Small 3D array design using superdirective antennas

In this paper, we present a compact broadside superdirective antenna array based on a planar parasitic superdirective unit-element. The array is designed for 905MHz frequency band, its dimensions are 200 × 54 × 24mm3 (0.6λ × 0.16λ × 0.07λ), and it presents a directivity of 9.2dBi and radiation efficiency of 8.3%. Integrating the initial parasitic array in a PCB of 110 × 70mm2, the array total dimensions are 200 × 110 × 70mm3(0.58λ × 0.32λ × 0.2λ), and it presents a directivity of 9.8dBi and radiation efficiency of 64%.