Design and analysis of clover leaf‐shaped fractal antenna integrated with stepped impedance resonator for wireless applications

A novel multi-band clover leaf-shaped fractal antenna with integrated filtering to reduce higher order harmonics has been proposed. Existing microstrip antennas endure limited gain, narrow impedance bandwidth, and undesired frequency radiations. The proposed is designated operate simultaneously in following operating bands: 3.35–3.6 GHz for WiMAX, 5.156–5.825 WLAN, 5.7–6.4 Intelligent Transport Systems (ITS), 7.7–8.5 ITU-R applications. patch realized by combining two semi-fractal ring patches like the geometry of a three-leaf dual-layered stepped resonator (SIR) at bottom layer second substrate. SIR bandpass filter exhibits odd even modes suppresses An aperture coupled feeding offers better bandwidth matching. number iterations increased get desired multiband characteristics. geometrical dimensions 50 × 2 mm3. It observed that both simulated measured results peak gain >5 dBi return loss (S11), is, 3.3–3.6-GHz band S11 −33.73 dB, 5.15–5.825-GHz −36.69 5.795–6.4-GHz shows −36.25 7.725–8.5 GHz, −33.209 dB. Harmonics 6.42 (1.8f0), 7.37 (1.5f0), 9.04 (1.73f0) suppressed linear polarization WLAN circular WiMAX bands.