A Dual Band Miniaturized Spiral-shaped Patch Antenna for 5G and WiFi-5/6 Applications

A dual band spiral-shaped patch antenna (SPA) is designed and proposed for 5G and WiFi-5/6 applications. The Rogers RT 5880 (lossy) substrate with a compact size of 20×20×0.79 mm
³
has been used to design the spiral patch antenna. The dual band antenna resonates at 3.61 GHz (3.53–3.7 GHz) and 5.56 GHz (4.7–7.24 GHz) with very good reflection coefficients of −41.29 dB and −37.85 dB respectively which cover lower 5G (n48 CBRS (USA): 3.55 – 3.7 GHz, Korea: 3.4–3.7 GHz), WiFi-5 (5.15–5.85 GHz) and WiFi-6 (5.925 – 7.125 GHz) bands. It has gain of 1.503 dB, 2.767 dB and directivity of 3.057 dBi, 3.368 dBi and VSWR of 1.017, 1.025 at resonant frequencies 3.61GHz and 5.56 GHz respectively. The peak gain and directivity of the SPA are 3.95 dB and 5 dBi. The spiral-shaped patch with optimized dimensions enhances the antenna performances and ensures good impedance matching to make it suitable for lower 5G and WiFi-5/6 applications.