Francesco de Paulis

Francesco de Paulis
Università degli Studi dell'Aquila | Università dell'Aquila · Department of Industrial and Information Engineering and Economics

PhD

About

166
Publications
19,526
Reads
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1,788
Citations
Introduction
Francesco de Paulis (IEEE S' 08, M' 13) was born in L'Aquila, Italy in 1981. He received the Specialist degree (summa cum laude) in Electronic Engineering from University of L’Aquila, L’Aquila, Italy, in 2006, the M.S. degree from the MS&T, Rolla MO, USA in 2008, and the PhD from the University of L’Aquila in 2012. He is currently a Researcher at the University of L'Aquila. His main research interests are in SI/PI design on PCB, packages interposers and chips, analysis and characterization of composite materials for shielding, RF interference in mixed-signal system, TSVs in silicon chips and interposers, EMC measurement based on NF-FF transformation techniques, design of T/R modules and electronic systems for space applications, remote fault detection in transmission lines.
Additional affiliations
February 2012 - November 2015
Università degli Studi dell'Aquila
Position
  • Research Assistant
August 2006 - May 2008
Missouri University of Science and Technology
Position
  • Research Assistant, Master Student

Publications

Publications (166)
Article
Full-text available
The de‐embedding is a technique used in radio frequency and signal integrity measurements to extract the scattering (S)‐parameters of the device under test (DUT) from the measured data of a global assembly and based on known S‐parameters of the left and right test fixtures; thus, it removes the impact of the text fixtures used for the connection of...
Article
An all-weather broadband high-gain antenna for maritime communication applications is developed in this paper. The proposed antenna, which is devised from the perspective of hydrodynamics, hydrostatics, and electromagnetic performance, is based on combining a wideband high-efficiency electromagnetic radiation structure (WHEMS) and a W reflector to...
Article
Full-text available
In this article, a corrugated horn feed antenna with a stable phase center is designed for the millimeter wave compact antenna test range (CATR). The calculation method of the phase center of a horn is analyzed in this article. The 45°‐plane phase center is used as the combined phase center of the horn in order to perform the phase center calculati...
Article
Full-text available
The complexity of electronic systems for RF and digital applications is ever increasing, and the corresponding compliance analysis for ensuring the required specifications in terms of performances, signal and power integrity is a challenging task often accomplished by relying on commercial circuit simulators. The modeling of multiport devices invol...
Article
In modern wireless communication systems, the signal-to-noise ratio (SNR) is one of the most important performance indicators. When the other radio frequency (RF) performance of the components is well designed, passive intermodulation (PIM) interference may become an important factor limiting the system’s SNR. Whether it is a base station, an indoo...
Article
A compact and highly isolated three-sector linear array is proposed targeting at point-to-point or point-to-multipoint data communication in Central Business District (CBD) and residential subdivision applications. It features wide bandwidth, high isolation among the units, low wind load, low manufacturing and installation costs within the 400-500...
Article
Full-text available
The measurement of the phased array antenna (PAA) is completely different from the traditional antenna, due to its multi beam patterns. Usually, each beam pattern of the PAA needs a separate measurement, which makes the overall time extremely long. Thus, the traditional method can no longer meet the efficiency and cost requirements of new PAA measu...
Article
The advent of the fifth generation New Radio (5G NR) is pushing toward an extension of the traditional Sub-6G communication bands to 6 GHz and above. Such trend calls for an update of multi-probe measurement systems for an accurate Over-The-Air (OTA) characterization of such new devices. The new measurement requires the precise calibration of the m...
Preprint
Full-text available
The testing requirements of the active phased array antennas are very different from those of traditional passive antennas, due to its beam steering capability. Usually, each beam profile of the active phased array needs a separate radiation pattern test, which makes the overall testing time extremely long. Thus the traditional antenna test method...
Article
Full-text available
The de-embedding of measurement fixtures is relevant for an accurate experimental characterization of radio frequency and digital electronic devices. The standard technique consists in removing the effects of the measurement fixtures by the calculation of the transfer scattering parameters (T-parameters) from the available measured (or simulated) g...
Article
Full-text available
This paper presents an approximate method that allows the calculation of the maximum measurable gain (MMG) in an anechoic chamber. This method is realized by using a low passive intermodulation (PIM) medium-gain directional antenna. By reducing the distance between the antenna and the wall of the chamber to reduce path loss, the purpose of replacin...
