In this article, we introduce a synthesis-based design approach for waveguide filters, including singlets. As is known, singlet block comprises one resonator coupled to source and load plus an additional coupling between load. way, pole-zero pair produced, thus allowing the introduction of transmission zero in frequency response. Structure making that uses cascaded singlets (especially implemented technology) has been successfully used realize compact quasi-in-line pseudoelliptic filters....

In future 6G millimeter-wave/sub-THz vehicle-to-everything communication systems, vehicles are expected to be equipped with massive antenna arrays compensate for the severe path loss. However, vehicle-to-vehicle (V2V) direct links prone blockage by surrounding vehicles. Emerging metasurface technologies enable control of electromagnetic wave reflection towards desired direction boost performance. Reconfigurable intelligent surfaces (RIS), and pre-configured counterpart reflecting (IRS),...

This letter presents a novel, simpler, and more accurate synthesis method for inline extracted-pole low-pass prototype filters. At the present, this topology is only synthesized by using section extraction or optimization methods, known to suffer from accuracy problems, especially high-order The described in relies on robustness of coupling-matrix methods it as first step. second step instead transformation obtain desired topology. Three examples are presented validate novel procedure.

A general design procedure for inline waveguide filters with frequency-variant couplings (FVCs) is presented. The goal of the introduction transmission zeros (TZs) in filter response. starts synthesis a low-pass prototype FVC, adopting method that recently appeared literature. then denormalized to obtain an equivalent circuit suitable implementation. last step consists dimensioning physical structure filter, including frequency-dependent couplings, by exploiting equivalence synthesized...

A comprehensive analysis of electromagnetic (EM) inversion applied to pavement profiling by using a monostatic ground penetrating radar (GPR) is presented. Since in GPR systems transfers EM (TEM) horns, the antenna positioned close investigated medium and strong interaction occurs. This effect taken into account modeling with equivalent sources placed on aperture section an accurate within loop order for contribution near-field effects. Experimental results procedure profile estimation...

A line integral formulation of TE-TM mode-matching techniques for scattering problems in waveguides is described. The procedure convenient from a computational point view when the modes must be computed numerically. This reduction to integrals has revealed an interesting property techniques: some coefficients representing coupling between TE and TM are always null, i.e., such uncoupled.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

In this letter, a simplified human body model based on the scalar diffraction theory is proposed. It allows us to evaluate effects of moving person propagation radio signals originated from communication network deployed close by. This novel overcomes limitations due size and position constraints usually employed for static knife-edge representations with paraxial approximation, without introducing complexity complete electromagnetic (EM) simulation. The experimentally validated quantifies...

In this paper, we first present a novel synthesis method based on an even- and odd-mode decomposition. This is capable of synthesizing network under very general hypotheses is, therefore, suitable for lossy filter design. To exploit the increased flexibility new over traditional design techniques, then introduce approach to filters characteristic polynomials evaluation. technique can offer many advantages main one that, once transmission function known using methods, reflection be...

In this letter a new type of singlet is introduced, called stopband singlet. The implemented in rectangular waveguide, exploiting TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">301</sub> as resonating mode and xmlns:xlink="http://www.w3.org/1999/xlink">10</sub> nonresonating bypass coupling. Unlike the previously introduced singlets [which produce one transmission zero (TZ) reflection (RZ)], generates TZ alone (the RZ pushed to infinity)....

This article presents an analytical method for the synthesis of a low-pass prototype filter constituted by cascaded n-tuplets, including resonant node (RN) and nonresonant (NRN). The extends features previously published solutions, limited to RNs only or that allow inclusion NRNs but in rigid configurations. begins with extracted-pole synthesis, arbitrarily defining transmission zeros (TZs). Then, topology transformation is applied grouped blocks obtain desired topology, each n-tuplet...

