposed deeply implantable antennas enable RF-powered leadless pacing. particular, we acquired...

A compact four-element multiple-input-multiple-output (MIMO) antenna for ultra-wideband (UWB) applications with WLAN band-notched characteristics is proposed here. The has been designed to operate from 2 12 GHz while reject the frequencies between 4.9 6.4 GHz. four elements are placed orthogonal attain polarization diversity and high isolation. thin stub connected ground plane deployed as a LC notch filter accomplish rejected band in each element. mutual coupling adjacent at least 17 dB it...

A comprehensive novel framework for retrofitting frequency-selective surface (FSS) shields to any glass using low-cost copper foils has been proposed in this work. The realization technique is demonstrated through a triband FSS shield. Global System Mobile Communication (GSM)-1800, Wi-Fi 2.5 GHz, and wireless local area network (WLAN) 5.6 GHz spectrum, with–10 dB bandwidth of 680, 190, 1300 MHz, respectively, are suppressed by the unit cell made up combination square circular concentric...

The management of heart failure patients via the implantation cardiac pacemakers has become a well-known therapy. However, complications associated with traditional are usually related to finite-battery life, transvenous pacing leads, and subcutaneous device pocket. In this paper, we propose wearable RF-powered leadless system, which can be implanted directly inside powered RF energy, without any batteries or leads. More specifically, have realized prototype rectenna-based pacemaker (LP),...

This paper presents a highly compact frequency-selective surface (FSS) that has the potential to switch between X-band (8 GHz–12 GHz) and C-band (4 GHz–8 for RF shielding applications. The proposed FSS is composed of square conducting loop with inward-extended arms loaded curved extensions. symmetric geometry allows shield perform equally transverse electric (TE), magnetic (TM), 45° polarizations. unit cell dimension 0.176 λ0 excellent angular stability up 60°. resonance mechanism was...

A biological interaction of malacological study was carried out from November 2017 to February 2018 investigate the distribution and diversity freshwater snails four sites along Chenab River: Head Marala, Wazirabad, Shahbaz Pur, Rasool Pur. The hand-picking hand-scoop methods were applied collect samples every two weeks. Collected washed with potable water. identification accomplished by using literature taxonomic keys. To identify specimens, morphometric analysis shells determined a digital...

In this article, an antenna with two patch elements is pattern and frequency reconfigured. One feed line used to excite the placed at any angle respect each other. The maximum rotation of element incorporated 45°. For impedance matching 50 Ω, both are fed from corner. radiating simultaneously using one help PIN diodes. When 1 excited by biasing diode 1, a broad side radiation in yz plane observed. Therefore, for 7.5° about 5° Similarly, 2, resulted excitation Patch 2. It observed that...

A compact reconfigurable UWB MIMO antenna with four radiators that accomplish on-demand band rejection from 4.9 to 6.3 GHz is presented. An LC stub connected the ground plane by activating PIN diode for each radiator. Two are placed perpendicular other exploit polarization diversity on a 25 × 50 mm 2 FR4 laminate. additional then fixed obliquely same laminate (without increasing size) in angular configuration at ±45 ∘ first two planar still exploiting diversity. The design validated...

Fifth generation (5G) communication systems deploy a massive MIMO technique to enhance gain and spatial multiplexing in arrays of 16 128 antennas. In these arrays, it is critical isolate the adjacent antennas prevent unwanted interaction between them. absorbers, this regard, are recent interest many researchers nowadays. The authors present dual-band novel metamaterial-based 5G absorber. absorber operates at 24 GHz 28 composed symmetric meander lines connected through transmission line. An...

A conformal cylindrical phased array antenna excited with composite right/left-handed (CRLH) phase shifters is proposed. The tuning of the CRLH shifter achieved by embedding novel magneto-static field-responsive micron-sized particles in its structure. It shown that through tiny magnet activation these at appropriate locations along length stub and inter-digital fingers, variable shifts are obtained. proposed particle-based operates C-band (5–6) GHz a low insertion loss error. 1 × 4 four...

A multiple-input-multiple-output (MIMO) antenna with dual polarization, operating in the UWB frequency range is proposed. The radiator shared by two elements, which greatly reduces overall size of MIMO system. Slots are etched to achieve desired isolation among elements. Dual polarization characteristics attained far-field due orthogonal currents. comparison simulated and measured results show that proposed operates on a wide from 3 11 GHz low mutual coupling (<−15 dB) also envelope...