The proliferation of the Internet Things (IoT) propels continuous demand for compact, low-cost, and high-performance multiband filters. This paper introduces a novel low-profile dual-band bandpass filter (BPF) constructed with back-to-back coupled pair shielded folded quarter-mode substrate integrated waveguide (SF-QMSIW) multimode cavities. A hybrid structure is obtained by etching coplanar (CPW) coupling line in cavity’s septum layer. It serves multiple functions: generating an additional...

ABSTRACT A transition from air‐filled rectangular waveguide (RWG) to substrate‐integrated (SIW) is proposed that covers the entire D‐band (110–170 GHz). Broadband operation obtained by leveraging a resonant slot and an aperture‐coupled patch antenna‐in‐waveguide, while co‐optimisation with dielectric‐loading superstrate matches both resonances RWG ensures full operation. Special attention devoted stringent design restrictions originate its implementation in standard any‐layer high density...

A novel highly efficient leaky-wave antenna (LWA), based on a periodic set of holes created in half-mode substrate integrated waveguide (SIW), is conceived for automotive radar. The computer-aided design this partially filled SIW (PFSIW) LWA carried out using full-wave electromagnetic simulator. As proof-of-concept, an prototype having plate size 15 × 126 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> fabricated through standard...

This article presents a full-wave method to characterize lossy conductors in an interconnect setting. To this end, novel and accurate differential surface admittance operator for cuboids based on entire domain basis functions is formulated. By combining new with the augmented electric field integral equation, comprehensive broadband characterization obtained. Compared state of art modeling, we prove accuracy improved speed formulation. Additional examples support these conclusions by...

This paper discusses the design of an 8×8 phased array antenna tile for Ku-band mobile satellite communications. The has low-profile, high-gain, and wide-angle scanning properties. steps electromagnetic analysis a dual-polarized radiating element comprised these elements are presented. structure makes it possible communication (SATCOM) terminals with compact sizes, because whole front-end might be on same multilayer printed circuit board (PCB). With geometry 25% bandwidth, promises excellent...

Lifelong learning is a highly important issue that most of the governments emphasize on their education programs. It commonly known there are various requirements such as how to learn, improving communication skills, teamwork abilities and controlling time-money etc. In order successful in professional life, besides theoretical knowledge. Most these mentioned even needed our daily life be able learn efficiently, any desired field. This study presents results survey carried out evaluate...

The Internet of Things requires highly efficient ultra-wideband antenna systems that yield high performance at low manufacturing cost. Therefore, a novel circular air-filled substrate-integrated-waveguide (AFSIW) cavity-backed annular slot is proposed enables straightforward integration into general-purpose materials by means standard techniques. cavity top plane, serving as aperture, contains two concentric slots, both split shorting tabs create virtual electric wall. This the generation...

A high-performance dual-polarized eight-element air-filled substrate-integrated-waveguide (AFSIW) cavity-backed patch antenna array is presented. The operates in the [26.5-29.5] GHz band and provides a stable high data-rate wireless communication link between end-user terminals access points next-generation cellular systems. Its topology carefully selected to maximize performance of array. In addition, by combining AFSIW technology with new architecture, low-profile, low-cost, stable, design...

This paper presents a dual-band, polarization independent FSS for ISM and Wi-Fi shielding. The proposed structure has band-stop characteristic 2.5 5.1 GHz with fractional bandwidth of 42% 7%, respectively. substrate the is transparent material having permittivity value 2.77 thickness 1.48 mm, which provides band-pass characteristics visible spectrum. design, fabrication, measurement were conducted TM TE polarizations; satisfactory agreement was obtained.

Although all existing air-filled substrate integrated waveguide (AFSIW) topologies yield a substrate-independent electrical performance, they rely on dedicated, expensive, laminates to form regions that contain the electromagnetic fields. This paper proposes novel AFSIW manufacturing technology, enabling straightforward integration of high-performance microwave components into wide range general-purpose commercially available surface materials by means standard additive (3-D printing) or...

To quantify waveguide dispersion uncertainty, we propose a stochastic analysis technique based on the polynomial chaos method, where Smolyak sparse grids are used as sample spaces for recently developed nonintrusive testing (ST) technique. This strategy allows smaller set of candidate collocation nodes in ST algorithm compared with computationally expensive tensor grid approach. The method is tailored to structures statistically spatially varying dielectric-property profile, which then...

