“PAAS-5G” Spatially Polarized MIMO Phased Array Antenna Systems for 5G Wireless Communications
The massive mobile data requirement has increased in last ten years mainly due to the video content. This is due to the capability of mobile handsets supporting 4k resolution which requires the data rate of 15.4Mbps1. This increase is due to the increasing number of user and viewing time. This will result in an annual traffic of 296.8 excabytes(EB) by 20192. 5G communication network (IMT 2020) is the solution to match this high data demand, with a capability of reaching up to data rate of 20Gbps. 5G not only targeting enhanced mobile broadband (eMBB), but also it has diverse usage scenarios including, ultra reliable and low latency communication (URLLC) and massive machine type communication(mMTC). To meet with the design challenges of 5G , frontend antenna layout for base stations and mobile hand set is intense area of research.
Phased array antenna systems are the potential candidate for 5G. A lot of research work has been done to explore different types of phased antenna array systems as 2D and 3D arrays3. Using 2D and 3D arrays reduces the overall size of the antenna system and improves beamforming and spatial separation. Spatial separation can be achieved by the dual polarization, whereas beamforming can be achieved by compact design of the array elements. These compact array designs poses a challenge to reduce the spatial correlation and mutual coupling.