Article
A bendable Frequency Selective Surface (FSS) is proposed in this letter; it is based on short carbon fibers embedded into an epoxy resin whose characteristics are set in order to provide the required mechanical flexibility. The frequency response of the FSS is of band-stop type due to the half-wavelength resonance of the used short dipoles. The FSS...
Article
Full-text available
An accurate monitoring of power system behavior is a hot-topic for modern grid operation. Low-frequency oscillations (LFO), such as inter-area electromechanical oscillations, are detrimental phenomena impairing the development of the grid itself and also the integration of renewable sources. An interesting countermeasure to prevent the occurrence o...
Article
This letter presents a technique for designing metallic packages and cavities hosting RF and/or digital electronic systems for minimizing the unintentional coupling due to cavity resonances. The method involves an appropriate design of the conductive lid by adding periodic structures, unit cells (UCs), characterized by metal pins of appropriate len...
Article
Full-text available
The objective of this study is the development of an efficient methodology, based on the spherical wave expansion theory, to evaluate the total unwanted electromagnetic radiation of multiple radiation sources starting from the knowledge of the radiation characteristic of every single source considered as isolated. The specific application domain de...
Article
Full-text available
A metal enclosure whose lid is covered by an array of metal pins is studied in this article. The pins are able to realize a fictitious perfect magnetic conductor surface at the pin end, thus inhibiting cavity resonances in a well-defined frequency band. The article proposes an analytical model for predicting the behavior of the cavity, and thus for...
Article
Full-text available
An iterative optimization for decoupling capacitor placement on a power delivery network (PDN) is presented based on Genetic Algorithm (GA) and Artificial Neural Network (ANN). The ANN is first trained by an appropriate set of results obtained by a commercial simulator. Once the ANN is ready, it is used within an iterative GA process to place a min...
Article
Full-text available
To reduce the noise created by a power delivery network, the number, the value of decoupling capacitors and their arrangement on the board are critical to reaching this goal. This work deals with specific improvements, implemented on a genetic algorithm, which used for the optimization of the decoupling capacitors in order to obtain the frequency s...
Article
Full-text available
Conventional physics-based via circuit model takes into account the capacitive coupling between via barrel and power/ground plane by a via-plate capacitor, whose calculation relies on a complex expression involving an infinite summation of Hankel functions. In this paper, a capacitor-free via model is proposed and realized by way of a novel transmi...
Article
Full-text available
Decoupling capacitors are fundamental keys for the reduction of transient noise in power delivery networks; their arrangement and values are crucial for reaching this goal. This work deals with the optimization of the decoupling capacitors of a power delivery network by using a nature-inspired algorithm. In particular, the capacitance value and the...
Conference Paper
Full-text available
In this communication we present and discuss the design and the spectral response of metamaterials for an effective frequency selection of electromagnetic radiation in the 1-5 THz spectral region. These metametarials behave like split-ring-resonators positioned on flat Si substrates and present a single frequency resonance of the transmission curve...
Article
Full-text available
This work presents the feasibility study of an on-line monitoring technique aimed to discover unwanted variations of longitudinal impedance along the line (also named “impedance discontinuities”) and, possibly, incipient faults typically occurring on high voltage power transmission lines, like those generated by oxidated midspan joints or bolted jo...
Article
The aim of this paper is to develop a new approach for wiring networks diagnosis. This approach is based on time domain reflectometry (TDR) and pattern recognition network all combined with a simple localisation and characterisation algorithm. The developed approach has the advantage of being fast, reliable and accurate. The TDR responses are gener...
Article
Full-text available
Earth observation from space radar is based on Active Electronically Steerable Antenna (AESA) whose performances count on reliable and powerful transmit/receive modules (TRM). To this aim, as a follow-up of the successful demonstration of a low-footprint transmit/receive hybrid module concept based on 3D packaging and interconnect technologies (3DT...
Article
One of the state-of-the-art strategies to decrease the isolation between sections of personal digital assistance devices, taking into account the unavoidable thermal, mechanical, weight, and manufacturability constraints is the proper introduction of electromagnetic (EM) absorbing materials. The global target of this study is the optimized synthesi...
