ABSTRACT This article presents a novel circularly polarized stacked dielectric resonator antenna (DRA) featuring etched slots arranged in an L‐pattern within the ground plane. An analysis of current distribution on plane reveals that inclusion these results formation two distinct paths. This, turn, leads to measured resonances: one at 6.3 GHz corresponding fundamental mode, and another 7.8 higher order . The DRA is composed discs made material with = 9.8, separated by air gap. upper disc...

A low profile pentagonal shaped monopole antenna is designed and presented for wearable applications. The main objective of this paper to design a miniaturized ultrawide band planar which can work efficiently in free space but also on the surface human body. impact tissues performance explained using proposed antenna. with radiator matched feed line 50 ohm square slots are integrated defected ground FR4 substrate size 15 mm × 25 achieve (UWB) proximity. This overall will enhance wide...

A patch antenna is designed to work at several wireless applications presented in this paper. microstrip with rectangular slots on the radiating has been proposed This can be used for WLAN applications. The bandwidth provided by 2.4-2.49 GHz which operated a return loss below -19.53dB and resonating frequency 2.428GHz. simulated results have obtained using FEKO software. tested of model

This study presents a compact, low-profile, and flexible fabric antenna specifically designed for on-body Wireless Body Area Networks operating within the Industrial, Scientific, Medical (ISM) frequency band at central of 2.45 GHz.The proposed employs jeans substrate, with dielectric constant εr = 1.67 loss tangent tan δ 0.025, which is 0.5 mm in thickness, allowing its flexibility.The incorporates slots on patch Defected Ground Structure (DGS), total size 36 × 55 0.6 3 (0.29λo 0.45λo...

A unique strategy for the design of reconfigurable microwave absorbers based on frequency selective surface (FSS) concept is presented in this paper. Three different topologies are considered (namely, Structure A, B, and C), their resonance frequencies varied by increasing height subsequently changing capacitance value, with help a modular interlocking block system. This reconfigurability further reduces electrical size absorber structures, thereby leading to miniaturization. has an...

In this paper, we study an underlay device-to-device (D2D) communication system where the secondary D2D transmitter ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$D_{Tx}$</tex-math></inline-formula> ) communicates with receiver notation="LaTeX">$D_{Rx}$</tex-math></inline-formula> under ultra-reliable low-latency (URLLC) constraints. The attempts to send mission-critical information fixed and...

In this paper, an underlay cognitive molecular communication (MC) system with anomalous diffusion inside a blood-vessel like cylindrical channel is considered. We consider the presence of primary and secondary link in coexistence, having higher priority for communication. To meet certain quality standard (QoS) at link, interference due to minimized by controlling transmission secondary. The expressions concentration Green's function (CGF) number molecules transmitted transmitter are derived....

In this paper, an antenna design is proposed for use in Cognitive Radio (CR) applications the TV white Space (TVWS) frequency range (470-806 MHz). The situation of TVWS India discussed along with needs spectrum sensing through wideband CR application. A triangular patch considered as a base design. Then, to achieve desired bandwidth TVWS, loading meander line and passive ring performed which excites additional resonances adjacent main resonance. This results enhancement bandwidth. other...

Spectrum crowding has led to increased demand for developing communication in other unused bandwidths, giving rise applications like cognitive radio (CR). A wideband patch antenna spectrum sensing of the TV white space (TVWS) is designed and fabricated 470-806 MHz. The proposed two different feeding techniques: microstrip line coplanar waveguide (CPW) feeding. Slots are introduced obtain resonance desired band a miniaturized design. better performance more practical applicability CPW-fed...

Usually, WSN systems are designed to gather sensor data from the monitored area. The is gathered by base station nodes in network. Monitoring of one important part networks. Conventionally, there various visualization tools for monitoring WSN, which connected server PCs or station. drawbacks such visualizer were distance and communication unavailability limitations. In this paper, RemoteWSN, a platform along with weight based routing algorithm proposed. RemoteWSN location independent system...

Abstract In this paper, we propose a novel miniaturized, flexible wearable rectangular patch antenna with Defected Ground Structure (DGS) for wireless body area network application. The resonance frequency and bandwidth of antenna, which operates in the ISM (Industrial, Scientific, Medical) band, are 2.45 GHz 0.379 GHz, respectively. One most commonly utilized fabrics denim jeans is used as substrate whereas copper tape fabricating patch, feed ground designed antenna. has circular slots...

Abstract A design of a microwave absorber based on frequency selective surface resonating in X-band having ultrathin thickness, polarization controlled behavior, and increased absorption bandwidth has been reported. The reported its unit cell embodied multiple structures which includes conventional square, circular, butterfly shaped resonators resulting three apexes at 9.44, 10.00, 10.53 GHz (all X band) with 99.9%, 99%, 95.1% absorptivity obtained the frequencies resonances. It demonstrates...

This article has been retracted. A retraction notice can be found at https://doi.org/10.3233/JIFS-219433.

Abstract A 3D-printed polarization-independent low-cost lightweight and flexible frequency selective surface based dual-band microwave absorber is presented in this paper. Two concentric square loops fabricated at different heights using 3D printing technology are responsible for exhibiting responses 3.32 GHz (S-band) 5.46 (C-band) with more than 97% absorptivities. The corresponding full widths half maximum bandwidths observed as 230 MHz (3.21–3.44 GHz) 450 (5.27–5.72 GHz). proposed...

Abstract A reconfigurable frequency selective surface (FSS) based absorber structure has been designed using a novel, cost-effective, simple to operate and easy fabricate 3D printed interlocking blocks. Four different topologies have investigated validated through simulation experimental studies. The basic geometry comprises mounting board, on which blocks can be attached studs. reconfigurability obtained by mechanically changing various resonating the results in four distinct absorption...

In this paper, we present an approach for performance enhancement of antenna millimeter wave (mmWave) applications.From mmWave band, a 30 GHz frequency is selected designing patch as it suitable the number applications.Then designed modified by inserting capacitive structure i.e., inter-digital capacitor (IDC) better impedance matching.Insertion IDC results in size reduction along with increased directivity and gain.Similarly, technique capable providing extra resonance advantage fine...

In the present work, a dual feed, compact circularly polarized antenna is designed for activity classification purpose. It consists of circular ring on top substrate which acts as radiating patch. The ground plane exactly compliments patch and thus circle with radius equal to inner ring. A rectangular stub added impedance matching. has been fabricated measured results are in very good agreement simulations. Excellent polarization performance observed highly desirable intended application....

In this paper, we consider an underlay cognitive molecular communication (MC) system inside a cylindrical diffusive-channel. We primary and secondary link operating simultaneously that channel, with the having higher priority over link. Based on co-channel interference (CCI) at receiver, number of molecules transmitted by transmitter is controlled. The performance channel analyzed based probability error effects limits are analyzed. Monte-Carlo simulations presented for validating derived...

The proposed model in this paper introduces a triple band polarization independent microwave absorber for C and X applications. unit cell design proffers cyclo-square shaped resonator at the centre surrounded by quarter part of circular ring with different thickness each corner on metal ground platted dielectric substrate. is insensitive, conformal stable under oblique incident angle TE TM polarized wave up to 45°. Ultrathin <tex xmlns:mml="http://www.w3.org/1998/Math/MathML"...