An Efficient 2 × 64-Element Dual-Linearly-Polarized Dual-Beam Phased Array for 5G mmWave Communications

In this paper, an efficient 2 × 64-element dual-linearly-polarized (dual-LP) dual-beam phased array is proposed for 5G millimeter-wave (mmWave) communication. Since the array consists of two separate 8 × 8 single-linearly-polarized subarrays in the vertical and horizontal polarization, respectively, the couple between the different polarizations is reduced. Each antenna element is a probe-fed 2-element patch antenna array, which improves the total radiated power (TRP) and power efficiency by sacrificing the scanning angle in the vertical plane. The measured horizontal-polarization effective isotropic radiated power (EIRP) at P1dB is 60.14 dBm, while the vertical-polarization EIRP at P1dB is 57.84dBm. Measured results under simultaneous dual-stream operation show that the array could work as a 5G polarization-based multiple-input-multiple-output (MIMO) system when scanning from −20° to 25° in the horizontal plane.