Analysis of novel compact ultra-wideband patch antenna for multi-polarized 5G sub-6 GHz network applications

A compact wideband dual-polarized antenna for 5G sub-6 GHz applications is analyzed, designed, and experimentally evaluated. The antenna is a swastika-shaped radiating patch, fed at two orthogonal ports to generate dual polarization. An ultra-wide bandwidth of 154% is achieved over a frequency range of 1–7.7 GHz. Six resonating frequencies at 1.8, 6, 6.7, 10, 12 and 13 GHz are obtained. The achieved interport isolation is better than 30 dB. The antenna is suitable for IEEE L/X/Ku bands and IEEE 802.11 a/n/ac/ax and 5G sub-6 GHz, applications along with IEEE 802.11ax systems. The antenna provides circular polarization in IEEE 802.11 a/n/ac/ax and linear polarization in the IEEE L/X/Ku band. A 3-dB axial ratio bandwidth of 36% is obtained from 4.8 to 6.9 GHz. The antenna exhibits an average realized gain of approximately 6.8 dBi across the operating bandwidth with a peak gain of 9.85 dBi. The simulation and measured results are in good agreement.