Mauro Bandinelli

IDS Corporation · ElectroMagnetic Engineering (EME) Division

Due to the large amount of electrical equipment aboard modern aircraft, several EMC problems appear which can be tackled by filtering disturbances at the equipment inputs and shielding cable links (braiding, covering, over-braiding). Among the others, the segregation between interfering cables or bundles of cables becomes crucial to ensure that cou...

Due to the large amount of electrical equipment aboard modern aircraft, several EMC problems appear which can be tackled by filtering disturbances at the equipment inputs and shielding cable links (braiding, covering, over-braiding). Among the others, the segregation between interfering cables or bundles of cables becomes crucial to ensure that cou...

Modern aircraft hosts a large number of electric systems. Due to the transition to a More Electrical Aircraft, future platforms will use even more electric systems. This increases the complexity of the EWIS design from an EMC point of view. When possible, segregation between potentially interfering cables or bundles is a convenient solution to avoi...

Segregation rules are one of the three solutions to overcome EMC problems together with filtering of disturbances at the equipment inputs and shielding of cable links (braiding, covering, over-braiding, etc.). These rules enable mass reduction in the selection of cables and optimal route definition in which compatible cables (having similar levels...

Presents corrections to the paper, “HIRF virtual testing on C-295 aircraft validated with FSV method,” (Gutierrez, G.G., et al), IEEE Trans. Electromagn. Compat., vol. 56, no. 4, pp. 854–863, Aug. 2014. IEEE

A very flexible and efficient iterative physical optics (IPO) algorithm is presented for analyzing the electromagnetic (EM) scattering of complex and electrically large problems. The algorithm accounts for multiple interactions between the objects comprised in the scenarios under the physical optics (PO) approximation. Various techniques for accele...

This paper presents a rigorous dc solution of 3-D Partial Element Equivalent Circuit models. Despite the decoupling of magnetic and electric fields at dc, the correct solution is not trivial. The proposed one is based on a two-step process where first the magnetostatic problem is solved; then, the electrostatic problem is faced by using the solutio...

This paper describes the approach developed to model the current return networks installed aboard aircrafts having parts made in composite materials. The surface partial element equivalent circuit (PEEC) method is adopted for its high-fidelity modeling capabilities, and its accuracy in the low-frequency region, which is of interest for the characte...

A hierarchical quasi-Helmholtz decomposition, originally developed to address the low-frequency and dense-discretization breakdowns for the EFIE, is applied together with an algebraic preconditioner to improve the convergence of the CFIE in multiscale problems. The effectiveness of the proposed method is studied first on some simple examples; next,...

The increasing complexity and stringent performance of RF instruments and payloads often demands that the fi nal RF functional verifi cation be performed on the integrated satellite. In order to minimize the overall time and cost of future antenna integration verifi cation and test campaigns (AIV/AIT), it is necessary to investigate and develop adv...

In this paper, we present an incremental multilevel matrix filling and sparsification scheme for the method of moment (MoM) solution of the electric field integral equation at low and very low frequencies. The proposed scheme allows a strong reduction of the memory requirements without a loss in accuracy. Numerical results show the method performan...

The Intentional Electromagnetic Interference (IEMI) threat to critical infrastructure containing electronic systems presents a formidable compendium of problems. In this paper the IDS (Ingegneria Dei Sistemi1) modeling approach to the IEMI problem is described. The aim is to present a working philosophy to effectively address the IEMI issues. The a...

In this paper, a new iterative full-wave frequency domain PEEC solver is proposed. Based on the classical modified nodal analysis, the convergence of the iterative solution is optimized by resorting to a pertinent scaling of sub-matrices which improves the conditioning of the global left hand side matrix and to a multiscale-based effective precondi...

In this paper, we show the application of numerical simulation for the virtual testing of a very complex system under high-intensity radiated fields (HIRF) conditions. Numerical results have been compared to measurements performed on a C-295 aircraft. The approach is based on the use of multiple tools for the preprocessing, computation, and postpro...

A 30 m Near Field Cassegrain antenna has been accurately simulated using a real 3D acquisition of the reflectors surfaces. Even though no kind of symmetry or approximation can be exploited, Antenna Design Framework (ADF) software is able to model this problem at 1.5 GHz with a full-wave approach and even at 10 GHz with a mixed-methods approach.

A technique called MLayAIM has been recently introduced for the analysis of large planar patch arrays. The method can be profitably applied also to the analysis of metasurfaces. However, in some cases, for example when artificial magnetic surfaces are considered, several pins and/or large vertical metallizations can be present. This reduces the eff...

