A Compact SWB-CSF Antenna for Millimetre Wave Wireless Applications

A novel circularly slotted fractal (CSF) super wide band (SWB) antenna for Wireless Fidelity (WiFi-5), Worldwide Interoperability for Microwave Access (WiMAX), Wireless Local Area Network (WLAN), 5G, Ultrawideband (UWB), Ku, K and Ka band wireless applications is proposed. The antenna is printed on FR-4 substrate of size 24 × 30 mm 2 with a 50 Ω microstrip feed line along with defected ground structure (DGS) to provide a − 10 dB bandwidth from 2.99 to 95.82 GHz to cover WiMAX (3.3–3.6 GHz), 5 G (3.3–3.7 GHz), WLAN (5.15–5.825 GHz), UWB (3.1–10.6 GHz), Ku- (12–18 GHz), K- (18–27 GHz) and Ka- (27–40 GHz) band wireless applications. The proposed CSF antenna has a flat gain fluctuating between 3.22 and 6.25 dBi, high peak radiation efficiency of 96.75%, bandwidth ratio (BR) of 32.2:1, bandwidth dimension ratio (BDR) of 2878 in frequency domain and a flat group delay fluctuations of