Giacomo Bianconi

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The paper presents a numerically efficient and accurate technique for the analysis of large, finite and conformal Frequency Selective Surfaces (FSSs) that are not amenable to analysis by using conventional methods applicable to infinite, planar and doubly-periodic FSSs. The proposed technique begins by employing the Characteristic Basis Functions (CBFs) to(More)
In this paper, we describe a three-dimensional frequency-selective surface (FSS) element that generates a flat bandpass response over a wide band, as well as controllable low-pass angular response. The unit cell, which consists of a waveguide element with two connected cascaded radiating elements, exhibits a flat bandpass response over the frequency range(More)
In this paper we present an efficient technique for analyzing RF and microwave circuits printed on layered media. The method is based on combining a new Equivalent Medium Approach (EMA) — which obviates that need to construct layered medium Green's functions — with the Characteristic Basis Function Method (CBFM). A numerical example, which(More)
A new bidimensional fitting procedure for the evaluation of multilayer Green's functions for 2.5D problems is presented. The procedure is based on interpolation with spline polynomials and is capable of generating very accurate results much more rapidly than if the conventional Discrete Complex Image Method (DCIM) were used to compute the Green's function.(More)
In this paper we introduce a universal Method of Moment (MoM)-based formulation, which overcomes some of the drawbacks of conventional frequency domain techniques. Formulating the problem in a way that bypasses the evaluation of the electric field as a summation of scalar and vector potential terms enables us to overcome the low-frequency breakdown when(More)
We study the resilience of complex networks against attacks in which nodes are targeted intelligently, but where disabling a node has a cost to the attacker which depends on its degree. Attackers have to meet these costs with limited resources, which constrains their actions. A network’s integrity is quantified in terms of the efficacy of the process that(More)
In this paper we present two simulation techniques for modeling periodic structures with three-dimensional elements in general. The first of these is based on the Method of Moments (MoM) and is suitable for thin-wire structures, which could be either PEC or plasmonic, e.g., nanowires at optical wavelengths. The second is a Finite Difference Time Domain(More)
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