Article
This paper describes the job carried out for the developing of an analytical model that is able to calculates the input impedance of a power distribution network (PDN) by taking into account modeling of package and PCB. PDNs are usually already widely available, the work focuses on the chip and interposer PDN. The model has been used by an optimize...
Article
Full-text available
The aim of this paper is to present a novel and compact transmit/receive module (TRM) for enhancing antenna performances to be employed in space applications. The key advancement is the use of a 3-D technology which, to the best of our knowledge, would be for the first time introduced in the space industry for hermetically packaging RF modules. The...
Article
In this letter, the effect of fiber material on the electrical performance of the frequency selective surface is investigated based on a novel three-dimensional band-stop structure consisting of an array of finite conductive cylindrical fibers embedded in a dielectric host material. For this purpose, aluminum and carbon materials are considered for...
Conference Paper
Full-text available
The analytical formula of the via barrel-plate capacitance has been widely used for the analyses of signal integrity, power integrity and electromagnetic compatibility of via-plate-pair structures by way of a physics-based via circuit model. This formula involves an infinite summation which must be truncated in real calculation. An improper truncat...
Article
Full-text available
The widely-used analytical formula for the barrel-plate capacitance in the physics-based via circuit model involves an infinite summation, which requires a truncation during practical computations. Such a truncation is problem-dependent and prone to either underestimate the capacitance value or ruin the computation when truncating too late. This pa...
Article
Optimally designed arrays are used to obtain high gain and directivity. Based on the desired application, different radiation patterns can be generated. These patterns have generally a main beam and some sidelobes. These last ones are undesirable because they can cause electromagnetic interference and compatibility issues. Therefore, sidelobe level...
Article
This contribution deals with the optimal placement of the decoupling capacitances on the gridded power delivery network of a multichip assembly with interposer. The optimization is performed by means of a nature-inspired algorithm of the genetic class. Different placement strategies are considered and compared. The cost function is based on the eva...
Article
This paper explores the possibility to develop a measurement system appropriate for testing mm-wave 5G equipment, with the far-field (FF) evaluated from near-field (NF) measurements. To this aim, the theory of the cylindrical NF-FF transformation is first reviewed, then several details of the theoretical and analytical expressions are clarified to...
Article
Full-text available
Equivalent-circuit models for efficiently simulating 2-D power distribution networks (PDNs) in packages and chips are usually based on a star-type network, where all the branch networks have one port at the star center. This letter presents a simple analytical method for constructing the start network without relying on circuit simulators. The meth...
Article
This contribution analyzes the performance of a commercial absorbing material, in near field, selected for the reduction of electromagnetic emissions generated by an integrated circuit (IC). The signal port is placed as far as possible from the ground port, in order to force the current to follow the longest path. Shielding effectiveness, wave impe...
Book
An essential guide to the background, design, and application of common-mode filtering structures in modern high-speed differential communication links. Written by a team of experts in the field, Electromagnetic Bandgap (EBG) Structures explores the practical electromagnetic bandgap based common mode filters for power integrity applications and cov...
Article
Electromagnetic emission from electronic devices is one of the aspect to be considered from electromagnetic Engineers and Designers; its prediction can be essential to avoid the degradation of the performance of the system. Using absorbing material is one way to limit and control the emission from devices such as integrated circuits (ICs). This pap...
Article
Full-text available
The aim of this contribution is to develop a procedure in order to identify and to model the intrinsic electric discontinuities in high-voltage overhead transmission lines to better design power line communications applications. The modeling is based on the results of a rigorous campaign of measurement carried out in collaboration with the Italian...
Article
This study covers the design, manufacturing, and experimental electrical tests for a novel three-dimensional (3-D) band-pass frequency selective surfaces (FSS) containing continuous and discontinuous conductive fibers. The proposed FSS is designed based on 3-D numerical simulations to operate in the frequency range 8–12 GHz with resonant frequency...
Article
In this study, an X-band band-stop frequency selective surface (FSS) consisting of aligned finite length periodic conductive cylindrical fibers embedded in a dielectric host material is designed, manufactured, and electrically tested in the frequency range of 2 to 18 GHz. Furthermore, an equivalent circuit model is developed to estimate the electri...
