A Simple ±45° Polarized Patch Antenna Array Based on Single-Sided PCB for Wi-Fi 6/6E Application

A high-gain, broadband, and ±45° polarized patch antenna array with a quite simple configuration for Wi-Fi 6/6E application is proposed in this letter. The antenna consists of a substrate board and a metal layer. All the patches and feeding circuits are printed on the bottom surface of the board. The patches are excited by T-shaped dipoles, which are driven by parallel dual lines. The parameters of the dipoles and parallel dual lines are specially designed to achieve a broadband covering both 5 and 6 GHz bands of Wi-Fi 6/6E. A prototype was fabricated and tested to validate the concept. In agreement with the simulated results, the measured bandwidth with
S
₁₁
< −10 dB for two ports are both 5.00–7.50 GHz, with the isolation higher than 22 dB. Besides, the measured gains for two ports are higher than 9.80 and 9.38 dBi over the operating band. Compared with other unidirectional antennas, the proposed antenna shows great advantages in high gain, low cost, and easy processing.