In this paper, a miniaturized ultra-wideband antipodal tapered slot antenna with exponential strip arms is presented. Two designed equations are optimized to reduce the lower edge cut-off frequency of impedance bandwidth from 1480 MHz 720 MHz, resulting in miniaturization by 51%. This approach also improves without compromising radiation characteristics. The dimension proposed structure includi...

In this paper, we present a systematic approach to the design, optimization and characterization of a broadband 5:1 bandwidth (0.8 to 4.0 GHz) antenna subarray. The array element is an optimized-taper antipodal Vivaldi slot with a bandwidth of 2.5:1. Two such elements of different sizes and with 0.4 GHz (10% of the highest frequency) overlapping bandwidths are arrayed in a nested lattice above ...

Abstract—This paper describes the use of the correlation maps in the Ground Penetrating Radar (GPR) for the detection of near surface objects. This method is based on the definition of bi-dimensional maps that describe the level and the nature of coherence between the received electromagnetic signals. The technique proposed provides the detection of objects, reducing the impact of the clutter a...

With the rise of portal sites for image-file download of musical scores, the electronic distribution of musical scores, an activity in progress of 15 years, has attracted increased attention. We describe several data models for score distribution and emphasize the one used in the MuseData archive of musical data (1984–). This archive (containing substantial quantities of the music of Bach, Hand...

A. Bombelli, M. Henry, S. Castaldi, S. Adu-Bredu, A. Arneth, A. de Grandcourt, E. Grieco, W. L. Kutsch, V. Lehsten, A. Rasile, M. Reichstein, K. Tansey, U. Weber, and R. Valentini Department of Forest Environment and Resources (DISAFRI), University of Tuscia, via S. Camillo de Lellis, 01100 Viterbo, Italy Institut de Recherche pour le Développement, IRD, UR SeqBio, SupAgro, Bat. 12, 2 place Via...

In this paper, a wideband photonic phased array antenna is demonstrated. The array configuration consists of a 4x1 Vivaldi single-polarization antenna array and an independent photonic phasing system for each element. The phasing network of this array is implemented using two novel photonic phase shifters based on the vector summation approach. A vector sum phase shifter (VSPS), which can be co...

Is this a new idea? Speculation about the musical nature of animal song goes back to ancient myths from all over the world, many of which claim that human music came from, or was inspired by, animal song. Imitations of animal songs populate traditional music from numerous cultures, and appear in some of the earliest notated music. Pieces by Vivaldi, Beethoven, and Messiaen, among others, includ...

A retrodirective beamforming system (BFS) based on a Rotman lens is proposed for far-field wireless power transfer at Ka-band. The true-time-delay property of the allows wideband operation covering 28–38 GHz. designed BFS comprises with nine beam ports connected to nine-element linear Vivaldi array. implemented using PCB technology ease manufacturing and low-cost processing. simulated measured ...