Abstract In this paper, we report a compact and ultra-wide band antenna on flexible substrate using the 5-(4-(perfluorohexyl)phenyl)thiophene-2-carbaldehyde compound for microwave imaging. contrast to other based imaging systems, such as an array of 16 antennas, proposed bi-static radar system consisting two omnidirectional which reduces complexity overall dimension. The antennas are 20 × 14 mm 2 designed operating at frequencies from 4 6 GHz. To allow implantation into bra, electromagnetic...

In this paper, a dual-band metamaterial absorber (MMA) ring with mirror reflexed C-shape is introduced for X and Ku band sensing applications. The proposed consists of two square resonators C-shape, which reveals distinctive absorption bands in the electromagnetic wave spectrum. mechanism two-band particularly demonstrates resonance frequencies was analyzed using quasi-TEM field distribution. can be tunable by changing size metallic frequency Design analysis meta-absorber performed...

This article presents a metamaterial based on modified asymmetric circular split ring resonator for absorber applications in the microwave regime. (MMA) exhibits four absorption peaks to cover C, X, and Ku band applications. The MMA unit cell is formed low-cost FR4 substrate with electrical dimensions of 0.106 λ0 × λ0, which wavelength, calculated at 4.1 GHz. structured three concentric intercoupled rings obtain maximum 97.9%, 99.1%, 99.5%, 99.95% 4.1, 6.86, 11.3, 13.45 GHz, respectively....

The Internet of Things (IoT) has rapidly expanded for a wide range applications towards smart future world by connecting everything. As result, new challenges emerge in meeting the requirements IoT while retaining optimal performance. These may include power consumption, quality service, localization, security, and accurate modeling characterization wireless channel propagation. Among these challenges, latter is critical to establishing point-to-point communication between sensors. Channel...

Flying Ad-Hoc Network (FANET) is a set of Unmanned Aerial Vehicles (UAVs) inter-connected wirelessly. FANETs self-organize and provide low-cost, adaptable, simple-to-implement flying nodes, enabling them to complete complicated tasks more quickly collectively. The high mobility nodes the highly dynamic topology pose challenges communication design, particularly when creating routing protocol for UAV networks; this has inspired researchers contribute develop technology. Hierarchical technique...

This paper reports a central spiral split-rectangular-shaped metamaterial absorber surrounded by polarization-insensitive ring resonator for s-band applications. The rated absorption is 99.9% at 3.1 GHz when using three-layer structure where the top and ground are made of copper center dielectric material commonly used FR-4 substrate. split gaps have an impact on unit cell increasing high absorption, adequate electric field apparent in outer gap. At GHz, permittivity permeability negative...

Microwave breast imaging has been reported as having the most potential to become an alternative or additional tool existing X-ray mammography technique for detecting tumors. antenna sensor performance plays a significant role in microwave system applications because image quality is mostly affected by array properties like number of sensors and size sensors. In this paper, new successful early detection tumor using balanced slotted antipodal Vivaldi Antenna (BSAVA) presented. The designed...

This paper presents a microstrip antenna-based sensor for detecting salt and sugar in water. The patch antenna is low-cost low-profile modeled to transmit receive an electromagnetic signal. presented consists of crescent-shaped slotted partial ground. compact size the 32 mm × 22 mm. High-frequency structure simulator computer simulation technology are used simulate analyze characteristics antenna. achieves 10 dB return loss from 2.50 18 GHz with 6.10 dBi maximum gain, considerable...

An integrated massive multiple-input multiple-output (mMIMO) antenna system loaded with metamaterial (MTM) is proposed in this article for fifth-generation (5G) applications. Besides, achievement of duple negative (DNG) characteristics using a compact complementary split-ring resonator (SRR), broad epsilon (ENG) more than 1 GHz bandwidth (BW), and near-zero refractive index (NZRI) features are presented. The mMIMO consists eight subarrays three layers that operate the 5G mind band at 3.5...

In this paper, by engineering the filling factor of resonator a hybrid frequency selective surface (FSS), low-profile and application-targeted microwave metamaterial absorber is proposed with polarization angle insensitivity. The FSS on FR4 substrate comprises four identical concentric copper sub SRRs defected ground. square-cut area at center ground were tuned to get desired absorption peaks some IEEE defined frequencies C X bands, which any other available perfect absorbers cannot obtain....

A compact planar monopole ultra-wideband (UWB) antenna with dual band-notched characteristics is proposed in order to minimize the interference between UWB systems and existing world interoperability for microwave access wireless local area network operating bands. The has a microstrip line-fed circular ring radiator one etched partial concentric annular slot semi-circular slot. Two rectangular slots are also connect outer inner periphery of radiator. desired operation can be obtained by...

An Ultrawideband (UWB) octagonal ring-shaped parasitic resonator-based patch antenna for microwave imaging applications is presented in this study, which constructed with a diamond-shaped radiating patch, three octagonal, rectangular slotted resonator elements, and partial slotting ground plane. The main goals of uses elements are improving performance. In the prototype, various kinds slots on plane were investigated, especially irregular zigzag applied to enhance bandwidth, gain,...

This article proposes a novel Airborne Internet of Things Network (AIN) system architecture for monitoring water quality, combining existing wireless technologies with the aid low altitude platform (LAP) to relay data over long distances in hilly terrain. The proposed consists quality sensors, smart utility network (SUN) devices, range (LoRa) an LAP air balloon, and Wi-Fi devices. A measurement campaign was conducted assess system, focusing on communication link reliability stability...

The field of intelligent transportation systems is rapidly evolving, with increasing focus on addressing traffic congestion, a pervasive problem in urban environments. This study contributes to this domain by enhancing prediction models. Traditional models often fall short accurately predicting flow, particularly dynamic settings. limitation necessitates the development more adaptive and accurate predictive manage congestion effectively. In environments, estimation at multi-intersection...