[Show abstract][Hide abstract] ABSTRACT: A multiobjective genetic algorithm has been applied to design a new
printed, bow-tie antenna for ultrawideband applications, that is, ground penetrating radar, short range and high data rate communications, and
so forth. The ultrawideband performance with respect to antenna impedance and gain is achieved by an optimized resistive
loading profile and flare angle. A low-cost prototype is manufactured and numerical simulations are validated with
Preview · Article · Apr 2013 · International Journal of Antennas and Propagation
[Show abstract][Hide abstract] ABSTRACT: This paper describes the results of the employment of two nondestructive evaluation methods for the diagnostic of the preservation state of stone elements. The first method is based on ultrasonic (US) pulses while the second method uses short electromagnetic pulses. Specifically, these methods were applied to some columns, some of them previously restored. These columns are part of the architectonic heritage of the University of Granada, in particular they are located at the patio de la capilla del Hospital Real of Granada. The objective of this work was the application of systems based on US pulses (in transmission mode) and the ground-penetrating radar systems (electromagnetic tomography) in the diagnosis and detection of possible faults in the interior of columns.
No preview · Article · Dec 2012 · Nondestructive Testing And Evaluation
[Show abstract][Hide abstract] ABSTRACT: In this communication we compare the performance of classical Genetic Algorithms (cGA) with a new type of evolutionary algorithms named Hybrid Taguchi Genetic Algorithms (HTGA) when they are applied to the design of a a new ultrawideband (UWB) thin-wire bow-tie antenna for GPR applications. The broadband performance of the antenna is achieved by resistive loading and by optimizing the number of wires and the angular distances between those wires.
[Show abstract][Hide abstract] ABSTRACT: A Pareto multi-objective genetic algorithm (MOGA) has been applied to the design of non-dispersive, ultra-wideband (UWB), resistively loaded, thin-wire antennas for ground-penetrating radar (GPR) applications. The radiation characteristics of the antennas are optimized, seeking to maximize the bandwidth and the front-to-back ratio. The variables in the design are the value and position of the resistive loads located along the antenna wires, the number of wires and the angular distances between those wires. The radiation characteristics of the optimized antennas are explored and an example of an application to detect cracks in marble blocks is prsented.
No preview · Article · Feb 2007 · Near Surface Geophysics