Design of a new multiband planar fractal antenna array for wireless power transmission

This paper presents a new multiband planar antenna array based on fractal geometry. This structure is validated in ISM band at 2.4 GHz and 5.8 GHz which makes it suitable for wireless power transmission applications. The return loss at the validated bands is around -18 dB. The radiation pattern shows wide aperture angles characteristics of 75° with a gain of 8 dBi at both bands. The antenna is designed on an FR4 substrate with 120 × 63 mm² as dimensions, 4.4 as relative permittivity, 1.6 mm as height and 0.025 as loss tangent.