Welcome to the December 2013 edition of the Antenna Measurement Techniques Association (AMTA) Corner. While we promised highlights from the AMTA 2013 Symposium in Columbus, Ohio, USA, Steve and I are still getting over the massive amounts of food consumed from attending AMTA, followed by the Thanksgiving holiday. We invite you to visit the AMTA Web...

This paper discusses about design, analysis and optimization aspects of metasurface antennas. The design procedure of metasurfaces for the realization of shaped beam antennas and application examples are presented. For the fast analysis and for a suitable use in an optimization loop a customized efficient full wave tool has been developed within th...

This paper presents a systematic methodology based on the Partial Element Equivalent Circuit method to model aircrafts in order to characterize their current return network. The state-of-the-art of numerical modeling techniques for electrically large structures is used to allow accurate and fast simulations. The comparison of the numerical results...

A scaled working policy and some special modelling tools/techniques are presented for the management of wide band interference problems on complex platforms, like IEMI (Intentional ElectroMagnetic Interference) or HIRF (High Intensity Radiated Field), in the frame of industrial processes.

The ongoing depletion of light oil resources and the increasing global energy demand is driving oil&gas companies towards the exploitation of unconventional oil resources. In order to extract crude oil from these resources, a sufficiently low oil viscosity must be achieved, for instance through temperature increase. Electromagnetic irradiation thro...

Nowadays, the final RF functional verification has to be performed on the integrated satellite due to the increasing complexity and stringent performance in RF instruments and payloads. To reduce the global time and cost of future Antenna Integration and Test Verification (AIV/AIT) it needs to develop advanced test methodologies. This paper shows t...

The increasing complexity and stringent performances in RF instruments and payloads testing often demands that the final RF functional verification is performed on the integrated satellite. In order to minimize the cost of future Antenna Integration Verification and Test campaigns (AIV/AIT) it is necessary to investigate and develop advanced test m...

This papers describes a fast full-wave technique methodology for the calculation of coupling among large arrays. The technique is exploited by applying it to the evaluation of coupling among two large Vivaldi arrays made by 40×8 and 16×16 elements.

Due to the depletion and the increasingly high cost of conventional light oil resources, in the future unconventional oils are due to become one of the major hydrocarbon source. In order to extract crude oil from these resources, a sufficiently low viscosity must be achieved, for instance through temperature increase. Electromagnetic irradiation ca...

The importance of heavy oils as energy resource is continuously increasing, thanks to the development of enhanced oil recovery methods, such as thermal recovery. Radiofrequency reservoir heating through a downhole antenna system can be an effective alternative to steam injection methods, giving advantages such as good energy distribution, greater i...

Computer simulations provide invaluable information in HIRF (High Intensity Radiated Field) assessment of air vehicles. In this paper, we use a numerical model of a fictive metallic aircraft provided by EVEKTOR, to show a cross comparison of results found by some of the full-wave solvers developed by partners participating in the HIRF-SE project of...

This paper discusses the integration of a known technique called Oversized Cavity Theory (OCT) for radiated emission and susceptibility analysis (RE/RS) into a commercial simulation framework called Antenna Design Framework — Electromagnetic Satellite (ADF-EMS), which includes standard modelling methods such ad MOM, PO and GTD for the analysis of e...

This paper presents measurement results of the electromagnetic interference (EMI) caused by the plasma plume of ion thrusters firing through the RF beam of reflector antennas. The EMI effect consists mainly in the introduction of discrete spurious modulation products on the RF carrier thus degrading spectral purity. The measurements were carried ou...

Electric propulsion is a commercially attractive solution for attitude and position control of geostationary satellites. Hall-effect ion thrusters generate a localized plasma flow in the surrounding of the satellite, whose impact on the communication system needs to be qualitatively and quantitatively assessed. An electromagnetic modelling tool has...

This paper reports on the preliminary results in functional testing solutions for RF end-to-end antenna testing. The proposed approach is based on the intelligent and innovative use of existing measurement capabilities and advanced numerical modeling tools. The scope of the activity is to demonstrate through the implementation of a demonstrator and...

Radar simulators that are able to accurately reproduce the signal coming from a synthetic environment are powerful instruments for the assessment of the performance of new radar systems. In this work we describe a new airborne meteorological radar simulator that combines the description of the meteorological scenario at mesoscale level with the cap...

A full-wave modeling approach able to manage both simple conducting materials and complex composites and apertures in a real-life model of aircraft has been implemented in a unique code and is hereafter shown. The code is enhanced by a number of acceleration techniques (MLFMA, MR, SFX-3D) that allow to manage very complex model on large frequency r...

