Valentín Hernández, Emmanuel

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    Design and analysis of capacitively-fed folded slot and rectangular patch antenna for body centric wireless comunications
    (2015) Valentín Hernández, Emmanuel; Rodríguez Solís, Rafael A.; College of Engineering; Colom Ustariz, José G.; Filipovic, Dejan S.; Juan García, Eduardo J.; Department of Electrical and Computer Engineering; Cancelos, Silvina
    In this thesis two antenna configurations are designed and modified, to operate in the 2.45 GHz ISM Band, to be used in body centric wireless communication applications. The two configurations were a Capacitively-Fed Folded Slot Antenna and a Rectangular Patch Antenna. The rectangular patch was modified to work as a quarter wavelength structure with three loading slots, and by adding a parasitic patch. This new modified configuration represents a contribution for this work. After the modifications, a bandwidth of 100 MHz and gain of 4.5dB were achieved. The capacitively-fed folded slot antenna was modified by adding eight loading slots which represents another contribution of this work. With this modification the antenna length was reduced to 16 mm in a 40 mm by 40 mm ground plane with a gain of 4.27 dB, and bandwidth of 20 MHz. Both antennas were fabricated and measured in the UPRM Microwave and Millimeter-Wave System Laboratory to validate the results obtained from simulations The effect of the human body was analyzed by simulations with a uniform model of the human body developed during the research. The human body does not show a significant effect in antenna performance. This effect was seen in both of the proposed antennas.