This study presents the design of a dual-band cavity-backed phased array antenna with wide-angle scanning capability in K/Ka bands for geostationary (GSO)-fixed satellite service (FSS). To reduce losses and mutual coupling, novel element similar to Strip-Slot-Air-Inverted-Patch (SSAIP) is proposed as an designed 81 elements. Wide-angle up 60 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</sup> achieved at both frequency operation. The...

In this study, a method for determining scattering center (or of points) multipath is proposed, provided that the direction arrival known by receiver. The based on classical electromagnetic wave principles in order to determine over irregular terrain. Geometrical optics (GO) along with Fresnel zone concept employed, as receiver, transmitter positions and terrain data are assumed be provided. proposed could used at UHF bands, especially, operations radars electronic warfare applications.

For unobtrusive smart-surface integration, an air-filled substrate-integrated waveguide (AFSIW) antenna for the [5.15-5.85]GHz band is co-designed with a tunable matching network and cavity-integrated biasing circuit. It features reconfigurable to mitigate impedance mismatch due objects in its reactive near field. A digitally controlled circuit switched-mode power supply seamlessly integrated inside cavity accurately control through serial interface. The proposed impedance-tunable covers...

To address the specific design challenges posed by Internet of Things (IoT), a compact reconfigurable matching network (RMN) is designed to mitigate detuning smartsurface-integrated antennas.The RMN based on third-order Chebyshev topology, composed quarter-wavelength stubs, having well-decoupled varactor at end three shunt stubs.The circuit impedance mismatch between power amplifier and an antenna being detuned objects in its reactive near field.The low-loss transmission tuned controlling...

During the implementation of Internet Things (IoT), performance communication and sensing antennas that are embedded in smart surfaces or devices can be affected by objects their reactive near field due to detuning antenna mismatch. Matching networks have been proposed re-establish impedance matching when become detuned environmental factors. In this work, change reflection coefficient at antenna, presence objects, is first characterized as a function frequency object distance applying...

In this paper, we present the development and performance evaluation of a MIMO ultra-compact camera-integrated antenna, uniquely equipped with polarization diversity. This antenna is designed for seamless integration into pill-shaped capsule, custom-tailored ingestible implantable applications at 868 MHz. Extensive numerical analysis substantiates antenna's robust impedance radiation characteristics across diverse body tissues. Additionally, affirms appropriateness design high-data-rate...

Abstract A multilayer ultra‐wideband frequency selective surface (FSS), which filters the range between 3.38 and 4.66 GHz is presented. The proposed structure having a transparent substrate allows light pass through itself, while it electromagnetic waves at band of interest; has bandwidth 1.28 GHz. For FSS structure, transparency level 52.5% obtained with fractional value 32%. examined layer by layer; structures are evaluated in terms level.

This paper reports on the development of a switched-beam phased array antenna which is first 35 GHz Butler Matrix based single layer substrate. The structure consists four linearly placed rectangular patch antennas, hybrids, two crossovers, 45° phase shifters and corporate feed network. In array, in order to steer beam, 4×4 has been successfully designed simulated. results show that beam can be nearly steered -45°/ -15°/+15°/+45°. scanned gain 8 dBi. switched forming system used modern...

A novel single-feed ultrawideband cavity-backed slotantenna with a reconfigurable polarization capability is demon-strated in substrate-independent air-filled substrate integratedwaveguide (AFSIW) technology for Internet-of-Things applica-tions the [5.15-5.85] GHz frequency band of unlicensednational information infrastructure. The antenna achieves an ul-trawide impedance bandwidth by exploiting double ring slotsand supports four switchable linear states (±45°,0°,+45°,and 90°) leveraging...

ABSTRACT This study presents an artificial neural network (ANN) estimation of the operating frequencies shorting pin‐loaded rectangular microstrip patch antennas. A feed forward back propagation multilayer perceptron structure is applied in study. The results are compared with ones literature and FEM based simulation results. obtained by using this method very good agreement experimental presented literature. Several antennas also simulated a finite element solver these proposed model....

The wireless capsule endoscopy requires a high-resolution camera and compact wideband antenna systems that yield high performance at low manufacturing cost allow easy integration of components into capsule. Therefore, novel ultra-miniaturized meandered along an annular ring substrate is proposed enables straightforward between the wall. contains two rings microstrip lines on dielectric layers. By exciting judiciously positioning their resonance frequencies, all medical device radio...