Electric propulsion is a commercially attractive solution for attitude and position control of geostationary satellites. Hall-effect ions thrusters generate a localized plasma flow in the surrounding of the satellite, whose impact on the communication system needs to be qualitatively and quantitatively assessed. An electromagnetic modelling tool wa...

Full-wave optimisation of large arrays is computationally intensive problem even with the most advanced solvers. The paper presents a procedure for the full-wave optimisation of arrays based on a space mapping (SM) procedure. The approach combines the efficiency of MoM-based accelerated modelling techniques with physics-based coarse models to reach...

Full-wave reflectors antenna modelling, especially when fed by strongly-interacting radiating structures, e.g. arrays coming into the reflector field-of-view, can be a difficult task for a single tool, which is typically not able to manage multi-scale sub-problems. This communication addresses the feasibility of a procedure for the design of feed-a...

Despite the high level of maturity, the development p rocess of EDA tools for electromagnetic modelling appears to be hindered by a number of contradictions. Three of them have a strong impact on the quality and usability of the products. This paper tries to expound these antinomies and to propose a way out by describing the methodological approach...

In this paper, we present a hybrid technique that combines the Synthetic Functions (SFs) method with the MultiLayer Adaptive Integral Method (MLayAIM). The resulting numerical procedure drastically reduces the computational effort needed in the full-wave analysis and optimization of electrically large antennas as reflectarrays and planar arrays wit...

In this paper we present a Method of Moment (MoM) matrix clipping technique based on the Multi-Resolution (MR) approach able to deal with low frequency problems without loss in accuracy. The MoM matrix sparsification reduces the memory occupation, making it possible to analyze very dense meshes on standard computational hardware. Comparisons in ter...

In this paper, a systematic procedure to design a surface wave excited holographic antenna is proposed. First, an equivalent anisotropic surface impedance is defined by a combination of a desired aperture field and the average electric current distribution of the incident surface wave. This combination is then included as a constrain in an alternat...

Application is presented of the Synthetic Function eXpansion (SFX) method to the accurate analysis of devices that incorporate microstrip-technology electromagnetic band-gap structures of large but finite size. The strong reduction of the dimension of the system matrix achieved employing the SFX technique reduces the solution time and the memory oc...

The application is described the synthetic function expansion (SFX) approach to large arrays of aperture-coupled antennas. The problem is formulated in terms of coupled magnetic-field continuity integral equations (MFCIE) and electric field integral equations (EFIE), and discretized via the method of moments (MoM). The SFX is a domain-decomposition...

The antenna design framework - electromagnetic satellite is an antenna design system offering a wide palette of modeling tools aimed at covering engineering needs from the early feasibility studies to the last performance-verification stages of flight hardware. A few key ideas have been central to its development, focusing on the overall engineerin...

A general domain decomposition scheme based on the use of complex sources is presented for the analysis of electromagnetic interactions in complex environments. First, the original problem is divided into separated subdomains that are independently analyzed; then, the interactions among different subdomains are described through a generalized netwo...

The keyword in the actual panorama of large antenna farm and scattering problems modelling is ldquoaccuracyrdquo or, in other words, the concept of ldquohigh fidelity modellingrdquo, the only way to cut development and/or prototyping costs. The integral equation (IE) approach is typically used to manage antenna problems where the accuracy is a basi...

Medium gain antennas, in dual polarisation, with high polarisation purity and return loss, operating over a total bandwidth of 30% or more, are needed for numerous applications in the space and ground segments. Such requirements can be satisfied with a novel antenna solutions in multi-layer composite technology as described in previous publications...

Reflectarrays (RA) are currently perceived as an important technology for high-performance antennas, especially in space and defence applications. In this communication two acceleration methods are applied to a general-purpose moment method procedure. In particular, the synthetic functions expansion (SFX) and sparse matrix - adaptive integral metho...

The design and development of space antennas, both for satellite and user terminals, involves a large spectrum of electromagnetic modelling problems, ranging from guided- wave propagation in complex structures to full-wave modelling of large arrays, including the back-radiation, to accurate modelling of reflector antennas, including manufacturing d...

Application of the synthetic function expansion (SFX) approach for the case of aperture coupled structures is investigated. Problems involving slots or apertures into an infinite metal plane are formulated in terms of the magnetic-field continuity equation (MFCIE) for the unknown magnetic currents, typically in association with an electric field in...

