Investigation of Millimeter-wave Antennas for the 5th Generation Mobile Communications

Antennas play an important role in recent mobile communications. Forecast of 5Gmobile communications launching in the year of 2020, it will boost the data rate up toseveral giga-byte per second for instant massive data communications with seamlessmobility and high coverage. 5G networks probably require high integration with 2G, 3Gand LTE systems to achieve the proposed ultimate goals. These enforceablerequirements post challenges to our antenna designers and researchers. Unlike theconventional generations of mobile communications, the operation of 5G networks maymove to the millimeter-wave spectrum with the steerable directional beam at mobilephones and base stations. Wireless industries often look into emerging antennatechnologies that can provide a low-cost and high-performance antenna with wideband,high gain, stable radiation, and steerable beam characteristics.This study attempts to explore a number of new approaches that will apply to mobiledevices and base stations for the coming 5G communications. The devoted antennascombined with conventional PCB and recent 3D printing technologies to be developed islow-cost and simple. In this proposal, four identified research objects will beinvestigated. Firstly, a study of wider bandwidth of directional differential-fed or SIW-fedantennas will be carried out. The solution by composing slots and dipole/patchradiating sources shows improvement in the gain and bandwidth. Secondly, the gainenhancement technique for the antenna by adding a novel dielectric polarizer will beinvestigated. A noticeable gain improvement resulted in potential frequency spectrumscan be used in next generation of mobile communication systems. Thirdly, a newdielectric polarized lens antenna is formed by incorporating the positive results drivenfrom the first & second hypotheses. Lastly, a multi-port and steerable directional beamantenna for high-gain achievement with linear or circular polarization will bedemonstrated.