Delgado-Castillo, Rubén F.M.

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    Design of V-Band substrate integrated waveguide fed aperture coupled microstrip patch arrays with circular polarization and parasitic patch for off-body communications in body centric wireless networks
    (2017-05) Delgado-Castillo, Rubén F.M.; Rodríguez-Solís, Rafael A.; College of Engineering; Colom-Ustariz, José G.; Medina, Rafael; Department of Electrical and Computer Engineering; Zapata, Rocio
    This work presents the design of a multi-layer radiating element and a multi-layer 2x2 array for use in 60 GHz body centric wireless networks. The antenna designed operates with an impedance bandwidth of 11.6%, from 57 to 64 GHz, covering the IEEE 802.11ad standard. The antenna element has a circularly polarized radiation, with a 9.2% axial ratio bandwidth. The antenna gain is 7.06 dBc circular gain at the central frequency. The antenna element is fed through a taper in substrate integrated waveguide (SIW), and a coaxial to SIW transition. A SIW tapered line helps to increase the impedance from the coaxial to the antenna impedance. SIW lines were designed in two layers to reduce the substrate size of the feed. The first feed layer contain SIW taper line, and in the second the coaxial transition. The coaxial transition work as individual design that can be implemented in another designs and in the 2x2 array. The effect of the human body on the electric parameters of the antennas at 60 GHz was studied. The presence of skin has a negligible effect on electrical performance of the antennas at the frequency of interest.