Mulero-Hernández, Carlos A.

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    Design of V-band beam-switching substrate integrated waveguide fed aperture coupled microstrip patch arrays with beam-switching capabilities for off-body communications in body centric wireless networks
    (2016-07) Mulero-Hernández, Carlos A.; Rodríguez-Solís, Rafael A.; College of Engineering; Colom-Ustariz, José G.; Filipovic, Dejan S.; Department of Electrical and Computer Engineering; Colon Reyes, Omar
    This work presents the design of a multiport, multilayer 4x4 array for use in 60 GHz body centric wireless networks. The antenna designed operates in a 14.29% -10dB bandwidth, from 56.16 to 64.8 GHz, to target the IEEE 802.11ad standard. The two versions of the presented array achieve 16.63 dBi and 15.76 dBi of gain at the center frequency. In order to distribute power in this multiport, multilayer array, Vertical Substrate Integrated Waveguide (SIW) T-Junctions were created. These T-Junctions act as 3 dB power dividers throughout the band and are the key elements in the corporate feed. They were designed to match adjacent substrate levels for the RO4350 substrate. The thickness pairs that are matched are: 254 µm and 254 µm, 508 µm and 762 µm, and 254 µm and 508 µm. To provide a means to test the array independently, coaxial to SIW transitions were designed as well. The designed transitions allow coupling from a 1.85mm coaxial connector to 1.5mm wide, 254 µm tall SIW and 1.6mm wide, 762 µm tall SIW; both implemented in RO4350. The effect of the human body was studied using a human body model created using the electrical parameters of skin at 60 GHz. The skin’s effect was not determined to be detrimental to the antenna’s intended operation.