Jaramillo-Henao, Carlos A.

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    Design and characterization of broad band and multi-band slot ring antennas
    (2004) Jaramillo-Henao, Carlos A.; Rodríguez-Solís, Rafael A.; College of Engineering; Colom-Ustáriz, José G.; Cruz-Pol, Sandra L.; Department of Electrical and Computer Engineering; González-Barreto, David
    In this thesis, the Design of Experiments technique is applied to characterize rectangular slot ring antennas in terms of their physical dimensions and relative permittivity of the substrate. Several 25 factorial designs were simulated in two different electromagnetic simulators, Momentum and Designer, to collect data for the statistical analysis. Three different approaches were used to identify the most influential factors in the antenna response. The first one was an intuitive approach using a geometrical representation of the DOE input factors. This approach allowed to identify the factors that affected the antenna resonance frequency, multiband operation, impedance bandwidth and return loss. The second approach was based on a linear regression model that was applied to the return loss response. Confidence frequency bands based on the adjusted determination coefficient were presented; in these bands the linear regression models were reliable to identify the significant factors in the antenna response. Finally, several linear models for different resonance frequencies and antenna input impedance were computed using punctual responses and two replicates of the same design. In order to validate the simulations some prototypes were fabricated and tested.