Pattern and Polarization Diversity Multi-Sector Annular Antenna for IoT Applications

This work proposes a small pattern and polarization diversity multi-sector annular antenna with electrical size profile of ka = 1.2 0.018λ, respectively. The is planar comprises sectors that are fed using different ports to enable digital beamforming techniques, efficiency gain up 78% 4.62 dBi, cavity mode analysis used describe the design concept diversity. proposed method can produce states (e.g. linearly circularly polarized patterns) characteristics covering elevation plane. Owing its size, low-profile properties, solution shows good promise advanced radio applications like wireless physical layer security in many emerging size-constrained Internet Things (IoT) devices.