Dual-polarized shaped-beam transmitarray to obtain a multi-zone coverage for 5G indoor communications

Abstract

A dual-polarized transmitarray antenna is proposed to generate a multi-zone coverage at 28 GHz for 5G indoor communications. The transmitarray radiates a constant power density within its near-field region over a specific area generating different spots in dual-polarization. The different spots are produced by feeding the transmitarray with a cluster of horn antennas, which are spatially distributed to obtain beams in different directions. The performance of the coverage is improved with a Phase-Only Synthesis (POS) of the transmission coefficients. The transmitarray is designed with dielectric-only elements, which provides a low-cost solution. The prototype is measured in a planar acquisition range, showing a high agreement with simulations. The proposed transmitarray together with the spatial feed distribution provides a potential alternative to generate multi-zone coverages in millimeter frequencies.