A Narrow Beam Steering Antenna Array for Indoor Positioning Systems Based on Wireless Sensor Network

This paper proposes the 2.45 GHz planar Beam Steering Antenna Array for Indoor Positioning Systems. The antenna array consists of a phase shifter based on 4 × Butler matrix, and an four dipole Yagi antennas. By choosing one beams using switching controller, main beam can steer in directions from +37°, –12°, +12° to –36°. has narrow fan with beamwidth azimuth plane +21.5° +24.5° elevation approximately 90° which effectively minimizes multipath signals. These advantages are suitable positioning systems increase location accuracy. achieves peak gain 9.1 9.8 dBi directions, wide band 400 MHz. fully electronically steerable prototype been designed CST software, simulated finite element method, fabricated RO4003C substrate as well measured. is implemented System three different methods, including trilateration, triangulation, fingerprinting, highlight antenna’s improving accuracy ratio between mean error area 0.051, 0.033, 0.023 respectively.