Chapter
This chapter explores the practical considerations of designing and executing experiments to validate the operation of the electromagnetic bandgap (EBG) designs. It discusses experimental design issues when cross talk performance is being studied. The EBG filters operate at or near a resonant frequency, and the resonant modes of the cavity between...
Chapter
The frequency of the data signal sometimes shows slight variations, again, making the EBG filter not effective. The depth of the notch is not as important as the notch's bandwidth (BW). Achieving a 5-10 dB deep filter performance across a wider frequency range is more important than the notch depth. This led to the necessity to find ways to widen t...
Chapter
This chapter introduces a complete procedure for the analysis of planar electromagnetic bandgap (EBG) structures based on the concept of total inductance. The planar EBG is made by a sequence of patches connected by narrow bridges, thus altering the ideal solid plane pair geometry usually employed for power delivery purposes and signal/power return...
Chapter
This chapter investigates the electromagnetic phenomena involved in the propagation of a signal on a microstrip over an electromagnetic bandgap (EBG) structure, when an interconnect is referenced to the shaped (or patterned) layer. In a real board where the EBG structure is employed in the stack-up of a multilayer printed circuit board (PCB), some...
Chapter
Subsequent to the introduction of the onboard electromagnetic bandgap (EGB)-based common mode filters, this chapter describes their evolution to removable EBG-based common mode (R-EBG CM) filters. This chapter describes the different topologies available for the removable EBG filters, ranging from the configuration with the traces kept on the main...
Chapter
This chapter reviews the role of common mode (CM) filters in high-density printed circuit board (PCB) designs and the previously analyzed beneficial properties of the electromagnetic bandgap (EBG) structures. It introduces the concept of a CM filter based on patch resonant cavities and the operating principle underlying the construction of EBG-base...
Article
The present work develops a unitary finite difference time domain (FDTD) formulation to take into account the unavoidable coupling, of resistive nature, among the N ports of a general termination network at the ends of lossy and externally excited multiconductor transmission lines. It completes the contribution of a previous paper where a FDTD sche...
Article
After having studied and implemented the original Werner's equations for the evaluation in closed form of the near-field components produced by an electric dipole, there have been identified a number of them that can be transformed by analytical manipulation in a more convenient form for a quick and accurate computation. In this study, the new form...
Article
Full-text available
In this paper, a novel de-embedding methodology is proposed for through silicon via (TSV) characterization by using a set of simple yet efficient test patterns. For all the test patterns, full wave models are developed and the electrical performance of the test patterns is analyzed thoroughly. Furthermore, broadband measurements are performed for t...
Article
The ever growing complexity of electronic circuits placed at the ends of multiconductor transmission line models requires also taking into account the electrical coupling among all ports of their equivalent termination networks. This work develops an explicit finite difference time-domain scheme that takes into account a lumped resistive coupling a...
Article
Small form factors and high bandwidth are two imperatives nowadays for three-dimensional integrated circuits (3-D-ICs). These requirements can be achieved by the use of through silicon vias, by the reduction of their radius and, at the same time, of the pitch among them. Having a considerable number of devices in a limited space inevitably increase...
Article
We propose, for the first time, an explicit semiconductor physics-based through-silicon via (TSV) capacitance-voltage (CV) model. The effect of TSV CV hysteresis is demonstrated in the model, and the TSV capacitance is modeled with respect to dc bias voltage and the dimension of the TSV. The proposed model is verified by comparison to the measureme...
Article
This paper analyzes, in a quantitative way, the properties of the spatial distribution at the interface of the wave impedance as defined by Schelkunoff, in order to understand if and under which assumptions his transmission line theory for the evaluation of the shielding effectiveness can be used in the near-field region of a radiating electric dip...
Article
The problem of a correct modeling of the electromagnetic field distribution in the near field region is one of the most challenging and interesting due to its direct implication in the engineering evaluation of the shielding effectiveness of materials and structures in close proximity of radiating sources. This paper deals with a detailed analysis...
Chapter
Wiring networks are vital connections in which power and signals can be transmitted. Defects in these networks can have dramatic consequences, and it is therefore of paramount importance to quickly detect and accurately locate and characterize defects in these networks. In one side, the time-domain reflectometry (TDR) is a measurement concept that...
Article
This contribution analyzes in a quantitative way the properties of two closed form equations, and their results in near field, for the radiation of an electric dipole. One kind of equation describe t