In the upcoming 6G vehicular networks, connected and automated vehicles are expected to rely on beam-based millimeter-wave/sub-THz vehicle-to-vehicle (V2V) communication links facilitate advanced bandwidth-demanding safety-critical applications. However, at these frequencies is impaired by dynamic blockers, which might limit effective range reliability of V2V links. A common countermeasure blockage consists enriching scattering environment. this context, intelligent reflecting surfaces (IRS)...

We report on the comprehensive experimental characterization of optical crosstalk between waveguides caused by scattering. Our results reveal that a strong power exchange close-placed due to sidewall roughness exists also for high-quality, low-loss waveguides. derive power-law dependence coupling distance waveguides, confirmed an ad hoc developed electromagnetic model. Further, we demonstrate higher order mode excitation scattered light and appearance decorrelation guided modes propagating...

The paper proposes a multi-body electromagnetic (EM) model for the quantitative evaluation of influence multiple human bodies in surroundings radio link. Modeling human-induced fading is key element development real-time Device-Free (or passive) Localization (DFL) and body occupancy tracking systems based on processing Received Signal Strength (RSS) data recorded by radio-frequency devices. proposed physical-statistical model, able to relate RSS measurements position, size, orientation,...

A new method to analyze shielded planar transmission lines with finite metallization thickness is described. It based on a mixed spectral-space domain representation of the Green's function. The allows accurate determination static parameters line great efficiency as compared methods available in literature. Several numerical examples are shown single and coupled lines.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

The design, construction, and basic characteristics of an electronically steered, adaptive phased array antenna for land mobile satellite communications are described here. system includes six microstrip stacked patch antennas, each one connected to RF channel, which include a monolithic microwave/millimeter wave integrated circuit (MMIC) low noise amplifier commercial silicon I-Q modulator. A six-way combiner adds the channels so that resulting signal is introduced in global positioning...

A new type of corrugated horn is presented. It designed to have a dual-profile corrugation, yielding more compact structure with respect standard linear or sinusoidal profiled horns. also shown that the design has some interesting features in terms phase centre location and its level variation over operating bandwidth.

This paper describes the generalized 2.5-D finite-element method (FEM), a powerful to analyze class of waveguide components. The is based on 2-D FEM in combination with sinusoidal variation field third dimension. We discuss application an E-plane branched ortho-mode transducer, septum polarizer, and waffle-iron low-pass filter.

The quasi-TEM analysis of systems lossless coupled transmission lines in an inhomogeneous medium is reviewed. Starting from the generalized telegrapher's equations, characteristic impedance normal modes defined and computed according to three usual definitions for single-line case: power-current, power-voltage voltage-current. Unlike case, it shown that lead general different modal values. Theoretical results are then confirmed by some numerical examples on two coupled-lines systems.< <ETX...

In this paper, a brief description of the line-integral formulation mode matching is recalled, and analysis extended to case TEM mode, normalization integrals, degenerate eigenvalues.

Feasibility of Topological Metawaveguides supporting helical propagation in the microwave range has been recently proven. The advantages unidirectional supported by such waveguides however can only be exploited real devices if topological modes are endowed with capability to interact within themselves as well trivial modes. Here we show a modal launcher interface metawaveguide conventional circular negligible reflection and exploit properties coupled proof concept contra-directional coupler.

In recent years, various research works have been carried out in the UHF partial discharge monitoring of power transformers. The proper design decoupling sensors is very important this application. This paper presents a two-arm Archimedean spiral antenna with ground plane and double sided parallel feeding network as sensor for mentioned Due to some existing limitations context, process somewhat unique compared previous general telecommunication area. measured `10 dB' return loss bandwidth...

An analysis method for circular horns with dielectric inclusions is discussed. The based on 2-D high order finite element coupled to mode matching. Comparison results available in the literature and experimental data a vacuum window horn, typical radio astronomy configuration, validates accuracy efficiency of developed.

This article presents a novel method for the wideband analysis of lossless arbitrary multimode waveguide junctions. The is based on compact model obtained by frequency response at ports only. makes use generalized scattering matrix (GSM) and its derivative capable to deal with large number modes (also below cutoff) small samples.