Diseño y caracterización de una antena circularmente polarizada y de reducido tamaño en tecnología microstrip para aplicaciones en la banda UHF
Fecha
Autores
Autor corporativo
Título de la revista
ISSN de la revista
Título del volumen
Editor
Compartir
Director
Altmetric
Resumen
This project starts based on the theory given by Maxwell´s equations on the interpretation of the electromagnetic phenomena, the transmission line model and the resonant cavity model to understand the antennas microstrip behavior, which are quite good approximation to have an initial criteria design and to better comprehend the antennas’ comportment, although these models lack precision when implementing is the goal, so that is why using a simulation software is indispensable, these software run complex algorithms which give us an effective and precise modeling based on the full-wave method which also includes the moments method. These software tools allow the designer to better understand the causes and effects of antenna design, the above as they offer visualization tools in 2D and 3D both electromagnetic response and impedance response. The work continues with an analysis of conventional techniques which has been used in antenna design so far to get circular polarization and size reduction, carrying out parametric analyses on the antenna responses to a physical variables that belong to the substrate and the geometry solely, and eventually, an analysis is carried on radiofrequency circuits behavior, a simple transmission line in its application as an impedance transformer and when a metamaterial behavior cell is added on its ground layer, finding out the effect caused for that cell in the electric size reduction of the transmission line. Finally hypothesizing that the metamaterial cell would have the same effect in the electric size reduction of a microstrip antenna, and based on all the techniques already studied, the experience gathered, and the effect observed when including metamaterial cells in the structure, we proceed to design an antenna for the UHF band on 915 MHz which could be applicable both satellite applications and radio-frequency identification (RFID) applications, ensuring that it shows circular polarization and a small electric size without neglecting to keep its gain and bandwidth in a decent range.