Full-wave electromagnetic solver based on the Transmission Line Matrix Method has been deployed on Grid test-bed. This Grid-based electromagnetic approach exploits the availability of computing node at disposal through the Grid to face the demand of arbitrary large simulations by allocating a corresponding amount of resources hence minimizing the overall elapse time. In order to highlight the b...

In this paper, a one quadrant simultaneous phase/gain control is proposed as a basic unit of an active reflectarray. Perpendicular polarizations in a square patch have been employed for receiving and retransmitting the signal. Its desired phase and gain values have been obtained by means of an adequate biasing of two in quadrature amplifying branches. As an adequate linearity must be assured in...

in this paper a new low profile substrate integrated waveguide (siw) probe-fed h-plane horn antenna structure with improved gain is proposed. the proposed antenna consists of two waveguides including a rectangular and a taper one, in which both, first and third modes of the structure are simultaneously excited leading to a uniform field distribution along the radiating aperture of the antenna a...

This paper presents two designs of high-efficiency polarizer reflectarray antennas able to generate a collimated beam in dual-circular polarization using linearly polarized feed, with application high-gain for data transmission links from Cubesat. First, an 18 cm × operating the 17.2–22.7 GHz band has been designed, fabricated, and tested. The measurements prototype show aperture efficiency 52....

Metasurfaces composed of planar arrays of subwavelength artificial structures show promise for extraordinary light manipulation. They have yielded novel ultrathin optical components such as flat lenses, wave plates, holographic surfaces, and orbital angular momentum manipulation and detection over a broad range of the electromagnetic spectrum. However, the optical properties of metasurfaces dev...

This paper presents a method for the remote interrogation of batteryless humidity sensors based on statistical estimations and three-dimensional beam scanning techniques. As a proof-of-concept demonstration, a Van-Atta reflectarray sensor is interrogated with a 24 GHz Frequency-Modulated ContinuousWave transceiver at various reading ranges. The extension of the proposed approach to passive or m...

A general near-field (NF) in-band synthesis strategy is presented for the direct layout optimization (DLO) of reflectarrays with application to generation plane waves mm-wave band. The technique relies on definition relevant figures merit (FoM) and use a gradient-based minimization algorithm. To this end, volume where NF computed divided into number disjoint regions FoM are defined. These defin...