This letter presents a wideband slotted substrate integrated waveguide (SIW) antenna for millimeter-wave 5G mobile handset applications. The antenna is vertically polarized and has a small clearance of 3.3 mm. To realize a wide operating bandwidth, two sets of vias are employed to perform a change in SIW height. Furthermore, a pair of U-shaped slots is used in both top and bottom faces of SIW to improve impedance matching and front to back radiation ratio. The antenna achieves a measured -6-dB bandwidth of 35.7 % (23.4-33.6 GHz) and a -10-dB bandwidth of 17.4 % (26.2-31.2 GHz). The beamforming capability of the antenna array is investigated. The antenna array has good scanning performance and achieves large spatial coverage.

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The human blockage is an important phenomenon that should be considered in millimeter-wave (mm-wave) communication systems. Realizing the blockage behavior could be very valuable in mm-wave link simulations. Several blockage models have been proposed in previous works based on knife edge diffraction (KED), high frequency simulations, and measurements. This work investigates the blockage using a fullbody phantom and proves that the body phantom is accurate enough to replace the human subject in blockage studies for both data and talk modes. A campaign of measurements for these two modes with 17 human subjects of different heights and genders is conducted. The effect of different types of clothes on the body blockage is studied for body phantom and human subject. The impact of relative antenna-user position on the body blockage intensity is investigated, which is hard to do such accurate measurements with human subjects.