Desarrollo de un arreglo circular de antenas utilizando herramientas de electromagnetismo computacional

Abstract

The design of a circular antenna array, with a variable geometry diffracting device placed in it. The idea is to develop a methodology for the simulation of circular antenna array to work in frequency non-ionizing ranges, a limitation of X ray exams such as those for early detection of breast cancer. The array is modeled using computational electromagnetics tools: 1) The method of finite differences in time domain, to transform Maxwell differential equations into finite difference equations to solve them. 2) the method of perfectly matched layers, to establish the absorbing boundary conditions of the system and 3) the conditions of perfect electrical conductor to model the diffracting device. The designed algorithm ensures that there are no spurious reflections which could affect the readings of the sensors and the electromagnetic behavior of the system. Results show that the proposed antenna array is suitable for the development of a system for the early detection of breast cancer working at non ionizing frequencies.