Slow Electromagnetic Waves: Theory and New Applications

In this chapter, the usage of slow electromagnetic waves in several application domains is deeply discussed. Starting from an outline of the classical Cerenkov effect, various related topics are presented in detail, namely the generation of electromagnetic waves by the Cerenkov effect, the Cerenkov free-electron laser, pickup and kickers in accelerators, pulse compression in radar and linac, and compact components and waveguides in the microwave region

Does the Embodiment Influence the Success of Visuo-haptic Learning?

The purpose of this work is to demonstrate the influence of embodiment on the success of Visuo-haptic Learning, as it has not been yet investigated by current literature. With this aim, we conducted an experimental campaign to compare the users’ Sense of Embodiment (SoE) and learning success values obtained by experiencing the same simulated duty cycle within two different Visuo-haptic Learning environments. Interesting results have been found: the embodiment influenced the users’ completion time and mental workload, but it did not have particular incidence on the obtained learning level (intended as knowledge of the procedure). With this work, we aim to highlight the necessity of conducting wider and deeper studies about the influence of human factors and subjective perceptions on the success of Visuo-haptic Learning

Analysis and design of passive and active microstrip reflectarrays

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Dual-Band Dual-Linear Polarization Reflectarray for mmWaves/5G Applications

A dual-band dual-linear polarization reflectarray configuration is developed for future 5G cellular applications. A single layer unit cell including two pairs of miniaturized fractal patches is designed to operate at two distinct frequencies within the Ka-band (27/32 GHz), in a dual-polarization mode. An in-depth analysis of the unit cell behavior is carried out, to demonstrate the total independence between the designed frequency bands and polarizations. The proposed configuration offers a very simply and thin structure, small unit cell sizes, and low losses, while leading to an independent optimization of the phase at each frequency and polarization. A dual-band/dual-polarized reflectarray prototype is designed and tested, thus demonstrating the unit cell flexibility to offer arbitrary beam directions/shapes at each frequency, for both polarizations