Performance Enhancement of 5G Millimeter Wave Antenna Module Integrated Tablet Device

This article describes the design and considerations for millimeter-wave (mmWave) 5G antenna modules embedded in a tablet device. The antenna module consists of eight-chain broadside antenna array and two pairs of four-chain endfire antenna array. A dual-polarized air-filled stacked patch antenna is designed for the broadside patch antenna. Although the performance can be deteriorated due to a plastic cover, the proposed antenna enables an adaptable design for a dielectric cover. A novel surface-mountable chip antenna is also proposed, to implement a vertical polarized (V-pol.) endfire antenna on a low-profile substrate. To integrate a dual-polarized endfire antenna in a confined space, a horizontal polarized (H-pol.) mesh grid antenna and a V-pol. chip antenna are collinearly integrated. In addition, a plastic cover on the tablet is modified to enhance the performance of the endfire antenna array. The cumulative distribution function (cdf) of effective isotropic radiated power (EIRP) is utilized to evaluate spherical coverage, based on the 5G standard of 3rd Generation Partnership Project (3GPP). The spherical coverages are presented by varying the types of plastic cover, the effects of the blockage, and the number of mmWave 5G modules.