Ricerc@Sapienza

In this paper we compare current implementations of commonly used numerical techniques the Finite-Difference Time-Domain (FDTD) method, the Finite-Integration Technique (FIT), and Time-Domain Integral Equations (TDIE) to solve the canonical problem of a horizontal dipole antenna radiating over lossless and lossy half-spaces. These types of environment are important starting points for simulating many Ground Penetrating Radar (GPR) applications which operate in the near-field of the antenna, where the interaction among the antenna, the ground, and targets is important.

The AlphaSat TDP5 experiment, also now as Aldo Paraboni, is a scientific experiment held by the European Space Agency (ESA) to investigate radio propagation channel in the Ka and Q bands. The AlphaSat satellite was launched in orbit in 2013 and since then several European research group have been monitoring the received beacon signals to model physical effects of the atmosphere on the transmitted electromagnetic field. This article is aimed to describe the AlphaSat receiving station in Rome, focusing on the latest upgrade of the Ka-band receiver.

The knowledge of dielectric properties of biological tissue is of fundamental importance for the development of diagnostic or therapeutic applications of electromagnetic fields, as microwave imaging or microwave thermal ablation. In this paper, a quality factor is introduced to identify the soundness of measurements of dielectric properties performed with different set-ups and procedures.

High frequencies in the microwave spectrum are nowadays no more just con ned to telemetry and remote sensing applications. Electromagnetic propagation at frequencies above 6 GHz for ICT end-user application is quickly becoming a reality opening the door to the world of millimeter and sub-millimeter wavelengths. Due to the high frequencies and large bandwidths requested for new devices, the design of the communication links to grant the appropriate service is now critical, especially for Satellite to Earth links.