A full wave hybrid numerical technique is presented for the analysis of horn antennas with general cross section interior taper and arbitrarily shaped outer surface. A mode matching (MM)/ edge based two-dimensional finite element (FE) method is employed for the generalized scattering matrix (GSM) of the stepped-waveguide model of the inner horn tap...

An optimum dual band self-diplexed antenna, particularly suitable to accomplish the demanding requirements of the European Navigation System (GALILEO) is highlighted. The antenna relies on the key enabling technologies previously developed for the pioneering GIOVE-A satellite (Galileo In Orbit Validation Element) successfully flown on 28 December 2...

Satellite uplink antennas for SHF band communications may require high resolution adaptive nulling capability to provide sufficient pattern gain to desired users while maintaining pattern nulls on interference sources in close proximity to the users. Multiple beams antennas (MBA) consisting of an aperture illuminated by a collection of feeds locate...

At present radio communications and radio assistance services aboard aircrafts and helicopters are generally scattered among a number of antennas and sensors across the whole airframe. This policy, which is probably convenient from the point of view of equipment procurement, inevitably causes installation problems on medium/small aircraft, helicopt...

The Artemis subproject, in the framework of the UE Capri project, deals with porting on parallel architectures of a Method of Moment (MoM) code for electromagnetic design and hardening of telecommunication centres against the effects of lightning strokes. After a preliminary stage of the work during which QR and LU algorithms for large complex matr...

In the framework of the UE CAPRI project, the Artemis subproject deals with porting on parallel architectures of a Method of Moment (MoM) code for electromagnetic design and hardening of telecommunication centres against the effects of lightning strokes. As a preliminary stage of the work, QR and LU algorithms for large complex matrix inversion wer...

VHF and UHF antennas installed aboard small and medium size satellites usually strongly interact with the bus structure and with appendages, due to the fact that their dimensions can be resonant with respect to the antenna wavelength. This may significantly deteriorate performance and requirements may not be met due to the electromagnetic interacti...

This paper describes the antenna design framework and arrays implementing the virtual workbench concept. Antenna design framework is a multimethods environment where both the general purpose and specialized CAD tools are able to cooperate in the formation of complex modelling procedures. A set of functions collected in the "Antenna Models Conversio...

Electromagnetic (EM) coupling through apertures of arbitrary shape in a perfectly conducting infinite screen of negligible thickness, is considered. In particular, general configurations that include the presence of wires are analyzed. These may be asymmetrically located on both sides of the aperture, with some element passing through the aperture....

A numerical procedure is derived for the analysis of electromagnetic field penetration through apertures of arbitrary shape in perfectly conducting infinite planar screens of negligible thickness. The technique proposed allows one to analyze general configurations in which the aperture is located in the neighborhood of wire structures. These may be...

This paper presents a numerical modeling method developed for evaluating electromagnetic (EM) interference on the equipment inside a telecommunication exchange caused by a direct lightning stroke to a telecommunication tower close (i.e., a few meters) to the exchange building. Considering two different bonding configurations, EM interference is eva...

The increasing complexity of electronic payloads on satellites and aircraft has resulted in an increase in electromagnetic compatibility (EMC) test campaign costs and duration. Affordable simulation tools can help system engineers to reduce costs and prevent damage during tests. A method of moments (MOM) based simulation tool for the analysis of el...

This paper presents a numerical procedure which can be effectively used for the analysis/design of a very-low frequency capacitive antenna system on complex platforms and for charge distribution computation. The 'quasi static' radiation problem was solved by means of the corresponding electrostatic solution, by using a Method Of Moments (MOM) proce...

The Geometrical Theory of Diffraction effectiveness in its Uniform version, with several higher order terms has been evaluated through the experimental validation of computed results, in scattering problems involving simple geometries.

Very sophisticated antenna models are available today for the accurate prediction of antenna performances, in particular those included in the European Antenna Modeling Library in which GRASP, ADF and SATSim are key components [1, 2]. However these models are not directly suitable for Phase 0/A and early Phase B activities in a Model-Based System E...

The WRAS (Wideband Radiator Antenna Subsystem) antenna has been specifically developed to meet the GALILEOSAT mission planned within 2005. The WRAS antenna is a planar array designed to be a dual band transmitter and is the result of high integration between structural and electrical parts to keep the envelope reduced as much as possible. All the a...

Accurate modelling of arrays is required in order to perform design activities and excitation law synthesis. Specially care must be devoted to the mutual coupling among cells which, if not properly controlled, can lead to wrong designs and also can give undesirable effects such as the well known "scan blindness" one. This paper presents a Moment Me...