Two-Row ESPAR Antenna With Simple Elevation and Azimuth Beam Switching

In this letter, we propose a two-row electronically steerable parasitic array radiator antenna designed for direction-of-arrival (DoA) estimation in Internet of Things (IoT) applications relying on simple microcontrollers. The is capable elevation and azimuth beam switching using microcontroller-oriented steering circuit, provides 18 directional radiation patterns, which can be grouped 3 distinctive sets having different directions the elevation. For each direction, there are six configurations that cover 360° horizontal plane. Measurements realized prototype carried out an anechoic chamber show good agreement with numerical simulations. low sidelobe level, half power beamwidth both directions, exhibit monotonous drop from maximum value all patterns. Therefore, candidate IoT nodes DoA situations when radio frequency signals impinging